Product Manual

PROPER LOCATION INSTRUCTIONS
Once the total heating load is calculated, the quantity and
capacity of the unit heaters must be determined. because
a large number of low-capacity heaters provides more
uniform heat distribution. This approach is recommended
when the area will be occupied by a relatively large
number of sedentary personnel, (i.e. working on produc-
tion lines and at benches.)
A large number of smaller capacity unit heaters tends to
prevent hot drafts, reduces noise levels, and increases
diversity of load to help reduce electrical demand and
operating costs.
In warehouses where even heat distribution and constant
temperatures are less important, a smaller number of high
capacity units can be used -- in many cases reducing
installation cost. To maintain reasonable heat distribution
and reduce severe stratification even in lower bay areas, the
total air volume of the space should pass through the unit
heaters about three times per hour. (Take total cubic feet
and divide by 20 in order to determine proper total heater
CFM rating.)
It is important that the rated voltage of the heating equip-
ment match the supply voltage. Supply voltage in excess
of the heater rated voltage can damage equipment.
Supply voltage lower than the rated heater voltage will
decrease heater output as well as run the risk of damag-
ing some components.
Horizontal unit heaters are recommended in low bay
areas with maximum 15 to 18 foot ceilings. These should
be concentrated along outside wall or other areas of
greatest heat loss; spaced to set up a generally circular air
movement, each heater supporting the air stream of the
other. Additional vertical down below unit heaters with
appropriate accessory diffusers can be located to counter-
act ceiling heat losses (see Figure 1 Location charts).
Figure 1 Location Instructions
GENERAL SAFETY INFORMATION / CAUTION:
Follow all local electrical and safety codes, as well as the
National Electrical Code (NEC) and the Occupational
Safety and Health Act (OSHA).
To avoid possible electrical shock, be sure the electrical
current is turned off at the main switch prior to wiring or
servicing of unit.
If the power disconnect is not integral and is out-of-sight,
lock it in the open position and tag to prevent unexpected
application of power prior to performing any service or
maintenance of the unit.
The unit when installed must be electrically grounded in
accordance with the National Electrical Code and stan-
dard industry practice.
Make certain that the power source conforms to the
requirements of your equipment. See Table 2 on page 6
for wire and circuit size
Check heater voltage and phase on rating label to confirm
that it matches the electric service supply.
Wiring diagrams of the heater and supply connections are
permanently attached to the inside of the heater access
door. All terminals are coded in accordance with the
wiring diagram. Accessory wiring are shown on the unit
wiring diagram and supporting literature.
The heater must be mounted at least 7’ above the floor to
prevent accidental contact with the fan blade which could
cause injury. Install unit so there are no obstructions to the
intake or discharge. Maintain clearances as shown on
Table 1, 2, Fig. 1 & 2.
The wall/ceiling mounting structure and anchoring
provisions must be on sufficient strength to support the
combined weight of the heater and mounting bracket.
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