Filter
Top Products
Primary / Secondary Piping
Figure 4-6_Multiple Boilers Zoned with Circulators
BOILER 1
(LEADER)
INDIRECT
DHW TANK
ANTI-SCALD
MIXING VALVE
COLD
WATER
IN
TEMPERATURE /
PRESSURE
GAUGE
AIR SEPARATOR
ZONE #1
ZONE #2
ZONE #3
ZONE #4
BALL VALVE
(TYPICAL)
UNION
(TYPICAL)
PRESSURE
RELIEF VALVE
DRAIN POINT
(TYPICAL)
MAKE UP WATER
HOT
WATER
OUT
BOILER
CIRCULATOR
BACKFLOW
PREVENTER
PRESSURE
REDUCING VALVE
PRESSURE
GAUGE
EXPANSION
TANK
ZONE #1
ZONE #2
ZONE #3
ZONE #4
ZONE CIRCULATORS
(TYPICAL)
FLOW CHECK
VALVE
SYSTEM SUPPLY
SENSOR
(WHEN USED)
RECIRCULATION
LOOP
AQUASTAT
RELIEF VALVE
Y-STRAINER
(RECOMMENDED)
MAY SUBSTITUTE LOW LOSS HEADER
NOT TO EXCEED 12" APART
BOILER 2
(LEADER 1)
4 Water connections (continued)
31
Installation & Service Manual