Lennox LGA Series User Manual

Page 55
TABLE 17
LGC/LCC Series 360 R410A − VAV
Outdoor
Coil En-
tering Air
Temp
CIRCUIT 1 CIRCUIT 2 CIRCUIT 3 CIRCUIT 4
DIs
+
10
psig
Suc
+
5
psig
Dis
+
10
psig
Suc
+
5
psig
DIs
+
10
psig
Suc
+
5
psig
DIs
+
10
psig
Suc
+
5
psig
65_F* 260 115 255 122 270 124 280 123
75_F 315 119 310 125 330 127 330 126
85_F 360 122 360 129 380 130 390 129
95_F 415 126 410 132 430 133 440 133
105_F 460 130 465 136 480 136 490 136
115_F 515 134 515 139 535 139 550 140
*Outdoor fans may cycle on and off at this temperature.
TABLE 18
LGA/LCA360H CAV with 3 compressors − R22
Outdoor
Coil En-
tering Air
Temp
CIRCUIT 1 CIRCUIT 2 CIRCUIT 3
DIs
+
10
psig
Suc
+
5
psig
Dis
+
10
psig
Suc
+
5
psig
DIs
+
10
psig
Suc
+
5
psig
65_F* 164 63 176 76 178 75
75_F 191 64 207 77 206 76
85_F 219 66 233 78 234 77
95_F 250 68 270 80 271 78
105_F 284 70 303 81 301 79
115_F 320 72 346 82 345 81
*Outdoor fans may cycle on and off at this temperature.
TABLE 19
LGA/LCA360H CAV with 3 compressors R410A
Outdoor
Coil En-
tering Air
Temp
CIRCUIT 1 CIRCUIT 2 CIRCUIT 3
DIs
+
10
psig
Suc
+
5
psig
Dis
+
10
psig
Suc
+
5
psig
DIs
+
10
psig
Suc
+
5
psig
65_F* 286 111 307 125 302 123
75_F 320 115 351 130 336 129
85_F 363 119 397 132 382 133
95_F 413 122 448 135 430 137
105_F 465 126 501 137 478 140
115_F 523 130 561 142 534 141
*Outdoor fans may cycle on and off at this temperature.
D−Charge Verification − Approach Method
1− Using the same thermometer, compare liquid temper-
ature to outdoor ambient temperature.
Approach Temperature = Liquid temperature minus
ambient temperature.
2− Approach temperature should match values in table
20. An approach temperature greater than value
shown indicates an undercharge. An approach tem-
perature less than value shown indicates an over-
charge.
3− Do not use the approach method if system pressures
do not match pressures in tables 6 through 19. The ap-
proach method is not valid for grossly over or under-
charged systems.
TABLE 20
Unit
Liquid Temp. Minus Ambient Temp.
1st Stage 2nd Stage 3rd Stage 4th Stage
248 R22
CAV/VAV
8°F+1
(4.4°C+
0.5)
8°F+1
(4.4°C+
0.5)
8°F+1
(4.4°C+
0.5)
8°F+1
(4.4°C+
0.5)
248
R410A
CAV
8°F+1
(4.4°C+
0.5)
8°F+1
(4.4°C+
0.5)
8°F+1
(4.4°C+
0.5)
8°F+1
(4.4°C+
0.5)
248
R410A
VAV
7°F+1
(3.9°C+
0.5)
7°F+1
(3.9°C+
0.5)
7°F+1
(3.9°C+
0.5)
7°F+1
(3.9°C+
0.5)
300H
R22 CAV
6°F+1
(3.3°C+
0.5)
7°F+1
(3.9°C+
0.5)
6°F+1
(3.3°C+
0.5)
6°F+1
(3.3°C+
0.5)
300H
R22 VAV
6°F+1
(3.3°C+
0.5)
6°F+1
(3.3°C+
0.5)
7°F+1
(3.9+
0.5)
9°F+1
(5.0+
0.5)
300H
R410A
CAV
8°F+1
(4.4°C+
0.5)
8°F+1
(4.4°C+
0.5)
8°F+1
(4.4°C+
0.5)
8°F+1
(4.4°C+
0.5)
300H
R410A
VAV
5°F+1
(2.8°C+
0.5)
5°F+1
(2.8°C+
0.5)
5°F+1
(2.8°C+
0.5)
8°F+1
(4.4°C+
0.5)
360
R22 CAV
6°F+1
(3.3°C+
0.5)
6°F+1
(3.3°C+
0.5)
7°F+1
(3.9+
0.5)
8°F+1
(4.4°C+
0.5)
360
R22 VAV
8°F+1
(4.4°C+
0.5)
8°F+1
(4.4°C+
0.5)
8°F+1
(4.4°C+
0.5)
10°F+1
(5.6°C+
0.5)
360
R410A
VAV
8°F+1
(4.4°C+
0.5)
8°F+1
(4.4°C+
0.5)
8°F+1
(4.4°C+
0.5)
10°F+1
(5.6°C+
0.5)
360
R410A
CAV
7°F+1
(3.9+
0.5)
7°F+1
(3.9+
0.5)
8°F+1
(4.4°C+
0.5)
8°F+1
(4.4°C+
0.5)
360H
R22
8°F + 1
(4.4‘°C +
0.5)
10°F + 1
(5.6°C +
0.5)
8°F + 1
(4.4°C +
0.5)
NA
360H
R410A
12°F + 1
(6.7°C +
0.5)
14°F + 1
(7.8°C +
0.5)
13°F + 1
(7.2°C +
0.5)
NA
E−Heating Start Up
FOR YOUR SAFETY READ BEFORE LIGHTING
BEFORE LIGHTING smell all around the appliance area
for gas. Be sure to smell next to the floor because some gas
is heavier than air and will settle on the floor.
Use only your hand to push in or turn the gas control knob.
Never use tools. If the knob will not push in or turn by hand,
do not try to repair it, call a qualified service technician.
Force or attempted repair may result in a fire or explosion.
WARNING
Electric shock hazard. Can cause
injury or death. Before attempting to
perform any service or maintenance,
turn the electrical power to unit OFF at
disconnect switch(es). Unit may have
multiple power supplies.

Lennox LGA Series Specifications

General

Brand	Lennox
Model	LGA Series
Category	Heat Pump
Language	English