10 - hydronic piping, Figure 20, Circ – Dunkirk Excelsior EXB Series User Manual
Page 22
CIRC
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
ZONE
VALVE
T-STAT
T-STAT
T-STAT
CONTROL
TANK
OR THERMOSTAT
HEATER, AQUASTAT
INDIRECT WATER
HYDROSTAT
MODEL 3250
DHW
CIRC
FIGURE 20
ON
OPTION SWITCHES
ZONE VALVE / PUMP
ZR-ZC
DPM-2
PRIORITY
KEY
ON
OFF
22
Figure 20 - Piping and Wiring Multizone System With Zone Valves And Domestic Hot Water Priority
(With Circulator)
10 - HYDRONIC PIPING