31
BOILER
DHW
CIRCULATOR
CH CIRCULATOR
PRIORITY ZONE
CIRCULATOR
EXPANSION
TANK
WATER INLET
FLOW CONTROL
VAVLE
SHUT-OFF
VALVE
PRESSURE
REDUCER VALVE
CHECK VALVE
BALL VALVE
AIR SEPARATOR
ZONE VALVE
HOSE BIB
Piping Diagram 1
Single Zone system with domestic hot water priority
XvI - PIPING aND wIRING aPPENDIX
NOTE: NOT RECOmmENDED fOR aNTIfREEZE aPPLICaTIONS
Hotline indirect water heater
CH C1
L1
T-STAT
L2
CH C2
DHW C2
DHW C1
DHW T2
A2
A1
DHW T1
CH T2
CH T1
OUTDOOR
AIR SENSOR
aquastat or thermostat
Boiler Control Panel
DHW CIRC
L1 (HOT)
L2 N
120V AC
NO
L2
VAC
120
4
4
NC
AR822-II
TORQUE TERMINAL
6 TO 7 INCH LBS
ELEC
TR
ONIC FUSE
CIR
CUIT ON
AR822-TT
R
T
TT
NO
24V
W C
T
5
SCREWS
NC
6 6
CH CIRC
Wiring Diagram 1
Single Zone system with domestic hot water priority