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INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS FOR INDEECO INDUSTRIAL GRADE UNIT HEATERS INSTALLATION, OPERATION AND MAINTENANCE
INSTRUCTIONS FOR INDEECO INDUSTRIAL GRADE
UNIT HEATERS
I. GENERAL
INDEECO industrial grade unit heaters are designed
to provide years of trouble free operation if properly
installed and maintained. Please read and follow
these instructions in installing and maintaining the
heater.
II. INSTALLATION This unit heater should only be
installed by personnel qualified to make suspended
over head mechanical installations and NEC/CEC
qualified electrical installations.
A. Site selection
1.

INDEECO industrial grade unit heaters are
designed for permanent wall or ceiling mounting.
2.

The heaters are designed to operate in a horizontal
position only.
3.

The heaters should be mounted in an indoor non-
hazardous location conforming to UL/Nema Type
1.
4.

The installation site must allow sufficient free
space around the heater for installation and
maintenance access.
5.

The heater throw distance should be considered in
positioning the heater in the space to be heated.
6.

The location must be capable of safely supporting
the heaters' weight. Refer to the installation
drawings for the weight.
B. Mechanical Installation
1.

Install the heater as shown on the installation
drawing using either the wall or ceiling mounting
brackets.
2.

The installation must comply with all minimum-
mounting dimensions as shown on the installation
drawing.
3.

When using the wall-mounting bracket the unit
may be rotated from side to side in a full 180° arc
to the desired throw direction, but do not direct
the airflow towards the wall.
4.

The louvered outlet grill may be manually adjusted
to a straighter throw with a downward pitch of less
than 45°. Do not close the louvers more than 45°.
5.

To complete the installation make sure all
connections are tight and secure.
C. Electrical Installation
1.

Wiring to the heater should be permanently
installed in metallic or non-metallic electrical
grade tubing, and should include a grounding
conductor if non-metallic tubing is used.
2.

Wiring to the heater should have adequate strain
relief.
3.

The conduit and wiring connections should not
support any of the heaters' weight.
4.

Follow the wiring diagram located inside the heater
terminal box.
5.

Field supply wiring must be rated for 600Vac and
a minimum of 75°C.
6.

Field wiring to the heater must comply with all
branch circuit requirements of any local codes, the
National Electrical code, NEC or the Canadian
electrical code, CEC, as applicable.
7.

A properly sized branch circuit disconnect switch
and branch circuit protective device, fuses or
circuit breaker, should be provided to protect the
supply wires.
8.

Field supply conductors must be sized for at least
125% of the circuit current. The circuit current in
amps is calculated as follows:
Single Phase Amperage = Circuit kW x 1000
Circuit Voltage
Three Phase Amperage = Circuit kW x 1000
1.732 x Circuit Voltage
9.

Refer to the heater data label for circuit ratings.
10.

To complete the installation make sure all
connections are tight and secure.
III. OPERATION AND MAINTENANCE
1.

The heater has a fan On/Off thermostat that
automatically turns the fan on after the heater has
warmed up and keeps the fan running after the
heater has been turned off until the heating
elements have cooled down.
2.

The heater has a safety high temperature shut off
switch that will shut the heater off if high outlet
temperatures develop. It will automatically reset
when the heater cools down below the safety limit
temperature setting.
3.

Refer to the heaters' wiring diagram for other
possible optional control components.
4. At least once each year, check all electrical and
mounting connections for tightness and re-
tighten as required.
5. Keep the inlet free of dirt and debris that could
collect on the heating element fins.
Periodically remove the inlet and outlet grills
and use compressed air to blow out any dirt
and debris that may have collected.
Keep These Instructions With The Heater

WARNING
Hazardous voltages are present. Be sure to
lock out and tag the branch circuit disconnect
switch before working on this heater. INDEECO
425 Hanley Industrial Court
St. Louis, MO 63144
Phone: (314) 644-4300 Fax: (314) 644-5332
www.indeeco.com
23-2225-83
Air Throw
(Ft.)
25-38.4
12.5-20
KW
Ratings
7
4
1-12
M
8 1/4
20 3/4
X
DIMENSIONS (INCHES)
15
16 1/4
5 1/2
5 1/2
W
8 3/4
23 1/2
23 1/2
Y
17
80
Weight
(Lbs)
45
60
19 1/4
19 1/4
Z
13
50
50
15
Minimum
2 Ft.
Maintenance
Access
6 In.
Y
X
Z
W
6 Ft.
Minimum
(any mounting)
CEILING
Two 3/8-16
threaded rods
(not supplied
with the
heater)
Ceiling
mounting bracket
3 In.
2.5 In.
2.5 In.
Mounting hole detail
rear view of wall
mounting bracket
7/16" Dia.
6 holes
Wall mounting
bracket
Minmum
W
Airflow
M