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Gas Supply
and Piping (Con't)
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 1/2PSI, the furnace
and manual shut off valve must be disconnected during
testing. (SEE WARNING BELOW.) Apply soapsuds (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 PRES-
SURES FOR TESTING. HIGHER 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 SETTLE
IN ANY LOW AREA, INCLUDING OPEN DEPRES-
SIONS AND IT WILL REMAIN THERE UNLESS
AREA IS VENTILATED.
NEVER ATTEMPT STARTUP OF UNIT BEFORE
THOROUGHLY VENTILATING AREA AND SMELL-
ING NEAR THE FLOOR FOR GAS ODOR.
GAS PIPE SIZES
NATURAL GAS
PiPE CAPACITY
- BTU PER HOUR
(INCLUDES FITTINGS)
PIPE SIZE.
LENGTH
OF
PIPE-FT.
20
40
60
LENGTH
OF
PIPE-FT.
2O
4O
60
I/2"
314"
I"
92,000
190.000
350,000
63,000
130,000
245,000
50.000
105,000
195.000
L.P. GAS
PIPE CAPACITY
- BTU PER HOUR
(INCLUDES FITTINGS)
I/2"
j
189,000
129,000
103.000
3/4"
I"
393,000
732,000
267.000
504,000
217,000
409,000
Thermostat
Installation
Models 2509611, 2509612, 3509611, 3509612, 5009611 and
5009612
utilize a built-in thermostat control system
operated by a heat sensing bulb located in the burner
compartment.
I
IMPORTANT
Handle the bulb with care. Do not kink the connect-
ing tubing.
I
Models 2509621, 2509622, 3509621, 3509622, 5009621
and 5009622 are operated by a millivolt type thermostat.
Current to the thermostat is supplied by the pilot generator.
Anticipation
settings are not required.
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
4,
5,
6.
7.
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 (see Fig. 19 page 16).
Probe for obstructions
in the partition.
Then drill a
1/2-inch hole through
wall at selected
location
for
thermostat.
From the attic, feed the thermostat cable or a stiff wire
through wall until even with thermostat location.
Snag thermostat
cable through hole and pull cable
through hole in wall so that 6 inches of cable protrudes.
Route cable to wall furnace.
CAUTION
Do not run wire behind flanges of Header Plate or
in any location where it might be damaged. Avoid
splicing thermostat wire unless the spliced wires are
properly cleaned, soldered and taped.
NOTE
Use #18 Ga. wire as supplied for maximum length of 20
feet. If longer length is needed, use #16 Ga. for maximum
length of 25 feet.
m15m
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