Wiring Guide

C-1
Installation
All wiring for this control must comply with the National Electric
Code and all local codes and ordinances.
Do not locate control on an outside wall or where it will be
affected by drafts or radiant heat. It does not require level
mounting.
1. Remove front cover and one wiring access knockout from
control.
2. Attach control to mounting surface with three screws
through back of case. Use a wooden shim for insulation if
surface is metal or masonry.
3. Thread two wires through knockout and connect to R and W
control terminals. Leads must be long enough to extend to
unit heater junction box.
4. Disconnect power to unit heater and open junction box on
unit heater. Select correct wiring diagram for unit heater
model (and size if applicable) and complete wiring of control
to unit.
Operational Check
1. Set room thermostat to its lowest setting and restore power
supply to unit heater.
2. Familiarize yourself with the adjustment knob of the energy-
saver control. In step 5 you will want to set it at 3-6 degrees
(approximately) above the thermostat, but for now, turning
the dial clockwise to a lower setting simulates a rise in
temperature and only the unit heater fan should come on. If
the wiring is correct, the controlled equipment will switch on
and off as the temperature dial indicates the approximate
space temperature.
3. If the controlled equipment does not start and stop as the
thermostat dial is turned, disconnect the power supply and
check the wiring and terminal connections.
4. If the controlled equipment operates opposite to the
sequence desired, shut off the power and check for
reversed leads on the switch.
5. After checkout, reset room thermostat to desired comfort
level. Set energy-saver control 3 to 6 degrees above
room thermostat (depending on mounting height, room
conditions, etc.) for ceiling air circulation.
6-446 — WIRING INSTRUCTIONS FOR ENERGY SAVER CONTROL
W
R
B
WIRING INSTRUCTIONS:
1. Turn off power to unit heater.
2. Connect “R” of Energy Saver to
terminal 1 of time delay relay.
3. Connect “W” of Energy Saver to
terminal 3 of time delay relay.
4. Follow operational check
sequences on prior page.
WIRING INSTRUCTIONS:
1. Turn off power to unit heater.
2. Connect “R” of Energy Saver to
terminal 2 of time delay relay.
3. Connect “W” of Energy Saver to
terminal 4 of time delay relay.
4. Follow operational check
sequences on prior page.
1
(on units with 1Ø power supply this
is fan motor or on units with 3Ø
power supply this is the starter coil)
TD Relay
TDC
To XFMR
From power supply
From power supply
Gravity Vented, Propeller and Blower Models – (Single and Three Phase)
WRB
2
4
(on units with 1Ø power supply this
is fan motor or on units with 3Ø
power supply this is the starter coil)
TD Relay
TDC
To XFMR
Power Exhausted, Propeller and Blower Models – (Single and Three Phase)
3
Before proceeding with wiring the accessories described,
make sure the unit has been installed, vented piped and wired
according to the Installation/Service Manual and Standard Wiring
Diagram furnished with the unit heater.
CAUTION
Turn off all power and gas to unit before wiring. Failure to
wire this unit according to this wiring diagram may result in
injury to the installer or user. For deviations, contact factory.