Lochinvar Wall Mount Boiler WH 55-399 - Manual (Page 43)

Installation & Operation Manual
43
6
Hydronic piping
(continued)
BOILER INDIRECT
DHW TANK
DOMESTIC
HOT WATER
CIRCULATOR
ANTI-SCALD
MIXING VALVE
COLD
WATER
IN
TEMPERATURE /
PRESSURE
GAUGE
AIR SEPARATOR
BALL VALVE
(TYPICAL)
UNION
(TYPICAL)
DRAIN POINT
(TYPICAL)
MAKE
UP
WATER
HOT WATER
OUT
BOILER
CIRCULATOR
BACKFLOW
PREVENTER
PRESSURE
REDUCING VALVE
PRESSURE
GAUGE
EXPANSION
TANK
MIXING VALVES
(TYPICAL)
FLOW CHECK
VALVE
SYSTEM
SUPPLY
SENSOR
DRAIN
Y-STRAINER
(RECOMMENDED)
MAY SUBSTITUTE
LOW LOSS HEADER
TEMPERATURE
LOOP #1
TEMPERATURE
LOOP #2
TEMPERATURE
LOOP #3
NOT TO EXCEED 4 PIPE DIA
OR MAX. OF 12" APART
PRESSURE
RELIEF
VALVE
SHIELDED CABLE TO
BOILER CONTROL
120VAC TO PUMPS
24V SIGNAL TO
MIXING VALVES
WIRES TO
LOOP SENSORS
MULTI-TEMP
LOOP CONTROL
IMG00190
Figure 6-8 Single Boiler - Multiple Temperature - DHW Priority
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
CAUTION
Mixing valves are required for the protection of low temperature loops.