Dunkirk DXL Series - Manual (Page 9)

9
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
7. Installation using circulators and zone valves are
shown in Figure 7, 8, 9 and 10 Pages 10, and 11. For
further piping information refer to AHRI Installation
and Piping Guide.
WARNING
Burn and scald hazard. Safety relief valve could
discharge steam or hot water during operation.
Install discharge piping per these instructions.
!
8. Install discharge piping from safety relief valve. See
Warning, Page 7.
6 - SUPPLY AND RETURN PIPING
BOILER ALTERNATE
CIRCULATOR
LOCATION
TO SYSTEM
FROM SYSTEM
V2 V1
EXPANSION
TANK
WATER INLET
SYSTEM
CIRCULATOR
Figure 5 - Bypass Piping Automatic Mixing Valve
Figure 6 - Bypass Piping - Fixed Low Temp Only Manual Mixing Valve