USSC Clayton 1800GC Installation & Operator's Manual page 6

The connection of the add-on to an existing furnace imposes a
greater work-load on the air-circulating blower.
compensating adjustments are made, the additional restriction
will reduse air flow, and overheating of the existing furnace can
result. To provide a reference point for later adjustments,you
must test air flow before any installation work begins.
There are two methods of evaluating existing air flow: the static
pressure drop method and the temperature rise method.
HOTBLAST FURNACE MODIFICATIONS HOTBLAST FURNACE MODIFICATIONS HOTBLAST FURNACE MODIFICATIONS HOTBLAST FURNACE MODIFICATIONS HOTBLAST FURNACE MODIFICATIONS
1. Cut and insert a piece of sheet metal of sufficient thickness to
provide a tight fit over the opening on the back of the Hotblast
furnace.
CONNECTING HOT AIR DUCT TO FURNACE CONNECTING HOT AIR DUCT TO FURNACE
CONNECTING HOT AIR DUCT TO FURNACE CONNECTING HOT AIR DUCT TO FURNACE CONNECTING HOT AIR DUCT TO FURNACE
We strongly recommend that the hot airduct work be installed by a home
heating specialist. If doing the installation yourself, before you decide
which installation will best suit your needs, we recommend that you consult
a qualified heating technician and follow his recommendations as to the
most safe and efficient method of installation.
6' (182.88cm)
1" MIN.
(2.54 cm)
EXISTING
FURNACE
(if used)
2. Cut an opening in the side of the Hotblast furnace that will face
Unless
your existing furnace. (see illustration)
(15.24 cm)
BEND BACK
FLANGE
(5.08 cm)
2" MIN.
HOT AIR
PLENUM
HOTBLAST
FURNACE
6
6"
CUTOUT
8" H x 14" W
10" (25.4 cm)
(20.32 x 35.56 cm)
16" (40.64 cm)
6' (182.88cm)
DUCTWORK DUCTWORK
DUCTWORK DUCTWORK DUCTWORK
INSTALLATION INSTALLATION INSTALLATION INSTALLATION INSTALLATION
HOT AIR DUCT
And Minimum And Minimum And Minimum And Minimum And Minimum
MINIMUM CLEARANCES
Clearances Clearances Clearances
Clearances Clearances
TO COMBUSTIBLES
FINISHED
OPENING
10" x 16"
1" (2.54 cm)
1" MIN.
(2.54 cm)