8
A5HL5-SF-1A-EN
Table 6. Low Voltage Hook-up
Timer
DHM** DHM**
1
M
~
Input
C NO
NC
1. Units with pigtails require wirenuts for connections.
2. Cap all unused wires.
3. When BK is used with PWM-enabled Comfort Control, do not connect Y2 at the air handler.
4. When BK is used, cut the jumper between R and BK on the control board. See wiring schematic for details.
Y0
YL/BLK
5. In AC systems for multiple stages of electric heat, jumper W1 and W2 together if comfort control has only one stage of heat.
2 Stage, 2 Step, HP
Thermostat Air Handler
Outdoor
R
G
B
W1
W2
R
C
O
T*
Y1
D
R
G
B
O
Y1
W1
Blue
24 VAC HOT
FAN
24 VAC
Common
SOV
COOL/HEAT
1st STAGE
COOL/HEAT
2ns STAGE
White
White
W2
O
Y1
Y2
BK
Y2Y2
WH/BLK
AUX/EMERGENCY
HEAT 1st STAGE
AUX/EMERGENCY
HEAT 2nd STAGE
(3)
Optional
See Note
2 3 4 5
Timer Functionality: To achieve noise reduction during set hours.
Wiring is general to any after market timer,
mounting can be done at the indoor or outdoor unit,
refer to specific timer wiring instructions for details.
6. Reversing valve is energized in heating.
Purple
Table 7. Mitigation Board Guidelines
• The approved ID/OD combination will provide sufficient safe ventilation in case of a leak.
• Refer to Indoor Unit Installer’s Guide for correct specifications on indoor unit install.
• All systems require mitigation boards so an altitude adjustment factor may be required.
• Mitigation Control Board needs to be included in an A2L System.
EElleeccttrriiccaall -- LLooww VVoollttaaggee
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