Service - Lennox LCH036 Installation Instructions Manual

L14 Reheat Coil Solenoid Valve
When Unit Controller input (Unit Controller J298-5 or
J299-8) indicates
dehumidification, L14 reheat valve is energized (Unit
Controller P269-3) and refrigerant is routed to the
reheat coil.
Reheat Setpoint
Reheat is factory-set to energize when indoor relative
humidity rises above 60% (default). Reheat will terminate
when the indoor relative humidity falls 3% (57% default)
or the digital output de-energizes.
Adjust reheat options using Unit Controller menu
SETTINGS > RTU OPTIONS > DEHUMIDIFIER.
Check-Out
Test hot gas 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 menu SERVICE > TEST >
DEHUMIDIFIER
The blower and compressor 1 (reheat) should be
operating. DEHUMIDIFIER 1 ON will appear on the Unit
Controller display
4- Press BACK on the Unit Controller display to stop the
testing mode.
Compressor 1 (reheat) and blower should de-energize.
Default Reheat Operation
TABLE 28
Reheat Operation - Two Cooling Stages - Default
T'stat and Humid­
ity Demands
Reheat Only Compressor 1 Reheat
Compressor 1 Reheat &
Reheat & Y1
Compressor 2 Cooling*
Compressor 1 Cooling &
Reheat & Y1 & Y2
Compressor 2 Cooling**
*If there is no reheat demand and outdoor air is
suitable, free cooling will operate.
**If there is no reheat demand and outdoor air is suitable,
free cooling and compressor 1 will operate.
room conditions require
Operation

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 four 20 X 25 X 2" filters. Filters
should be checked monthly and replaced when
necessary with filters of like kind and size. Take note of
air flow direction marking on filter frame when
reinstalling filters. See figure 31.
NOTE-Filters must be U.L.C. certified or equivalent for
use in Canada.
B-Lubrication
All motors are lubricated at the factory. No further
lubrication is required.
Page 41
CAUTION
WARNING
REMOVE FILTERS
PULL TO
REMOVE
FILTERS
FIGURE 31