Lennox LGA Series User Manual

Page 7
SPECIFICATIONS GAS HEAT
Gas Heating
Performance
Heat Input Type Standard (2 Stage)
Medium (2 Stage) High (2 Stage)
Input − Btuh (KW) First Stage 169,000 (49.5) 234,000 (68.6) 312,000 (91.4)
Second Stage 260,000 (76.2) 360,000 (105.5) 480,000 (140.6)
Output − Btuh (kW) First Stage − − − − − − − − −
Second Stage 208,000 (60.9) 288,000 (84.4) 384,000 (112.5)
CSA Thermal Efficiency 80.0%
Gas Supply Connections 1 in. npt
Recommended Gas Supply Pressure − Natural 7 in. w.g. (1.7 kPa)
LPG/Propane 11 in. w.g. (2.7 kPa)
HIGH ALTITUDE
Units may be installed at altitudes up to 2000 feet (610 m) above sea level without any modi-
fication. At altitudes above 2000 feet (610 m), units must be derated to match gas manifold
pressures shown in table below. NOTE − This is the only permissible derate for these units.
Altitude − ft. (m)
Natural Gas LPG/Propane
in. w.g. kPa in. w.g. kPa
2001 − 3000 (610 − 915) 3.6 0.90 10.2 2.54
3001 − 4000 (915 − 1220) 3.5 0.87 9.9 2.46
4001 − 5000 (1220 − 1525) 3.4 0.85 9.6 2.39
5001 − 6000 (1525 − 1830) 3.3 0.82 9.4 2.34
6001 − 7000 (1830 − 2135) 3.2 0.80 9.1 2.26
7001 − 8000 (2135 − 2440) 3.1 0.77 8.8 2.19
ELECTRIC HEAT CAPACITIES
Volts
Input
30 kW
45 kW 60 kW 90 kW 120 kW
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
No. of
Steps
208 22.5 76,800 1 33.8 115,300 2 45.0 153,600 2 67.6 230,700 2 90.2 307,800 2
220 25.2 86,000 1 37.8 129,000 2 50.4 172,000 2 75.6 258,000 2 100.8 344,000 2
230 27.5
93,900 1 41.3 141,000 2 55.1 188,000 2 82.7 282,200 2 110.2 376,100 2
240 30.0
102,400 1 45.0 153,600 2 60.0 204,800 2 90.0 307,100 2 120.0 409,500 2
440
25.2 86,000 1 37.8 129,000 2 50.4 172,000 2 75.6 258,000 2 100.8 344,000 2
460 27.5 93,900 1 41.3 141,000 2 55.1 188,000 2 82.7 282,200 2 110.2 376,100 2
480 30.0
102,400 1 45.0 153,600 2 60.0 204,800 2 90.0 307,100 2 120.0 409,500 2
550
25.2 86,000 1 37.8 129,000 2 50.4 172,000 2 75.6 258,000 2 100.8 344,000 2
575 27.5 93,900 1 41.3 141,000 2 55.1 188,000 2 82.7 282,200 2 110.2 376,100 2
600
30.0 102,400 1 45.0 153,600 2 60.0 204,800 2 90.0 307,100 2 120.0 409,500 2
ELECTRICAL DATA
3 compressors
ModelNo. LGA/LCA360H (R−22) LGA/LCA360H (R−410A)
Linevoltagedata−60Hz−3phase 208/230V 460V 575V 208/230V 460V 575V
Compressors (3)
Rated load amps each (total) 30.1 (90.3) 15.5 (46.5) 12.1 (36.3) 33.3 (99.9) 17.9 (53.7) 11.5 (34.5)
Locked rotor amps each (total) 225 (675) 114 (342) 80 (240) 239 (717) 125 (375) 80 (240)
Condenser
FanMotors (6)
Fullloadamps each(total) 2.4 (14.4) 1.3 (7.8) 1 (6) 2.4 (14.4) 1.3 (7.8) 1 (6)
Lockedrotoramps each (total) 4.7 (28.2) 2.4 (14.4) 1.9 (11.4) 4.7 (28.2) 2.4 (14.4) 1.9 (11.4)
Evaporator
Blower Motor
Motor Output − hp 5 7.5 10 5 7.5 10 5 7.5 10 5 7.5 10 5 7.5 10 5 7.5 10
kW 3.7 5.6 7.5 3.7 5.6 7.5 3.7 5.6 7.5 3.7 5.6 7.5 3.7 5.6 7.5 3.7 5.6 7.5
Fullloadamps 16.7 24.2 30.8 7.6 11 14 6.1 9 11 16.7 24.2 30.8 7.6 11 14 6.1 9 11
Lockedrotoramps 105 152 193 45.6 66 84 36.6 54 66 105 152 193 45.6 66 84 36.6 54 66
1
Maximum Overcurrent
Protection (amps)
With Exhaust Fans 150 150 175 80 80 90 60 60 70 175 175 175 90 90 100 60 60 60
Less Exhaust Fans 150 150 150 80 80 80 60 60 60 150 175 175 90 90 90 60 60 60
2
Minimum
Circuit Ampacity
With Exhaust Fans 137 144 151 70 74 77 55 58 60 147 155 161 78 81 84 53 56 58
Less Exhaust Fans 129 137 143 66 70 73 52 55 57 140 147 154 74 77 80 50 53 55
Optional
PowerExhaust Fans
(No.)Horsepower (W) (3) 1/3 (249) (3) 1/3 (249) (3) 1/3 (249) (3) 1/3 (249) (3) 1/3 (249) (3) 1/3 (249)
Fullloadamps(total) 7.2 3.9 3 7.2 3.9 3
Lockedrotoramps(total) 14.1 7.2 5.7 14.1 7.2 5.7
Service Outlet (2) 115 volt GFCI (amp rating) 15 15 15 15 15 15
NOTE− Extremesofoperatingrangeareplusandminus10%oflinevoltage.
1 HACR type breaker or fuse.
2
RefertoNational or CanadianElectricalCodemanualtodeterminewire,fuseanddisconnectsizerequirements.

Lennox LGA Series Specifications

General

Brand	Lennox
Model	LGA Series
Category	Heat Pump
Language	English