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WOODMASTER OUTDOOR FURNACES • OWNER'S MANUAL
Existing Hot Water Heat
A Water-to-Water Heat Transfer Unit (0020-052) is used to connect to an
existing hot water boiler system.
NOTE: Any changes that are made to an existing boiler should be done by a qualified
plumber and follow all state and local codes .
Cold Water Return to
Outdoor Furnace
Existing Heat Zone
Return
Existing Hot Water
Boiler
Hot Water Supply from
Outdoor Furnace
Water-to-Water Heat
Transfer Unit
Circulating Pump for
Existing Hot Water
Heating System
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 furnace. 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 installed below any existing off-peak
electric coils already in the plenum .
After the installation of the add-on water to air exchanger, the air flow may
need to be increased to fuel furnaces, electric furnaces, and electric/gas
furnaces. Methods of doing this are:
Belt Drive System - Blower pulleys and motor pulleys may be changed
but the electric current flowing through the motor shall not exceed the
nameplate rating. A blower motor or larger power may be used.
Direct Drive System - The motor shall not be changed, however the speed of
the motor may be increased.
CAUTION
All wiring must follow state and local codes and should be done by a qualified
electrician . Wire thermostats according to directions provided by the manufacturer .
Cold Water Return
to Outdoor Furnace
Hot Water Supply from
Outdoor Furnace
(always put supply in
lower port)
The heat exchanger works on
the same principal as your car
heater. Air blows through the heat
exchanger, taking the heat from
the water and blowing it into your
existing duct work.