SECTION 18: SEQUENCE OF OPERATION
111 o f 14 7
ON/SUMMER Mode:
Only the blower operates continuously to provide
unheated air. The burner remains off regardless of
temperatures on the temperature selection dial and
thermostat.
FAN ON indicator:
Indicates that the air handler is supplying power to
the blower motor via the M1 motor starter.
BURNER ON indicator:
Indicates that the air handler has supplied power to
open the main gas safety shut off valve.
BURNER LOCKOUT indicator:
The burner control module has experienced a fault
and will need to be reset. The burner control module
must be reset at the air handler. Refer to Page 124,
Section 20 and Page 136, Section 22 to determine
the cause of the fault.
CHECK FILTER indicator:
The airflow in the unit is insufficient to activate the low
pressure switch. This is most commonly caused by
dirty filters, but could also indicate other obstructions
in the air stream.
18
.2.3 Deluxe Temperature Control (DTC) Remote
This control is typically used for providing automatic
day/night space heating. The burner flame
modulates and varies the discharge air temperature
to maintain the space temperature set on the
Selectrastat dial. The 7-day programmable
touchscreen thermostat provides nighttime setback
for u noccupied space heating.
AUTO/WINTER Mode:
Occupied time: Blower and burner cycle operate
continuously to maintain a constant space
temperature as selected on the Selectrastat dial.
The burner flame fully modulates and varies the
discharge air temperature to maintain the space
temperature.
Unoccupied time: Blower and burner cycle on and off
to maintain space temperature as selected on the
touchscreen thermostat (night setback).
ON/WINTER Mode:
Blower and burner operate continuously to maintain
a constant space temperature as selected on the
Selectrastat dial. The burner flame modulates and
varies the discharge air temperature to maintain the
space temperature.
ON/SUMMER Mode:
Only the blower operates continuously to provide
unheated air. The burner remains off regardless of
temperatures on the temperature selection dial and
thermostat.
FAN ON indicator:
Indicates that the air handler is supplying power to
the blower motor via the M1 motor starter.
BURNER ON indicator:
Indicates that the air handler has supplied power to
open the main gas safety shut off valve.
BURNER LOCKOUT indicator:
The burner control module has experienced a fault
and will need to be reset. The burner control module
must be reset at the air handler. Refer to Page 124,
Section 20 and Page 136, Section 22 to determine
the cause of the fault.
CHECK FILTER indicator:
The airflow in the air handler is insufficient to activate
the low pressure switch. This is most commonly
caused by dirty filters but could also indicate other
obstructions in the air stream.
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