Lochinvar Knight XL 400 - 801 Installation & Operation Manual page 41

6
Hydronic piping
Figure 6-7 Single Boiler - Multiple Temperatures
TEMPERATURE
TEMPERATURE
LOOP 1
LOOP SENSOR (3X)
MAKE UP WATER
AIR SEPARATOR
PRESSURE
GAUGE
BACK FLOW
PREVENTER
BALL VALVE
(TYPICAL)
EXPANSION
PRESSURE
TANK
REDUCING
VALVE
INDIRECT DHW
TANK
PRESSURE
RELIEF
VALVE
HOT WATER OUT
ANTI-SCALD
MIXING VALVE
COLD WATER IN
Mixing valves are required for the protection of low temperature loops.
CAUTION
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)
TEMPERATURE
LOOP 3
LOOP 2
DOMESTIC
HOT WATER
CIRCULATOR
WIRES TO LOOP SENSORS
120VAC
TO PUMPS
Y-STRAINER (RECOMMENDED)
BOILER CIRCULATOR
FLOW CHECK VALVE (TYPICAL)
UNION (TYPICAL)
Installation & Operation Manual
TO
SYSTEM
FROM
SYSTEM
SHIELDED CABLE
TO BOILER CONTROL
BOILER
MULTI-TEMP
LOOP CONTROL
(OPTIONAL)
24V SIGNAL TO
MIXING VALVES
IMG00175
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