Page 34
TABLE 6
LG/LC 036SU NORMAL OPERATING PRESSURES
Outdoor Coil
Entering Air Temp
Discharge
+10 psig
Suction +
psig
o
232 146
o
267 149
o
307
o
100
o
400
o
TABLE 7
LG/LC 048U NORMAL OPERATING PRESSURES
Outdoor Coil
Entering Air Temp
Discharge
+10 psig
Suction +
psig
o
142
o
289
o
332 147
o
379 149
100
o
428
o
484
TABLE 8
LG/LC 060U NORMAL OPERATING PRESSURES
Outdoor Coil
Entering Air Temp
Discharge
+10 psig
Suction +
psig
o
261
o
299 138
o
341 140
o
388 142
100
o
441 144
o
499 146
TABLE 9
LG/LC 060U NORMAL OPERATING PRESSURES
Outdoor Coil
Entering Air Temp
Discharge
+10 psig
Suction +
psig
o
268 128
o
307 134
o
137
o
399 140
100
o
142
o
144
TABLE 10
SUBCOOLING TEMPERATURE
Unit Liquid Saturated Temp. Minus
Liquid Temperature
036U
+
048U
+
060U
+
074U
+
V- SYSTEMS SERVICE CHECKS
A-Heating System Service Checks
-
cation.
Before checking piping, check with gas company or au-
thorities having jurisdiction for local code requirements.
Refer to the LGM Installation instruction for more infor-
mation.
UNIT
GROUND
JOINT UNION
MANUAL MAIN
SHUT-OFF VALVE
(REFER TO LOCAL CODES)
GAS PIPING
SUPPORT
DRIP LEG
ROOF
MOUNTING
FRAME
GAS PIPING COMPONENTS
REFER TO INSTALLATION INSTRUCTIONS
VALVE
CAP HERE
TO ISOLATE
VALVE WHEN
PRESSURE
TESTING
LINE
FIGURE 24
1-Gas Piping
(124.3 Pa) drop in pressure between the gas meter and
the unit. Supply gas pipe must not be smaller than the
unit gas connection. Refer to installation instructions for
details.
2-Testing Gas Piping
NOTE- In case shutdown is required, turn o the main
manual shut-o valve and disconnect the main power to
the unit. These controls should be properly labeled by the
installer.
When pressure testing gas lines, the gas valve must be
disconnected and isolated. Gas valves can be damaged if
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