Chromalox UB-4002A - Manual (Page 9)

9
OPERATION
MAINTENANCE
1. DANGER: Hazard of Fire.
A. Do not restrict air flow through heater by placing fabric or
other obstructions in front of or behind the heater. Increased
discharge temperatures can discolor or ignite some heat
sensitive combustible materials.
B. Do not operate heater in areas where combustible lint, dust
or flammable vapors, gases or liquids are present.
2. Do not operate heater in corrosive atmosphere conditions to
avoid destructive damage to heater.
3. Avoid operating heater in dusty environment which can foul
heater fins to dissipate heat or impair motor ventilation leading
to excessive operating temperatures.
4. Do not operate heater in ambient temperatures exceeding 90 O F.
WARNING: Turn off all power to service heater. Do
not attempt to service heater while unit is operat-
ing as there is hazard of electric shock, injury from
operating fan, and burns from hot heating ele-
ments.
1. Fan motors in these heaters are provided with sealed ball bear-
ings, factory lubricated, requiring no further lubrication under
normal service conditions.
2. Vacuum heater before activating heater for next heating season
to remove accumulated dust or lint which otherwise may
smoke or incinerate on initial heat up.
3. Periodically inspect all electrical connections and terminals to
avoid electrical wiring difficulties. Inspect all wiring for frayed
or worn insulation.