-QuincyQsl

SeriesINDUSTRIAL HELICAL SCREW

AIR COMPRESSORS0[1 FLOODED, SINGLE STAGE

/----

.

.*

InstructionManual

MODEL AND YEAR AIR COOLED & WATER COOLED

235 -- Jan. 1974 THRU Juen 1982350 -- Jan. 1974 THRU May 1983490 -- Jan. 1974 THRU December 1984740 -- Jan. 1974 THRU December 19791000 -- Jan. 1974 THRU December 19791250 -- Jan. 1974 THRU December 19791500 -- Jan. 1974 THRU December 1979

Table of Contents

Typical Watercooled Models QSI-235, QSI-3S0, QSI-490 6 QSI-740 WithButterfly TypeAir Inlet Valve . . . . . . . . . . . . . . . . . . .

Typical Aircooled Models QSI-235, QSI-350, QSI-490 & QSI-740 WithButterfly TypeAir Inlet Valve .,....... . . . . . . . . . .

Typical Watercooled Cabinet Model , . . , . . . . . , . . . . . , ,

Typical Watercooled Models QSI-1OOO, QSI-12S0 G QSI-1500 WithCombination Air Inlet/Check Valve and Watercooled AftercoolerOption. , . . . . . . . . . . , . . . . . . . . . . . . . . . . . .

Quincy QSI Specifications. . . . . . . . . . . . . . . . . . . . .

Section I. Description

1.

::4.

5.

6.7.8.

General Description of Quincy Industrial AirCompressors . . . . , . . . . . . . . . . . . . . .Principles of Compressor Operation . . . . . . . . .Description of Air Flow . . . . . . . . . . . . . .Description of Oil Flow and Compressor CoolingSystem. . . . . . . . . . . . . . . . . . . . . . .Description of the Air Receiver/Oil Reservoir andAir/OilSeparator . . . , . . . . . . . . , . . .Description of the ~apacity Control System . . , . .Description of Electrical System . , , . . . , , , .Description of Aftercooler Option . . , . . . . . .

Section 11. Installation

1.2.3.4.5.

6.7.

::

Selecting the Installation SiteMoving the Unit to the Installati;n”S;t; : : :Uncrating the Unit . . , . . . . , . . . . . .Electrical Facilities at the Installation SiteWater and Sewer Facilities at the InstallationSite (Watercooled Models Only) . . , , . , . .Coupling Alignment . . . , . . . . . . . . . .Oil Level CheckCompressor Rotati;n*C~e;k” : ~ ~ ~ : : : : : :Fan Rotation Check... . . . . . . . . . . .

● ✎ ✎

✎ ✎ ✎

✎ ✎ ✎

● ✌☛

. . .

. . .

.*.● ✎☛

✎ ✎ ✎

Section III. Operating Procedures

1. Controls and Indicators . . . . . . . . . , . . . .2. Adjustments . . . . . . . . . . . . , . . . , . . .

Initial Start-Up Procedure , . , . . . . . . , . . ,:: Compressor Start-Up Chart , . . . . . . . . . . . .

Section IV, Preventive Maintenance

1. Definition of Preventive Maintenance , . . . . . . ,2* Lubrication , . , . . . . . . . . . . . . . . . . .3. Oil Specifications . . . . . , . . . . . . . . . . s4. Air Intake System . . . . . . . . . . . . . . . . .

Air/OilSeparator . . . , . . . . . . . , . . . . ,:: scavenger Line and Orifice , . . , . . . . , . . . .7. Control Air Line Filter , . . . . . . . , . , . . .

Section V. Trouble Shooting. . . . , . , , . . . . . . , . , . . .

Section VI. Assembly and Disassembly of Common Wearing Parts

1. Oil Seal Disassembly . . . . , . . . . . . . . . . .2. Oil Seal Assembly. . . . . . . . ... . . . . . .

Section VII. Safety Precautions . . . . . . . . . . . . . . . . . .

Page

1

2

3

4

s

777

7

10101015

1!5151515

151517

ii

18192020

21212121212121

22

2626

27

Typical Watercooled Models QSI-235, QSI-350, QSI-490~ QSI-740 With Butterfly Type Air Inlet Valve

High Air Temperature Blow DovmShut-Down Switch Muffler

\ _..-.--”--‘———’———~ Blow Down

Oil Separator 6Oil Filter Dif-ferential Pres- Air Intakesure Switches > Filter>,

\

Outlet

Wate’rTemDeratur6Regulatin~ Valve

Butterfly TypeAir Inlet Valve

/

//

High Air Temperature \ \Shut-Down Switch SensingBulb

-.

Motor

Compressor Discha;ge Compressor \Check Valve 1

Oil Filter Compressor

—-—- —— —..——... ... . ..—. ——.. ..— —— --——— --------------------.------------------------—-—

Typical Aircooled Models QSI-235, QSI-350, QSI-490~ QSI-740 With Butterfly Type Air Inlet Valve

Control Air Differential Aircooled OilPressure Gauge Pilot Valve Oil Cooler

Filter

Blowdown Blowdown

Air Discharge Valve ,Mufflert

Oil Filter andor Oil Separator

:rentialPres-Switches

Air Intake~ Filter

CabinetFrame

‘Butterfly TypeAir Inlet Valve

\ Motor

High Air TemperatureShut-Down Switch I

/Compressor \Discharge Compressor \

Sensing Bulb Check Valve Oil Filter Compressor

2

Typical Watercooled Cabinet Model

3

Typical Watercooled Models QSI-1OOO, QSI-1250~ QSI-1500 With Combination Air Inlet/Check Valve

And Watercooled Aftercooler Option

{ir DischargeTo House ServiceLines \

WatercooledAftercoolerOption ,

CheckValve

i

Blowdown

/ ‘alv’

ControlAir PressureGauge

\

/WatercooledOil Cooler

\~ \ ‘Receiver/ ‘DifferentialWater Oil Filler Oil Level Reservoir PressureInlet Plug Gauge Drain Switches

Blowdown Valve

\

CombinationAir Inlet/Check Valve

EqualizerValve

\\

/DifferentialPilot Valve

/CompressorOil Filter

Compressor Dri’veCoupling

Motor

“DriveCouplingGuard

4

QUHWY QSI SPECIFICATIONS

SPECIFICATIONSPERTAINING TO ALL QUINCY QSI MODELS I

Full MODELS1

Loadpress. 235 350 1 490 740 I 1000 I 1250 I 1500

UNITOFMERSURE

AlfiDELIVERYAT FULL LOADPRESSURE

CFMM3/MIN

CFMM3/f41N

PSIGt(G/CMZ

PSIGHG/cM’

234 355 498 757 1o11 1264 1515

110 6.63 10.05 14.10 21.44 28.63 35.80 42,90

125232 352 494 751 1003 1255 1504

6.57 9,96 13.98 21.25 28.38 35.52 42.56

110125 125 125 125 125 125 125

87.89 87.89 87.89 87.89 87.89 87.89 87.89MAXIMUMOPERATINGPRESSURE

125 140140 I 140 140 140 140 140

9.84 9.84 ]9.84 9.84 9.84 9.84 9.84

COMPRESSOR DRIVE MOTOR(1800RPM)

110 I 50 I 75 I 100HP

COOLING FAN MOTOR (AIRCOOLEIJMODELSONLY)

HP

HP

RPM

1101/15 I 1/15 ! 1/15 ] 1/4 I 1/4 I 1/4 I 1/4— — I — l– 1- l– I — I

VENTILATING FAN MOTOR(WATERCABINETMODELSONLY)

125 1/15 I 1/15 I 1/15 1 1/4 I1/4 ] 1/4 I 1/41 I I 1 t , I

! — I — ! — ! — !– !– i– ICOMPRESSORSPEED 110 \ 1800 I 1800 I 1800 I 1800 I 1800

125 I 1800 i 1800 t 1800 i 1800 I Moo l:% i-+%--l

10,39 12.65 12.65 12.65255. 321.3 321.3 321.310,39 12.65 12.65 12.65255. 321.3 321.3 321.319.60 18.20 27.50 \21.50

COMPRESSORROTORSIZE IN.MM

IN.MM

CU FTLITERS

CU FTLITERS

GAL.LITERS

GAL.LITERS

OF“c

‘F‘c

8.03 8.03 10.39

204. 204. 255.8.03 8.03 10.39204. 204. 255.4,15 6.82 I 9,70

110

125

110RECEIVER/RESERVOIRVOLUMEt 117.52 ]193.12 !274:67

4.15 I6.82 I9.70117.52 t 193,12 I 274.67

125—----+-” ‘- t I

. 1 I

TOTALOILCAPACITY 11011 I 22 I27.541.64 I 83.27 I 104.09——11 ILL 127.541.64 I 83.27 104.091400-1500[1400-1500140=’-150060°-66” I600-660 60°-66”140=’-1500140=’-15001400-150”60”-660 60°-66” 60”-66”16 23 34.560.56 87.05 130.58

16 23 34.560,56 87.05 130.58

i -----1

----- 1,, ?Y.-I

125I

----t

----- 1

RECOMMENDED OIL INJECTIONTEMPERATURERANGE

110

125

OILFLOW RATE GPM,lTER/MIN

GPMlTER/MIN

110225.20 225.20 225.20 225.20

59.5 59.5 59.5 82.5225,20 225.20 225.20 225.20

110 1959 2936 3878 5813 7730 9686 1159.3125 2134 3199 4228 6339 8431 10654 12644110 376 564 792 1187 1610 2014 ! 2417

125

ML COOLERHEATREJECTION BTU/MIN.—

BTU/MINKFTERCOOLERHEATREJECTION125 I376 I 564 ]792 I 1187 I1610 I 2014 I 2417

I

51. ri.mxi- i 1’ r-m- 1’ IiJIiu’ 1. ,IT. %fi 1- 3x/x- 1- -rIi-i t- I.fmr- 1- -ItTmr

.

UNITOFFull

CONTINUEDMODELS

MEASURE pfe~~,‘“ad 2351

350 490 740 1000 1250 I 1500) *SERWCE AIRLINECONNECTION 110 1% 2 2 z% 3 3 3SIZE NPT

1251% I 2 2 2?4 3 3 3. — — — — —

SPECIFICATIONSPERTAINING TO WATERCOOLED MODELS ONLY

WATER FLOW RATE BASED ON GPM 9,66 14.0 18.8 27,8 37.3 46.9 55.065° WATER TEMPERATURE, LITER/MIN 110 36.34 52.99 71.16 105,32 141.18 177,52 208.18RPPLN2ABLET0WATERCOOLEDMODELSWITHAFTERCOOLER

GPM 10.3 15.1 20.2 29.9 40.1 50.4 59.1LITER/MIN 125 38.99 57.15 76,46 113.17 151.78 190.76 223.69

WATER FLOW RATE BASED ON GPM 1108.0 11.75 15,66 23.1 30.9 38.8 45.5

B5° WATER TEMPERATURE, LITER/MIN 30.28 44.47 59.05 87.43 116.96 146.86 172,22llPPLiCABLETO WATER COOLED GPM 8.75 12.8MODELSLESSAFTERCOOLER

17.0 25.2 33.7 42.3 49.6LITER/MIN 125 33.12 48,45 64.35 95.38 127.55 160.11 187.74

RECOMMENDED WATER PRES- PSIG 110 50 50 50 50 50 50 50SURE KG/CM’ 3.52 3.52 3.52 3.52 3.52 3.52 3.52

PSIG 125 5050 50 50 50 50 50

KG/CM’ 3.52 3.52 3.52 3.52 3.52 3.52 352

RECOMMENDED INLET WATER *F 110 50°-850 50°-1000 50°-100” 50°-1000 50°-1000 50°-100” 50°-850tEMPERATURERANGE Oc 10”-300 10°-380 1(1°-380 10°-380 10°-380 10°-380 100-300

‘F 12550°-850 50°-1000 5O”-1OO* 5O”-1OOQ 500-100’=50”-100” 50°-850

“c 10”-300 10°-380 10°-380 10°-380 10°-380 10°-380 10’’-30”

WATERINLETAND OUTLETPIPE 110 ~VNPT

1“ 1“ 1~. l~tf lJ+I1 l~fl

SIZE 125 ~1$ 1“ 1,, l~r? l~rl l~,r l~f,

SPECIFICATIONSPERTAINING TO AIRCOOLED MODELS ONLY

COOLINGFAN AIRFLOW CFM 1105500. 10000. 14500. 21500. 33500. 33500. 33500.

M3/MIN 155,76 283.2 410.64 608.88 948.72 948.72 948.72

CFM 1255500. 10000. 14500. 21500. 33500. 33500. 33500.

Ma/MiN 155.76 283.2 410.64 608,88 948.72 948.72 948.72

*MAXIMUM AMBIENT TEMPER- OF 110105” 1050 105” 1050 1050 1050 105”

ATURE “c 410 410 410 41’= 410 410 410

‘F 125105’= 105° 105° 105° 1050 1050 1050

“c 41” 41” 41” 41° 410 410 41”

*FORHIGHERAMBIENTCONSULTFACTORY

6

SECTION I

DIHXW?TION

1. GENERAL DESCRIPTION OF QUINCY INDUSTRIAL AIRCOMPRESSORS

The compressor is a single stage, positive displace-ment oil-flooded helical screw type unit. The com-pressor consists of two steel rotors. The malerotor is directly driven from the motor through aflexible non-lubricated, drop-out type couplingwith no step-up or step-down gearing used. Themale rotor has four lobes that mesh with a femalerotor consisting of six grooves, Both rotorsare housed in a single cast iron cylinder. Theunit has an axial inlet port at the power input endand a discharge port at the opposite end. Bothrotors are mounted on cylindrical bearings on thesuction end and on angular contact bearings at thedischarge end, The oil is circulated by a positivedisplacement gear-type oil pump mounted on thedischarge end of the compressor, and direct drivenby the rotor.

The electric motor, compressor andassociated equipment are mounted on a rigid frameand enclosed in an acoustical cabinet with anintegral ventilating fan. Controls and indicatorsare grouped on an instrument panel,

2, PRINCIPLES OF COMPRESSOR OPERATION

A cut-away illustration of the helicf: :;::; t:~:compressor is shown at figure 1-2.compressor consists essentially of two rotor; thatresemble worm gears. The male or driving rotorhas four lobes that mesh with the six grooves ofthe female rotor. Both rotors are contained in a

Side View

1 f 1 NN

Figure 1-2,

rotor housing. Both rotors are mounted oncylindrical bearings at the suction end and onangular contact bearings at the discharge end.

As the rotors rotate, air is drawn axially into therotor housing through the air inlet port. Thisvolume of trapped air extends the entire length ofthe two rotors initially and is prevented fromescaping by the unported area of the rotor housin,wall,

As rotation continues, the lobe on the malerotor enters the groove in the $emale rotor, thusreducing the volume of trapped air, resulting incontinuous compression. Compression continues un-til the lobe and groove pair pass the dischargeport. At this point, the compressed air is dis-charged into the line leading to the combinationair receiver/oil reservoir.

3. DESCRIPTION OF AIR FLOW

A functional diagram of the air flow system isshown in figure 1-3. With the compressor operatinga partial vacuum is produced at the compressor in-let, Air entering via the compressor air filterflows through the air inlet valve into the rotorhousing where it is compressed, then discharged in-to the air receiver/oil reservoir. The air dis-charged from the compressor contains oil which isremoved from the air as it passes through the airreceiver oil separator. Compressed air then passesthrough a check valve to the service connection.

The quantity of air entering the compressor isregulated by the air inlet valve located betweenthe air filter and the compressor inlet port. Theposition of the air inlet valve is automaticallycontrolled during normal operation by air demand.

The models QSI-30, QSI-235, QSI-350, QSI-490 andQSI-740 are equipped with a butterfly type air inletvalve and a discharge check valve located betweenthe compressor and the air receiver/oil reservbix.The models QSI-1OOO, QSI-1250 and QSI-1500 have a-air intake valve that provides throttling and chefeatures.

The air receiver/oil reservoir is equip-ped with a safety v,alveto protect the system in theevent of a malfunction in the capacity and pressurecontrol systems. The standard air receiver/oil res-ervoir is rated at 1S0 PSIG. A minimum pressurefeature is provided in the service line to limit themaximum air velocity through the separator.

4. DESCRIPTION OF OIL FLOW AND COMPRESSOR COOLINGSYSTEM

A functional diagram of the compressor oil flowsystem is shown at figure 1-3 and 1-3a. Oil passesfrom the oil supply area of the receiver/reservoirthrough an oil cooler that cools the oil by eitherwater or air, The watercooled oil cooler is ofshell and tube construction. The amount of waterpassing through the oil cooler is controlled by awater temperature regulating valve. This valvesenses the oil temperature leaving the cooler.The aircooled oil cooler consists of a motor drivenfan which forces a continuous supply of cooling airacross a finned tube core section. Heat is dissi-pated through the tubes and fins and blown off intothe atmosphere. Oil injection temperature is main-tained by a thermal valve that intermixes cold andhot oil to a constant temperature. ; .

Oil passes fromthe oil cooler to a line strainer where contaminantsare removed, then to a positive displacement oilpump that is mounted on the discharge end of thecompressor and is driven by the compressor rotor,

All oil passes from the oil pump through a ten (7micron filter that is equipped with a built inrelief valve set to open at 20 PSIG. After the 01.is filtered, it passes to the compressor via theoil gallery where oil is distributed to the suctionend and discharge end rotor bearings, and injectedinto the compressed air, where the heat of compres-sion is absorbed by the oil. The oil and air mix-

7 ture is discharged from the comvessor into the

..-—. --------- -_._. ___ _.

w

I

!WER PIPING AT CWEF3

Models QSI-30, QSI-235, QSI-350, QSI-490 and QSI-740Functional Diegram

n‘~ ‘f /’----------”-------T------pi;%

m WA!N%R---–ELECTRICAL COflAT,CTIOiV5

Figure 1-3.

Cc$wismIMP

TO DkN

Models ”QSI-lOOO,QSI-1250 and QSI-1500 Functional Diagram

w

*------- -— ------ -------~ ---. —-— ---- —-— — ~-- —-=1

iIIIIIII

SOLENOIOEQUALIZING

vALVE

I

/I

IIII

II

/I

iII

III

i

IiII

OIL FILTER DIFFERENTIAL OIL ‘LINEPREsSURE SWITCH sTRAINER

1

sERVICE LINE !PRESSURE I

y

REGULATOR ~ J CONTROL------ LINE FILTER

Figure 1-3A.

AIRAIR PIPING W]

.......”. AIR FLOW AFTERC(XY FRTH

,Kt>>UKC

/

SW TCH+

OPTION

FAN

i=

OPTIONAL

-4’

.—,AIR COOLEO AFT ERCOOLER

iI AIR COOLEO OIL COOLER

i

,,. . .. ----SEPARATOR

.

ik:

1

T

011. THERMAL># ~ \\ sER-VALVE

1-vICE

ff-i=p~ ‘lNE

wATER

LOUT _: M4:EN -

h; id OPT IONAI

PAj EL jECEIVER,RESSURE.

J

GAUGE

I

Iii Ii;...-..-.- .—..-..-..-’

I i. ---- ... ... ... ... ... ... .. . ..:.—. .—. . —.. —.. —.. -.— -------- Q

Y.“1.

TRAP

T’oORAIN

● LOCATEO ON INSTRUMENT PANEL

LE6EttD~ COMPRESSED AIR

~ :&/OIL

❑ COHTROL AIR

❑ l?ATER

----ELECTRICAL CONh’ECTION15’

receiver/reservoirvia the compressor dischargeline.

s. DESCRIPTION OF THE AIR RECEIVER/OIL RESERVOIRAND AIR/OIL SEPAIUTOR

The combination air receiver/oil reservoir consistsessentially of a pressure yessel, as shown in figure1-4. The air receiver also serves as an oil reser-

IL

Figure 1-4,

voir and contains the oil se~arator. The dischari!eline from the compressor ent;rs the receiver at a“point below the normal oil level but turns upwardinside the receiver so that the air/oil mixture isdischarged into the receiver above the oil leveland impinges on the under side of the separator.The receiver is provided with an oil filler openingand dial type oil level gauge,

As the air/oil mix-ture is impinged on the bottom of the air/oil sep-arator> most of the oil separates from the air anddrops to the bottom of the receiver/reservoir.

Asthe air passes through the oil separator, the remainin~ oil will coalesce on the seDarator and droDs in-

6, DESCRIPTION OF THE CAPACITY CONTROL SYSTEM

A functional diagram of the capacity control systemas applicable to the models QSI-235, QSI-350, QSI-490 and QSI-740, is shown in figure 1-3. Beforethe compressor is put into operation, the compres-sion spring in the air cylinder is fully extended,In this position, the controller gear (that iscoupled directly to the compressor air intake valve)is rotated fully counterclockwise,thus positioningthe air intake valve in the open position.

As themotor starts driving the compressor rotors, air isdrawn in, compressed and discharged into thereceiver/reservoir. When the pressure exceeds 110PSIG, air is directed to the controller air cylindervia the differential pilot valve. Due to the outputvolume of the compressor with respect to the volumeof the air receiver, sufficient pressure to move thepiston to the right becomes available almost i?nmed-iately, If no air is being used, the piston pushesthe rack gear forward, which closes the compressorair intake valve. Discharge pressure will normallyrun 110 PSIG for the fully opened air intake valvethen start to close and will be totally closed at125 PSIG. The air intake valve will regulate thecapacity between 100% and O% of the rated delivery.

When maximum pressure has been attained in the airsystem, compressor unloading occurs. The pressureswitch breaks contact and blows down the receiverthrough a solenoid valve and muffler. It also ac-tuates a second solenoid valve that permits air toflow to the pneumatic cylinder holding the intakevalve in the closed position.

When air is requiredfor the plant system, a reduction in pressure willoccur at the pressure switch, permitting the pointsin it to make contact, thus closing the solenoidvalve that vents the receiver and permits air toflow directly to the pneumatic cylinder at the airintake valve. At this time the residual pressureto the pneumatic cylinder is bled off, allowing theintake valve to open and air to start flowing.

A functional diagram of the capacity control systemas applicable to the models QSI-1OOO, QSI-1250 andQSI-lSOO, is shown in figure 1-3A. The air intakevalve has two features combined in one valve. Firs$it is the compressor suction valve and second, itserves as a check valve against reverse flow.

During compressor shut-down, the air intake valvereturn spring keeps the valve in its closed posi-tion. As the motor starts driving the compressorrotors, the air intake valve opens as a result ofpressure differential.

Air is drawn in, compressedand discharged into the receiver. When the receiverpressure exceeds the standard full load pressuresetting of 110 PSIG or 12S PSIG, control air is pas-sed through the differential pressure regulator tothe air cylinder, which in’turn starts closing theair intake valve. As the air demand decreases, thereceiver pressure keeps on increasing until itreaches the standard 125 PSIG or 140 PSIG unloadpressure setting of the pressure switch, The pres-sure switch then breaks contact and allows serviceline pressure (reduced to 40 PSIG through a pres-sure regulator) to close the air intake valve com-pletely. At the same time, the blow-down valveopens venting the receiver pressure to.atmosphere.

7. DESCRIPTION OF ELECTRICAL SYSTEN

7,1 Standard Model

A diagram of the electrical system is shown in fig-ure 1-5. The system utilizes 460V incoming powerthrough an across-the-line magnetic starter. A con-trol center, figure 1-6, contains a transformer thatproduces 115V control voltage. This reduced voltagecontrol circuit contains the on-off switch, fuse andthe various indicating lights.

to”the reservoir oil supply. fiile the oil th;t col-. .

lects on the inside of the separator is siphoned offFor.aircooled units

by the oil separator scavenger line to the compres-a starter properly sized is provided for the protec-tion of the oil cooler fan motor.

ser.This starter is

The receiver is equipped with a safety valveset at 1S0 PSIG.

connected to the compressorstarter through an in-10 terlock which insures ,thefan motor is operating

--.—— —--—---------------—-.—.—.”.-——-.—.-...=”—__ —=._.-_—r_.___...__.__=—.,____ _a._k_-r-__e.._“=_-.x.-.~“ _ __.___

iiOwmOb GWW7?MJuFcaacu

ARRANQENT FOR

\ -

WATERCOOLED UNITS

SI?LEOTOR POSH sUTTON

ARAANDEMENT FORAIR COOLEO UNITS

F*OU “ j “ I.-.---nucn Em

a w:, &PUSH 0

STANDARD SST POINTS

mcssunc WITEHmm= 110nslmull 128 RS.I.

w AIR %?fcP.00MTROL E?.S. F

$ILTER D1W. SW ,Tcll 1$ P$lgsm. Mm, WITCH ,, ●lo

NOTE 1. COMPRESSOR MOTOR STARTER COil. LEAO MUST SE OIXOSSECTEo FROM STARTSR TERMINAL NO<3 SEPOAE ATTAOIIISO10 WIRE NO, S7 [WIRE HO. 40 ON AIRCOOLED UNITS) ANO BcPC+IE CONNEOTINO WIRES NO. W a NO. 13 70 3TAR7ER TERMINAL~. 2 a NO.3

NOTS 3Y ON FLSMOTS UOWTI?O 00 MPNESSOR MOTOR STARTER, (ON WATER OIJdLEO UNITS) CUSTOMER MUST CONNEOT CONTROL

a

IELEOTON P. B. WN?S3NO. 12,N0. 13, NO.3S aN0,39, AND VENT FAN MOTOR WIRES Al, El a C I ON CERTAIN MOOELS (SEE NOTg 41ioSTAOT 3EWI!NGE NOTE 2. ON RiEtAOTE MOUNnO oOMPMSW NTOR S~RT~RS, (ON All! cOOLEO UNITS) OUSTOMER MUST GDWSSOT CONTROL wIRES

STOP RON NO.12 NO.13 a NO. 40 a PNASS WIRgS A, B, a 0, ( 8EE NOTS 4)Fast 06?. ?RaE Dee NOTE 41 OVERCURRENT PROTZOTm ( PU8gS) FOR WIRES NO: 3S a NO, 39 I WATIZROOOLEOUNITS) , WIRSS A S a O (AIROOOLgO UNITS)

$Ooxx

30XOXANO WRES Al, S1 a 01 (WA7CROOOLg0 OASINET MOOELS WITN 3 P14ASS VSN7 MOTORS) MUST SE PROVIOCO SY 0YnER3 TOCOWPLY WtTN TNE N,E. C. & OR LOOSL 000E(SO NAVINS PREOSOCNCEI S2S COA-IISO POR MAXIMUM FUSE SIZE.

Soxoo NOW! St I OR MORII OF TNCSC VALVS3 MAY SC USSO ON MOMLS 0S1-1000 , OS I* ISSO m Q $1- ISO O ONLY.

>0 %00

[0%00

Oxoo

)Ooxx WIRI NO OIAORAM

Iooxx

I* 00#74C1 0L02E0

OSI cONTINUOUS RUN 00 NTROL ( AIRSWA?ZR aoaLEo!

#

>. Wnmr,? OPEllOAW.

4.*1.1,> ~ G Ki’k :~

ControlTransformer

Fuse

ControlRelay

Figure 1-6 Control Center Illustration

12

00 HTIIOLCIRCUITTnmwonum

SENSOR 1.\

36 ARRANGEMENT FOR

SELE TOR

/L

PUS” TO TEST

SWITCH● “ 8.,. RE,F.T WATER COOLE O UNITS

i’!%--:r :-’

:- K-i--! 350 I

U4AFUSE ~

‘4I

2 \ :-j [j

POWER SUPPLY

2, , ——X1 32

+, ‘“

+-% ‘c’ 4: ‘L---=;

Oaanc” C,RC”,T

REO ~ POWER 28ON

BY cUSTOMER

00MP. MoToR

38I

42 A_

55

&---A

49 --

5 20 I I 21 r--l 29 I IT Ii ‘EE P -$=-+%%+,

! FROM-----FILTER

-l

-_lll’,3 ; j,

3+

FuSES

937 ! sEE NOTE 4

r] ,TzT,l

L----

0

--::kk--- VCII1~,~-- PAM---K& ~- “ENr FAN NOTOR

Oat ?*O rlmu *O9

(-)CcklP

MOTOR

EL.- .?— *ysE

TO vu?

ARRAWQENENT FOR

AIR COOLEO UNITS

POWER SUPPLY

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NOTE 2. ON REWOTE WOUNTEO O02hPRESSOR WDTON STARTER,( L7N WATER GOOLEO UWITS) CUSTOMER MUST CONNECT CONTROL WIRE NO. c+, NO.13 NO 3S a NO,S$,4S0 VEPAT FAN MOn WIRES $1, SI a CI ON CERTAIN MOOEL$ (SEE MOTE ●)

NOTE * ON REMOTE MCA2NTE0 COMPRESSOR UOTOFI STARTERS (ON AIROOOLEO uNITS} CUSTOMER NUST CONNEC7 CONTROL WIRES NO. let NO Ia a NO.40ANO PHASE WINSS A,E G o (SEE NoTE 4)

NoTE 4= OvEWJRRENT PROTECTION (FUSES) FOR WIRES No.3e a No.3s [ON WATERCGOLEO UNITS), WIRES &a. a c. IAIROOOLEO UNITS} ● WIRES AI, SI, a 01I WAT2NCOOLE0 CA SINET MODELS WITII 3 PHASE VENT MOTORS FAUST eE PRO VIDEO SY 0T12ERS TO CWPLY ~lTN THE N. E, C a OR LOOAL COOE [S)

RAVINO PREC60ENSE, SEE EDA I I a e FOR MAXIMUM FUSE SIZE,

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TERMINALS S 246 SE .JUNPEREO RATHER T21AN 4 a 6 OR OAMAOE TO TN(2 TIMER MAY RESULT, REFER TO SOHEMATIC ON TIMER PAOE.,“A”

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AWWN)OLEO WITS) AND SWORE CONRROTIN3 WiWES NO.12 6 NO. 18 TO STARTER TERWINAL NO. t a NO.3

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PAN MoTce WIRES * SI a 01 ON OERTASA MODSLS [SEE WOYE41Mu= O~ECT CONTROL NO. IQ, NQ13,S0.3E a w.39 a VENT

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ONTAO T SJ50UENCE CA81~T MDOELS WIYN S PHASE VSNY NO~ ) MUST aE PRO-O 3Y OTNERS TO CONPLV WIYH TNE N. C. G . a OR LOOAL ~ (S) HNIN6 ~OE

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with the compressor motor. If the fan motorstarter trips out for any reason, the compressorunit will shut clown.

7.2 Continuous Run (Standard)‘— See Figure 1-5.

Continuous Run allows the compressor to run contin-uously whether loaded or unloaded.

7.3 Automatic Dual Control (Optional)~ee Figure 1-7,

Antomatic Dual Control allows the manual selectionof continuously running or automatic start and stopoperation. Automatic start and stop operation willstop the motor if the unit runs at no load for aspecified period of time (usually 10 minutes), andstart when the pre-set pressure is reached.

7,4 Automatic Alternator (Optional)See Figure 1-8.

Mode #1. Automatically alternates two units.Mode #2. Permits unit “A” to run and unit “B” to

stand-by.Mode #3. Permits unit “B” to run and unit !!A1%to

stand-by.Mode #4. Permits unit “A” and “B” to run

continuously.

7.5 Timed Alternator Control of Two Compressors(Optional) See Figure 1-8.

Mode #1. Permits unit “A” to run for a specifiedtime interval (usually 24 hours), withunit “B” standing by to cut in if required.

Mode #2. Permits both units to mn continuously,

7.6 Three Compressors Sequencing (Optional)See Figure 1-8.

Mode #1. Permits unit “A” to run, with unit “B”as first stand-by and unit “C” as secondstand-by,

Mode #2. Permits unit “B” to run, with unit “C”as first stand-by and unit “A” as secondstand-by.

Mode #3. Permits unit “C” to run, with unit “A”as first stand-by and unit “B” as secondstand-by,

8. DESCRIPTION OF AFTERCOOLER OPTION

Aircooled and watercooled aftercoolers are availableas an option for all QSI models. They are installedbetween the compressor discharge line and theauxiliary receiver. The watercooled aftercoolersare of shell and tube design. The aircooled after-coolers are supplied with cooling air from a separ-ate motor driven fan that blows a continuous flowof air through their cellular cores. Each type ofaftercooler provides a control over moisture enter-ing the service lines, by cooling the discharge airto within 15”F., of the temperature of the coolingwater or ambient air as the case may be. A moistureseparator with moisture trap is provided for col-lecting the moisture and expelling it to the drain,

SECTION 11

INSTALLATION

1, SELECTING THE INSTALLATION SITE

Locate the compressor on a level surface, No spe-cial foundation is required. Allow at least four(4) feet of clearance on all sides of the compres-sor to facilitate maintenance, as.well as for freecirculation of air.

2. MOVING THE UNIT TO THE INSTALLATION SITE

If a fork lift is used to move the unit to its in-stallation site, be sure that the weight of the unitis well distributed on the forks. Use of chains andslings should be limited to the main frame. Do notattempt to lift the unit by the shipping crate.

3. UNCIUTING THE UNIT

Inspect the compressor for any visible damage whichmay have occurred in shipment. If visible damageis found at the time of delivery, be sure a notationis made on the freight bill by the deliveringcarrier and request a damage report. If the ship-ment is accepted and it is later found that the com-pressor unit has been damaged, this is classified asconcealed damage. If concealed damage is found, re-port it within 15 days of delivery to the deliveringcarrier, who must prepare a damage report, Itemizedsupporting papers are essential to filing a claim+

4. ELECTRICAL FACILITIES AT THE INSTALLATION SITE

Power supply and wiring must be adequate and compar-able with the requirements of the unit. The wiringshould be done by a competent electrician in accordante with the unit wiring diagram, the nationalelectrical code, state, city or any other applicableelectrical codes. Wiring diagrams are enclosed witheach compressor unit. The compressor should be wellgrounded in accordance with the national electricalcode and any other applicable codes. Starters notsupplied with the compressor (aircooledmodels only)must be provided with a fan motor interlock,

5. WATER AND SEWER FACILITIES AT THE INSTALLATIONSITE (WATERCOOLEDMODELS ONLY)

Make sure that the water supply is connected andopen. Piping supplied by the user should be atleast equal to the connections provided on the com-pressor, For long runs of piping or low pressurehead, consult the factory. Sewer facilities shouldbe readily accessible to the installation site andmeet all the requirements of local sewer codes.

6, COUPLING ALIGNMENT

It is necessary to check the coupling alignment af-ter the unit has been installed and before its ini-tial start-up, to insure that no mis-alignment hasoccurred during shipment.

Two types of couplingsare used on various models of Quincy QSI Series AirCompressors (see figure 2-1.), The alignment testprocedures are similiar for each with certain dif-ferences in the area of assembling and disassemblingthe elements and locking the two hubs together tomake the dial indicator check,

6.1 Element Assembly and DisassemblyYPe Couplmq

Remove the coupling guard and place a proper sizedradiator hose clamp around the rubber element of thecoupling and tighten. Once this clamp has been in-stalled around the element, it should not be removeduntil final assembly of the element to the hubs. If

15 this clamp is removed before final assembly, the

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Type 1 Coupling Type 2 Coupling

Figure 2-1

element will expand, making installation very dif- then tap the element slightly with a rubber malletficult if not impossible. to assist in seating the-element tab into the key-

After the radiator hose stone slot. Finally tighten each bolt with a torqueclamu has been installed, remove the six (6) hex wrench to the torque s~ecification shown in fimrehead-bolts from the hub tabs and element. Rotatethe rubber element counterclockwise until its studwill clear the hub, then lift out.

To reassemble,reverse the disassembly procedure and tighten allbolts to the toraue specified in figure 2-2. Dueto space limitat<ons,- it is desirabie to use a

-..racheting type rather than a sight reading typeorque wrench.

6,2 Element Assembly and DisassemblyType 2 Coupling

To disassemble the Type 2 Coupling, remove the hexhead cap screws from the element by partially un-screwing one at a time until all have been removed,then lift out the element.

To reassemble the ele-ment, start with the two split ends, inserted in akeystone slot of the hub. Insert the bolt but donot tighten. Proceed with the remaining bolts inthe same fashion, tightening each of the bolts un-til they appear to be drawing the element in the hub

.2-2.

6,3 Preparation of Hubs for Alignment CheckType Coupling

Lock the two hubs together so they can both be

:ecuring the Hubs Type 1 Coupling

comPressor

Motor

Figure 2-3

I Drive Coupling SpecificationsI

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STANDARD BORE SIZE MAXIMUM ALLOWABLE ELEMENT BOAT

QUINCY MODEL COUPLING ~ MOTOR HUB SHAFT MIS-ALIGNMENT TORQUE INTYPE HUB HUB SEPARATION SEPARATION PARALLEL ANGULAR FOOT POUNDS

QSI-235A OR TYPE 1. 1-7/8” 1-11/16” 2-7/16” 3,! .008!’QSI-235W

.005” 75TYPE 2. 1-7/8” 1-11/16” 2-3/8” 3,, .010” ‘ ,004” 25

QSI-350A OR TYPE 1 1-7/8” 1-11/16” 2-11/16” 31! .010” .005” 150QSI-350W TYPE 2 1-7/8” 1-11/16” 2-318” 311 .010” .004” 25

QSI-490A OR TYPE 1 2-1/8” 2-11/16” 3,, 3,, .010”QSI-490W

005” 250TYPE 2 2–1/8” 2-11/16” ~!, 3tr .012” :004 65

QSI-740A OR TYPE 1 2-3/8” 2-11/16” 311 7jlt .010” .005” 300QSI-740W TYPE 2 2-3/8” 2-11/16” ~lt zj!t .012” .004” 65

- .QSI-1OOOA OR TYPE 1 2-3/8” 3-5/16” 4-3/32” 4-1/8” .010” .005” 260QSI-1OOOW TYPE 2 2-3/8” 3-5/16” 4-1/8” 4-1/8” .01’21’ .004” 110

QSI-1250A OR TYPE 1 2-3/8” 3-5/16” 4–3/32” 4-1/8” .010” .005” 260QSI-1250W TYPE 2 2-318’ ‘ 3-5/16” 4-1/8” 4-1/8” .012” .0041’ 110

QSI-1500A OR TYPE 1 2-3/8’ ‘ 3-5/16” 4-3132” 4-1/8” .010” .0051’ 260QSI-1500W TYPE 2 2-3/8’ ‘ 3-5/16” 4-1/8” 4-1/8” .012” .004” 110

m

Figure 2-2 16

rotated through 360°. The hubs can be locked to-gether by using a bolt smaller than the one removedfrom the element and with two lock nuts. Assembleas shown in figure 2-3.

6.4 Preparation of Hubs fOr Alignment CheckYPe Coupllng

Lock the two hubs together so that they can both berotated through 360°, with a piece of strap iron ofa width that will fit into the keystone slot of thehub and with a hole drilled in one end to fasten itsolidly to one hub. See figure 2-4,

securing the Hubs Type 2 Coupling

comPressor

Figure 2-4

6.5 Coupling Hub Separation TestYPes cOupllngs

Remove the coupling guard and the coupling element.Measure the distance between the inside faces of thetwo hubs, see figure 2-5, Compare this measurementto the coupling specifications shown in figure 2-2.

If the hub separation measurement does not agreewith the coupling specification chart, figure 2-2,loosen the hub set screw and make whatever adjust-ments are necessary to make the hub separatio;coincide. After the adjustment is made, tightenthe set screw.

Hub Separation Measurement

Figure 2-5

Motor

6.6 An ular Mis-Ali nment Test*es 1 ~ 2 Co$lings

Lock the two hubs together so that they can be ro-tated through 360°, see figure 2-3 01 2-4. Attacha “C” clamp type dial indicator holder to one of

Dial Indicator Set-Up for AngularMis-Alignment Test

comPressor

Motor

17

-thehubs as shown in figure 2-6. Set the dial in-dicator at zero then rotate the coupling through360° and indicate on the inner surface of the op-posite hub the angular misalignment. Compare.thereading from the dial indicator with the maximumallowable mis-alignment shown in figure 2-2, coup-ling specification chart, If the dial indicatorreading exceeds the maximum allowable mis-alignment -shown in figure 2-2, move the compressor and~ormotor by adding or deleting shims until alignmentis achieved.

6.7 Parallel Mis-AlignnlentTestYPes and Coupllngs

Lock the two hubs together so that they can be ro-tated through 360°, see figures 2-3 or 2-4, Attacha “C” clamp dial indicator holder with dial indica-tor attached, to one of the hubs as shown in figure2-7. Set the dial indicator at zero? then indicateon the outer surface of the opposite hub, the paral-lel mis-alignment,

Compare the reading from thedial indicator with the maximum allowable parallelmis-alignment shown in figure 2-2. If the dial in-dicator reading exceeds the maximti allowable mis-alignment, move the compressor and/or motor byadding or deleting shims until alignment is achieved

After parallel alignment adjustments have been made,it is necessary to recheck the angular alignmentto be sure that no changes have occured.

Dial Indicator Set-Up for ParallelMis-Alignment Test

comPressor

Motor

I7. OIL LEVEL CHECK

The re$eiver/reservoiris filled at the factory withthe correct amount of compressor oil. The oil levelgauge should read as shown in figure 2-8, when theunit is stopped. For lubricating oil specificationssee Section IV.of this manual,

Oil Level Gauge

Figure 2-8

8. COMPRESSOR ROTATION CHECK

Check for proper rotation by momentarily starting ~and stopping the motor. The compressor rotationshould be clockwise as seen from a position facingthe drive end of the compressor. The drive endof the compressor is marked with an arrow indica-ting the proper rotation. See figure 2-9 on thefollowing page.

Compressor Rotation

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Presso 3

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9. FAN ROTATION CHECK

At the time the compressor is being checked for

SECTION III

OPERATINGPROCEDURES

1. CONTROLS AND INDICATORS (STANDARD UNITS)

The instrument panel illustrated in figure 3-1 showsthe location of each of the gauges, indicator light%switches and the hourmeter, The basic function ofeach of the instruments is as follows:

1.1 Com~ressor Control Switch

The compressor control switch has a dual function.First, to test the operation of the warning lightsand control circuits, second to start the unit,The switch is actuated for each function in accord-proper rotation, al;o check the fa; rotation. Fan

air flow should be outward.ante with the illustration in figure 3-2.

Air Filter ReservoirService Indicator -

Oil InletPressure Gauge ~ Temperature

\ ~- Gauge

% CapacityGauge ‘~_

Compressor Discharge— Air Temperature Gauge

Power-OnLight

Compressor ControlSwitch

Oil Separator

High Air Temperature/Shutdown Indicator

Light

~ Hourmeter

T.T...Oil Filter

Service Light 1

I

\ Service Light

Auto Dual Control Test Switch(Optional)

Figure 3-1

IIIN OFF POSITION PUSH TO TESTI IN ON PoSITION PUSH TO START

Figure 3-2 Compressor Control Switch 18

Control Panel

1.2 Hourmeter

The hourmeter records the actual running time ofthe unit and is used to determine servi=e intervalsfor the various components of the unit.

1.3 Air Intake Filter Service Indicator

The air intake filter service indicator shows inred when it is time to clean or replace the filterelement.

1.4 Red Compressor Oil Filter Service Light

When the red warning light is lit it is an indica-tion that the oil filter is in need of service.The compressor should be shut down and the oilfilter serviced.

1.5 Red Oil Separator Service Light

~lhen this red warning light is lit, it is an indi-

cation that the oil separator is in need of servi-cing . The compressor should be immediately shut downand the oil separator serviced. A blinking red lightmay be experienced during start-up until the com-pressor oil reaches its operating temperature.

1.6 Red High Discharge Air Temperature Indicator

Q@.!The high air temperature shut down light is red andwhen lighted, indicates that the discharge air tem-perature exceeds 225”F., and that the compressorshut down for that reason.

1.7 Amber Power-On Light

When the power-on light is lit it indicates that themain power exists at the starter, the compressor con-trol switch and the power-on light.

1.8 Compressor Discharge Temperature Gauge

When the compressor is running at full load, thecompressor discharge temperature gauge should readwithin the range of 160°F and 200”F.

1,9 Oil Inlet Temperature Gauge

The temperature of the oil at the oil injection areaof the compressor should be 140°F to 150°F. Thistemperature is read at the oil inlet temperaturegauge located on the instrument panel.

1,10 % Capacity Gauge

The capacity gauge is calibrated in percent of totalcapacity of the unit. Readings taken from thisgauge give an indication of the amount of airactually being delivered.

1.11 Reservoir Pressure Gauge

The receiver/reservoir pressure gauge should read noless than 40 PSIG when the unit is delivering fullcapacity, and not to exceed 125 PSIG, for 110 PSIGmaximum operating pressure units and 140 PSIG for125 PSIG maximum operating pressure units.

2. ADJUSTMENTS

2.1 Water Temperature Regulating Valves

The water temperature regulating valve is factoryset to maintain 140”F oil iniection temperature asshown by the oil inlet temperature gaug~.

Water Tempe rature Regulating Valves

AdjustmentScrew.-

Type #1 Type #2

Figure 3-3

Two types of water temperature regulating valvesare currently being used as shown in figure 3-3.

Type #l, is adjusted as follows:To decrease water flow and increase oil inlet

temperature, turn the adjusting screw clockwise.To increase the water flow and decrease oil inlet

temperature, turn the adjusting screw counterclock-wise.

Type #2, is adjusted as follows:The adjustment of the control setting point for

type #2 valve is made by turning the large adjust-ment screw up or down as required, using a 5/16”open end wrench over the lugs provided. The fig-ures on the scale to the right of the adjustmentscrew are for reference and represent the approxi-mate location of the setting point within therange of the regulator. The groove on the 4 lugson the lower portion of the adjusting screw areused as a reference mark to line up with the lineson the scale.

To decrease water flow and increase oil inlettemperature , turn the adjustment screw from leftto right, increasing spring tension.

To increase water flow and increase oil inlettemperature, turn the adjustment screw from rightto left, decreasing spring tension.

2.2 Capacity Modulation Adjustment

To adjust the receiver pressure from its standardfactory setting of 110 PSIG or 125 PSIG as the casemay be, first determine the full load operatingpressure desired and proceed as follows:

To increase the full load pressure:

A.Observe the percent capacity gauge and determinewhether there is any unused capacity (see figure3-4). If the machine is being used at full capa-city no further adjustment is possible.

B.If the machine is not being used to full capacitythen proceed to loosen the lock nut on the dif-ferential pilot valve and screw the adjusting screwin, toward the body of the valve, until the desiredDressure is attained on the receiver ~ressure ~au~ebr until 100% capacity is attained on-the perc;nt-capacity gauge, whichever occurs first. Tightenth~ diffe;en;ial pilot adjusting screw lock-nut.

Percent Capacity

DifferentialPilot Valve

Lock !{ut~

Adjusting—Screw

19 Figure 3-4

To decrease the full load pressure:

A.Loosen the differential pilot adjusting screwlock nut and screw the adjusting screw out awayfrom the body of the pilot until the desired fullload receiver t)ressure is reached. If the desiredfull load receiver pressure uses less than 20% ofthe capacity of the machine, it is necessary to‘educe the cut-out pressure of the pressure switch) that the compressor will run in the blowndown or

.nloaded cycle.

Pressure Switches

~~ Adjus

AdjustingNut

,ting Nut

Type #2

AdjustingScrews

Type #3

2.3 Pressure Switches and Adjustment

Pressure switches are factory set for 110 PSI cut-into 12S PSI cut-in pressure. If other settings aredesired, adjust the cut-out pressure to 15 PSI overthe desired full load pressure. The range adjustme~on Type #l and Type #2 pressure switches (see figure3-5) is made by turning the large center adjustingnut clockwise to increase the cut-in/cut-out pres-sure and counterclockwise to decrease the cut-in/cut-out pressure. The range adjustment for Type #3pressure switch is made by turning the pressure ad-justing screw clockwise (as seen from a positionfacing the terminal end of the switch) to increase,and counterclockwise to decrease the cut-in/cut-outpressure. When the cut-in/cut-out pressure is ad-justed, a small change will be noted in the overalldifferential . Usually this is insignificant.

3. INITIAL START-UP PROCEDURE

Before starting the unit, review sections II & IIIof this manual, and be certain that all installationrequirements have been met and that the purpose anduse of each of the controls, warnings and gauges,are thoroughly understood, Make a final check inaccordance with the compressor start-up chart below.

4. COMPRESSOR START-UP CHART

heck Inspection or Operation ManualReference

1. Remove all installation toolsfrom the compressor and policethe area for shipping andinstallation debris.

2, Check the coupling for possible II-6misalignment.

3, Check oil level. II-7

4. Close the main power sourcedisconnect switch.

5. Push the test button to check III-1that all control circuits areoperative.

6. Jog the “RUN” button allowing the 11-8~9unit to turn over a few revolu-tions . Check for freedom of move-ment and rotation. The compressorshould rotate in a clockwise dir-ection as seen from a positionfacing the input shaft and in ac-cordance with the arrow stampedon the end plate.

7. Permit the unit to warm up, then III-1check the oil injection tempera-ture. It should read 140”F to150”F.

8. The receiver pressure gauge III-1should read no less than 40 PSIGwhen the unit is delivering fullcapacity and not to exceed 125PSI for the 110 PSI.Gmaximumoperating pressure units or 140PSIG maximum operating pressureunits .

9. Adjust the water temperature reg- 111-1ulating valve to maintain 140°Fto 150”F oil injection tempera-ture (watercooled units only).

Figure 3-5 20

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SECTION W

PREVENTIVEMAINTENANCE

1. DEFINITION OF PREVENTIVE MAINTENANCE

Preventive maintenance on the Quincy QSI SeriesHelical Syre~ Compr~s:or Unit consists of lubrica-tion perxodlc servlclng and adjusting. The com-

pressor unit comprises several components andsystems which require periodic attention to assurethat the unit will operate reliably. Failure toperform the preventive maintenance instructionsdescribed in this section can greatly reduce servicelife of the equipment.

CAUTION:! Service or repair the unit only afterdisconnecting the main power switch.

2. LUBRICATION

Each unit has a float-type liquid oil level gauge, incombinationwith an 011 filler opening, located on theside of the receiver/reservoir. Oil should be changedafter the first one thousand [1000) hours of oDerationto make sure that the initial-contaminantsin %hesystem are removed. After that, the oil should bechanged at every two thousand (2000) hours,

Changethe oil filter elements, under any of the followingconditions,whichever occurs first:(a) As indicated by the oil filter warning light

located on the instrument panel.(b) Every six (6) months,(c) Every two thousand (2000) hours of operation.(d) Every oil change.

3, OIL SPECIFICATIONSCompressor oil should conform to one of the followingspecifications for oils{(a) MTL-2104B - SAE 20 Viscosity.(b) API Service CC or CD - SAE 20 Viscosity.

If the use of a synthetic lubricant is required,consult the factory for specific recommendations.

All compressor units shipped from the factory havea tag attached to the compressor receiver/reservoirfiller plug, indicating the type of oil the compres-so-rwas shipped with. Consult the ‘tagbefore addingFi~ure 4-1

oil to be sure that the oil being added is the sameas that in the unit.

WARNING!! Under no circumstances should oils oftwo different specificationsbe mixed.

See figure 4-1 for receiver/reservoiroil capacities

The electric motor should be lubricated in accord-ance with its manufacturers recommendations.

4, AIR INTAKE SYSTEM

Servicing the air intake filter element depends onthe environmental conditions under which the com-pressor unit is operating. The air intake filterelement should be serviced under any of the fol-lowing conditions, whichever occurs first:(a) As indicated by the air intake filter

maintenance indicator.(b) Every six (6) months,(c) Every one thousand (1000) hours of operation,

The filter element can be cleaned by washing in awarm water solution of household detergent. Dis-card the element after a maximum of six (6) wash-ings. Keep a spare filter element on hand to keepmachine down time to a minimum. Some units haveair intake filters equipped with a regular elementand a safety element. The safety element requireschaneine once a year. Discard the used safetvelem&t”as they ire not reusable.

5,

Thethe(a)

(b)(c)(d)

6.

AIR/OIL SEPARATOR

air/oil separator must be changed under any offollowing conditions, whichever occurs first:As indicated by the separator warning light,Once a year.Every four thousand (4000) hours of operation.When excessive oil appears in the service lineas a result of a faulty separator (holes, etc.].

SCAVENGER LINE AND ORIFICE

Clean the scavenger line filter screen and orificewhen no oil is visible through the sight glass, orevery two thousand (2000) hours of operation,whichever occurs first,

7, CONTROL AIR LINE FILTER

Condensate collected in the bowl should be period-ically drained. Excessive condensate build up inthe bowl could adversely affect the performance ofthe ca~acity control system.

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//-(Full--- - - -- -- -- - . -— - - --- - --- --— - ---. - -- - - --- -

@Aw - - - - . - - - - - - - -----

W?!x?

Nominal Dimensions Oil Capacity in Gallons

Model Receiver [Inches) $Type Ful1 Add t Between

!,*!,, ,!,,B ?-ull & Ad<

QSI-235 1 27.2 ‘29.7 7,75 5.57 2.18

QSI-350 1 26,9 -30.4 15.8 11.0 4.80

I Full- - . -- .- - -- - - Pl

I QSI-490 I 1I

26.4 -29.9 21.6

Type 1I

14.7[

6.90

QSI-740 1 37.1 I 40.6 I 33.9 23.2 10,7r I

QSI-1OOO 2 40,7 44,2 40.0 22.8 17.2

QSI Air Receiver/Oil Reservoir Capacities QSI-1250 2 42.8{

4.6.3 SO.o 29.6 20.4

QSI-1500I

2 42.8 46.3 So.o 29,6 20.4

21

—

SECTIONvTROUBLESHOOTING

FAILURE TO START

Probable Cause Correction

Power not turned “ON”. Turn the power “ON” by closing the main disconnect switch orcircuit breaker.

Blown control circuit fuse. Replace fuse.

Safety circuit shutdown resulting Correct’ the siiuation in accordance with the instructions in thefrom high discharge air temper- “High Discharge Air Temperature and/or High Oil Injection Temp-ature. erature” section of this trouble shooting guide, then press the

reset button on the High Discharge Temperature Switch and restar’the compressor.

rhermal overload relays Correct the cause of the overloaded condition and press thetripping. starter reset button.

-OW voltage, Ask the power company to make a voltage check at your entrancemeter, then compare that reading to a reading taken at the motorterminals. Use these two readings as a basis for locating thesource of low voltage.

Faulty start switch. Check the switch for malfunction or loose, connections.

Power failure. Check power supply.

UNSCHEDULED SHUTDOWN

iigh air discharge temperature. Correct the situation in accordance with the instructions in the“High Discharge Air Temperature and/or High Oil Injection Temp-erature” section of this trouble shooting guide, then press themanual reset button on the high discharge air temperature shut-down switch. Restart the compressor.

Thermal overload relays Correct the cause of the overloaded condition and press thetripping. starter reset button.

Power failure. Check power supply.

LOW RECEIVER PRESSURE

Excessive air demand. Reevaluate air demand.

Excessive leaks in service lines. Check service lines for leaks with soap suds.

Inlet valve not fully open. Correct the situation in accordance with the instructions in“Inlet Valve Not Opening Or Closing In Relation To Air Demand”section of this trouble shooting guide.

Plugged air intake filter. Clean air filter element or replace with new element.

Differential pressure regulator Readjust differential pressure regulator to achieve desirednot Set correctly. modulation range.

Air pressure switch not set Readjust the air pressure switch to the desire~ cut-in andcorrectly. cut-out pressure,

Faulty receiver pressure gauge. Check and if found faulty, replace it.

HIGH RECEIVER PRESSURE

Air pressure switch not set Readjust the air pressure switch so that the unload pressure doe:correctly. not exceed the maximum recommended operating pressure.

Inlet Valve not closing atlower air demands.

Correct the situation in accordance with the instructions in“Inlet Valve Not Opening Or Closing In Relation To Air Demand”section of this trouble shooting guide.

Blowdown valve not releiving Check the wiring and solenoid valve. If the solenoid valve isreceiver pressure. found to be faulty, replace it.

22— .. .....- ---------—. ..._...<......-_,=_.L.=............—,____ .——. ----

HIGH DISCHARGE AIR TEMPERATURE AND/OR HIGH OIL INJECTION TEMPERATURE

Not enough cooling water flowing Check water system for possible restrictions, including waterthrough cooler (watercooled temperature regulating valve.models only).

Inadequate circulation of cooling Check the ‘location of the cooler to make sure that there is noair at the cooler (aircooled restriction to free circulation of cooling air. Also check finsmodels only). at the cooler and if found dust laden, clean them with air while

the machine is not running.

Low oil level in the reservoir. Add oil and bring oil level to recommended level. Also checkthe oil system for possible leaks.

Clogged oil filter. Replace oil filter element(s),

Clogged oil cooler. Check oil cooler for varnishing and rust deposits. If thiscondition exists, then clean cooler thoroughly in accordancewith recommended procedures.

)il pump failure. Replace oil pump.

LOW AIR DELIVERY

~lugged air intake filter element .Clean air filter elements(s) or replace with new element(s).

:xcessive leaks in the service Check service lines for leaks with soap suds,lines.

Inlet valve not opening fully. Correct the situation in accordance with the instructions in“Inlet Valve Not Opening Or Closing In Relation To Air Demand”section of this trouble shooting guide.

SAFETY VALVE BLOWS

differential pressure regulator Readjust differential pressure regulator to obtain desired~ot set correctly. modulation range.

\ir pressure switch not set Readjust air pressure switch so that the compressor unloads at:orrectly. the desired pressure.

\ir inlet valve not closing Correct the situation in accordance with the instructions in]roperly in relation to air “Inlet Valve Not Opening Or Closing In Relation To Air Demand”iemand. section of this trouble shooting guide.

Jlugged separator. Replace with new air/oil separator.

‘aulty receiver pressure gauge, Check gauge for accuracy.

‘aulty safety valve, Check safety valve for correct pressure setting. If valve issti~l leaking, replace tt.

EXCESSIVE OIL CONSUMPTION

roo high oil level in the Bring the oil level down to the recommended level by draining“eceiver, the receiver. Use the oil level gauge as a guide.

~lugged scavenger line, Clean scavenger line orifice, filter and tube.

iigh oil injection temperature. Correct the situation in accordance with the instructions in“High Discharge Air Temperature And/Or High Oil Injection Temp-erature” section of this trouble shooting guide.

[mproper adjustment of scavenger Adjust the scavenger line so that it touches the bottom of theline. separator, then raise it 1/8”.

’00 low receiver pressure, Receiver pressure should not fall below 40 PSIG when runningloaded. If it does, consult factory.

‘aulty or damaged separator, Change a~r/oil separator.

.eak in oil line, Check for leaks and correct./

Seal failure. Replace necessary component of the seal or the complete sealas deemed necessary.

Cycling too often between load Correct the situation in accordance with the instructions inand unload. “Too Rapid Cycling Between Load and Unload” section of this

trouble shooting guide.

23

,---

.

-..

FREQUENT AIR/OIL SEPARATOR CLOGGING

Faulty air filter or inadequate If faulty air filter element(s), replace them. If air filter i!filter for the environment. inadequate for the environment, replace it with a heavy duty

filter.

Faulty oil filter(s). Replace oil filter element(s).

Oil breakdown. Correct the situation in accordance with the instructions in“Oil Breakdown” section of this troubleshooting guide.

OIL BREAKDOWN

Extreme operating conditions such Operate compressor at recommended receiver pressure and oilas high oil injection and compres-sor temperatures, high ambient

injection temperature.

temperature with high humidityand high reciever pressure.

Contaminated oil. Service air filter element and oil filter element promptly inaccordance with the recommended maintenance schedule.

Negligence in draining condensate Drain condensate from the receiver periodically. More frequentfrom the receiver. draining might be necessary when operating in high ambient

temperatures and high humidity environments.

liixing different brands of oil. DO NOT MIX DIFFERENT BRANDS OF OIL!!—— — — .—

Jse of wrong oil. Follow compressor oil specifications as described in section IVof this instruction manual.

OIL COMING OUT THROUGH THE AIR CLEANER AT SHUTDOWN

Inlet valve not closing Correct the situation in accordance with the instructions incompletely. “Inlet Valve Not Opening Or Closing In Relation To Air Demand”

section of this trouble shooting guide.

Faulty discharge check valve. Inspect check valve. If necessary replace it.

Leakage through oil pump. Replace oil pump,

OIL COMING OUT THROUGH THE BLOW DOWN VALVE

I’oohigh oil level in the Bring oil level to recommended oil level by draining thereceiver. receiver. Use the oil level gauge as a guide.

Cycling too often between load Correct the situation in accordance with the instructions in~nd unload, “TOO Rapid Cycling Between Load And Unload” section of this

troubleshooting guide.

I’oofast blowdown. Check for proper blow down valve size.

TOO FREQUENT AIR CLEANER CLOGGING

:ompressor operating in highly Use remote air intake mounting.contaminated atmosphere,

!ir cleaner not adequate for Use heavy duty air cleaner.:onditions,

INLET VALVE NOT OPENING OR CLOSING IN RELATION TO AIR DEMAND

[mproper functioning of the Check setting, Make sure that vent hole and orifice in the>ressure regulator. seat of the regulator are not plugged. Service the control

air, line filter.

[mproper setting of air pressure Readjust air pressure switch to proper setting. If switch is;witch or faulty switch. faulty, replace it.

ixcessive moisture in the control Service control air line filter regularly. Try to avoid making~ir line at the air cylinder. connection at air cylinder at low point in the control air line,

[mproper functioning of air Check air cylinder assembly. Replace faulty component or:ylinder. complete assembly as deemed necessary.

lammed air inlet valve assembly. Check air inlet valve assembly.

24

.-., .- ..- .. .... ... ... . .

COMPRESSOR DOES NOT UNLOAD WHEN THERE IS NO AIR DEMAND

Air pressure switch not set Readjust air pressure switch,correctly.

Pressure regulator on unload Readjust regulator for proper setting.line not set correctly.

Faulty solenoid valve. Check wiring and solenoid valve.

Faulty air pressure switch.(Replace air pressure switch.

Leaks in service lines. Check for leaks with soap suds solution.

COMPRESSOR DOES NOT REVERT TO LOAD WHEN SERVICE LINEPRESSURE DROPS TO LOW LIMIT OF MODULATION RANGE. 1

Air pressure switch not set Readjust air pressure switch.correctly.

Orifice at differential pressure Clean orifice.regulator plugged, not permit-ting release of pressure in con-trol line at air cylinder.

Air inlet valve stuck in Check air inlet valve assembly.closed position.

Faulty air pressure switch. I Replace air pressure switch. I

Faulty solenoid valve. Check wiring and solenoid valve.

TOO RAPID CYCLING BETWEEN LOAD AND UNLOAD

Too small volume in service Provide sufficient volume,line.

Unload pressure setting at the Set air pressure switch and differential air pressure regulatorair pressure switch too close in,to provide sufficient range between the pressure at which modu-relation to the setting of the la’tion starts and the pressure at which compressor unloads.differential pressure regulator.

Cut-in and cut-out pressures Readjust the cut-in and cut-out pressure settings,set too close at the air pres-sure switch.

2s

2. OIL SEAL ASSEMBLYSECTION VI

ASSEMBLY’AND DISASSEMBLYOF COMMON WEARING PARTS1. OIL SEAL DISASSEMBLY >

Uniformly unscrew the four (4) cap screws holdingthe seal adapter to the inlet casing and lift outthe seal adapter with lapped seal seat attached.See figure 6~1,

Spring Holder

Spring \

Seal Seat“O” Ring \\

The seal as~embly is a precision part requiringgreat care zn handling. Do not let the carbonwasher drop or fall. Take care not to scratch thelapped faces of the caiWEiw=eF%r=e seal SZ.

Oil the outer surface of the seal seat “o” ring(never use ~rease) and t)ushthe seal seat. with‘O” ring, i;to th; seal-adapter. Seat it’squarelyand firmly.

——

Place the spring holder on the shaftand push it down on the input shaft bearing, theninstall the st)rin~. Oil the rubber bellows andcarbon washer; an~ carefully slide them along theshaft far enough to center on the snrin~..-

Oil the“O” ring on the outside of the oil seal adapter andPush the adavter with seal seat on the shaft bvhand, until-the seal seat contacts the carbon-seal.Install two (2) all-thread studs with nuts at OPPo-site corners of the seal adapter and uniformlytighten the nuts, being careful not to cock, crackor scratch the carbon seal or seal seat. Tightenuntil the spring is compressed, then install twocap screws in the two opposite unoccupied holesand snug up. Remove the two all-thread studs andinstall the remaining two cap screws, Uniformlytighten all four (4] of the cap screws,

Figure 6-1 Seal Assembly

26

SECTION VII

SAFETYPRECAUTIONSAir compressors are precision high speed pieces ofmechanical equipment requiring prudence and cautionin operation, to minimize hazard to property andpersonnel.

There are many obvious”safety rulesthat must be observed in the operation of this typeof equipment. We list below some additional safetyprecautions that must be observed.

1.

2.

3.

4.

s.

6.

7.

8,

9.

Turn off the main power disconnect switch beforeattempting to work or perform any maintenanceon the unit.

Do not attempt to service any part of the unitwhile the unit is running.

Relieve the system of all pressure beforeattempting to remove any parts from the unit,

Do not operate the unit with any of its safetyguards, shields or screens removed.

Do not remove any safety guards, shields orscreens while the unit is in operation.

Use of compressed air produced by oil floodedhelical screw air compressors is not recommendedfor breathing purposes.

Periodically check all safety valves for properoperation.

Do not place a shut-off valve in the compressordischarge line, without first installing asafety valve of proper size and design betweensuch shut-off valve and the compressor.

Be sure that all tools, shipping and installationdebris has been removed from the compressorand its installation site before the com~ressoris started up.

10.

11.

12,

13,

14.

15.

16.

The

Do not use flammable solvents for cleaningthe air inlet filter and filter element.

Do not operate the compressor in areas wherethere is possibility of the compressor ingestingtoxic or flammable fumes or vapors.

Consult the table of specifications in thefront of this manual for maximum pressuresand speeds, Check the unit and do notoperate in excess of these maximums.

Do not operate the compressor in excess of theworking pressure limits of the A.S.M.E. ratingof the receiver.

Make a general overall inspection of the unitdaily and correct any unsafe situationsencountered.

Compare terminal pressure gauge reading withthe instrument panel receiver pressure gaugeand reconcile any differences.

“Horseplay” of any kind involving compressedair is dangerous and can cause very seriousinjury to the participants.

owner, lessor or operator of any compressorunit manufactured by Quincy Compressor Division,a division of the Colt Industries O~eratin~ CorD.is hereby warned that failure to ob;erve t~e ‘-above Safety Precautions may result in seriousinjury to personnel and/or damage to property.

Quincy Compressor Division, a division of the ColtIndustries Operating Corp, neither states as fact,nor in any way implies that the above list of safetyprecautions is an all inclusive list, the observanceof which will prevent all damage to property orinjury to personnel.

COMMON SENSE SAFETY PRECAUTIONSMUST BE OBSERVED!

AIR FROM THIS COMPRESSORMUST NOT BE USED FOR FOODPROCESMNG OR BREATHINGWITHOUTADEQUATE FILTERING.

27

NATIONWIDESALES & SERVICE

Quincy Service is always near.There are Authorized GWincy Distributors locatedthroughout the United States & Canada that stock

genuine Quincy parts& accessories for a widerange of Quincy products.

Quincy Service specialists are factory trained andwill help keep you in business. Call for Authorized

Quincy Service.

For reciprocatingand natural gas engine driven

helical screw products:call 1-217-222-7700

or fax requests to 1-800-219-9126

For all other helical screw products:ca// 1-334-937-5900

or fax requeststo1-800-219-91 31

QuincyCompressor Division

Coltsc Industries

@

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