Service; Caution - Lennox LGH 036 Installation Instructions Manual

EVAPORATOR
COIL
REHEAT
COIL
SUPPLY
AIR
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- Select Unit Controller Service - Test.
The blower and compressor 1 (reheat) should be
operating. Reheat mode will be appear on the Unit
Controller display.
4- Deselect Unit Controller Service - Test.
Compressor 1 (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.
LGH/LCH036, 048, 060, 072
COOLING MODE REFRIGERANT ROUTING
RETURN
AIR
EXPANSION
VALVE
CHECK
VALVE
FIGURE 30
COMPRESSOR

Service

The unit should be inspected once a year by a qualified
service technician.
Label all wires prior to disconnection when servic­
ing controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.
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.
Page 43
OUTDOOR
AIR
CONDENSER
COIL
REHEAT
VALVE

CAUTION

WARNING