Two-stage compressors
At a glanceRefrigeration circuit Operating limits and performance data R404A | R410 | R22 Technical data Dimensions and connections Scope of supply and accessories
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TypeDisplacement (50 Hz)
LP / HP
HGZX7/1620-4 R404A/R507
93,70 m³/h / 46,90 m³/hHGZX7/1620-4 R410A
HGZ7/1620-4 R22
HGZX7/1860-4 R404A/R507
107,60 m³/h / 53,80 m³/hHGZX7/1860-4 R410A
HGZ7/1860-4 R22
HGZX7/2110-4 R404A/R507
122,40 m³/h / 61,20 m³/hHGZX7/2110-4 R410A
HGZX7/2110-4 R22
A two-stage variant based on the Bock HG semi-hermetic 6 cylinder range is available for extended use in the domain of deep-freezing.
The two stage system consists of:Liquid subcooler -
Reinjection valve -
Solenoid valve -
Sight glass -
Filter drier -
The two possible designs of the HGZ7:
Medium-pressure mixed line mounted on the compressor and insulated liquid subcooler, expansion valve, solenoid valve, two sight glasses, fi lter drier everything enclosed separately for individual, external mounting
Standard Option
Special features:
6 cylinder design -
LP/HP stage ratio 2:1 -
2 stage operation with liquid subcooler -
Reinjection valve adapted to refrigerant and application -
Extremely reliable and economic compressor design -
Detailed descriptions and information on the HG7 basic compres-sor can be found in the chapter entitled “Series HG(HA)single-stage compressors“ starting on page 32.
Two-stage compressors - At a glance
Liquid subcooler, expansion valve, solenoid valve, two sight glasses, fi lter dryer mounted directly to the compressor, lined and insulated.
Available modelsfor refrigerants R404A, R410A, R507, R22
Type key | Two-stage compressors
HGZX7 / 2110 - 4 R410A
Refrigerant 3)
Number of poles Swept volume Size Ester oil fi lling 2)
Series 1)
1) HG = Hermetic Gas-cooled (suction gas-cooled), two stage2) X = Ester oil fi lling (HFC refrigerants R404A, R410A)3) Possible refrigerants are R404A, R410A, R22
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Two-stage compressors - At a glance
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Refrigeration circuit and two-stage compressorSchematic Diagram
Explanations
Compressor Cylinder LP-stage Intermediate pressure chamber MP Intermediate pressure line MP Cylinder HP-stage Subcooler* Reinjection valve* Sight glass 1* Sight glass 2* Solenoid valve* Filter drier* Vibration damper, pressure line Oil separator Non-return valve Condenser Refrigerant receiver
Filter drier Solenoid valve Sight glass Expansion valve (evaporator) Evaporator Liquid separator Vibration damper, suction line Filter suction line
LP = Low pressureMP = Medium pressureHP = High pressureFUE = Liquid subcooler, inletFUA = Liquid subcooler, outlet
* Components for subcooling system as standard
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Two-stage compressors - At a glance
Subcooling temperature
The design of the expansion valve on the compressor can be defined with the help of the diagram by approximately calcula-ting the subcooling temperature arising in the relevant operating conditions (to/tc).
Subcooling temperature calculation diagram for the intermedi-ate cooler outlet.
tU = Subcooling temperature at the intermediate cooler outlet (FUA)tO = Evaporation temperature (°C)
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-30-40-50-60-7020
30
40
50
6058
t (°C)o
t (°C)c
∆toh<10K
-20-30-40-50-6020
30
40
50
60
t (°C)o
t (°C)c
66
∆toh<10K
Operating limits
R404A/R507 R410A
R22
Application range
tO Evaporating temperature (°C)tC Condensing temperature (°C)∆tOh Suction gas superheat (K)
Max. permissible operating pressure (LP/MP/HP) 1): 19/19/28 bar
1) LP = low pressure MP = middle pressure HP = high pressure
Notes
Operating limits
Compressor operation is possible within the limits shown on the application diagrams. Compressor application limits should not be chosen for design purposes or continuous operation.
Performance data
The stated performance values are based on 10 K suction gas superheat with liquid subcooling, operating at 50 Hz.
Performance data were compiled for R404A and R507.The base values are the data for R404A.
Conversion factor for 60 Hz = 1,2Performance data for other operating points, see Bock software.
Two-stage compressors - Operating limits
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Type Cond.temp.
°C
Cooling capacity QO [W] Power consumption Pe [kW]
Evaporating temperature °C
-35 -40 -45 -50 -55 -60 -65
HGZX7/1620-430
QP
2535422,89
1996720,80
1528518,67
1139616,43
838514,00
40QP
1913122,87
1463020,63
1086818,25
793015,68
HGZX7/1860-430
QP
2918226,28
2285923,89
1753021,44
1313618,87
961416,08
40QP
2195926,26
1677423,68
1250820,96
910118,00
HGZX7/2110-430
QP
3319529,90
2600327,17
1994124,39
1494321,46
1093718,29
40QP
2498029,87
1908226,94
1422923,84
1035220,48
•
R410A Performance data 50 Hz
Two-stage compressors - Performance data
Type Cond.temp.
°C
Cooling capacity QO [W] Power consumption Pe [kW]
Evaporating temperature °C
-30 -35 -40 -45 -50 -55 -60 -65 -70
HGZX7/1620-4
30QP
3486921,17
2847119,41
2309817,63
1862815,84
1493614,05
1189912,31
939410,61
72968,99
54827,46
40QP
3343723,42
2731521,42
2218119,40
1791017,39
1438015,41
1146713,48
904711,61
69979,84
51928,17
50QP
2586023,49
2095021,24
1686619,02
1348416,84
1068014,72
833212,68
631510,75
HGZX7/1860-4
30QP
4004224,31
3269422,29
2652520,24
2139118,18
1715216,14
1366514,13
1078712,19
837810,32
62948,56
40QP
3839726,90
3136724,60
2547122,28
2056719,97
1651417,70
1316915,48
1039013,34
803511,30
59629,38
50QP
2969626,98
2405724,39
1936721,84
1548419,33
1226516,90
956814,56
725212,35
HGZX7/2110-4
30QP
4555027,66
3719125,36
3017323,03
2433420,69
1951118,36
1554416,08
1227113,86
953011,74
71609,74
40QP
4367930,60
3568127,98
2897425,34
2339622,72
1878520,13
1498017,61
1181915,17
914012,85
678210,67
50QP
3378030,69
2736627,75
2203124,84
1761421,99
1395219,23
1088416,57
824914,04
•
R404A/R507 Performance data 50 Hz
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Performance data 50 Hz relative to 10 K suction gas superheat with liquid subcooling
Type Cond.temp.
°C
Cooling capacity QO [W] Power consumption Pe [kW]
Evaporating temperature °C
-30 -35 -40 -45 -50 -55 -60
HGZ7/1620-4
30QP
2971118,26
2421416,81
1944815,40
1536514,03
1192112,70
907011,41
676510,16
40QP
2905920,23
2363018,52
1893016,86
1491415,23
1153713,64
875312,10
50QP
2835522,30
2299220,33
1836018,41
1441116,53
1110014,69
60QP
2759824,47
2230222,25
1773620,07
1385417,93
HGZ7/1860-4
30QP
3008820,97
2788119,31
2240817,69
1766916,11
1366414,58
1039313,10
785511,67
40QP
3329623,23
2718121,27
2180019,36
1715317,49
1324015,67
1006113,89
50QP
3243425,60
2641123,35
2112221,14
1656718,98
1274616,68
60QP
3150328,09
2557225,54
2037523,04
1591220,59
HGZ7/2110-4
30QP
3881123,86
3163221,96
2540620,12
2007218,33
1557316,59
1184814,91
883713,27
40QP
3796026,43
3086824,20
2472922,02
1948319,89
1507117,82
1143315,80
50QP
3704029,13
3003526,56
2398424,05
1882521,59
1450019,18
60QP
3605031,96
2913329,06
2316926,21
1809723,42
•
R22 Performance data 50 Hz
Two-stage compressors - Performance data
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HGZ
Type
Numberof
cylinders
Displacement Electrical data 3 Weight Oil charge
50 Hz(1450 1/min)
LP HP
60 Hz(1740 1/min)
LP HP
Voltage
1
Max.working current
2
Max. powerconsumption
2
Startingcurrent
(rotor locked)
m³/h m³/h A kW A kg Ltr.
* PW 1+2 * PW1 / PW 1+2
HGZX7/1620-4 R404A
6 93,70 / 46,90 112,50 / 56,20 4 50 27,0 185 / 278 294 4,8HGZX7/1620-4 R410A
HGZ7/1620-4 R22
HGZX7/1860-4 R404A
6 107,60 / 53,80 129,10 / 64,60 4 55 30,0 185 / 278 291 4,8HGZX7/1860-4 R410A
HGZ7/1860-4 R22
HGZX7/2110-4 R404A
6 122,40 / 61,20 146,90 / 73,50 4 65 36,0 191 / 286 289 4,8HGZX7/2110-4 R410A
HGZ7/2110-4 R22
LP = low pressureHP = high pressure
Oil sump heater 230V -1- 50/60 Hz 140 WPermanently set version, installation in immersion sleeve
* PW = Part Winding, motors for part winding start 1 = 1. part winding 2 = 2. part winding
Explanations:
Tolerance (± 10%) relates to the mean value of the voltagerange. Other voltages and current types on request.
Take account of the max. operating current / max. powerconsumption when designing contactors, leads and fuses.Switches: Service category AC3
All data are based on the mean value of the voltage range.
380-420 V∆/YYY - 3 - 50 Hz PW440-480 V∆/YYY - 3 - 60 Hz PWPW = Part Winding, motors for part winding start(no start unloaders required) Winding ratios: 60% / 40%
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Two-stage compressors - Technical data
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Dimensions in mm Centre of gravity
HGZ7 Standard Liquid subcooler with accessories supplied separately
HGZ7 Option Liquid subcooler with complete accessories directly mounted onto the compressor
Connections see page 178 -Rigid fixing without anti-vibration pad -Dimensions for view X see page 179 -
ca.285
ca.2
30
FÖV
J
P
D
B1
B
KO
D1H
SVX
CE
L
A1WDV
Q4xØ11
ca.630
576
290
340
ca.6
35
A
A3
A2
15,5
139
ca.825
472
189X
Z
RZ
Two-stage compressors - Dimensions and connections
ca.670
U
FS
FUE
FS
T
N FUA
X
260ca.
ca.950
ÖV1
V
R1
D
L1
3
2
1
Liquid subcooler with accessories Oil service valve Oil pressure safety switch 1 2 3
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Two-stage compressors - Dimensions and connections
Connections Connections
DV Discharge line Ø 35 mm / 1 3/8 " J Oil sump heater M 22 x 1,5
SV Suction line Ø 54 mm / 2 1/8 " K Sight glass 3 hole M 6
FUELiquid subcooler ON
Ø 16 mm - 5/8 " LConnection thermalprotection thermostat
1/8 " NPTF
FUALiquid subcooler OFF
Ø 16 mm - 5/8 " L1 Thermal protection thermostat 1/8 " NPTF
AConnection suction side,not lockable
1/8 " NPTF N Filter drier Ø 12 mm
A1Connection suction side,lockable
7/16 " UNF OConnection oil level regulator
1
A2Connection intermediate pressure, not lockable
1/8 " NPTF ÖVConnection oil service valve
1/4 " NPTF 1)
A3Connection intermediate pressure, not lockable
1/4 " NPTF ÖV1 Oil service valve 7/16 " UNF
BConnection discharge side,not lockable
1/8 " NPTF PConnection oil pressuredifferential sensor
M 20 x 1,5
B1Connection discharge side,lockable
7/16 " UNF QConnectionoil temperature sensor
1/8 " NPTF 1)
CConnection oil pressuresafety switch OIL
7/16 " UNF RConnectionequalizer for injection valve
7/16 " UNF
DConnection oil pressuresafety switch LP
7/16 " UNF R1 Equalizer for injection valve Ø 6 mm
D1Connection oil return fromoil separator
1/4 " NPTF T Solenoid valve Ø 12 mm
EConnection oil pressure gauge
7/16 " UNF UReinjection valve -dependent on refrigerant
Ø 12 mm
F Oil drain M 22 x 1,5 V Oil pressure safety switch MP 54 -
FSSight glassliquid line
Ø 12 mm WConnectionrefrigerant injection
M 22 x 1,5
H Oil charge plug M 22 x 1,5 XConnection for Schrader valve for intermediate pressure manometer
7/16 " UNF
1 Dimensions see view X page 179
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View X
Dimensions in mm
Possibility to connect to oil level regulator
Three-hole connection for oil level regulator make ESK, AC+R, CARLY (3x M6, 10 deep)
Two-stage compressors - Dimensions and connections
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Scope of supply
Semi-hermetic six cylinder reciprocating compressor with drive motor for part winding start380-420 V ∆/YYY - 3 - 50 Hz440-480 V ∆/YYY - 3 - 60 HzSingle-section compressor housing with hermetically integrated electric motor
Cylinder design in W form, LP/HP stage ratio 2:1
1 Intermediate pressure line mounted and insulated
2 Liquid subcooler, reinjection valve, solenoid valve, two sight glasses, fi lter drier. Supplied separately for individual, external installation
3 Winding protection with PTC sensors and Bock MP10 electronic motor protection
4 Oil pump cover with screw connection for oil differential pressure sensor (∆p switch Kriwan make)
5 Direct connection possibility for oil level regulators ESK, AC+R or CARLY
6 Oil sump heater 230 V - 1 - 50/60 Hz, 140 WPermanently set version, installation in immersion sleeve
Oil charge:HGZ: FUCHS Reniso SP 46HGZX: FUCHS Reniso Triton SE 55
7 Three sight glasses
Decompression valve
8 9
Suction and discharge line shut off valve
Inert gas charge
1 2 3
4 5
7 98
Two-stage compressors - Scope of supply
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Accessories
1 Liquid subcooler, reinjection valve, solenoid valve, two sight glasses, fi lter drier, directly mounted onto the compressor,fully assembled and insulated with pipes ready for connection
2 Oil pressure safety switch MP 54 230 V - 1 - 50/60 Hz, IP20, including installation
3 Oil differential pressure sensor (∆p switch Kriwan make)220-240 V - 1 - 50/60 Hz
4 Oil service valve
5 Thermal protection thermostat (PTC sensor) IP67
6 Bock Compressor Management BCM2000 including oil pressure control,oil temperature control (NTC), thermal protection thermostat (PTC) on HD side
Two-stage compressors - Accessories
