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8
HK Series
Remove the wires from heater contactor and
terminal block at "L1" only. If wires are removed
during installation, ensure that they are marked for
proper reconnection. When reconnecting the line
voltage wires to the contactor, apply 22 in-lbs of
torque.
sTeP 5: Install the element cover over the heater
element(s). These are secured with a tab at one
end of the cover and two of supplied sheet metal
screws at the other end (See Figure 2). Ensure that
heater wires are routed through the plastic bushing
on the heater element cover.
figure #2 – With Collar removed insert heater element(s) (one
shown in this diagram), wires not shown in diagram.
sTeP 6: INSTALLING THE NEW ELECTRICAL BOX
a. Using the pre-punched holes in the two front
corner posts, fasten the new electrical box
provided in the electrical heater kit using the
four screws that were included with the heater
kit. Ensure no wires are pinched between any
metal parts.
b. If the wires from the heater elements were
disconnected from the contactor(s) and
terminal block at "L1" in Step 4, reconnect the
elements to the contactor(s) applying 22 in-lbs
of torque.
sTeP 7: CONNECTING HIGH VOLTAGE WIRES
6 720 220 328
Caution
Units with 5, 7.5, or 10 kW electrical
Heater elements (HK050, HK075, HK100)
a. Reconnect the two line voltage wires that were
disconnected in Step 1(f) to the main power
terminal block in the heater/heat pump
electrical box.
b. Reconnect the ground wire that was
disconnected in Step 1(f) to the ground lug in
the heater/heat pump electrical box.
c. Reconnect the blower motor line voltage wires
to the terminal block that was disconnected in
Step 1(g). The black wire should connect to the
"L1" side, and the white wire should connect to
the "L2" side.
d. Reconnect the blower motor ground wire that
was disconnected in Step 1(g) to the ground lug
and tighten the screw.
e. Reference the appropriate wiring diagram at
the end of this manual to ensure that all
connections have been made and are correct.
Units with 15 or 20 kW electrical Heater
elements (HK150, HK200)
a. Reconnect the two line voltage wires that were
disconnected in Step 1(f) to the power fuse
block in the heater/heat pump electrical box.
Use the following torques when tightening the
line voltage wires:
Subject to change without prior notice
By adding electrical heaters, the electrical
demand may change quite significantly. The
existing wires between the circuit panel and
the air handler may not be sufficient and may
need to be replaced. Verify the breaker is
appropriately sized for the new electrical load
also. See the data tag label that was included
with the heater kit or at the end of the manual
for the appropriate wire and breaker size for
the amount of electric heat that is being
installed. If the electrical load surpasses the
rating of the breaker and/or wire size, add a
separate circuit at the breaker panel, and run
new wire.
Installation
Revised 05-13
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