Weather-Rite XT112 Installation, Operation & Service Manual - page 55
SECTION 17: S
EQUENCE
OF
O
PERATION
49
17.2 HVAC Remote Panels and Panel Options
The remote panel should be mounted in the conditioned space in a convenient location for controlling the air
handler. Do not locate a remote panel that contains temperature sensing equipment in an area directly
affected by the air handler or another heat source as it may interfere with the operation of the air handler.
17.2.1 Standard Discharge Control (SDC) Remote
This control is typically used for air handlers
providing space heating. The burner flame
modulates to maintain a constant discharge air
temperature as selected on the temperature
selection dial. While in "auto" mode, a space
temperature thermostat controls the operation of the
air handler to maintain the desired space
temperature.
AUTO/WINTER Mode:
The air handler (blower and burner) cycle on and off
to maintain space temperature as selected on the
room thermostat. When the air handler is operating,
air is being discharged at the setpoint on the
discharge temperature selection dial. The burner
flame modulates to maintain a constant discharge air
temperature as selected on the temperature
selection dial. The discharge air temperature setting
must be higher than the thermostat setting.
ON/WINTER Mode:
The air handler (blower and burner) operate
continuously to provide heated air. When the air
handler is operating, air is being discharged at the
setpoint on the discharge temperature selection dial.
The burner flame modulates to maintain a constant
discharge air temperature as selected on the
temperature selection dial. The unit disregards the
thermostat setpoint while in this mode.
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
Section 21 and Page 79, Section 23 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.
17.2.2 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