Page 44
LGH/LCH036, 048, 060, 072
COOLING MODE REFRIGERANT ROUTING
REHEAT
COIL
EVAPORATOR
REHEAT
VALVE
RETURN
AIR
CONDENSER
COIL
OUTDOOR
AIR
COMPRESSOR
SUPPLY
AIR
CHECK
VALVE
EXPANSION
VALVE
FIGURE 29
COIL
Check-Out
Test reheat operation using the following procedure.
1- Make sure reheat is wired as shown in wiring section.
2- Make sure unit is in local thermostat mode.
3- Use Unit Controller key pad to elect SERVICE >
TEST > DEHUMIDIFIER.
The blower and compressor (reheat) should be
operating. DEHUMIDIFIER 1 ON will be appear on the
Unit Controller display.
4-
Press BACK on the Unit Controller display to stop the
testing mode.
Compressor (reheat) and blower should de-energize.
Default Reheat Operation
During reheat mode free cooling is locked out.
No Y1 demand but a call for dehumidification:
Compressor is operating, blower is on, and the reheat
valve is energized.
Y1 demand:
Compressor is operating, blower is on, and the reheat
valve is energized.
Y2 demand:
Compressor is operating, blower is on, and the reheat
valve is de-energized.
Service
The unit should be inspected once a year by a qualified
service technician.
CAUTION
Label all wires prior to disconnection when servic
ing controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.
WARNING
The State of California has determined that this
product may contain or produce a chemical or
chemicals, in very low doses, which may cause se
rious illness or death. It may also cause cancer,
birth defects, or reproductive harm.
A-Filters
Units are equipped with temporary filters which must be
replaced prior to building occupation. See table 32 for
correct filter size. Refer to local codes or appropriate
jurisdiction for approved filters.
