Slant/Fin HWT-120 - Manual (Page 7)

7 INDIRECT FIRED WATER TANK
BOILER
CONTROLS
DOMESTIC HOT OUT
DOMESTIC COLD IN
* THERMAL
EXPANSION
TANK
BOILER FEED
BOILER RETURN
RECIRCULATION
WHT-80
DOMESTIC HOT
OUT
DOMESTIC COLD IN
BOILER FEED
BOILER RETURN
BOILER
CONTROLS
* THERMAL
EXPANSION
TANK
TANK CONTROL
TEMP & PRESSURE RELIEF
VALVE
BALL VALVE
CIRCULATOR
ZONE VALVE/
CHECK VALVE
DRAIN VALVE
HOT WATER BOILER
HOT WATER BOILER
MULTIPLE TANK INSTALLATION
IV INSTALLATION/PIPING (cont’d)
PIPING
TANK INSTALLATION
Notes: Thermal Expansion Tank is required whenever a backflow preventer or no return valve is present in the system. Locate
the Thermal Expansion Tank on the Domestic Cold water line between the heater and backflow preventer or no return valve.