Jack BIG BJ90 Owner's Manual - page 8
8
INTRODUCTION
This manual provides installation, operation, maintenance
instructions and parts ordering information for the Big Jack
Model BJ90 and the Super Jack Model SJ125 wood burning
furnaces.
IMPORTANT
Please read all instructions carefully before attempting
installation of this unit. Installation should only be done
by a qualified installer.
UNPACKING AND INSPECTION
Inspect the furnace for visible damage. The furnace is
shipped in one carton.
Inside the wood loading door is another carton. It contains a
gasket, conduit clip, wiring harness, fan and limit control,
transformer-relay, combustion blower and barometric draft
control.
A circulating blower, if ordered, is shipped in a separate car-
ton.
RULES FOR SAFE INSTALLATION AND OPERATION
1. Read these rules and the instructions carefully. Failure
to follow these rules and instructions could cause a
malfunction of the furnace. This could result in death,
serious bodily injury and/or property damage.
2. Check your local codes. The installation must com-
ply with them.
3. Use only the type of fuel approved for this furnace.
Over-firing will result in failure of heat exchanger and
cause dangerous operation.
4. You must have a sufficient supply of combustion air to
the area in which the furnace is located. (page 12)
5. Factory Built Chimneys: Connect this furnace to a
chimney that complies with NFPA 211 3-1.2. Factory
built chimneys for use with wood-burning appliances
shall comply with the HT requirements of UL 103 or
CAN/ULC-S629-M87. This means you must install
what is referred to as type HT all fuel chimney.
Masonry Chimneys: Connect this furnace to a chim-
ney that complies with NFPA 211 3-1.2. A field con-
structed chimney of solid masonry units, bricks,
stones, listed masonry chimney units, or reinforced
Portland cement concrete that is lined with suitable
chimney flue liners and built in accordance with the
provisions of Chapter 4 of this standard.
6. Follow a regular service and maintenance schedule
for efficient and safe operation.
7. Before servicing, allow furnace to cool. Always shut off
electricity and fuel to furnace when working on it. This
will prevent electrical shocks or burns.
LOCATING THE FURNACE
Locate the furnace as close to the chimney or flue as possi-
ble and near the center of the heat distribution system or
next to primary furnace if used.
Locate furnace where there is sufficient air supply for venti-
lation and proper combustion to comply with the minimum
clearances required for fire protection and accessibility. See
page 7 for typical installations. See also Combustion Air.
(page 12)
NOTE
It is recommended that a 2", noncombustible raised pad
be used for the furnace. This will prevent moisture from
getting under the furnace and causing corrosion.
PLACEMENT AND MINIMUM CLEARANCES
For installation of our Jack Line furnace, the National Fire
Protection Association (NFPA) Standard 90B specifies the mini-
mum standard clearances to combustible surfaces as summarized
below.
CLEARANCE CHART
Above Top of Plenum
18”
From the Front
48”
From Sides and Back
18”
From Flue Pipe
18”
From Existing Furnace
6”
From Horizontal Warm Air Duct:
Within 3 ft. of Plenum
18”
Within 3 to 6 ft. Plenum
6”
Beyond 6 ft. of Plenum
1”
All heat runs
1”
PARTS ASSEMBLY
1. Install the combustion blower & gasket to the provided
opening just below the wood-loading door on the front
of the furnace.
2. Attach the 4x4 junction box with the transformer/relay
to the mount provided at the top right hand side of the
front of the furnace.
3. Insert the fan-limit control into the sheet metal plenum
approximately 6 inches above the furnace.
4. Wire according to the enclosed wiring instructions &
local codes. (See page 13)