Dunkirk EXCELSIOR Series Installation, Operation & Maintenance Manual page 26

Figure 23 - Piping and Wiring Primary/Secondary Hulti Zone System Piping With Zone Valves
And Domestic Hot Water (With Zone Valve)
ZONE 4
SYSTEM
CI RCULATOR
ZONE 2
ZONE 1 (PRIORITY ZONE)
*USE FULL PORT' ZONE .......
VALVE, FOR OPTIMUM TAN_
PERFORMANCE, CONSIDEF_
USING ZONE CIRCULATOR i
SEE FIGURE 24 |
\-C') 2" MAX APART I--_-
......... FLOW iN SECONDARY) I
W#ZERINL
EXPANSION
TANK
T
_ BOILER
CIRCULATOR
BOILER
t\ /I
"'i 'j
ALTERNATE BOILER
CIRCULATOR
LOCATION