Package Unit Heat Coil Installation Instructions
# 507416-01 Page 3Page 2 # 507416-01
Risk of electrical shock. Before installing or servic-
ing unit, be sure ALL power to the unit is OFF. More
than one disconnect switch may be present. Failure
to disconnect power supplies can result in property
damage, personal injury, or death.
WARNING
3. Remove the heater blockoff by removing the four
screws holding it in place.
4. Insert the heat accessory into the control panel and
fasten in the same mounting holes. Use two addition-
al screws to secure left edge of heater accessory.
5. Plug the heat accessory wiring harness into the wire
harness on the control assembly. Field wiring of the
auxiliary heater is separate from the unit power sup-
ply. Wire the power supply wiring for the heater to the
appropriate connections on the heat accessory.
6. Replace the heater compartment access panel and
reconnect the power.
Electric Heat Accessory Installation
Figure 1 -PHP, PCE, CHPX AND CHAX
Heater Kit
Heater
Blockoff
Heater
Compartment
Access
Panel
Inspection of Shipment
Upon receipt of equipment, carefully inspect it for possible
shipping damage. If damage is found, it should be noted
on the carrier’s freight bill. Take special care to examine
the unit inside the carton if the carton is damaged. File a
claim with the transportation company.
If any damages are discovered and reported to the carrier
DO NOT INSTALL THE UNIT, as claim may be denied.
Electrical Wiring
All eld wiring must be done in accordance with National
Electric Code recommendations, local codes and applicable
requirements of UL or in accordance with Canadian Electrical
Code, local codes and CSA Standards. Separate power
supply circuits are used for electric heat, unless a
single point power kit is installed. 15 and 20 kW
heaters require two separate power supply circuits for electric
heat. Power wiring, disconnect means, and over-current
protection are to be supplied by the installer. If circuit
breakers are used, breakers should be HACR type per NEC.
See unit rating plate for maximum over-current protection,
minimum circuit ampacity, as well as operating voltage.
The power supply must be sized and protected according
to specications supplied.The unit must be grounded with
a separate ground conductor. See electrical connection
diagram for typical eld wiring connections.
Electric Heat Accessory Installation
Before installing the unit, check information on the unit
rating plate to ensure that the unit meets the job speci-
cation, proper electrical power is available, and the proper
duct clearances are maintained.
MODELS: PHP, PCE, CHPX AND CHAX
To install the electric heat accessory (see Figure 1):
1. Disconnect the power and remove the heater compart-
ment access panel.
2. Disconnect the plug separating the high voltage wire
harness. Remove the high voltage wire harness plug
and discard.
Electrical Connections Use copper conductors only.
See Figure 3 for electrical connections.
MODELS: PR and LRP
To install the electric heat accessory (see Figure 2):
1. Disconnect the power and remove control access
panel.
2. Disconnect the plug separating the high voltage wire
harness. Remove the high voltage wire harness plug
and discard.
3. Remove the heater blockoff by removing the four
screws holding it in place.
4. Insert the heat accessory into the control panel and
fasten in the same mounting holes. Use two additional
screws to secure bottom of heater accessory.
5. Plug the heat accessory wiring harness into the 6-
pin wire harness from the control assembly. Field wir-
ing of the auxiliary heater is separate from the unit
power supply. Wire the power supply wiring for the
heater to the appropriate connections on the heat
accessory.
6. Replace control access panel and reconnect the
power.
Figure 2 -PR & LRP
7. Mark the heater installed label located on the pack-
age unit to indicate the heater accessory that has
been installed. Upon completion of installation, afx
supplied heater wiring diagram from kit next to the
basic unit wiring diagram.
Electrical Connections Use copper conductors only.
See Figure 4,5, 6 & 8 for electrical connections