Lochinvar WH 55-399 Installation & Operation Manual page 47

6
Hydronic piping
Figure 6-12 Single Boiler - Full Flow - Single Temperature Zoned with Circulators - DHW Piped as a Zone
PRESSURE
REDUCING VALVE
BACKFLOW
PREVENTER
MAKE UP
WATER
SYSTEM SUPPLY SENSOR
AIR SEPARATOR
EXPANSION
TANK
Y-STRAINER
(RECOMMENDED)
DRAIN POINT
(TYPICAL)
It is the responsibility of the installer to ensure that the minimum flow requirements of the boiler are met at
NOTICE
all times during boiler operation. If the minimum flow requirements cannot be met at any time the boiler
must be hydraulically separated from the system.
Please note that these illustrations are meant to show system piping concept only, the installer is responsible
NOTICE
for all equipment and detailing required by local codes.
(continued)
ZONE #1
PRESSURE
GAUGE
PRESSURE
RELIEF VALVE
UNION
(TYPICAL)
TEMPERATURE /
PRESSURE
GAUGE
Installation & Operation Manual
ZONE #2
ZONE #4
ZONE #3
DOMESTIC
HOT WATER
CIRCULATOR
ANTI-SCALD
BALL VALVE
MIXING VALVE
(TYPICAL)
BOILER
DRAIN
FLOW CHECK
VALVE
(TYPICAL)
ZONE CIRCULATORS
(TYPICAL)
HOT
WATER
OUT
COLD
WATER
IN
INDIRECT
DHW TANK
47