9
Mini Boiler Owners Manual
2015
Installation
Water Lines
The following layouts are a basic configurations for the boiler water connections. Contact your WoodMaster
dealer or Northwest Manufacturing for additional installation variations. Insulate the lines to prevent heat loss.
1” oxygen barrier line is recommended. The boiler can be plumbed as a primary loop or a primary secondary
loop.
The WoodMaster Mini boiler is an ASME certified pressure vessel and is designed and tested to be used as a
pressure vessel. Normal working pressure should be between 12 and 20 PSI, with a maximum working pres
-
sure of 30 PSI. Ensure that all lines and fittings used when plumbing the boiler are designed to be used in a
pressurized system.
Plug
Boiler
Supply
Water Flow
Burner
Temp
Probe
Boiler
Return
Drain
Pressure
Relief Valve
Pressure
Gauge
Air Bleeder
Air Bleeder
Water Fill/Drain
50 Gallon
Water Tank
(WoodMaster
part number
700-0210)
Return from
Heat Zone
Supply to
Heat Zone
Expansion Tank
Pump
Plug
Boiler
Supply
Water Flow
Burner
Temp
Probe
Boiler
Return
Drain
Pressure
Relief Valve
Pressure
Gauge
Air Bleeder
Air Bleeder
Water Fill/Drain
50 Gallon
Water Tank
(WoodMaster
part number
700-0210)
Return from
Heat Zone
Supply to
Heat Zone
Expansion Tank
Pump
Pump