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1. Connect heater only to the voltage, frequency and phase spec-
ified on the nameplate.
2. All wiring should be done according to local and National
Electric Codes.
3. Make supply connections to marked heater terminals using
wire suitable for 75°C. (Type RH-RW or equivalent).
4. Conduit attachment to heater:
a. Run conduit(s) to conduit entrance plate. (See Figure 1).
b. Mark plate where conduit(s) will enter plate.
c. Remove screws and plate.
d. Punch conduit entrance plate with a hole(s) to accommo-
date the required conduit(s).
e. Reinstall plate and install conduit(s) to plate.
Fan Interlock. The fan circuit must be interlocked with the
control circuit of the heater. Refer to the wiring diagram in the
heater terminal box.
Air Flow Switch
Fintube Heating
Element
Static equalizers
(not shown) maintain
uniform air flow
across the heater
face when individual
fintubes are omitted.
Air Flow Switch Automatic and Manual Reset
(not shown)
Contact your local Chromalox Sales Office with Complete heater catalog number or part number.
WIRING
WIRING DIAGRAM
The appropriate wiring diagram
will be supplied with each heater.
RENEWAL PARTS IDENTIFICATION
Typical DHIF Duct Heater
Conduit Entrance Plate
Main Disconnect
Fusing
-6-
Hazard of electrical shock. Any installation involv-
ing electric heaters must be grounded to earth to
eliminate shock hazard.
Control Ratings
Manual Limit Control
Pilot
Non-Inductive
Volts
Duty
Rating
120
125 VA
3000 Watts
208
125 VA
5200 Watts
240
125 VA
6000 Watts
277
125 VA
6925 Watts
Hazard of severe shock. Disconnect all power to
heater before servicing.
Transformer Fusing
Transformer
Contactor
Automatic Limit Control
Pilot
Non-Inductive
Duty
Rating
125 VA
3000 Watts
125 VA
5200 Watts
125 VA
6000 Watts
125 VA
6925 Watts
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