Wood Master MB30 Series Owner's Manual - page 10
10
Mini Boiler Owners Manual
2015
Domestic Hot Water
The Domestic Hot Water/Flat plate Kit consists of a Wa
-
ter to Water Heat Transfer unit and the fittings needed
to hook it up. The unit mounts on the wall
VERTICALLY
in your utility room and is connected as shown.
Existing Forced Air
A water to air heat exchanger is inserted in the existing
plenum. In most cases the heat exchanger is placed in
a horizontal position, keeping all four sides level. The
air must be forced through the finned area of the heat
exchanger evenly. The hot water line coming from the
hot-water tube enters the bottom fitting of the heat
exchanger and exits the top fitting, which returns to
the boiler. If the plenum is too large or too small, it
must be altered to fit the heat exchanger properly.
Note: The water to air heat exchanger must be in
-
stalled below any existing off-peak electric coils
already in the plenum.
water in
WoodMaster
water out
Domestic Cold
Water in
Domestic Hot
Water out
WoodMaster
Installation
Filling With Water
Connect a garden hose or other supply line between a domestic water supply and the bottom of the water
tank. Slowly fill the tank first, venting the air out of the tank through the safety relief valve or air bleeder in
-
stalled on the top of the tank. Once the tank is full, open the relief valve on the boiler.
When the boiler is full, shut off both the water supply and the relief valve. Turn on the pump to circulate the
water and to push the air out of the system. Add water to the system as needed.
Routinely check to the water pressure level. If the pressure is out of range, add or remove water as needed.
The Use of boiler treatment is recommended.
The heat exchanger works on the same princi-
pal as your car heater. Air blows through the
heat exchanger, taking the heat from the water
and blowing it into your existing duct work.
Hot Water Supply from WoodMaster
(Always put supply in lower port.)
Cold Water Return to
WoodMaster
The following examples are for a primary loop
as a secondary heat source.
An expansion tank must be installed on the system along with an air bleeder. It is recommenced to install a
pressure relief valve on the boiler, and an air bleeder or pressure relief valve on the water tank. A pressure
gauge should also be installed on the boiler.
When plumbing the boiler, the boiler supply should be on the top of the boiler on either side, and the return
must be on the bottom of the opposite side. The supply and return CAN NOT be installed on the same side
of the boiler. Having the supply and return on opposite ends of the boiler allows for proper water circulation
within the boiler.
The pump that circulates the water through the boiler must have a flow of 10-12 GPM and the target tempera
-
ture difference between the supply and return is 20 degrees Fahrenheit.
WARNING: Do Not install close off valves on the boiler loop, closing of the loop while in operation can create
dangerous conditions. Follow all state and local codes for installing a pressurized system.