UTICA BOILERS MGB-50J Installation, Operation & Maintenance Manual page 9

Figure 4 - Bypass Piping With Mixing Valve
Figure 5 - Bypass Piping - Fixed Low Temp Only With Zone Valve
Installation using circulators and zone valves are
7.
shown in Figures 6 through 9. For further piping
information refer to AHRI Installation and Piping
Guide.
4 - CONNECTING SUPPLY AND RETURN PIPING
TO SYSTEM
WATER INLET
EXPANSION
TANK
CIRCULATOR
SHUT-OFF
VALVE
TO SYSTEM
SYSTEM
CIRCULATOR
WATER INLET
EXPANSION
CIRCULATOR
SHUT-OFF
VALVE
BOILER
ALTERNATE
CIRCULATOR
PRESSURE
BALL VALVE
REDUCER VALVE
3 WAY MIXING
CHECK VALVE
VALVE
V1 V2
TANK
BOILER
PRESSURE
BALL VALVE
REDUCER VALVE
ZONE VALVE
CHECK VALVE
Burn and scald hazard. Safety relief valve could
discharge steam or hot water during operation.
Install discharge piping per these instructions.
Install discharge piping from safety relief valve. See
8.
Warning, Page 7.
9
FROM SYSTEM
LOCATION
AIR SEPARATOR
HOSE BIB
FROM SYSTEM
ALTERNATE
CIRCULATOR
LOCATION
AIR SEPARATOR
WARNING
!