INTRODUCTION
Congratulations! You have just purchased one of the most ver-
satile electric space heaters available. Your new electric unit
heater has unmatched operating flexibility. It is designed to meet
a variety of heating requirements by simply switching a few easi-
ly accessible wires located in the base of the unit (See output
ranges in Specifications on page 1). This unique feature lets you
use a single unit to meet a wide range of heating applications.
The UH heaterʼs unique mounting system simplifies both installa-
tion and air flow control. The mounting bracket attaches to the
ceiling with a single screw and allows you to turn the entire heater
in a full circle. The mounting bolts on the sides of the heater per-
mit you to adjust the air flow direction to any angle between hori-
zontal and vertical. The louvers adjust up and down for even
greater control.
These features combine to make the UH heater the most versa-
tile space heater available anywhere for applications ranging from
garages, basements, and workshops, to public buildings, service
stations, stores, mini-warehouses, stockrooms, or similar applica-
tions. It can be installed easily by anyone in only a few minutes.
This manual shows you how to install, operate, and maintain your
UH Series electric heater.
Unpacking Your New Heater
Remove the heater from the box and inspect it for any damage. If
it appears to be damaged, immediately return it to the store from
which you purchased it.
Check the contents of the box to make sure it contains one heat-
ing unit and one mounting bracket.
Tools Needed
You will need the following tools to install your UH Series
electric heater:
• Screwdriver
• Needle nose pliers
• Pliers
• Electric Drill and 1/4" bit
•Adjustable wrench
Hardware Needed
You will also need the following hardware for installation:
• Enough properly sized insulated copper conductor
(with ground) wire to run power from the
breaker/fuse to the heater. Only use copper
wire rated at least 75° C. Do
not
use aluminum
wire with this unit. Refer to local and national electrical
codes for proper supply wire selection.
• Proper size fuses and circuit breakers in accor-
dance with the National Electrical Code. Also see
Table 1, page 4.
Note: For certain applications, conduit may be
required (see Fig. 1). Check local electrical
codes. Also, if you run the wiring in conduit and
wish to be able to turn the heater, be sure to pur-
chase enough flexible conduit to allow the heater
to be turned.
INSTALLATION
Location Of Heater
The heater should be installed out of traffic areas and at least 6'
off the floor. The direction of air flow should not be restricted (ie:
by columns or machinery) and the air flow should wipe exposed
walls, rather than blowing directly at them. When more than one
heater is used in an area, the heaters should be arranged so that
the air discharge of each heater supports the air flow of the oth-
ers to provide best circulation of warm air, as indicated in
Figure 2.
Mounting Height
When the air flow of the heater is directed vertically, the minimum
mounting height is 6 feet (1829mm), the maximum mounting
height is 11 feet (3353mm). When the air flow of the heater is
directed horizontally the minimum mounting height is 6 feet
(1829mm) and the maximum recommended height is
11 feet (3353mm).
Distance from Walls
When the heater is mounted so that the air flow direction is at an
angle from horizontal to 45° downward and vertical, the distance
from the mounting bracket to any wall should be at least 13 inch-
es (330mm). When the heater is mounted so that the direction of
air flow is at an angle between 45° downward and vertical, the
distance from the mounting bracket to any wall should be at least
48 inches (1219mm).
2
Connectors, cable, and hardware used to wire the UH Heater
(Illustration may not apply to UH724ST due to supply wire sizes)
Fig. 1
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Fig. 2
WARNING
THIS UNIT OPERATES ON 240 OR 208 VOLTS AC. IMPROPER
INSTALLATION OR FAILURE TO FOLLOW THE PROCEDURES
AS OUTLINED IN THIS MANUAL CAN RESULT IN SERIOUS
ELECTRICAL SHOCK. DISCONNECT ALL POWER FROM THE
HEATER AT THE MAIN SERVICE BOX BEFORE ATTEMPTING
TO INSTALL OR SERVICE THIS UNIT.
!
WARNING
ALL ELECTRICAL WIRING MUST CONFORM TO LOCAL ELEC-
TRICAL CODES. HEATER CIRCUIT MUST BE PROTECTED
WITH PROPER FUSES. SEE TABLE 1 ON PAGE 4.
!
