Chromalox PF421-6 specifications Wiring, Operation, Maintenance

Models: PF421-6

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WIRING

WIRING

ELECTRIC SHOCK HAZARD. Disconnect all power before installing or servicing heater. Failure to do so could result in personal injury or property dam- age. Heater must be installed by a qualified person in accordance with the National Electrical Code, NFPA 70.

ELECTRIC SHOCK HAZARD. Any installation involv- ing electric heaters must be performed by a quali- fied person and must be effectively grounded in accordance with the National Electrical Code to eliminate shock hazard.

Note: Electrical wiring is to be in accordance with National Electrical Code.

1.Electrical wiring enters heater case through 7/8” opening in back of heater.

2.Grounding conductor, with green insulation, should be secured under green colored ground screw located in wiring compartment. (See Figures 1 and 2).

3.HVT Model only — The white insulated lead of the incoming power line should be attached to the L1 terminal of the terminal block. (See Figure 2)

4.Replace cover and end screws (removed in step 4, MOUNTING section).

Heaters Figure 1

OPERATION Ground

Ground MAINTENANCE

Heaters Manual background

L1 L2

Thermostat

Figure 1

Figure 2

OPERATION

FIRE HAZARD. Keep combustible materials and such fabrics at least 4” away from front of cover or above cover. Failure to comply could result in per- sonal injury or property damage.

FIRE/EXPLOSION HAZARD. This heater is not intended for use in hazardous atmospheres where flammable vapors, gases, liquids or other com- bustible atmospheres are present as defined in the National Electrical Code. Failure to comply can result in personal injury or property damage.

MAINTENANCE

ELECTRIC SHOCK HAZARD. Disconnect all power before installing or servicing heater. Failure to do so could result in personal injury or property dam- age. Heater must be installed by a qualified person in accordance with the National Electrical Code, NFPA 70.

1.Following long periods of idleness, heater should be vacuumed before start-up to remove accumulated combustible particles which will incinerate causing smoking and consequent wall dis- coloration.

2.If heater is located in areas of heavy traffic, furnish suitable heater guard (wall mounted pipe rail in front of case, for example) to pre- vent damage to heater.

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Chromalox PF421-6 specifications Wiring, Operation, Maintenance