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User's Manual
Vertical or Horizontal Downflow Unit Heater
7.
Each heater has a wiring diagram
the access door. Consult this diagram before making any
field connections.
8. Electrical Accessories, either kits or factory-installed
options, are shown connected by a dashed line on the
heater wiring diagram.
9. Single or three-phase connections may be used with
heater models 246132 and 246133. These units are
factory wired for single phase operation. If these heaters
are for use with three-phase power, reconnect the wires
as indicated in the wiring diagram attached to the heater.
10. Connect the red live wire to L1, black live wire to L2 and
white live wire to L3 of the connector. Connect ground wire
to
.
L1: red live wire
L2: black live wire
Ground Wire
11.For model 246132 and 246133, the heaters are wired for
240V from factory. When heater is to be connected to
208V supply, the transformer leads have to be inter
changed. Inter change transformer red and black primary
leads (see wiring diagram on heater door). The color lead
is the COMMON for the 40VA control transformer
provided with these heaters.
CONTROL WIRING OF OPTIONAL
EQUIPMENT
Line voltage is present on some of the
terminals on the control terminal board.
Always disconnect the power from the heater
before making any connections to the control
board to prevent hazards.
1. Use min. 600 volt, NEC Class 1 insulated wire for all control
circuit wiring.
2. Use a crimp-on type fork terminal on the wire ends that
attach to the control terminal board if more than one
connection is to be made under the terminal screw.
3. Control wiring must be rated minimum 18 AWG.
NOTE: Thermostat and control circuit wiring must be
suitable to handle the full load of the heater
affixed to the inside of
L3: white live wire
OPERATION INSTRUCTIONS
1.Heater must be properly installed before operation.
2. Turn power supply "ON" at main service panel.
3. Where applicable, refer to control accessory instructions
regarding proper operation of any controls or accessories
used with the heater.
4. Ambient temperature is regulated by adjusting the built-in
thermostat to a desired position.
5. Allow the unit to operate and warm up the room.
6. When the desired temperature is reached, turn the control
knob counterclockwise until the heater turns off. This is the
ideal setting.
7. The heater will start automatically when the room
temperature drops below this set point, and will turn off when
the set point is reached.
It is important to keep this heater clean. To assure efficient oper-
ation follow the simple instructions below.
USER CLEANING INSTRUCTIONS
1.After the heater has cooled, a vacuum cleaner with brush
attachment may be used to remove dust and lint from exterior
surfaces of the heater including the grille openings.
2.With a damp cloth, wipe dust and lint from grille and exterior
surfaces.
3.Return power to heater and check to make sure it is operating
properly.
MAINTENANCE CLEANING INSTRUCTIONS
(To be performed only by Qualified Service Personnel)
At least annually, the heater should be cleaned and serviced by
a qualified service person to assure safe and efficient operation.
This should include the removal of the grille and, as necessary
the heater from the back box to clean residue from the unit. After
completing the cleaning and servicing, the heater should be fully
reassembled and checked for proper operation.
To reduce the risk of fire and electric shock or injury, disconnect
all power coming to heater at main service panel and check that
the element is cool before servicing or performing maintenance.
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