Manual

3
OPTIONAL EQUIPMENT
LOW TEMPERATURE LIMIT SWITCH
This control is commonly called a Freeze Stat. This unit mounted, low limit thermostat will shut the
blower off if the discharge temperature drops below 40
°
F. A Bypass Timer which is part of the control will
allow the unit to run on a cold start-up. After 5 minutes, control power will pass through the low
temperature thermostat. If the remote panel has operating lights, the red light will glow on "ALARM".
Turn the unit
OFF
, and back
ON
, to reset the Bypass Timer.
FLAME FAILURE RELAY
A relay is interlocked with the burner control module. When the burner fails to light within the allowable
time (30 seconds), the relay is energized, which opens the circuit to the blower starter, and shuts the unit
down. If the remote panel has operating lights, the red light will glow on "ALARM". Turn the unit
OFF
,
then back
ON
and then reset the burner control module.
MILD WEATHER THERMOSTAT
This control is often called an "Intake Air Thermostat". The sensing element of the thermostat is mounted
in the incoming air supply to the unit. If the temperature exceeds the setting of the thermostat, the burner
will de-energize. The burner will re-ignite when the outside air temperature falls below the thermostat set
point.
REMOTE CONTROL PANEL
This consists of either a three position “SUMMER-OFF-WINTER” switch in a flush mounting stainless
steel bezel plate and masonry box or two toggle switches (“FAN ON/OFF” and “HEATER ON/OFF”) in a
flush mounting stainless steel bezel plate on the kitchen hood face.
REMOTE CONTROL PANEL WITH INDICATOR LIGHTS
Up to four labeled pilot lights are mounted on the face of the remote control panel, indicating primary
functions of the unit. The “SUMMER-OFF-WINTER” switch is included next to the pilot lights.
1 - Green - Blower Run Light – “BLOWER”
1 - Green - Burner On Light – “BURNER”
1 - Red - Low Temperature Failure Light – “ALARM”
1 - Red - Flame Failure Shut Down Light – “ALARM”
1 - Red - Clogged Filter Light – “FILTERS”
A minimum of two lights is available. If more than the standard 4-light panel is required, a circuit analyzer
panel must be used.
CLOGGED FILTER SWITCH WITH INDICATOR LIGHT
A pressure sensitive switch, mounted in the unit, will sense the air pressure drop across the filter. When
the filter becomes dirty, the switch will activate a light on the remote control panel, indicating a filter
change is required.
PREPURGE TIMER
A timer allows the unit blower to run for 1 minute, purging any gas residue in the unit, before the burner
circuit is allowed to energize.
TIME CLOCK
A time clock cycles the unit
ON
and
OFF
, at selected times of the day. This time clock can also "skip"
selected days, as needed.
115V DUPLEX SERVICE RECEPTACLE
The receptacle is mounted to the outside of the unit in a weatherproof enclosure. It provides power for
service equipment when the main power to the unit is shut off for service work. It requires a separate
115V circuit.