B
G
R
Y
Ventilator Connection
B
G
R
Y
C
W
O
Y1
Y2
R
FUSE
Green Yellow
A
B
C
D
A A
B B
C C
D D
User
Interface
Indoor
Unit
Fig. 2 — Ventilator (HRV / ERV) Connection
B | B |
G | G |
R | R |
Y | Y |
A03143
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C |
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W2 |
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O |
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Y |
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1 Spd. Heat Pump |
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FUSE
Green Yellow
A
B
C
D
A A
B B
C C
D D
User
Interface
Furnace
Fig. 3 — Variable-Speed Furnace with 1-Spd. Heat Pump (Dual Fuel)
A03144
B | B |
G | G |
R | R |
Y | Y |
Ventilator (if used)
C C
W2 W
O O
Y1 Y1
Y2 | Y2 |
R | R |
Outdoor
Green Yellow
A
B
C
D
FUSE
A A
B B
C C
D D
User
Interface
Indoor
Unit