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Dunkirk Excelsior EXB Series User Manual

Page 30

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BOILER

ALTERNATE

CIRCULATOR

LOCATION

TO SYSTEM

FROM SYSTEM

V2

V1

CIRCULATOR

SHUT-OFF

VALVE

PRESSURE

REDUCER VALVE

CHECK VALVE

BALL VALVE

AIR SEPARATOR

ZONE VALVE

EXPANSION

TANK

WATER INLET

SYSTEM

CIRCULATOR

Figure 26 Bypass Piping (Fixed Low Temperature Only)

Adjust two throttling valves to maintain at least 130°F - 140°F in boiler return.

BOILER

WATER INLET

ALTERNATE

CIRCULATOR

LOCATION

TO SYSTEM

FROM SYSTEM

CIRCULATOR

SHUT-OFF

VALVE

PRESSURE

REDUCER VALVE

CHECK VALVE

BALL VALVE

3 WAY MIXING

VALVE

AIR SEPARATOR

HOSE BIB

EXPANSION

TANK

30

10 - HYDRONIC PIPING

Figure 25 - Bypass Piping Automatic Mixing Valve