Maintenance - Chromalox HD3D Installation, Operation And Maintenance Instructions

Maintenance

Turn off power to service heater. Do not at-
tempt to service or clean heater while unit is
operating as there is hazard of electric shock,
injury from operating fan, and burns from hot
heating elements.
ELECTRIC SHOCK HAZARD. Disconnect all
power before installing or servicing heater.
Failure to do so could result in personal injury
or property damage.
In order to optimize heater operating life and prevent
unexpected down time, preventative maintenance
should be preformed at least once per year, preferably
before start of heating season.
Renewal Parts Identification
ELEMENT CONFIGURATION
FOR 25 THRU 39 KW HEATERS
DETAIL OF UNIVERSAL
MOUNTING BRACKET
9
11
11
ELEMENT CONFIGURATION
FOR 15 THRU 20 KW
HEATERS
1. Turn off heater and allow to cool before performing
these maintenance procedures.
2. Fan motors in these heaters are provided with
sealed ball bearings, factory lubricated, requiring no
further lubrication under normal service conditions.
3. Vacuum or hose off heater with water (at city pres-
sure) before activating for next heating season to
remove accumulated dust or lint which otherwise
may smoke or incinerate on initial heat up.
4. Check internal and external wiring connections to
ensure they have not become loose.
5. Check motor hardware, including fan hub set screw
to ensure nothing has become loose. Do not over-
tighten. Torque value on set screw should be 35 in-
lbs. (3.95 N.m)
Note: Do not use high pressure cleaning systems.
22
24
10
11
8
ELEMENT
CONFIGURATION
FOR 2 THRU 12.5 KW
23
HEATERS
10
25
13