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Auxiliary electric heat power
supply knockout opposite air coil
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Electric Heat Assembly
Disconnect (optional
refer to local code)
Route conduit thru cabinet and
connect to electric heat control
box. Seal to eliminate air leaks on
cabinet exterior.
6.
Re-install blower assembly, Figure 3, into electric heat
assembly using blower mounting screws. Check blower
wiring for proper wiring connections.
7.
Route the low voltage harness through the provided ‘pie’
bushing and plug into electric heat control board connector
P2 as shown in Figure 4.
8.
Install power conduit, Figure 5, through unit corner post
knockout and attach conduit directly to the electric heat
control box.
Horizontal Installation
1.
Disconnect power to the unit
2.
Remove blower access panels.
3.
Clip wire-tie holding electric heat low voltage 3-wire
harness to discharge panel stiffener.
4.
Remove blower discharge flange screws and remove the
two flanges and discard them but save the screws.
5.
Install electric heat in discharge flange mounting where
discharge flange had been removed using the old screws.
6.
Route the low voltage harness through unit discharge panel
knockout and seal penetration 'air tight'.
7.
Then route the harness through the provided ‘pie’ bushing
in the electric heat control box and plug into electric heat
control board connector P2 as shown.
8.
Install power conduit and attach directly to the electric heat
control box.
Wiring and Setup (all models)
ON
OFF
ON
OFF
1
2
3
4
P1
In 12, 15 and 20 kW units
two power circuits are
employed to reduce wires
size and cost of breakers
L1
L2
L3
L4
P2
Conduit
L2
L1
Conduit
In 12, 15 and 20 kW units, optional
single power circuitb is employed to
reduce the number of wires needed.
Conduit
OFF
OFF
L1
L2
L3
L4
L1
L2
1
2
3
4
P1
ON
OFF
ON
OFF
Locate electric heat
harness in air handler
and route through
provided bushing
Connect 5 pin low
voltage connector
to board
P2
Remove discharge flange and
replace with horizontal auxiliary
electric heat
Optional disconnect
refer to local codes
Figure 4. Low Voltage Harness Connection
Figure 5. Power Conduit And Wire Routing
Figure 7a. Power Wiring, Dual Circuits, 12, 15, 20kw
Figure 6. Typical Horizontal Installation
Figure 7b. Power
Wiring, Single Circuit,
12, 15, 20kw
Figure 7c. Power Wiring,
4, 5, 8, And 10kw
