FORM: 9480 ECO 1-7255 REV. 01/17
3 OF 4
3480 / RCH SERIES CEILING HEATER
CAUTION:
To avoid the risk of fire, shock or personal injury;
do not insert or allow any foreign objects or hands to enter
any ventilation or exhaust openings.
THERMAL CUTOUT IDENTIFICATION
All 480V Models employ a automatic limit control. 208,
240 and 277V models have a capillary manual reset
limit control.
Models with capillary type manual reset limit control.
This device is located on the heater venturi (bottom of
unit as installed) with the capillary routed around the
outside of the element assembly.
THERMAL CUTOUT OPERATION
(WITH CAPILLARY MANUAL RESET)
To reset thermal cutout, first disconnect power from
the unit allowing time to cool, locate the two 1/4” dia.
openings in the front grille. Using a small screwdriver
or pencil press the reset button (with minimal amount
of force) through the 1/4” opening, then restore power
to the unit. If fault continues disconnect power and
check for causes.
THERMAL CUTOUT
(480 volt models)
If for any reason temperatures increase beyond normal
limits, safety thermal limit will open de-energizing
heating element and fan motor. Check entire installation
to determine cause of overheating and take corrective
measures. The limit control is the automatic reset type
and after cooling will reset, allowing heater to resume
operation.
OPERATION
1
.Turn on the power supply to heater.
2.Rotate thermostat knob fully clockwise.
3.Allow the room to reach desired temperature, then rotate thermostat knob counter clockwise until the heater de-energizes.
MAINTENANCE AND CLEANING
DISCONNECT POWER BEFORE ATTEMPTING ANY SERVICE
The heater should be cleaned at least annually to prevent excess build-up of dirt and lint accumulated under normal
operating conditions. In an unusually dirty environment the cleaning should be done more often. Using a vacuum cleaner
with soft brush attachment, clean the the intake and discharge openings of any accumulated dirt or lint. The fan blade and
elements may be cleaned after removing the front cover. The face plate can be cleaned with damp cloth and mild detergent.
The factory installed louvered diffuser can be adjusted to
direct air flow as desired. If necessary the louvered diffuser
can be rotated 90 degrees by removing the four mounting
screws and turning the louvered diffuser to the desired
position and attaching to the grille. Care must be taken to
align the notched corners of the diffuser frame with the reset
holes in the grille. The louvered diffuser cannot be used in
conjunction with the standard circular outlet.
OPTIONAL LOUVERED DIFFUSER