HKR Installation Manual

7
19. Ensure breaker is in the ON position. Replace blower
panel cover and check operation through the room
thermostat.
20. RESTORE POWER.
21. Apply the provided wiring diagram for package unit
models adjacent to the wiring diagram supplied on
the inside of the unit control box cover.
22. When proper operation is ensured, replace the
control box cover and resume normal operation.
NOTE: In Package Units:
HKP-05C replaces HKR-05C
HKP-10C replaces HKR-10C
HKP-15C replaces HKR-15C
HKP-20C replaces HKR-20C
23. 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.
“M” S ERIES P ACKAGE U NIT I NSTALLATION
NOTE: A separate power supply is required for the HKR
heater kits.
HIGH VOLTAGE !
D ISCONNECT ALL POWER BEFORE SERVICING .
M
ULTIPLE POWER SOURCES MAY BE PRESENT . F AILURE
TO DO 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 12).
Figure 12
5. Remove the two screws holding the rear mounting
plate. Note the orientation of the heater box
covers for reassembly.
NOTE: For “M” Series Package Unit Installations, do not
remove the horseshoe contractor bracket (on
15kW or 20kW heater kits).
6. Three-Phase HKR Kits only
Remove the contactor from the HKR mounting
bracket, leaving the wires connected. Attach
contactor to rear mounting plate as shown in Figure
13.
Figure 13
7. Install heater element(s) with the four (4) pointed
screws included in the unit literature bag. Note the
air flow direction label located on the heater element
base shown in Figures 14 and 15. Orient the heating
element base to match airflow direction on package
unit blower assembly. Ensure scews attaching
horseshoe contactor plate fit into relief cuts of
package unit.