Lennox LRP14HP Series User manual

Page 1
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer or
equivalent, service agency, or the gas supplier.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for noncompliance.
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.
WARNING
Electric Shock Hazard. Can cause injury or
death. Unit must be properly grounded in
accordance with national and local codes.
Line voltage is present at all components when
unit is not in operation on units with single-
pole contactors. Disconnect all remote electric
power supplies before opening access panel.
Unit may have multiple power supplies.
LRP14HP/AC/GE/GN
LRP16GE/HP
Table of Contents
Specications – LRP14HP .............................................2
Specications – LRP14AC ............................................3
Specications – LRP14GE / LRP14GX .........................4
Specications – LRP14GN ............................................5
Specications – LRP16GE / LRP16GX .........................6
Specications – LRP16HP ............................................7
Electric Heat Capacities – LRP14HP and AC Models –
LRP16HP .......................................................................8
Gas Heat Capacities – LRP14GE Only .........................8
Gas Heat Capacities – LRP16GE Only .........................8
Gas Heat Capacities – LRP14GN Only .........................8
Electrical .......................................................................9
Typical Parts Arrangement ..........................................16
Unit Applications ..........................................................18
Blower Data – LRP14HP .............................................23
Blower Data – LRP14AC .............................................24
Blower Data – LRP14GE / LRP14GX...........................25
Blower Data – LRP14GN..............................................26
Blower Data – LRP16GE / LRP16GX...........................27
Blower Data – LRP16HP..............................................28
Wiring Diagrams and Sequence of Operation..............35
LRP14GN – Heating Components and Operation........46
Service Literature
UNIT INFORMATION
Corp. 100032
October 7, 2021
LRP14HP/LRP14AC/LRP14GE/LRP14GN/LRP16GE/LRP16HP SERIES UNITS
The LRP14/16 series packaged units are available in siz-
es ranging from 2 through 5 tons (7.0 through 17.6 kW).
The LRP14/16 unit is designed for HFC-410A refrigerant
and for outdoor residential use only. Units can be installed
at ground level or on rooftops. The LRP14 units utilize a
scroll compressor. LRP16GE/GX/HP units utilize a two-
stage compressor. Information contained in this manual is
intended for use by qualied service technicians only. All
specications are subject to change. Procedures outlined
in this manual are presented as a recommendation only
and do not supersede or replace local or state codes.

Page 2
Specications – LRP14HP
General Data Model No. LRP14HP24LRP14HP30 LRP14HP36LRP14HP42 LRP14HP48LRP14HP60
Nominal Tonnage 22.5 33.5
45
Cooling /
Heating
Performance
Cooling Total capacity - Btuh 22,600 28,600 34,000 40,000 46,000 57,000
Total unit watts 2055 2600 3090 3635 4180 5180
1SEER (Btuh/Watt) 14.00 14.0014.00 14.0014.00 14.00
EER (Btuh/Watt) 11.00 11.0011.00 11.0011.00 11.00
High Temp.
Heat
Total capacity - Btuh 22,000 27,000 32,400 39,000 45,000 56,000
Total unit watts 1700 2140 2645 3175 3565 4440
COP 3.80 3.70 3.70 3.60 3.70 3.70
HSPF Region IV / Region V 8.00 / 6.95 8.00 / 6.95 8.00 / 6.95 8.00 / 6.95 8.00 / 6.95 8.00 / 6.95
Low Temp.
Heat
Total capacity - Btuh 12,300 15,900 20,000 23,600 27,000 33,600
Total unit watts 1570 2025 2550 3010 3445 4105
COP 2.30 2.30 2.30 2.30 2.30 2.40
2Sound Rating Number (dBA) 78 78 76 78 79 78
Refrigerant Type R-410A R-410A R-410A R-410AR-410AR-410A
Charge 5 lbs. 11 oz. 6 lbs. 0 oz.5lbs. 12 oz.10 lbs. 5 oz.10 lbs. 3 oz.10 lbs. 1 oz.
Condensate drain size (fpt) - in. 3/4 3/43/4 3/43/4 3/4
Outdoor Coil Net Face Area - sq. ft. 16.4 16.4 16.4 16.6 16.6 18.6
Tube diameter - in. 5/16 5/16 5/16 5/16 5/16 5/16
Number of Rows
111222
Fins per in. 22 22 22 22 22 22
Outdoor Coil
Fan
Motor horsepower 1/6 1/61/6 1/41/4 1/3
Diameter - in. 22 22 22 24 24 24
Number of blades
444333
Indoor Coil Net Face Area - sq. ft. 4.4 4.44.4 6.86.8 6.8
Tube Diameter - in. 5/16 3/83/8 3/83/8 3/8
Number of Rows
333333
Fins per Inch 15 15 15 15 15 15
Indoor Blower Blower wheel size dia. x width - in. 10 x 610 x 610 x 810 x 10 10 x 10 12 x 10
Motor horsepower 1/3 1/21/2 3/43/4 1
Net weight of basic unit - lbs. 383 392402 505510 532
Shipping weight of basic unit (1 Pkg.) - lbs. 388 397407 510515 537
Electrical characteristics (60 Hz) 208/230V-1ph-60Hz
1AHRI Certified to AHRI Standard 210/240:
Cooling Ratings - 95°F outdoor air temperature and 80°F db/67°F wb entering indoor coil air.
High Temperature Heating Ratings - 47°F db/43°F wb outdoor air temperature and 70°F entering indoor coil air.
Low Temperature Heating Ratings - 17°F db/15°F wb outdoor air temperature and 70°F entering indoor coil air.
2Sound Rating Number rated in accordance with test conditions included in AHRI Standard 270.

Page 3
Specications – LRP14AC
General Data Model No. LRP14AC24 LRP14AC30 LRP14AC36 LRP14AC42 LRP14AC48 LRP14AC60
Nominal Tonnage 22.533.5
45
Cooling
Performance
Total cooling capacity - Btuh 22,600 28,40034,000 40,000 45,500 57,000
Total unit watts 2055 2580 3090 3635 4180 5180
1SEER (Btuh/Watt) 14.00 14.0014.00 14.0014.00 14.00
EER (Btuh/Watt) 11.00 11.0011.00 11.0011.00 11.00
2Sound Rating Number (dBA) 77 79 78 78 77 78
Refrigerant Type R-410A R-410A R-410A R-410A R-410A R-410A
Charge 4 lbs. 8 oz. 5 lbs. 0 oz.5lbs. 7 oz.6lbs. 12 oz.7lbs. 3 oz.7lbs. 13 oz.
Condensate drain size (fpt) - in. 3/4 3/43/4 3/43/4 3/4
Outdoor Coil
Fan
Motor horsepower 1/6 1/61/6 1/41/4 1/4
Diameter - in. & No. of blades 22 - 422 - 422 - 424 - 324 - 324 - 3
Indoor
Blower
Blower wheel size dia. x width - in. 10 x 610 x 610 x 810 x 10 10 x 10 12 x 9
Motor horsepower 1/3 1/21/2 3/43/4 1
Net weight of basic unit - lbs. 381 393401 474478 517
Shipping weight of basic unit (1 Pkg.) - lbs. 386 398406 479483 522
Electrical characteristics (60 Hz) 208/230V-1ph-60Hz
1
2Sound Rating Number rated in accordance with test conditions included in AHRI Standard 270.

Page 4
Specications – LRP14GE / LRP14GX
General Data Model No. LRP14GE24 LRP14GE30 LRP14GE36 LRP14GE42 LRP14GE48 LRP14GE60
Model No. - Low NOX LRP14GX24 LRP14GX30 LRP14GX36 LRP14GX42 LRP14GX48 LRP14GX60
Nominal Tonnage 22.533.5
45
Gas Heat Available - See Page Page 9 -054(GX),
-072
-054(GX),
-072
054,
-072(GX),
-090
-072(GX),
-090
-108(GX),
-126
-108(GX),
-126
Cooling
Performance
Total cooling capacity - Btuh 22,600 28,400 34,000 40,000 45,500 57,000
Total Unit Watts 2055 2580 3090 3635 4180 5180
1SEER (Btuh/Watt) 14.00 14.0014.00 14.0014.00 14.00
EER (Btuh/Watt) 11.00 11.0011.00 11.0011.00 11.00
2Sound Rating Number (dBA) 77 79 78 78 77 78
Refrigerant Type R-410A R-410AR-410AR-410AR-410AR-410A
Charge 4 lbs. 8 oz.5lbs. 0 oz.5lbs. 7 oz.6lbs. 12 oz.7lbs. 3 oz.7lbs. 13 oz.
Condensate drain size (fpt) - in. 3/4 3/43/4 3/43/4 3/4
Outdoor Coil Net Face Area - sq. ft. 14.6 16.4 16.4 19.5 19.5 16.6
Tube Dia. - in. and No. of Rows 5/16 - 15/16 - 15/16 - 15/16 - 15/16 - 15/16 - 2
Fins per inch 26 26 26 26 26 22
Outdoor Coil
Fan
Motor horsepower 1/6 1/61/6 1/41/4 1/4
Dia. - in. and No. of blades 22 - 422 - 422 - 424 - 324 - 324 - 3
Indoor Coil Net Face Area - sq. ft. 4.4 4.44.4 6.86.8 6.8
Tube Dia. - in. and No. of rows 3/8 - 25/16 - 35/16 - 35/16 - 35/16 - 33/8 - 3
Fins per in.161615151
51
5
Indoor Blower Blower wheel size dia. x width - in. 10 x 610 x 610 x 810 x 10 10 x 10 12 x 9
Motor horsepower 1/3 1/21/2 3/43/4 1
Net weight of basic unit - lbs. 405 417433 507523 560
Shipping weight of basic unit (1 Pkg.) - lbs. 410 422438 512528 565
Electrical characteristics (60 Hz) 208/230V-1ph-60Hz

Page 5
Specications – LRP14GN
General Data Model No. LRP14GN24LRP14GN30 LRP14GN36 LRP14GN42 LRP14GN48 LRP14GN60
Nominal Tonnage 22.533.5
45
Gas Heat Available - See Page Page 9 -054 -054 -054 -072 -072 -072
Cooling
Performance
Total cooling capacity - Btuh 22,600 28,400 34,000 40,000 45,500 57,000
Total Unit Watts 2055 2580 3090 3635 4180 5180
1SEER (Btuh/Watt) 14.00 14.0014.00 14.0014.00 14.00
EER (Btuh/Watt) 11.00 11.0011.00 11.0011.00 11.00
2Sound Rating Number (dBA) 77 79 78 78 77 78
Refrigerant Type R-410A R-410AR-410AR-410AR-410AR-410A
Charge 4 lbs. 8 oz.5lbs. 0 oz.5lbs. 7 oz.6lbs. 12 oz.7lbs. 3 oz.8lbs. 11 oz.
Condensate drain size (fpt) - in. 3/4 3/43/4 3/43/4 3/4
Outdoor Coil Net Face Area - sq. ft. 14.6 16.4 16.4 19.5 19.5 16.6
Tube Dia. - in. and No. of Rows 5/16 - 15/16 - 15/16 - 15/16 - 15/16 - 15/16 - 2
Fins per inch 26 26 26 26 26 22
Outdoor Coil
Fan
Motor horsepower 1/6 1/61/6 1/41/4 1/4
Dia. - in. and No. of blades 22 - 422 - 422 - 424 - 324 - 324 - 3
Indoor Coil Net Face Area - sq. ft. 4.4 4.44.4 6.86.8 6.8
Tube Dia. - in. and No. of rows 3/8 - 25/16 - 35/16 - 35/16 - 35/16 - 33/8 - 3
Fins per in.161615151
51
5
Indoor Blower Blower wheel size dia. x width - in. 10 x 610 x 610 x 810 x 10 10 x 10 12 x 10
Motor horsepower 1/3 1/21/2 3/43/4 1
Net weight of basic unit - lbs. 401 408424 516519 551
Shipping weight of basic unit (1 Pkg.) - lbs. 407 414430 522525 557
Electrical characteristics (60 Hz) 208/230V-1ph-60Hz

Page 6
Specications – LRP16GE / LRP16GX
General Data Model No. LRP16GE24LRP16GE36 LRP16GE48LRP16GE60
Model No. - Low NOXLRP16GX24LRP16GX36 LRP16GX48LRP16GX60
Nominal Tonnage
2345
Gas Heat Available - See Page 9-72 -72, -90-10
8-
126
Cooling
Performance
Total cooling capacity - Btuh 23,800 35,400 47,500 57,000
Total Unit Watts 1900 2950 3960 4750
1SEER (Btuh/Watt) 16.016.0 16.0 16.0
EER (Btuh/Watt) 12.512.0 12.0 12.0
2Sound Rating Number (dBA) 74 75 75 74
Refrigerant Type R-410A R-410A R-410A R-410A
Charge 5 lbs. 7 oz.5lbs. 12 oz.6lbs. 10 oz.9lbs. 1 oz.
Condensate drain size (fpt) - in. 3/43/4 3/
43
/4
Outdoor Coil Net Face Area - sq. ft. 14.616.4 19.5 19.1
Tube Dia. - in. and No. of Rows 5/16 – 15/16 – 15/16 – 15/16 – 2
Fins per inch 26 26 26 22
Outdoor Coil
Fan
Motor horsepower 1/61/6 1/
41
/4
Dia. - in. and No. of blades 22 – 3 22 – 324 –
32
4 – 3
Indoor Coil Net Face Area - sq. ft. 4.44.4 6.
86
.8
Tube Dia. - in. and No. of rows 3/8 – 33/8 – 33/8 – 33/8 – 3
Fins per in.15151
51
5
Indoor Blower Blower wheel size dia. x width - in. 10 x 610 x 810 x 10 12 x 9
Motor horsepower 1/21/2 3/
41
Net weight of basic unit - lbs. 425 437536 572
Shipping weight of basic unit (1 Pkg.) - lbs. 430 442541 577
Electrical characteristics (60 hz) 208/230V-1ph-60Hz

Page 7
Specications – LRP16HP
General Data Model No. LRP16HP24LRP16HP36 LRP16HP48 LRP16HP60
Nominal Tonnage
2345
Cooling /
Heating
Performance
Cooling Total capacity - Btuh 23,000 35,000 47,000 57,000
Total unit watts 1910 2910 3910 4950
1SEER (Btuh/Watt) 16.0 16.016.
01
5.5
EER (Btuh/Watt) 12.0 12.012.
01
1.5
High Temp.
Heat
Total capacity - Btuh 22,000 34,000 46,000 56,000
Total unit watts 1791 2770 3740 4440
COP 3.60 3.60 3.60 3.70
HSPF (Region IV) 8.20 8.20 8.20 8.20
Low Temp.
Heat
Total capacity - Btuh 11,900 19,700 26,600 37,200
Total unit watts 1480 2530 3500 4250
COP 2.36 2.28 2.23 2.57
2Sound Rating Number (dBA) 71 71 74 74
Refrigerant Type R-410A R-410A R-410A R-410A
Charge 5 lbs. 5 oz.8lbs. 0 oz. 10 lbs. 8 oz.10 lbs. 8 oz.
Condensate drain size (fpt) - in. 3/43/4 3/
43
/4
Outdoor Coil Net Face Area - sq. ft. 16.3 15.518.
61
8.6
Tube diameter - in. 5/16 5/16 5/16 5/16
Number of Rows
1222
Fins per in. 22 22 22 22
Outdoor Coil
Fan
Motor horsepower 1/21/2 1/
21
/2
Diameter - in. 22 22 24 24
Number of blades
3333
Indoor Coil Net Face Area - sq. ft. 4.44.4 6.
86
.8
Tube Diameter - in. 5/16 3/83/8 3/8
Number of Rows
3333
Fins per Inch 15 15 15 15
Indoor Blower Blower wheel size dia. x width - in. 10 x 6 10 x 8 10 x 10 12 x 9
Motor horsepower 1/21/2 3/
41
Net weight of basic unit - lbs. 425 460 540 555
Shipping weight of basic unit (1 Pkg.) - lbs. 430 465 545 560
Electrical characteristics (60 hz) 208/230V-1ph-60hz
1AHRI to AHRI Standard 210/240:
Cooling Ratings - 95°F outdoor air temperature and 80°F db/67°F wb entering indoor coil air.
High Temperature Heating Ratings - 47°F db/43°F wb outdoor air temperature and 70°F entering indoor coil air.
Low Temperature Heating Ratings - 17°F db/15°F wb outdoor air temperature and 70°F entering indoor coil air.
2Sound Rating Number rated in accordance with test conditions included in AHRI Standard 270.

Page 8
Electric Heat Capacities – LRP14HP and AC Models – LRP16HP
Input
Voltage
5 kW 7.5 kW 10 kW 15 kW 20 kW
No of
Steps
kW
input
Btuh
Output
No of
Steps
kW
input
Btuh
Output
No of
Steps
kW
input
Btuh
Output
No of
Steps
kW
input
Btuh
Output
No of
Steps
kW
input
Btuh
Output
208 1 3.8 12,800 1 5.6 19,200 1 7.5 25,600 1 11.2 38,200 1 15.0 51,200
22014.2 14,300 1 6.3 21,500 1 8.4 28,700 1 12.6 43,000 1 16.8 57,300
23014.6 15,700 1 6.9 23,500 1 9.2 31,300 1 13.8 47,000 1 18.4 62,700
240 1 5.0 17,100 1 7.5 25,600 1 10.0 34,100 1 15.0 51,200 1 20.0 68,200
Gas Heat Capacities – LRP14GE Only
Model 24, 30, 36 24, 30 36, 42 36, 42 48, 60 48, 60
Heating Input-054 -072 -072 -090 -108 -126
Heating
Capacity Btuh
Input 54,000 72,000 72,000 90,000 108,000 126,000
Output 43,800 58,400 58,400 72,900 87,500 102,100
1AFUE 81% 81% 81% 81% 81% 81%
Temperature Rise - °F 30-60 40-70 35-65 40-70 40-70 45-75
Gas Supply Connection (FPT) - in. 1/2 1/2 1/2 1/2 1/2 1/2
Min. Recommended Gas Supply Pressure 5 in. w.g. Natural Gas, 11 in. w.g LPG / Propane
1Annual Fuel Utilization Efficiency based on U.S. DOE test procedures and FTC labeling regulations.
Gas Heat Capacities – LRP16GE Only
Model 24, 36 36 48 60
Heating Input -072 -090 -108 -126
Heating
Capacity Btuh
First Stage - Input 54,000 67,500 81,000 94,500
Output 43,500 54,500 65,500 76,500
Second Stage Input 72,000 90,000 108,000 126,000
Output 58,000 73,000 88,000 102,000
1AFUE 81% 81% 81% 81%
Temperature Rise - °F First Stage 35-45 35-45 45-55 45-55
Second Stage 45-55 45-55 50-60 50-60
Gas Supply Connection (FPT) - in. 1/2 1/2 1/2 1/2
Min. Recommended Gas Supply Pressure 5 in. w.g. Natural Gas, 11 in. w.g LPG / Propane
1Annual Fuel Utilization Efficiency based on U.S. DOE test procedures and FTC labeling regulations.
Gas Heat Capacities – LRP14GN Only
Model 24, 30, 36 42, 48, 60
Heating Input -054 -072
Heating Capacity
Btuh
Input 54,000 72,000
Output 43,800 58,320
1AFUE 81
%8
1%
Temperature Rise - °F 30 - 60 25 - 55
Gas Supply Connection (FPT) - in. 1/
21
/2
Min. Recommended Gas Supply Pressure 5 in. w.g. Natural Gas, 11 in. w.g. LPG/Propane
1

Page 9
Electrical
ELECTRIC HEAT DATA — LRP14HP Only
Model No.LRP14HP24 LRP14HP30LRP14HP36
208/230V 208/230V 208/230V
Compressor Rated Load Amps 10.9 13.5 15.4
Locked Rotor Amps59.3 72.5 83.9
Outdoor Fan
Motor
Full Load Amps 1.0 1.0 1.0
Locked Rotor Amps1.9 1.9 1.9
Indoor
Blower Motor
Full Load Amps 2.8 2.8 4.1
Locked Rotor Amps3.9 3.9 4.4
1Maximum
Overcurrent
Protection
Voltage 208V 240V 208V 240V 208V 240V
Unit only, no electric heat 25 25 30 30 35 35
5 kW 30 30 30 30 30 35
7.5 kW 40 45 40 45 40 45
10 kW 50 60 50 60 50 60
15 kW Circuit 1 - - - - - - 50 60 50 60
Circuit 2-- - - - - 25 30 25 30
1Maximum Overcurrent
Protection with Optional
Single-Point Power
Supply
5 kW 45 45 45 50 50 50
7.5 kW 60 60 60 60 60 70
10 kW 70 70 70 80 70 80
15 kW - - - - - - 90 100 100 110
2Minimum
Circuit
Ampacity
Unit only, no electric heat 17.4 17.4 20.7 20.7 24.4 24.4
5 kW 25.4 28.8 25.4 28.8 26.7 30.1
7.5 kW 36.7 41.9 36.7 41.9 38 43.2
10 kW 47.9 54.9 47.9 54.9 49.2 56.2
3Circuit 1 - - - - - - 47.9 54.9 49.2 56.2
Circuit 2-- - - - - 22.6 26 22.6 26
2Minimum Circuit
Ampacity with Optional
Single-Point Power
Supply
5 kW 39.1 42.4 42.3 45.7 46 49.4
7.5 kW 50.3 55.6 53.6 58.8 57.2 62.5
10 kW 61.6 68.6 64.8 71.8 68.5 75.5
15 kW - - - - - - 87.4 97.8 91.1 101.5
NOTE - All units have a minimum Short Circuit Current Rating (SCCR) of 5000 amps.
NOTE - Extremes of operating range are plus and minus 10% of line voltage.
1HACR type breaker or fuse.
2
3A separate compressor circuit is required.

Page 10
ELECTRIC HEAT DATA — LRP14HP Only (Contd.)
Model No.LRP14HP42 LRP14HP48 LRP14HP60
208/230V 208/230V 208/230V
Compressor Rated Load Amps 15.9 18 24.3
Locked Rotor Amps85117 144.2
Outdoor Fan
Motor
Full Load Amps 1.7 1.7 1.7
Locked Rotor Amps3.2 3.2 3.2
Indoor
Blower Motor
Full Load Amps 2.8 2.8 7.6
Locked Rotor Amps5.4 6.8 - - -
1Maximum
Overcurrent
Protection
Voltage 208V 240V 208V 240V 208V 240V
Unit only, no electric heat 40 40 45 45 60 60
5 kW 30 30 30 30 35 35
7.5 kW 40 45 40 45 45 50
10 kW 50 60 50 60 60 60
15 kW Circuit 1 50 60 50 60 60 60
Circuit 225 30 25 30 25 30
20 kW Circuit 1 50 60 50 60 50 60
Circuit 250 60 50 60 50 60
1Maximum Overcurrent
Protection with Optional
Single-Point Power
Supply
5 kW 50 50 60 60 80 80
7.5 kW 60 70 70 70 80 90
10 kW 70 80 80 80 90 100
15 kW 100 110 100 110110 125
20 kW 125 150 125 150 150 150
2Minimum
Circuit
Ampacity
Unit only, no electric heat 24.4 24.4 27 27 39.7 39.7
5 kW 25.4 28.8 25.4 28.8 30.2 33.6
7.5 kW 36.7 41.9 36.7 41.9 41.5 46.7
10 kW 47.9 54.9 47.9 54.9 52.7 59.7
15 kW Circuit 1 47.9 54.9 47.9 54.9 52.7 59.7
Circuit 2 22.6 26 22.6 26 22.6 26
20 kW Circuit 1 47.9 54.9 47.9 54.9 52.7 59.7
Circuit 2 45.1 52.1 45.1 52.1 45.1 52.1
2Minimum Circuit
Ampacity with Optional
Single-Point Power
Supply
5 kW 45.3 48.7 47.9 51.3 60.6 64
7.5 kW 56.6 61.8 59.2 64.4 71.9 77.1
10 kW 67.8 74.8 70.4 77.4 83.1 90.1
15 kW 90.4 100.8 93.1 103.4 105.7 116.1
20 kW 112.9 126.8 115.6 129.4 128.2 142.1
NOTE - All units have a minimum Short Circuit Current Rating (SCCR) of 5000 amps.
NOTE - Extremes of operating range are plus and minus 10% of line voltage.
1HACR type breaker or fuse.
2
3A separate compressor circuit is required.