Dunkirk Excelsior EXB Series - Manual (Page 29)

29
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
ZONE
VALVE
T-STAT
T-STAT
T-STAT
CONTROL
TANK
OR THERMOSTAT
HEATER, AQUASTAT
INDIRECT WATER
HYDROSTAT
MODEL 3250
DHW
CIRC
RELAY
24VAC COIL
120VAC CONTACTS
FIGURE 24
ON
OPTION SWITCHES
ZONE VALVE / PUMP
ZR-ZC
DPM-2
PRIORITY
OFF
KEY
ON
BLR
CIRC