Installation Manual

4
ATTACH CIRCUIT BREAKER
MOUNTING BRACKET
WITH PROVIDED
SHEET METAL SCREW
TIP IN SLIGHTLY
AND SECURE
NOTCHES
BEHIND FLANGE
FLANGE
CIRCUIT
BREAKER
KNOCKOUTS
SCREW
ATTACH CIRCUIT BREAKER
MOUNTING BRACKET
WITH PROVIDED
SHEET METAL SCREW
FIGURE 3
9 Insert the power leads into the lugs provided on the
circuit breaker or terminal block and tighten. Ensure
the power leads are routed through the outer cabinet
with a watertight electrical connector, sized
appropriately for the electrical power supply (see
NEC, National Electric Code).
10 Remove the protection plug (male plug) and discard.
Insert the one provided in the electric heat kit. It
can be inserted in one position only.
11. Insert the ground wire into the lug(s) provided for
that purpose.
12. Break out the appropriate area of the electric heat
kit cover previously removed for the circuit breaker
provided in the heater kit and replace electric heat
kit cover.
NOTE: To replace the electric heat kit cover, slightly
tip the cover and insert
only the notches under the
flanges on the top and bottom of the box. Secure
with screws. See Figure 3.
13. Ensure breaker is in the ON position. Replace blower
panel cover and check operation through the room
thermostat.
14. RESTORE POWER.
15. Apply the provided wiring diagram for package unit
models adjacent to the wiring diagram supplied on
the inside of the unit control box cover.
16. When proper operation is ensured, replace the
control box cover and resume normal operation.
NOTE: HKP-15C replaces HKR-15C and HKP-20C replaces
HKR-20C in package units.
17. If installing an HKP heater kit on a unit that only has
the corresponding HKR heater kit shown on the serial
plate, use a permanent marker to add the HKP model
to the serial plate (the data is the same as the HKR).
If the corresponding HKR model number is not on
the serial plate, the heater kit can not be used.
GPH/GPC “M” S ERIES I NSTALLATIONS
NOTE: A separate power supply is required for the HKR heater
kits.
HIGHVOL TAGE!
D ISCONNECT ALL POWER  BEFORE  SERVICING .
M
ULTIPLE  POWER  SOURCES  MAY  BE  PRESENT .F AILURE 
TO  DOS  SO  MAY  CAUSE  PROPERTY  DAMAGE , PERSONAL 
INJURY  OR  DEATH .
WARNING
1. Disconnect all power to the unit, both indoor and
outdoor.
2. Remove control box door.
3. Remove blower door.
4. Locate heater box. Remove the two screws holding
the heater box cover in place.
FIGURE 4