Lennox DAVE SIGNATURE CBX32MV Manual page 44

humidity from the inside air. Have your dealer show
you the location of the drain line and how to check for
obstructions. (This would also apply to an auxiliary
drain, if installed.)
Thermostat Operation
®
See the iComfort Wi-Fi thermostat homeowner manual
for instructions on how to operate your thermostat.
Heat Pump Operation
Your new Lennox heat pump has several characteristics
that you should be aware of:
S
Heat pumps satisfy heating demand by delivering
large amounts of warm air into the living space. This
is quite different from gas‐ or oil‐fired furnaces or an
electric furnace which deliver lower volumes of
considerably hotter air to heat the space.
S
Do not be alarmed if you notice frost on the outdoor coil
in the winter months. Frost develops on the outdoor
coil during the heating cycle when temperatures are
below 45F (7C). The heat pump control activates a
XP25 Start-Up and Performance Checklist
Customer
Indoor Unit Model
Outdoor Unit Model
Solar Module Mfg and Model
Notes:
START-UP CHECKS
Refrigerant Type:
Rated Load Amps
Condenser Fan Full Load Amps
COOLING MODE
Vapor Pressure:
Supply Air Temperature:
HEATING MODE
Vapor Pressure:
Supply Air Temperature:
System Refrigerant Charge (Refer to manufacturer's information on unit or installation instructions for required
subcooling and approach temperatures.)
Subcooling:
Approach:
Indoor Coil Temp. Drop (18 to 22°F)
S
If your system fails to operate, check the following before
calling for service:
S
S
S
S
S
S
Actual Amps
Actual Amps:
Liquid Pressure:
Ambient Temperature:
Liquid Pressure:
Ambient Temperature:
Saturated Condensing Temperature (A)
minus Liquid Line Temperature (B)
Liquid Line Temperature (A)
minus Outdoor Air Temperature (B)
Return Air Temperature (A)
minus Supply Air Temperature (B)
Page 16
defrost cycle lasting 5 to 15 minutes at preset intervals
to clear the outdoor coil of the frost.
During the defrost cycle, you may notice steam rising
from the outdoor unit. This is a normal occurrence.
The thermostat may engage auxiliary heat during the
defrost cycle to satisfy a heating demand; however,
the unit will return to normal operation at the
conclusion of the defrost cycle.
Preservice Check
Verify room thermostat settings are correct.
Verify that all electrical disconnect switches are ON.
Check for any blown fuses or tripped circuit breakers.
Verify unit access panels are in place.
Verify air filter is clean.
If service is needed, locate and write down the unit
model number and have it handy before calling.
Address
Serial
Serial
Serial
Rated Volts
Return Air Temperature:
Return Air Temperature:
A — B
A — B
A — B
Actual Volts
= SUBCOOLING
= APPROACH
= COIL TEMP DROP