Lochinvar Knight 151 Installation & Operation Manual page 21

3
Hydronic piping
Figure 3-8 Single Boiler - Multiple Temperatures with DHW Piped as a Zone
BACKFLOW
PREVENTER
MAKE
UP
WATER
AIR SEPARATOR
BALL VALVE
(TYPICAL)
DRAIN POINT
(TYPICAL)
Y-STRAINER
(RECOMMENDED)
BOILER
CIRCULATOR
UNION
DRAIN
(TYPICAL)
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.
Indoor tank shown for illustration purposes.
Please note that the installer is responsible for ensuring DHW prioritization when piped as a zone.
NOTICE
Indoor tank shown for illustration purposes.
(continued)
PRESSURE
REDUCING VALVE
PRESSURE
GAUGE
MIXING VALVES
(TYPICAL)
SYSTEM
SUPPLY
SENSOR
EXPANSION
TANK
MAY SUBSTITUTE
LOW LOSS HEADER
NOT TO EXCEED 4 PIPE DIA OR MAX. OF 12" APART
TEMPERATURE /
PRESSURE GAUGE
BOILER
Outdoor Knight Boiler Installation & Operation Manual
TEMPERATURE TEMPERATURE
LOOP #1 LOOP #2
24V SIGNAL TO
MIXING VALVES
120VAC TO PUMPS
MULTI-TEMP TO
DOMESTIC LOOP CONTROL
HOT WATER
CIRCULATOR
FLOW
CHECK
VALVE
PRESSURE
RELIEF
VALVE
BOILER
WIRES TO
TEMPERATURE
LOOP
LOOP #3
SENSORS
SHIELDED CABLE TO
BOILER CONTROL
ANTI-SCALD
HOT WATER
MIXING VALVE
OUT
COLD
WATER
IN
INDIRECT
DHW TANK
IMG00374
21