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RETURN AIR IS VERY IMPORTANT
When installing a Clayton Furnace, return air MUST BE incor-
porated into the system. Return air can be provided by installing
a separate duct system or by tying into the cold air return of an
existing gas or oil furnace. The cold air return duct can be con-
nected to the furnace with either a factory manufactured U. S.
Stove filter box, model UFB908 or an equivalent fabricated from
sheet metal.
When installing a cold air return, the minimum size shall be a
16" x 20" or equivalent (320 sq. in.) in order to insure proper
furnace performance. Failure to provide return air ducts of the
specified size will void your warranty.
A filter should be installed in the cold air return. Furnace filters
should be checked and cleaned/replaced regularly.
If return air is not provided, the warm air distributed into your
home will be restricted and the efficiency of the furnace is de-
creased. Without a return air system, warm air will be drawn
into your basement, unnecessarily heating unused areas of the
home. In extreme cases, if your basement or utility room is fairly
airtight, the blowers on the furnace could depressurize the room
and pull toxic flue gases from the furnace, a gas water heater, or
gas furnace. The fumes could then be distributed throughout the
house.
NEGATIVE
PRESSURE IN
BASEMENT
COMBUSTION AIR
All fires need air (specifically oxygen) to burn. Furnaces, fire-
places, and coal burning furnaces need enough oxygen for com-
plete combustion of their fuels. The incomplete combustion that
takes place when a furnace is "air starved" causes carbon mon-
oxide (CO) to be formed in quantities that can be dangerous in-
side a well sealed house. Having a source of combustion air from
outside the home will prevent "air starvation" of the furnace. A
simple positive air supply can be constructed using dryer vent
and a modified termination.
FURNACE ASSEMBLY INSTRUCTIONS
Unpack your Furnace and insure that there is no shipping dam-
age. If damage exist, please contact your dealer immediately.
Your Clayton Furnace will require some assembly before opera-
tion. All needed hardware and components for the following as-
semblies are included within the parts boxes inside the furnace
and in the ash pan. Read and follow these instructions for proper
furnace assembly.
DOOR HANDLES
Insert door handle into door. From rear side of door, place a 1/2"
6
washer over the threaded part of the handle, then attach the lock
nut. Tighten the nut, then back off 1/4 turn to allow free opera-
tion of the handle.
Follow these same directions for the ash door handle assembly.
(2) Door Handle
(2) 1/2" Washer
(2) 1/2" Lock Nut
ASH DOOR SPIN DRAFT
Screw the spin draft onto the 3/8" x 2-1/2" carriage bolt. Then
screw the spin draft and bolt into the ash door allowing approxi-
mately 1/2" of the bolt to stick through the back side of the ash
door. Secure the bolt in place with the 3/8"-16 lock nut.
(1) Spin Draft
(1) 3/8-16 Carriage Bolt
(1) 3/8-16 Lock Nut
FUEL & ASH DOOR LATCH
With two 1/4-20 x 3/4 hex bolts each, attach the door latches
to the door latch mounting brackets on the left side of the door
frames as illustrated. The slots in the brackets and latches are for
door seal adjustment. Make the proper adjustments, then tighten
the nuts. The door's gasket should be snug against the door frame
on the furnace.
(1) Feed Door Latch
(1) Ash Door Latch
(4) 1/4-20 x 3/4 Hex Bolt
(4) 1/4-20 Kep Nut
Feed Door
Ash Door
Illustration
Illustration
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