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54 Installing the System Piping
3.7.9 Wiring Diagram - Air Handler
N
A/H
DH
W
PRI
L
N
L
N
L
N
L
N
L
Z3
Z2
Z1
SUPPLY
TEMPERATURE SENSOR
RETURN
OUTDOOR
T/S_ZONE3
R
W
C
T/S_ZONE2
R
W
C
T/S_ZONE1
R
W
C
AC24VN
AC24VL
lLWCO
R
W
C
T/S_Recir
COM
NO
NC
ZO
N
E_V/V3
COM
NO
NC
ZO
N
E_V/V2
COM
NO
NC
ZO
N
E_V/V1
N
A/H
DHW
PRI
L
N
L
N
L
N
L
N
Z2
Z1
<Air Handler>
SUPPLY
TEMPERATURE SENSOR
RETURN
OUTDOOR
T/S_ZONE3
R
W
C
T/S_ZONE2
R
W
C
T/S_ZONE1
R
W
C
<NFC-H>
Connect the pump wires to the system pump.
<NFC-H>
System Pump
(max. 2.5 A)
N
A/H
DH
W
PR
I
L
N
L
N
L
N
L
N
L
Z3
Z2
Z1
SUPPLY
TEMPERATURE SENSOR
RETURN
OUTDOOR
T/S_ZONE3
R
W
C
T/S_ZONE2
R
W
C
T/S_ZONE1
R
W
C
AC24VN
AC24VL
lLWCO
R
W
C
T/S
_Re
cir
COM
NO
NC
ZO
NE
_V
/V
3
COM
NO
NC
ZO
NE
_V
/V
2
COM
NO
NC
ZO
NE
_V
/V1
N
L
N
L
N
L
N
L
N
L
Z3
Z2
Z1
Pump Ground
Summary of Contents for NFC-250/175H
Page 67: ...67 Venting for Combustion Air WARNING The vent installation detector Detectable Undetectable...
Page 149: ...Memo...
Page 150: ......