2
OPERATING SEQUENCE
HEATING
1. The thermostat initiates the heating cycle activating the controller and the
elements of the first heating stage. The blower starts at low speed and at the same
time the first two elements turn on. Their respective indicator lights display
heating element activity.
2. Approximately 10 seconds after the first two elements activate, the other
elements turn on in sequence, one at a time. The blower fan increases speed as
each element turns on. After all elements are active the controller enters into
automatic modulating mode (if selected) maintaining a comfortable delivered air
temperature.
COOLING
The thermostat activates the air conditioning cycle. The blower starts at cooling
speed and the A/C condenser is activated. After approximately 7 minutes of
cooling operation, the blower speed adjusts to the latent cooling mode to
maximize dehumidification. This cycle is cancelable at the dipswitch on the
furnace controller if conventional high speed sensible only cooling is preferred.
The selection of the modulation or non modulating function must be performed by
a qualified technician.
WARNING
;FAILURE TO FOLLOW PROPER PROCEDURE MAY
RESULT IN SERIOUS HARM OR DEATH.
MANUAL CONTROLS (fig 1)
The POWER option and CONTINUOUS FAN switches are located on the fur-
nace upper panel.
When the POWER switch is set to “MAX”, all heating elements are operational.
When the POWER switch is set to “MODERATE”, the furnace operates at re-
duced heating capacity. This option is best suited to spring and fall conditions or
periods of low heat demands.
