Lochinvar WH 55-399 Installation & Operation Manual page 46

6
Hydronic piping
Figure 6-11 Single Boiler - Full Flow - Single Temperature Zoned with Valves - DHW Piped as a Zone
PRESSURE
REDUCING VALVE
BACKFLOW
PREVENTER
MAKE UP
WATER
AIR SEPARATOR
EXPANSION
BALL VALVE
(TYPICAL)
DRAIN POINT
(TYPICAL)
CIRCULATOR
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.
46
ZONE #1
PRESSURE
GAUGE
SYSTEM SUPPLY
SENSOR
TANK
BOILER
RELIEF VALVE
UNION
(TYPICAL)
TEMPERATURE /
PRESSURE
ZONE #2 ZONE #3
Y-STRAINER
(RECOMMENDED)
PRESSURE
BOILER
DRAIN
GAUGE
Installation & Operation Manual
ZONE #4
ZONE VALVES
(TYPICAL)
DIFFERENTIAL
PRESSURE
BYPASS VALVE
(RECOMMENDED)
HOT
WATER
OUT
ANTI-SCALD
MIXING VALVE
COLD
WATER
IN
INDIRECT
DHW TANK