Williams 1403612, 3003612 Thermostat Installation, GAS Connection, Checking the GAS Piping

Gas Supply & Piping (cont.)

				GAS		PtPE SIZES
				NATURAL		GAS
				PIPE CAPACITY - BTU PER HOUR
				(INCLUDES	FITTINGS)
				PIPE	SIZE
LENGTH			OF
PIPE	-	FEET		1/2 inch		3/4 inch	1 inch
	20			92,000		190,000	350,000
	40			63,000		130,000	245,000
	60			50,000		105,000	195,000
				L.P.	GAS
				PIPE CAPACITY - BTU PER HOUR
				(INCLUDES	FITTINGS)
LENGTH			OF
PIPE	-	FEET		112 inch		3/4 inch	1 inch
	20			189,000		393,000	732,000
	40			129,000		267,000	504,000
	60			103,000		217,000	409,000

GAS CONNECTION

If installation is for L.P. Gas have L.P. installer use two-

stage regulation and make all connections from storage tank to furnace.

Use two pipe wrenches when making the connection to the valve to prevent turning or damage to gas valve. Connection between shut off valve and burner control assembly can be made with an A.G.A./C.G.A. design cer- tified flexible connector if allowed by local codes.

Tighten all joints securely.

CHECKING THE GAS PIPING

Test all piping for leaks. When checking gas piping to the furnace with gas pressure at less than 1/2 PSI, shut off manual gas valve for the furnace. If gas piping is to be checked with the pressure at or above 1/2 PSI, the furnace and manual shut off valve must be disconnected during testing. (SEE WARNING BELOW.) Apply soap suds (or a liquid detergent) to each joint. Bubbles forming indicates a leak. Correct even the slightest leak at once.

WARNING

DANGER OF PROPERTY DAMAGE,

BODILY INJURY OR DEATH.

NEVER USE A MATCH OR OPEN FLAME TO TEST FOR LEAKS. NEVER EXCEED SPECIFIED PRESSURES FOR TESTING. HIGH PRESSURES MAY DAMAGE THE GAS VALVE AND CAUSE OVER-FIRING WHICH MAY RESULT IN HEAT EX-

CHANGER FAILURE. LIQUID PETROLEUM (L.P.) GAS IS HEAVIER THAN AIR AND IT WILL SE'I-FLE

IN ANY LOW AREA, INCLUDING OPEN DEPRES- SION AND IT WILL REMAIN THERE UNLESS AREA IS VENTILATED.

NEVER ATTEMPT START-UP OF UNIT BEFORE THOROUGHLY VENTILATING AREA.

Thermostat Installation

MODELS 1403622, 1403621, 2203622, 2203621, 3003622 and 3003621

(All other models are equipped with a built-in thermostat)

1.If an old thermostat is being replaced and is in'a satisfactory location and the wiring appears to be in good condition, use existing wiring. If in doubt, use new wire.

2.If a new location is chosen or if this is a new installa- tion, thermostat cable must first be run to the location

selected. All wiring must agree with local codes and ordinances. These instructions cover bringing the wire down from the attic but it can be run from a basement

or crawl space using similar methods.

3.Before drilling hole in wall at selected location, drive a small finishing nail through the ceiling in the corner of the wall and ceiling above the thermostat location.

Pull the nail out and push a small stiff wire through the hole so it can be found in the attic. Drill a 1/2 inch hole

through the ceiling wall plate.

4.Probe for obstructions in the partition. Then drill a

112 inch hole through wall at selected location for thermostat.

5.From the attic, feed the thermostat cable or a stiff wire through the wall until even with thermostat location.

--11 m

ROUTE THERMOSTAT CABLE

SMAL I.

FINISH

NAi l, 10

LOCATE

H_ADER

CABL[

STIF WtRE

10 SNAG

CABLE