Hot Air Hook-Up - England's Stove Works 28-4000 Guide D'installation Et D'utilisation

THE FUNCTION OF THE ADD-ON FURNACE
The Add-On Furnace is designed to be a supplemental hot air heating system that
will connect to your existing heating system. The furnace will operate independently of
your existing system, while using the same hot air ducts that your present furnace uses.
The furnace comes standard with a 850 cfm (part number BM-1376) blower that pushes
hot air up both sides and across the top of the unit through an inner-duct chamber built
around the firebox. The heated air exits the unit through an 8-inch (203.2 mm) outlet
located on the top, near the front of the furnace. The 8-inch (203.2 mm) pipe connected at
this exit will route the heated air into your duct system.
A wood furnace does not recover as fast as a conventional furnace, so the unit is
equipped with a thermostat (part number AC-1339, see Figure 4) to turn the blower on
and off. This ensures that the blower will always be moving hot air into your duct system.
It is important that you maintain a continuous fire for maximum performance.
The furnace has a firebrick system that is designed to last for years. Replacing one
or two firebricks as necessary is fairly inexpensive, and the brick will hold more heat and
make your wood last longer as it burns.
HOT AIR HOOK-UP (See Fig. 3)
NOTE: The warm air supply-duct system should be constructed of materials with a
minimum temperature rating of 250 deg. F. Also, the plenums installed to the furnaces
are to be constructed of metal.
NOTE: The hot air supply outlet of this supplementary furnace should not be
connected to the cold-air return inlet of the central furnace, since a possibility exists that
components of the central furnace could overheat in this situation and cause the central
furnace to operate other than as intended.
Before making the hot air hook-up, you should have your unit positioned as close to
the flue connector as possible and have your flue pipe installed. If this has not been done,
please do so before continuing.
Located on the top, near the front of the unit is an 8-inch (203.2 mm) opening for
the mounting of the flue collar. When mounting this part, be absolutely sure it is fastened
securely to the opening, as this will be the hot air exit. Thirty gauge or thicker pipe should
be used from here to the hot air trunk line of your existing hot air system. Using the least
possible amount of pipe will help the heat transfer to your duct system. Cut an 8-inch
(203.2 mm) diameter hole in the main trunk line of the furnace duct, which is usually
located on the top of the central furnace. Place the 8 inch (203.2 mm) pipe from the wood
furnace into the hole (see Figure 3) and seal the connection with duct tape.
Thirty gauge or thicker galvanized pipe should be used to connect to the existing
furnace duct. Sheet metal screws should be used to secure each joint of pipe, and an
aluminum heat resistant tape can be wrapped around each joint to give an airtight seal.
See Figure 3 for more information, including the use of a Backflow Damper and 90-degree
elbow. Follow the manufacturer's instructions when installing a Backflow Damper. A
damper may be purchased from England's Stove Works (part number AC-BD8).
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