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Your indoor evaporator coil is equipped with a drain pan
to collect condensate formed as your system removes
humidity from the inside air. Have your dealer show you
where the main condensate drain (and auxiliary drain, if
applicable) runs and how to check the drain for any ob-
struction.
It is also very important to provide unrestricted airflow to
the outdoor unit. Leaves, trash or shrubs crowding the
unit cause the outdoor unit to work harder and use more
energy. Keep shrubbery trimmed away from the unit and
periodically check for debris which may have collected
around the unit.
Thermostat Operation
Though your thermostat may vary somewhat from the
description below, its operation will be similar.
Temperature Setting Levers
Set the lever or dial to the desired temperature setpoints
for both heating and cooling. Avoid frequent temperature
adjustment; turning the unit off and back on before pres-
sures equalize puts stress on the unit compressor.
Fan Switch
In AUTO or INT (intermittent) mode, the blower operates
only when the thermostat calls for heating or cooling.
This mode is generally preferred when humidity control
is a priority. The ON or CONT mode provides continuous
indoor blower operation, regardless of whether the com-
pressor or furnace is operating. This mode is required
when constant air circulation or filtering is desired.
System Switch
Set the system switch for heating, cooling or auto opera-
tion. The auto mode allows the system to automatically
switch from heating mode to cooling mode to maintain
predetermined comfort settings.
Temperature Indicator
The temperature indicator displays the actual room
temperature.
Programmable Thermostats
Your Lennox system may be controlled by a
programmable thermostat. These thermostats provide
the added feature of programmable time-of-day setpoints
for both heating and cooling. Refer to the user’s
information manual provided with your particular
thermostat for operation details.
Preservice Check
If your system fails to operate, check the following before
calling for service:
Check to see that all electrical disconnect switches
are ON.
Make sure the room thermostat temperature
selector is properly set.
Make sure the room thermostat system switch is
properly set.
Replace any blown fuses, or reset circuit breakers.
Make sure unit access panels are in place.
Make sure air filter is clean.
Locate unit model number and have it handy
before calling.
Check Points
Start−Up and Performance Check List
Job Name
Job Location
Installer
Unit Model No.
Nameplate Voltage
Minimum Circuit Ampacity
Maximum Overcurrent Protection Size
Refrigerant Lines:
Service Valves Fully Opened?
Outdoor Fan Checked?
Job No.
City
City
Serial No.
Date
State
State
Service Technician
Amps:
Compressor Amperage:
Indoor Filter Clean?
Electrical Connections Tight?
Supply Voltage (Unit Off)
First Stage
Thermostat
Refrigerant Charge Checked?
Calibrated?
Properly Set?
Level?
Properly Insulated?
Voltage With Compressor Operating
Leak Checked?
Service Valve Caps Tight?
Indoor Blower RPM
Outdoor Coil Entering Air Temp.
Liquid Pressure:
S.P. Drop Over Indoor (Dry)
first−stage
second−stage
First Stage
Vapor Pressure:
Second Stage
Second Stage
first−stage
second−stage
