Quick Reference Guide
High-Efficiency Horizontal Discharge Variable Speed Heat Pump
Low-voltage wiring
Note: Use the O terminal on the thermostat for the reversing valve connection (energized in cool-
ing mode). The room thermostat must control fossil fuel operation if matched with a gas furnace.
Clearance
During installation, maintain the required clearance from walls and adjacent equipment. See Figure
3. When installing multiple units, be careful to avoid intake of discharged air from adjacent units.
Connection and access points
CAUTION
Risk of fire
This unit uses a mildly flammable (A2L) refrigerant. Refer to A2L refrigerant safety consider-
ations in the Installation Manual to ensure safe installation, operation, and servicing of this unit.
Figure 1: Control wiring diagram - standard ECM air handler and HH8 heat pump
NOTICE
The mitigation control board has a bank of DIP switches. For use with a JHE air handler indoor
model, both DIP switches must be in the 0 or off position.
Figure 2: Control wiring diagram - standard ECM gas furnace and HH8 heat pump
NOTICE
The mitigation control board has a bank of DIP switches. Both DIP switches must be in the 1 or
on position. The room thermostat must control fossil fuel operation. W2 is applicable on only
multi-stage gas furnace models. Use the mitigation control A2L output instead of the G output for
Y81E, Z8ES, RL18,Y82E, Z8ET, Y91E, Z9ES, RG19, Y92E, and Z9ET gas furnace models.
!
Y1
RR
Y/Y2
YEL (Y2 OUT)
YEL/BLK (Y1 IN)
WHT
ORG
BLU
YEL (Y2 IN)
YEL/BLK (Y1 OUT)
RED
JHE air handler
mitigation control
Thermostat
JHE air handler
outdoor unit
harness leads
HH8 heat pump
Mitigation control
Thermostat
Furnace control
HH8 heat pump
CAUTION
This equipment uses an inverter drive that stores hazardous energy up to 5 min after power is
removed. Wait for more than 5 min before performing electrical work after power is removed.
Figure 3: Minimum clearance
NOTICE
Fasten this equipment to a sturdy base for protection against vibration, a strong breeze, or an
earthquake. Use anchors and a base adequate to protect the unit against tipping or dislocation.
Figure 4: Connection and access points
!
A2030-001
24k/36k: Over 12 in. (300 mm)
Over 8 in.
(200 mm)
Over 20 in.
(500 mm)
Over 14 in.
(350 mm)
Over 6 in.
(150 mm)
60k: Over 24 in. (600 mm)
Fan guard
(removable)
Mounting points
(4 points)
Service valve
High-voltage
connection
Low-voltage
connection
Vapor
connection
Liquid
connection