is shown on schematic wiring diagrams. NOTE: Use mini-
mum 75° C copper wire only.
3. Refer to base unit instructions for recommended wiring
procedures.
4. Connect low voltage wires as shown in heater schematic
diagrams (See Figs. 5-22). These connections must be made in
the 24-v. barrier section inside the unit panel (See Fig. 2).
5. Connect field power wiring as shown in heater wiring
diagram. All connections should be made inside the unit
and comply with the National Electric Code and State and
Local Codes. Heaters with factory installed fuses may be
installed on a branch circuit protected by either a fuse or
circuit breaker. For all other heaters, the branch circuit
must be protected by a fuse or a circuit breaker supplied
by others.
6. Make all high voltage wire splice connections inside the unit
control box (See Figs. 5-22). Use splice connectors provided.
Properly insulate connectors. Separate all wires from incom-
ing power leads.
7. Be sure that all electrical terminal connections, clamps,
screws, etc. are tight before proceeding.
8. Check wiring diagram supplied with heater for specific
connections and information.
9. Check operation as described in Start-Up section.
Before performing installation, service or maintenance opera-
tions on this system turn off all main power switches and/or
disconnects. There may be more than one switch or discon-
nect. Turn off accessory heater power switch if applicable.
Electrical shock can cause serious injury or death. TAG
DISCONNECT
SWITCH(S)
WITH
A
SUITABLE
WARNING LABEL.
START-UP
Before proceeding, verify that all wiring is correct per factory
approved schematic. Notify factory immediately of any
discrepancies.
1. Refer to base unit installation instructions as required.
2. Check for loose terminal connections.
3. Check that all fuse and circuit breaker short circuit interrupt-
ing ratings are adequate.
4. Turn on unit and heater power.
5. Set thermostat to call for heat.
6. Check operation of heater.
Fig. 1—Unit Control Box (side view)
C01055
UNIT VIEW
ATTACHED LID WITH 4 SCREWS
UNIT PANEL
ADHERE BLACK GASKET (8”x 2 1/4)
(ON FUSED MODELS) TO UNIT SIDE PANEL
BETWEEN FUSE BLOCK AND PANEL
POWER AND CONTROL WIRING
THROUGH KNOCKOUT
BLOWER HOUSING
HEATER AREA
Fig. 2—Unit Control Box (top view) and Schematic Location
C01056
BLOWER HOUSING
HEATER SECTION
HEATER CONTACTORS
HR1, HR2
UNIT PANEL
COMPRESSOR CONTACTOR
POWER WIRING
YELLOW / BLACK
CONTROL WIRING
BROWN/ WHITE/ VIOLET
FUSE BLOCK WHEN REQUIRED
ADHERE SCHEMATIC WHEN NON-FUSED
GROUND LUG LOCATION
(SEE #11)
BARRIER CONTROL PANEL 24V
POWER & CONTROL
WIRING HARNESS
USE WIRE TIES
5 PLACES (SEE#8)
CAPACITORS
TOP VIEW
2
