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DH and DHOC Electric Duct Heaters
General
Read and understand all instructions before in-
stalling, servicing or operating product. Failure
to do so could result in personal injury or prop-
erty damage.
These heaters are designed to be installed in either a
horizontal or vertical duct in one of the six positions
shown in figure 12. The heater is constructed with in-
dividual metal sheath fintube elements mounted to a
heavy gauge metal terminal box.
Due to the various options and materials available,
check the nameplate attached to the heater terminal
box with the catalog number designation system be-
fore installing to insure the heater you received con-
forms to your specification.
Please read these directions carefully to insure all limi-
tations are properly observed and all wiring and con-
trols are properly installed and connected.
IMPORTANT - Observe at least one complete heat-
ing cycle operation before leaving the installation.
Installation
Limitations: Must be in accordance with one of the
following: Standards of the National Fire Protection
Association for the installation of Air Conditioning and
Ventilating Systems of other than Resident Type (Pam-
phlet 90A) or Residential Type Warm Air Heating and
Air Conditioning Systems (Pamphlet 90B).
NOTE: The minimum distances shown are limitations.
Wherever possible, locate as far away from these lim-
its as practical. In any case, this distance with any re-
quired airflow correction must be sufficient to accom-
plish even air flow at a velocity equal to, at least, the
minimum stated on the heater nameplate.
FIRE/EXPLOSION HAZARD. This heater is not
intended for use in hazardous atmospheres
where flammable vapors, gases, liquids or
other combustible atmospheres are present as
defined in the National Electrical Code. Failure
to comply can result in personal injury or prop-
erty damage.
ELECTRIC SHOCK HAZARD. Any installation
involving electric heaters must be performed
by a qualified person and must be effective-
ly grounded in accordance with the National
Electrical Code to eliminate shock hazard.
ELECTRIC SHOCK HAZARD. Disconnect all
power before 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.
1. Installation near heat pump, central air conditioner,
filters or humidifier. (Refer to Figure 1).
Heat Pump,
Central Air Conditioner,
Filters or Humidifier
3
Duct Heater
4 Ft.
Min.
Figure 1
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