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3 Hydronic piping (continued)
Figure 3-11 Single Boiler - Multiple Temperatures with DHW Piped as a Zone
EXPANSION
TANK
AIR SEPARATOR
BALL VALVE
(TYPICAL)
UNION (TYPICAL)
FLOW CHECK
VALVE (TYPICAL)
INDIRECT DHW
TANK
TEMPERATURE / PRESSURE
GAUGE
PRESSURE
GAUGE
DRAIN
DRAIN POINT
(TYPICAL)
BOILER CIRCULATOR
COLD WATER IN
ANTI-SCALD
MIXING VALVE
DOMESTIC
HOT WATER
CIRCULATOR
HOT WATER OUT
MAKE UP WATER
Y-STRAINER
(RECOMMENDED)
TEMPERATURE
LOOP 1
TEMPERATURE
LOOP 2
TEMPERATURE
LOOP 3
PRESSURE RELIEF
VALVE
BACK FLOW
PREVENTER
FROM
SYSTEM
TO
SYSTEM
SHIELDED CABLE
TO BOILER CONTROL
LOOP SENSOR (3X)
MULTI-TEMP
LOOP CONTROL
(OPTIONAL)
WIRES TO
LOOP SENSORS
120VAC TO
PUMPS
24VAC SIGNAL
TO MIXING VALVES
PRESSURE
REDUCING
VALVE
BOILER
IMG00412
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
Please note that the installer is responsible for ensuring DHW prioritization when piped as a zone.
NOTICE
CAUTION
Mixing valves are required for the protection of low temperature loops.
CAUTION
Indirect water heaters are capable of transferring a limited number of Btu’s into the water. Ensure boiler
output does not not exceed indirect water heater transfer capabilities.
Outdoor Knight XL Installation & Operation Manual
Please note that these illustrations show an indoor tank to demonstrate piping concept only.
NOTICE