Dunkirk EXCELSIOR Series Installation, Operation & Maintenance Manual page 28

Figure 24 = Piping And Wiring Primary/Secondary Piping With Zone Valves And Domestic Hot
Water (With Circulator)
_USE FULL PORT ZONE
VALVE. --_
ZONE 4
ZONE 3
ZONE 2
CH CIRCULATORpuMP
(
ZONE 1 (PRIORITY ZONE)
DHW
CIRCULATOR
PUMP