Dunkirk Excelsior EXB Series - Manual (Page 20)

20
DHW Heater
Figure 18 - Piping and Wiring Single Zone System With Domestic Hot Water DHW Priority
10 - HYDRONIC PIPING
CONTROL
TANK
OR THERMOSTAT
HEATER, AQUASTAT
INDIRECT WATER
T-STAT
ZONE 2
PRIORITY
CONTROL
ARM-2P
ISOLATED
SWITCH
X1 X1
ISOLATED
SWITCH
X2
PRIORITY
120VAC CIRCULATORS
X2 L
1
ZONE 2
L N N
2
CT
WITH
X-X
+
PRIORITY ON
+ +
ZONE 1
FUSE
ELECTRONIC
DATA PORT
T + T
W
1
R
T
W
PRIORITY
ZONE
120 VAC
L N
PRIORITY ON
ZONE 2
ZONE MODULE
TO EXTRA
24 VAC @ 1 VA
2 T
R
COMMON
THERMOSTAT
6
TO 7 INCH LBS
TOR
QUE TERMINAL
SCRE
WS
CIRC
DHW
CIRC
L
N
120 VAC
TO OIL
BURNER
HYDROSTAT
MODEL 3250
FIGURE 18