Dunkirk Excelsior EXB Series - Manual (Page 27)

27
10 - HYDRONIC PIPING
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
T-STAT
T-STAT
T-STAT
CONTROL
TANK
OR THERMOSTAT
HEATER, AQUASTAT
INDIRECT WATER
HYDROSTAT
MODEL 3250
FIGURE 23
DHW ZONE
VALVE
RELAY
24VAC COIL
120VAC CONTACTS
ZONE
VALVE
BLR
CIRC
ON
OPTION SWITCHES
ZONE VALVE / PUMP
ZR-ZC
DPM-2
PRIORITY
OFF
KEY
ON