Lochinvar Knight 151 Installation & Operation Manual page 19

3
Hydronic piping
Figure 3-6 Single Boiler - Multiple Temperatures
PRESSURE
REDUCING VALVE
BACKFLOW
PREVENTER
MAKE
UP
WATER
AIR SEPARATOR
BALL VALVE
(TYPICAL)
DRAIN POINT
(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.
Outdoor Knight Boiler Installation & Operation Manual
(continued)
TEMPERATURE
LOOP #1
PRESSURE
GAUGE
SYSTEM
SUPPLY
SENSOR
EXPANSION
TANK
MAY SUBSTITUTE
LOW LOSS HEADER
NOT TO EXCEED 4 PIPE DIA
OR MAX. OF 12" APART
Y-STRAINER
(RECOMMENDED)
BOILER
CIRCULATOR
FLOW CHECK
VALVE
SHIELDED CABLE TO
BOILER CONTROL
UNION
(TYPICAL)
TEMPERATURE /
PRESSURE DRAIN
GAUGE
TEMPERATURE
TEMPERATURE
LOOP #2
LOOP #3
120VAC TO PUMPS
24V SIGNALTO
MIXING VALVES
DOMESTIC
HOT WATER
HOT WATER
CIRCULATOR
INDIRECT
DHW TANK
BOILER
WIRES TO
LOOP SENSORS
MIXING VALVES
(TYPICAL)
MULTI-TEMP
LOOP CONTROL
ANTI-SCALD
MIXING VALVE
OUT
COLD
WATER
IN
IMG00372
19