Advertisement
Operating Heater
1. Once power is supplied to unit, both the fan motor
and heating elements will immediately turn on.
2. When operating without thermostat control, the
only way to manually turn unit on or off is via re-
mote/integral disconnect switch or circuit breaker.
3. All units are equipped with an automatic temper-
ature cutout switch. As such, units not equipped
with a thermostat may automatically shut off to
protect fan motor and heating elements.
4. Unit may also be provided with an optional fan de-
lay (standard on units above 20kW) which enables
the fan to run for approximately one minute after
heating elements are turned off.
Operating Integral Mechanical Thermostat
1. Thermostat controlled units will turn on and off
based on the set point of the thermostat.
2. To increase the temperature set-point, turn the
thermostat dial in the clockwise direction (Hi).
3. To decrease the temperature set-point, turn the dial
in the counterclockwise direction (Low).
4. To turn the unit off, turn the dial in the counterclock-
wise direction until it stops. You should be able to
hear the contactors de-energizing.
Chromalox
Maintenance and Troubleshooting
ELECTRIC SHOCK HAZARD. Disconnect all
power before installing or servicing heater.
Failure to do so could result in personal injury
or property damage. Heater must be installed
or serviced by a qualified person in accordance
with the National Electrical Code, NFPA 70.
Preventative Maintenance
To optimize performance and prevent downtime, it is
recommended that preventative maintenance be per-
formed on Chromalox model HVH heaters. Recom-
mended preventative maintenance includes:
1. Inspect and if necessary tighten fasteners attach-
ing mounting bracket to unit and wall/ceiling.
LO
HI
R
OFF
Operating Integral Summer Fan Switch
1. Units equipped with fan switch can operate in two
modes: summer and winter. When operating in
summer mode, heating elements will not operate
(only fan). When operating in winter mode, both fan
motor and heating elements will operate.
2. To operate the unit in summer mode (Fan Only), flip
the toggle switch into the upward position.
3. To operate the unit in the winter mode (Fan + Heat),
flip the toggle switch into the downward position.
Operating Integral Disconnect Switch
1. Chromalox HVH models equipped with an integral
disconnect allow for power to be locally isolated
from the heater.
2. The disconnect switch used on HVH models is a
rotary style disconnect, designed for easy on/off
operation.
3. To disconnect power from the HVH heater simply
turn the rotary dial in the counterclockwise direc-
tion so it is pointing at "0".
2. Inspect fan blade to make sure it is securely fas-
tened to motor shaft. Check set screw on collar
to ensure it is tightened to recommended torque of
165 inch-lbs.
3. Inspect fasteners on motor mount as it may be
possible for vibration to cause loosening.
4. Inspect inlet grills and outlet louvers and remove
any airborne debris that may have become stuck.
5. Inspect control panel for any loose wire connec-
tions and replace frayed or damaged wires.
6. It is recommended that the fan motor be replaced
after 5 years or 10,000 hours or operation (see fan
motor replacement instructions).
12
Advertisement
Troubleshooting
