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Installation
sTeP 1: DISCONNECT POWER:
Always disconnect electrical power to the air
handler and condensing section completely
from its electrical source prior to any servicing.
It is highly critical that all wires that are
disconnected within these steps are carefully
labeled so that reconnection is easy and accurate.
a. Turn the system to "OFF" from the unit's
thermostat
b.
Turn the power to the condensing section and
air handler section off at the unit's disconnect
switch or breaker panel.
c. Remove the access panel from the front of the
air handler exposing the blower section. Place
the panel mounting screws aside in a safe place
as they will need to be reused when putting the
panels back on.
d. Unplug the blower motor communication
harness at the motor control board and set
aside for reconnection later.
e. The thermostat wires terminate at a common
connection block on the motor control board
inside the electrical box of the air handler.
Unplug the thermostat terminal block and set
aside for reconnection later.
f.
Disconnect the line voltage wires from the
blower motor power terminal block from the
service side and the ground wire from the
ground lug in the air handler electrical box.
g. The low voltage wires from the condensing
section connect to a terminal block in the air
handler with ¼" insulated terminal
connections. Mark and disconnect these low
voltage wires from terminal connections; set
aside for reconnection later. The "C", "R", "O",
"Y1", & "Y2" should be labeled and
disconnected in this step.
h. All wires leading into the air handler's electrical
box should now be disconnected at this point.
If any wires remain connected, go back through
the previous steps to ensure that all wires have
Revised 05-13
Caution
Caution
Subject to change without prior notice
been properly labeled and disconnected before
proceeding.
i.
Remove existing Electrical Box and set aside.
sTeP 2: Remove the heater collar cover plate(s) to
install the heater elements. (See Figure 1).
figure #1 – showing Collar mounted on blower housing,
element location and collar plate(s)
sTeP 3: Identify retainer pins on the end of the
heater element(s). These pins are to be inserted in
holes visible in the back of the heater collar. This
stabilizes the heater element and prevents
vibration of the heater elements.
sTeP 4: Slide the heater element(s) into the
mounting opening(s) on the heater collar, making
sure that the retainer pins engage the holes in the
back of the collar.
It may be necessary to lower the blower in order
to complete this task.
When installing the heater elements into the heater
collar, ensure that the thermal overloads are on the
right side; this will be the "L1" side. Secure each
insert(s) with four of the supplied sheet metal
screws provided (See Figure 2).
It may be necessary to remove the line voltage
wires that are connected to the element(s) from
heater electrical box in order to complete
installation.
6 720 220 328
HK series
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