Installation Instructions

1

INSTALLATION INSTRUCTIONS

AIR CONDITIONING & HEAT PUMP INDOOR COILS

ALL SWEAT CONNECT COILS ARE SHIPPED FROM THE FACTORYPRESSURIZED WITH NITROGEN. THEY DO NOT CONTAIN ANY

HCFC22. ALL QUICK CONNECT COILS ARE SHIPPED WITH A HCFC22HOLDING CHARGE.

CAUTION! NOTE!

VEXAR COILS AND OTHER ACCESSORIES INSTALLED WHEN AIRCONDITIONING IS ADDED TO MANUFACTURED HOUSING FURNACES

WILL COMPLY TO HUD REGULATIONS REQUIRING THIRD PARTYAPPROVALS. EFFICIENCY AND CAPACITY RATINGS AS REQUIRED BY

HUD ARE LISTED IN CURRENT AHRI DIRECTORY FOR VEXAR MATCHEDWITH OUTDOOR UNITS. THESE COIL RATINGS ARE BASED ON AIR

QUANITIES CONSISTENT WITH THOSE THAT ARE ENCOUNTERED INTYPICAL MANUFACTURED HOUSING AIR CONDITIONING

APPLICATIONS.

SOME VEXAR COILS COME WITH A TXV AS THE METERING DEVICE.HOWEVER, THE SENSOR BULB IS NOT MOUNTED DUE TO POTENTIAL

HEAT DAMAGE AND/OR PROPER BULB LOCATION. THEREFORE,AFTER THE SUCTION AND LIQUID LINE HAVE BEEN PROPERLY

CONNECTED TO THE COIL THE BULB CAN NOW BE MOUNTED ON THESUCTION LINE. MANY TIMES, DUE TO SPACE LIMITATIONS IN

MANUFACTURED HOUSING APPLICATIONS IT WILL REQUIRE THESENSOR BULB TO BE MOUNTED VERTICALLY. IF THAT IS THE

CASE THE BULB SHOULD BE LOCATED AT LEAST 6” AWAY FROMANY BEND (ELBOW) AND FASTENED ON THE TUBING SIDE

OPPOSITE THE PLANE OF THE BEND. THE BULB SHOULD BEINSULATED USING THERMAL INSULATION TO PROTECT IT FROM THE

EFFECTS OF THE SURROUNDING AMBIENT TEMPERATURE.(SEE PAGE 5)

ATTENTION!

INTRODUCTION

These instructions are prim arily in tended to assist qualified ind ividuals tra ined and experienced in the proper insta lla tion of th is type of equipm ent. Som e state codes require insta lla tion and service personnel to be licensed. Refer to authorities having jurisd iction for additional gu idance. Rem em ber that the C lean A ir Act of 1990 requires technic ian certification for handling refrigerant. NOTE: EFFICIENCY AND CAPACITY RATINGS ARE LISTED IN CURRENT AHRI UNITARY DIRECTORY FOR VEXAR COIL MODEL NUMBERS MATCHED WITH OUTDOOR CONDENSING OR HEAT PUMP UNITS. AIR CONDITIONING COIL MATCHES ARE LISTED IN INDOOR UNIT MANUFACTURER AIR CONDITIONING SECTION. HEAT PUMP COIL MATCHES ARE LISTED IN INDOOR COIL MANUFACTURER HEAT PUMP SECTION. MISMATCHED SYSTEMS MAY NOT WORK PROPERLY AND MAY CAUSE LOSS OF WARRANTY.

61BA0010/013008

Vexar Model #

Replaces Vexar

Model # Connection

Piston or TXV Device Installed in

Coil

Extra Pistons in box for use on other sizes

Operational Range of the metering device (s) (see

specific application sheet for outdoor unit match)*

A B CFace Area

1836QA 1837QA QC TXV (R -22) N /A 1.5-3 .0 18" 19 5 /8" 14" 3.1 sq ft1836SA 1837SA SWT TXV (R -22) N /A 1.5-3 .0 18" 19 5 /8" 14" 3.1 sq ft1849QA 1848QA QC TXV (R -22) N /A 2.5-4 .0 18" 19 5 /8" 18" 4 .0 sq ft1849SA 1848SA SWT TXV (R -22) N /A 2.5-4 .0 18" 19 5 /8" 18" 4 .0 sq ft1854QA N/A QC TXV (R -22) N /A 2.5-5 .0 18" 19 5 /8" 18 1 /2" 4 .0 sq ft1854SA N/A SWT TXV (R -22) N /A

N /A2.5-5 .0 18" 19 5 /8" 18 1 /2" 4 .0 sq ft

1824SP N/A SWT 61 (2-Ton) 2 .0 18" 19 5 /8" 14" 3 .1 sq ft1842SP N/A SWT 73 (3-Ton) .068, .080 2.5-3 .5 18" 19 5 /8" 18" 4 .0 sq ft1854SP N/A SWT 84 (4-Ton) .090 4.0-5 .0 18" 19 5 /8" 18 1 /2" 4 .0 sq ft1836S4A N/A SWT TXV (R -410A ) N /A 1.5-3 .0 18" 19 5 /8" 14" 3 .1 sq ft1837S4A N/A SWT TXV (R -410A ) N /A 1.5-3 .0 18" 19 5 /8" 18" 4 .0 sq ft1842QA N/A QC TXV (R -22) N /A 2.5-4 .0 18" 19 5 /8" 18" 4 .0 sq ft1842SA N/A SWT TXV (R -22) N /A 2.5-4 .0 18" 19 5 /8" 18" 4 .0 sq ft1849S4A N/A SWT TXV (R -410A ) N /A 2.5-4 .0 18" 19 5 /8" 18" 4 .0 sq ft1854S4A N/A SWT TXV (R -410A ) N /A 2.5-5 .0 18" 19 5 /8" 18 1 /2" 4 .0 sq ft

Vexar coils are designed specifically for use with various models of manufactured housing gas furnaces or electric furnaces in bothdown-flow and up-flow applications, as long as the coil was manufactured after 03/01/08 as shown in the serial number. A metal panwill be required on up flow oil furnaces.

Refrigerant

Installation Instructions

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GENERAL COIL INSTALLATION NOTES 1. A ll co ils are sh ipped pressurized w ith e ither

n itrogen or HCFC22. C oils w ith sweat connections are shipped w ith a n itrogen hold ing charge while co ils equipped w ith qu ick connects are sh ipped w ith a HCFC22 hold ing charge. ALL COILS SHOULD BE CHECKED FOR PRESSURE BEFORE INSTALLATION! IF THERE IS NO PRESSURE PRESENT, THE COIL MAY HAVE DEVELOPED A LEAK DURING SHIPMENT AND SHOULD BE RETURNED TO THE POINT OF PURCHASE FOR EXCHANGE.

O n a quick connect co il, test for pressure by pushing against the d iaphragm located inside the quick connect fitting on the suction m anifold. If you are not ab le to depress the d iaphragm , the co il conta ins a HCFC 22 hold ing charge. To test for pressure on a co il equipped w ith sweat fittings, depress the shrader va lve located on the suction m anifo ld . 2 . The b lower and duct system m ust be properly

s ized in order to provide adequate cooling and heating perform ance. Select the correct m otor speed tap on the furnace b lower to g ive the required CFM needed for ra ted cooling capacity or upgrade the b lower assem bly to atta in the proper CFM . Return a ir filters of generous size m ust be provided, in order to avoid contam inating the co il, b lower and ductwork, or restric ting necessary a irflow. Failure to deliver the proper a ir flow across the indoor co il w ill cause system and/or com ponent, i.e . TXV, perform ance problem s.

3 . It is essential that the indoor coil and outdoor unit be properly matched and charged with the proper amount of refrigerant. Incorrect charge levels w ill resu lt in ineffic ient operation. See m ore deta ils in insta lla tion instructions for the outdoor un it.

4 . For optim um perform ance and effic iency of a ir condition ing or heat pum p coils , ad just system charge and/or superheat/subcooling as recom m ended by outdoor un it m anufacturers. P rocedures w ill d iffer between m anufacturers.

5 . It is recom m ended that the co il be sprayed w ith liqu id detergent thoroughly and rinsed thoroughly before insta lla tion to assure proper dra inage of condensate from the co il fins to e lim inate water b lowoff and to assure m axim um coil perform ance. If not sprayed, approxim ate ly 50 hours of break in tim e is required to achieve the sam e results.

6 . A lways be sure co il is insta lled level or s loped slightly toward prim ary and secondary (the h igher of the two) dra in fittings. If m andated by code, connect both dra in lines to open dra in , but never to a c losed sewer. P itch dra in lines away from dra in pan. Always, test dra in lines w ith water before operating. This step is m andatory in a ll m anufactured housing installa tions. Reduction in s ize of the dra in lines is not recom m ended and m any tim es not a llowed.

7 . A WATER TRAP is recom m ended on a ll co il applications, but IS REQUIRED ON PULL

THROUGH INSTALLATIONS ON ELECTRIC FURNACES. FAILURE TO PROVIDE CAN RESULT IN IMPROPER DRAINAGE OR POTENTIAL SHOCK HAZARD.

8. Refrigerant p ip ing is critica l on any co il insta lla tion

when the outdoor un it is to be located below the level o f the co il. For proper p ip ing design considerations, re fer to the guide lines furn ished by the m anufacturer o f the outdoor un it.

9 . Check a ll fie ld insta lled refrigerant connections w ith e lectron ic leak detector, ha lide torch, or soap bubbles.

10. Refer to insta lla tion instructions provided w ith the outdoor un it, gas or e lectric furnace, and line sets for com pletion of system insta lla tion.

INSTALLATION WITH ELECTRIC FURNACE: Typical electric furnace installation consists of a coil without cabinet installed on top of a downflow furnace or the coil inside a cavity on either a downflow or upflow furnace, The fo llow ing Vexar ins ta lla tion k its a re unique to m anufac tu red hous ing a ir cond ition ing and these k its a re requ ired to com p le te the ins ta lla tion . 1 . F ilte r 1122515 is required when using a ll V exar

co il m ode ls on N ordyne dow nflow e lec tric fu rnaces.

2 . A C o il S upport B racke t and Insu la tion K it is requ ired on a ll C olem an m ode l E B xxA o r B e lectric fu rnaces (3500 .8941 ).

3 . A co il support b racke t, less insu la tion , is requ ired on a ll C o lem an m ode l E B xxC e lec tric fu rnaces (3500 .8941B ).

4 . C oil cavity fo r N ordyne e lec tric fu rnaces a re ava ilab le as an op tion (9536 .7411).

Installation procedure: 1 . Turn o ff e lec trica l power to the fu rnace by

tu rn ing o ff b reaker in house pane l. CAUTION: Furnace may be connected to more than one supply circuit. Do not use furnace disconnect only. Check power at furnace to insure power is off.

2 . R em ove filte r a t top o f fu rnace cabine t (Nordyneonly).

3 . R em ove refrige ran t line knockou t a t top of fu rnace (Nordyne only).

4 . Insta ll insu la tion if needed . 5 . A ttach d ra in pan gasket p rovided w ith co il to

unders ide o f co il pan and cente r evapora to r co il on fu rnace . S ee figu re A on page 4 .

IT IS MANDATORY TO USE AN EMERGENCY AUXILIARY DRAIN PAN WITH ANY COIL OR AIR HANDLER INSTALLED IN AN ATTIC OR ABOVE A FINISHED CEILING. IT MUST HAVE ITS OWN DRAIN LINE (A WATER TRAP IS NOT NECESSARY) WITH ITS OUTPUT INTO AN OPEN DRAIN (NOT A CLOSED SEWER). IT SHOULD ALLOW EASY VISUAL INSPECTION SO THAT IF CONDENSATE FLOW IS SEEN THE HOMEOWNER KNOWS THAT THE COIL DRAIN PAN LINES ARE PLUGGED AND NEED MAINTENANCE

ATTENTION!

61BA0010/013008

Installation Instructions

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7 . Rou te low vo ltage w iring , re frige ran t lines and d ra in tub ing th rough floo r penetra tion .

WARNING: If drain hose is below 40 Deg F during installation warm before expanding and/or forming.

8 . Form 3 ” deep trap us ing (fie ld supplied ) tape and (p rovided) flexib le d ra in hose and co nnect

to co il pan d ra in securing w ith c lam p p rovided . S ee figu re B on page 4 . The m ost e ffic ien t use o f d ra in m ate ria l is to fo rm a “P ” trap under the house . All pull through furnaces must have a condensate trap in the drain line.

9 . C onnect re frige ran t lines per ins truc tions w ith line se t. M ake sure to lub rica te qu ick connect th reads w ith re frige ra tion o il fo r p roper m ating . R e fe r to ou tdoor un it insta lla tion instruc tions for add itiona l in fo rm ation on line se t hook -ups and p roper to rque va lues .

10 . W ith the co il in p lace sea l o ff any open ings a t top o r bo ttom o f fu rnace to p revent a ir leakage o r a ir bypass (use s ilve r backed tape p rovided , if needed).

11 . Tu rn power on to fu rnace . 12 . R ep lace fron t door. INSTALLATION WITH GAS FURNACE: Typical downflow gas furnace installation consists of a coil without cabinet installed in the cavity of a downflow furnace. Coil with plastic pan is not suitable for upflow oil furnaces. Installation procedure: 1 . Turn o ff e lec trica l power to fu rnace. 2 . R em ove the lower fron t pane l o f the fu rnace ,

and re -route any gas p ip ing in fron t o f co il com partm ent as required to ins ta ll co il.

3 . R em ove the co il cover panel(s). 4 . R em ove knockou ts in fron t le ft bo ttom o f

fu rnace fo r rou ting o f re frige ran t lines , low vo ltage w iring, and condensate d ra in .

5 . A ttach d ra in pan gaske t p rovided , see figu re “A ”, page 4 , to underside o f co il pan and cen te r co il in co il cavity.

6 . C onnect d ra in hose to condensa te pan fitting , securing w ith c lam p. S ee figu re “B ”, page 4.

7 . R em ove knockou ts from co il cover pane l(s ), cu t fibe rg lass insu la tion covering open ings and re insta ll cover.

8 . Ins ta ll s ilve r backed tape provided to cover open ings in in te rio r panel door and over re frige ran t lines to sea l a round lines

9 . C onnect re frige rant lines and m ake sure a ll connections a re tigh t and w ithou t leaks .

10 . R econnect the gas p ip ing if it was d isconnected and sea l o ff any openings a t bo ttom o f fu rnace . N a tional, s ta te and loca l codes m ust be fo llowed .

11 . Ins ta ll filte r if no t loca ted in fu rnace door. 12 . Turn on gas/e lec trica l supp ly and m ake fina l

sys tem check . 13 . R ep lace fron t door.

SPECIAL CONSIDERATIONS FOR SELECTING HEAT PUMP COILS

The se lection of indoor heat pum p coils is m uch m ore critica l than se lection of indoor co ils for air condition ing units. The d ifferences are as follows: 1 . O nly indoor co ils w ith expansion/check va lve flow

contro l devices m ay be used w ith outdoor heat pum p units. These devices perm it reversing refrigerant flow in the co ils when changing from cooling to heating. A ll expansion va lves have a built-in check m aking them heat pum p capable when m atched w ith the proper AR I ra ted outdoor co il. CAP TUBE OR FIXED RESTRICTOR COILS MUST NOT BE USED WITH HEAT PUMPS.

2 . Matching of indoor coils for heat pumps demands that the heat rejection capacity, internal volume, and equivalent metering device of the matched coil be at least equal to that of the smallest internal volume matched coil recommended by outdoor unit manufacturer for that outdoor unit.

3 . It is important that selection be based on Mortex recommendation for a specific coil with a specific metering device to be used with an outdoor heat pump unit of a specific make, series, and model number.

4. Fa ilure to conform to proper se lection requirem ents w ill a ffect e ffic iency, charg ing, and re liab ility and m ay resu lt in dam age to the system or system com ponents .

5 . The m atching of specific indoor heat pum p coils w ith specific outdoor heat pum p units as certified in the heat pum p section of the current AR I D irectory w ill assure proper and efficient operation of heat pum p system s. See www.ari.org.

SPECIAL INSTRUCTIONS FOR CHARGING

HEAT PUMP COILS

Specific deta iled instructions for re frigerant charg ing of a heat pum p system as recom m ended by the outdoor un it m anufacturer should be fo llowed. These instructions w ill d iffer between m anufacture rs, but in genera l are as fo llows: WITH EXPANSION/CHECK VALVE INDOOR COIL, USE LIQUID LINE SUBCOOLING METHOD IN COOLING MODE. M easure fo llow ing va lues from system : liqu id line pressure at gauge and liquid line

D o not ins ta ll any co il in a gas fu rnace which is to be opera ted during the heating season w ithout a ttach ing the re frigerant lines to the co il. P ossib le co il dam age w ill resu lt from excess ive refrigerant pressure bu ild up during heating opera tion .

ATTENTION!

C on tracto r must com p ly w ith a ll loca l, s ta te , and federa l codes and regu lations when work ing w ith

gas p ip ing . Persona l in ju ry o r dea th m ay resu lt from im proper insta lla tions!

WARNING!

61BA0010/013008

6. Attach filters to sides of coil if Nordyne electric.

Installation Instructions

4

If the insta ller encounters a problem using the outdoor m anufacturers suggested charg ing m ethod he should contact the factory for assistance.

NO TE: G ood preventive m aintenance on heat pum ps is critica l to ensure proper a irflow across the co ils . Low a irflow on indoor co ils during w inter m onths causes h igh head pressures and prem ature com pressor dam age due to oil breakdown. This problem is norm ally the result o f a d irty a ir filter. The insta ller should instruct the hom eowner of the im portance of keeping it clean.

CONTACT US FOR HELP OR FOR ANY COMMENTS ON OUR PRODUCTS.

As we strive to better serve our custom ers like you, we are a lways ready to he lp you. W e a lso welcom e any com m ents from our custom ers concerning quality and im provem ents that could be m ade to our products. Thank you for the purchase of our product.

TW O FITTIN G S C A N BE U SE D W ITH THE M O BILE H O M E P LASTIC P A N TH E 90 DE G E LL, P R O V IDE D , CA N BE S C R EW ED IN THE LEFT D R A IN FITTIN G (M AIN ) A N D E XIT FU R N A C E

HAND TIGHTEN ONLY – OVERTIGHTENING CAN RESULT IN CRACKS IN DRAIN PAN E N C LO S E D D R A IN H O SE W ILL S LIP O V E R TH E F ITT IN G O R A S TA N DA R D PV C FITTIN G CA N BE U SE D IF C O DE RE Q U IRE S

R IG H T D R AIN C O N N E C TIO N HAS A P LU G IN IT TO P RE VE N T FLO W U N LE SS A S E C O N DA R Y D R A IN IS R E Q UIR E D A S TR AIG H T F ITT IN G (F IE LD S U P P LIE D ) IS TO BE U SE D FO R TH E A U XIL IA RY D R AIN W HE R E RE Q U IR E D.

R E M O V E P LU G A N D IN SE R T FITT IN G . TU R N D OW N W ITH A STA N D A R D ¾ IN C H P V C E LL. C A U TIO N ----------B E FO R E IN S TALLIN G C O IL O N FU R N A CE , SE E F IG U R E 2.

S LIP 1” I.D . SE C TIO N O F H O SE O N TO 90 D E G . D R AIN FITTIN G . H O S E IN S O M E CA SE S IS V E RY T IG H T B U T W ILL STR E TC H AS IT IS W O RK E D O N . IF H O S E C A N BE LEFT O N D U R IN G IN STA LLA TIO N, IN S TA LL P RO V IDE D H O SE C LA M P A T TH IS T IM E IF H O S E M U S T B E R E M O VE D TO C O M P LE TE IN S TA LLATIO N M A KE S U R E IT IS S TR E T C HE D TO A LLOW FO R EA SIE R R EA TTA C H M E N T.

tem perature. Com pare m easurem ents to re frigerant T&P chart. Adjust charge to achieve outdoor unit manufacturers recommended liquid line subcooling.

61BA0010/013008

Installation Instructions

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THERMAL EXPANSION VALVE INSTALLATION INSTRUCTIONS

A. INTRODUCTION Thermal expansion valve (TXV) can be used on both heat pump and air conditioning applications. All TXVs have a built-in check valve making them heat pump capable. All are externally equalized with non-adjustable superheat and are available with non-bleed construction. Hard start capability for outdoor units is required when non-bleed valve is used. The external equalizer line attached to the TXV has a female flare nut with built in Schrader valve depressor that attaches to the Schrader valve port provided on most coils.

B. INSTALLATION NOTES With reference to Figure 1, the TXV assembly is to be installed between the flowrator distributor and the existing liquid line attached to the flowrator distributor.

WARNING: COIL IS PRESSURIZED. RELIEVE PRESSURE BEFORE INSTALLING TXVBY DEPRESSING SCHRADER VALVE ON COILMANIFOLD IF NITROGEN, OR RECLAIMREFRIGERANT IF COIL HAS HOLDING CHARGE.

C. INSTALLATION STEPS ARE AS FOLLOWS: 1. After coil pressure has been relieved, turn the female

swivel nut counter-clockwise to remove. 2. Remove the piston from the flowrator distributor

fitting using a small diameter wire or paper clip (ALWAYS REMOVE THE PISTON FROM DISTRIBUTOR BODY WHEN TXV IS INSTALLED).

3. Attach the TXV by connecting the female swivel nut on TXV outlet to the flowrator distributor (aligning Teflon seal first) and torque swivel nut to 10-30 ft. lb.

4. Attach liquid line with female swivel nut to male rotalock fitting on TXV inlet (aligning Teflon seal first) and torque swivel nut to 10-30 ft. lb.

5. Remove the cap on Schrader valve port on coil manifold. Attach equalizer tubing with 1/4” female flare nut that includes depressor to this male Schrader port. Torque flare nut to 10-30 ft. lb.

6. Install the TXV bulb to the suction manifold of coil or the suction line using the two bulb clamps, or single large clamp, furnished with kit. a. Bulb should be installed on a horizontal run of

the manifold if possible. On line 7/8” OD andsmaller the bulb should be installed at 2 or 10 o’clock. With line larger than 7/8” OD, the bulb should be installed in a position of about 4 or 8o’clock.

b. If bulb installation is made on a vertical run, the bulb should be located at least 6 inches from any bend, and on the tubing side opposite the plane of the bend. On vertical bulb installations, the bulb should be positioned with bulb capillary tube at the top.

c. The bulb should be insulated using thermal insulation to protect it from the effect of the surrounding ambient temperature.

7. After completing installation of TXV (including equalizer tube), it will be necessary to leak check the coil and evacuate the coil through the service access fittings of liquid and suction line valves. SEE COIL AND UNIT INSTALLATION INSTRUCTIONS.

LIQUID LINE

HEX NUT

SENSOR BULBTUBE

FLOWRATORDISTRIBUTOR BODY

FEED TUBESTO COIL

CONECT TOSCHRADER PORT

EXPANSION VALVE KIT

FLOWRATOR DISTRIBUTOR

LIQUID LINE FROM COIL

TEFLON SEAL

TEFLON SEAL

Must be at least6” between elbow and bulb

Vertical Riser Application

Tail on bulbMust point up

z

z

2 O'CLOCK10 O'CLOCK

SENSING BULB

STRAP

SUCTION TUBE

8 O'CLOCK 4 O'CLOCK

7/8 O.D. & SMALLER LARGER THAN 7/8 O.D.

Horizontal Bulb Locations

Figure 1

If using adifferent brand TXV, you must remove theschrader valve core prior to attaching the equalizer tube.

61BA0010/013008