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Hydronic piping, Installation & operation manual – Lochinvar Knight XL 399 - 800 User Manual

Page 37

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Installation & Operation Manual

37

6

Hydronic piping

(continued)

EXPANSION TANK

AIR SEPARATOR

PRESSURE REDUCING

VALVE

BACK FLOW
PREVENTER

BALL VALVE

(TYPICAL)

UNION (TYPICAL)

PRESSURE RELIEF
VALVE

FLOW CHECK

VALVE (TYPICAL)

INDIRECT DHW
TANK

BOILER

TEMPERATURE / PRESSURE

GAUGE

PRESSURE GAUGE

DRAIN

DRAIN POINT
(TYPICAL)

BOILER CIRCULATOR

COLD WATER IN

ANTI-SCALD
MIXING VALVE

SYSTEM SUPPLY SENSOR

SYSTEM CIRCULATOR

TO

SYSTEM

FROM SYSTEM

DOMESTIC
HOT WATER
CIRCULATOR

HOT WATER OUT

MAKE UP WATER

NOT TO EXCEED 4 PIPE DIAMETERS OR

A MAXIMUM OF 12” APART

Figure 6-7 Single Boiler - Primary/Secondary Piping

NOTICE

System flow should always remain higher than the required flow for the boiler(s) when the boiler(s) is in operation to
prevent short cycling and high limit issues.