Navien NFC-250/175H Installation Manual page 47
Condensing combi-boilers
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Also See for NFC-250/175H:
- Quick installation manual (4 pages) ,
- User's information manual (29 pages)
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With 24VAC Connections
Zone pump 1
(max. 2.5 A)
Zone pump 2
(max. 2.5 A)
Zone pump 3
(max. 2.5 A)
SUPPLY
RETURN
OUTDOOR
T/S_ZONE3
T/S_ZONE2
TEMPERATURE SENSOR
R
W
C
R
W
C
Pump Ground
lLWCO
AC24VL
AC24VN
T/S_ZONE1
R
W
C
SUPPLY
RETURN
OUTDOOR
TEMPERATURE SENSOR
T/S_ZONE3
T/S_ZONE2
T/S_ZONE1
R
W
C
R
W
C
R
W
C
Thermostat 3
Thermostat 2
Thermostat 1
Installing the System Piping
47
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