Gas Supply And Piping; Fasten Furnace Top - Williams 5508332 Owner's Manual

IMPORTANT
Mounting Your Furnace (cont.)
TO PREVENT DAMAGE TO WIRING, MAKE SURE
NOT TO PINCH THE WIRES BETWEEN FURNACE
COMPONENTS. KEEP THEM ROUTED AWAY FROM
THE BURNER.
Resecure the air discharge shield across the top of the
burner and controls compartment, Small leg of "L" shape
must be positioned toward floor, pointing away from front
of furnace.
over the back flange of furnace top and screwing to wall.
See Fig. 20, page 16.
FASTEN FURNACE TOP (RECESSED MOUNTING)
Fasten furnace top by drilling two (2) holes through the
side flanges of furnace top and securing with two (2)
screws or nails into the wall studs. See Fig. 20, page 16.
FASTEN FURNACE TOP (SURFACE MOUNTING)
Fasten furnace top to wall using two (2) metal anchors
(packed in plastic bag with thermostat) by placing them
CAUTION
Be careful not to damage furnace components or wir-
ing when drilling holes,
Gas Supply and Piping
Gas control valve, within the furnace, is shipped with a
seal over gas inlet tapping. Do not remove seal until ready
to connect piping.
WARNING
DANGER OF PROPERTY DAMAGE,
BODILY INJURY OR DEATH.
MAKE SURE THE FURNACE IS EQUIPPED TO
OPERATE ON THE TYPE OF GAS AVAILABLE.
MODELS DESIGNATED AS NATURAL GAS ARE TO
BE USED WITH NATURAL GAS ONLY, FURNACE
DESIGNATED FOR USE WITH LIQUIFIED
PETROLEUM (L.P) GAS HAVE ORIFICES SIZED
FOR COMMERCIALLY PURE PROPANE GAS,
THEY CAN NOT BE USED WITH BUTANE OR A
MIXTURE OF BUTANE AND PROPANE.
GAS SUPPLY
For Natural gas, the minimum inlet gas supply pressure
for the purpose of input adjustment is 5" water column.
The Maximum inlet gas supply pressure is T' water
column.
For L.E gas, the minimum inlet gas supply pressure for
the purpose of input adjustment is 11" water column. The
maximum inlet gas supply pressure is 13" water column.
Gas pressure and input to the burners must not exceed
the rated input and pressure shown on the rating plate. On
Naturel Gas the manifold pressure should be 4 inches
water column. The manifold pressure should be 10.5 inch-
es water column for L.P. Gas. See page 32 for operation
above 2000 feet altitude Office change may be required to
suit gas supplied. Check with your local gas supplier.
ORIFICE SIZES
Furnace Technical Information, page 32, shows the
correct orifice sizes for the different input ratings when
using Natural or L.P Gas.
GAS PIPING
The gas supply line must be of adequate size to handle
the BTU/HR requirements and length of the run for the
unit being installed.
Determine the minimum pipe size from Fig. 23, page 18,
basing the length of the run from the gas meter or source
to the unit.
DROP
I PIPED CR0UN0 JOINT
i_ I GAS aN,0N
SUPPLy
tlANUAL SHUT OFF
VALVE
DF(Op
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