10 - hydronic piping, Figure 19, See figure 20) circ – Dunkirk Excelsior EXB Series User Manual
Page 21: Zone valve zone valve, Zone valve
(SEE FIGURE 20)
CIRC
DHW ZONE
VALVE
L
N
120 VAC
TO OIL
BURNER
120VAC
N
L
PRIMARY
PUMP
L
N
PRIORITY
PUMP
L
N
FROM BOILER
ZC
ZR
N
L
120 VAC
TO XFRM
R
24 VAC
C
X
X
TO DPM-2
X-X CONTACT
ZR ON
PRIORITY PUMP
PRIMARY PUMP
PRIORITY ON
STATUS
ZC ON
PRI ZONE 1
1
2
ZONE 4
4
3
1
3
ZONE 2
2
4
ZONE 3
1
2
3
4
2
1
3
4
OPTION SWITCHES
ZR-ZC
DPM-2
ZONE VALVE / PUMP
PRIORITY
Z1
Z2
Z3
Z4
T
T
T
T
T
T
T
T
AZ-4CP
120VAC TO
TRANSFORMER
24VAC FROM
TRANSFORMER
ZONE
VALVE
ZONE
VALVE
T-STAT
T-STAT
T-STAT
CONTROL
TANK
OR THERMOSTAT
HEATER, AQUASTAT
INDIRECT WATER
HYDROSTAT
MODEL 3250
ZONE
VALVE
RELAY
24VAC COIL
120VAC CONTACTS
FIGURE 19
ON
OPTION SWITCHES
ZONE VALVE / PUMP
ZR-ZC
DPM-2
PRIORITY
OFF
KEY
ON
21
Figure 19 - Multi-Zone Piping and Wiring With Zone Valves And Domestic Hot Water Priority (With
Zone Valve)
10 - HYDRONIC PIPING
*