Wiring diagrams – Robertshaw 9420 User Manual
Page 5
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5
Typical heat pump with cool active reversing valve and auxiliary/emergency heat.
Typical heat pump with heat active reversing valve and auxiliary/emergency heat.
Typical heat pump with cool active reversing valve and auxiliary/emergency heat.
Does not have separate wire for emergency heat (jump W2 & E).
Typical heat pump with cool active reversing valve, auxiliary/emergency heat
and second stage of cooling. System fault indicator connected (L terminal).
O
B
9420 WIRING SAMPLE #1
Y1
E
G
W2
C
L
R
Y2
9420 WIRING SAMPLE #2
C
L
R
Y2
Y1
E
G
W2
O
B
9420 WIRING SAMPLE #3
B
Y1
E
G
W2
C
L
O
E
G
R
Y2
Jumper
O
B
9420 WIRING SAMPLE #4
C
W2
L
R
Y2
Y1
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Wiring Diagrams
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