17
BACKFLOW
PREVENTER
PRESSURE
REDUCING
VALVE
PRESSURE
GAUGE
AIR
SEPARATOR
LOW TEMP.
ZONE
ZONE #1
ZONE #2
SHUTOFF
VALVE
(TYPICAL)
HIGH
RETURN
LOW
RETURN
TEMPERATURE
GAUGE
EXPANSION
TANK
MIXING
VALVE
PRESSURE
RELIEF
VALVE
ZONE
CIRCULATORS
(TYPICAL)
T&P
GAUGE
DRAIN
PRESSURE
RELIEF
VALVE
CHECK
VALVE
RECIRCULATION
PUMP
SHOCK
ARRESTOR
CHECK
VALVE
RECIRCULATION
LINE
DOMESTIC
HOT WATER
DOMESTIC
COLD WATER
PRESSURE
RELIEF
VALVE
SPACE
HEAT
SUPPLY
FILL
VALVE
MAKE UP
WATER
IMG00124
Y-STRAINER
(TYPICAL)
TEMPERATURE
TEMPERATURE
HIGH TEMP.
HIGH TEMP.
Please note that these illustrations are meant to show system piping concept only, the installer
is responsible for all equipment and detailing required by local codes.
NOTICE
Figure 4-5 DHW Priority Piping - Multiple Temperature Space Heating
BACKFLOW
PREVENTER
PRESSURE
REDUCING
VALVE
PRESSURE
GAUGE
AIR
SEPARATOR
ZONE #1
ZONE #2
ZONE #3
SHUTOFF
VALVE
(TYPICAL)
SPACE HEAT
SUPPLY
TEMPERATURE
GAUGE
PRESSURE
RELIEF
VALVE
IMG00102
ZONE
CIRCULATORS
(TYPICAL)
UNION
Y-STRAINER
(TYPICAL)
BOILER
CIRCULATOR
T&P
GAUGE
DRAIN
PRESSURE
RELIEF
VALVE
CHECK
VALVE
MAKE UP
WATER
Figure 4-6 Multiple Tank Piping
Installation & Operation Manual
4
Hydronic piping
(continued)
Boiler must be sized to meet all space heating and domestic hot water loads simultaneously.
Failure to properly size the heat source can cause operational issues.
WARNING
