Figure 18 Piping And Wiring Single Zone System With Domestic Hot Water DHW Priority
FIGURE 18
HYDROSTAT
MODEL 3250
TO OIL
BURNER
L
120 VAC
N
10 - HYDRONIC PIPING
DHW Heater
INDIRECT WATER
HEATER, AQUASTAT
OR THERMOSTAT
ARM-2P
CONTROL
WITH
PRIORITY
20
TANK
CONTROL
PRIORITY
ZONE
DATA PORT
+
T
1
ELECTRONIC
W
FUSE
+
+
+
CT
PRIORITY ON
X-X
1
X1 X1
X2
X2
L
N
PRIORITY
ISOLATED
ISOLATED
SWITCH
SWITCH
120VAC CIRCULATORS
DHW
CIRC
PN 240011579 REV D [08/01/2018]
T-STAT
THERMOSTAT
ZONE 2
COMMON
T
T
2 T
R
W
R
24 VAC @ 1 VA
ZONE 1
ZONE 2
TO EXTRA
ZONE MODULE
PRIORITY ON
L N
2
L
N
ZONE 2
120 VAC
CIRC