Dunkirk EXCELSIOR EXB4075 Installation, Operation & Maintenance Manual page 31

Figure 27 - Bypass Piping (4-Way Valve Option With Circulator On Supply Side)
TO SYSTEM
WATER INLET
Figure 28 - Recommended Piping for Combination Heating and Cooling (Refrigeration) System
CIRCULATOR
SHUT-OFF
VALVE
SUPPLY MAIN TO
COMBINED HEATING
& COOLING SYSTEM
10 - HYDRONIC PIPING
EXPANSION
TANK
PRESSURE
REDUCER VALVE
CHECK VALVE
SHUT OFF
VALVES
BOILER
ALTERNATE
CIRCULATOR
LOCATION
BALL VALVE
WATER CHILLER
4-WAY MIXING
VALVE
BOILER
AIR CUSHION
TANK
CIRCULATOR
31
FROM SYSTEM
AIR SEPARATOR
FLOW CONTROL
HOSE BIB
VALVE
SHUT OFF
VALVES
RETURN MAIN FROM
COMBINED HEATING
& COOLING SYSTEM