Unit installation

8
OPERATION
MAINTENANCE AND TROUBLESHOOTING
Operating Heater
1. Once power is supplied to unit, both the fan motor and heating ele-
ments will immediately turn on.
2. When operating without thermostat control, the only way to manu-
ally turn unit on or off is via remote/integral disconnect switch or
circuit breaker.
3. All units are equipped with an automatic temperature cutout
switch. As such, units not equipped with a thermostat may auto-
matically shut off to protect fan motor and heating elements.
4. Unit may also be provided with an optional fan delay (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 counter-
clockwise direction (Low).
4. To turn the unit off, turn the dial in the counterclockwise direction
until it stops. You should be able to hear the contactors de-energiz-
ing.
LO HI
OFF
Chromalox
R
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 al-
low for power to be locally isolated from the heater.
2. The disconnect switch used on HVH models is a rotary style dis-
connect, designed for easy on/off operation.
3. To disconnect power from the HVH heater simply turn the rotary
dial in the counterclockwise direction so it is pointing at “0”.
ELECTRIC SHOCK HAZARD. Disconnect all power be-
fore 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 recom-
mended that preventative maintenance be performed on Chromalox
model HVH heaters. Recommended preventative maintenance in-
cludes:
1. Inspect and if necessary tighten fasteners attaching mounting
bracket to unit and wall/ceiling.
2. Inspect fan blade to make sure it is securely fastened to motor
shaft. Check set screw on collar to ensure it is tightened to recom-
mended torque of 165 inch-lbs.
3. Inspect fasteners on motor mount as it may be possible for vibra-
tion to cause loosening.
4. Inspect inlet grills and outlet louvers and remove any airborne de-
bris that may have become stuck.
5. Inspect control panel for any loose wire connections 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 instruc-
tions).
Heat Tracing Sales Mount Airy, Maryland USA 410-795-2223 [e-mail]
Heat Tracing Sales Mount Airy, Maryland USA 410-795-2223 [e-mail]