PRESSURE REG.-PILOT ADJ.-AIR ADJ.-ORIFICE DATA
PRESSURE REGULATOR SERVICE
NOTE:
The unit and its individual shut-off valve must
be disconnected from the gas supply piping system
during any pressure testing of that system at test
pressures in excess of 1/2 PISG (3.45 K Pa.).
The appliance must also be- isolated from the gas
supply piping system by closing it's individual manual
shut-off valves during any pressure testing of the gas
supply piping system at test pressures equal to or less
than 1/2 PSIG (3.45L Pa.) as stated by the American
National Standards Z83.11-1984. Copies of this
Standard are available from the American Gas
Association, 1515 Wilson Blvd., Arlington, VA 22209.
The pressure regulator is located at the rear of the unit
downstream of the shut-off valve. If the pressure
regulator requires service, this may be accomplished
by turning off the gas supply upstream of the shut-off
valve and pressure regulator and then removing both
of these parts.
Blockage of the pressure regulator leak limiter will
result in eratic burner operation and pilot outage.
NOTE:
Prior to replacing a pressure regulator, in an
effort to correct problems traced to this component,
remove and clean the leak limiter.
PILOT BURNER ADJUSTMENT
Remove lower panel assembly (spring clip mounted)
and light both pilot burners.
Adjust pilot flame heights to approximately 1/2"
Flame should impinge on the sensing bulbs located
directly below the pilot burner flames. See Detail A for
location of the pilot. Both pilot valves are located in the
front center of the burner compartment.
AIR ADJUSTMENT
Although the burner air supply is adjusted before
shipment, it should be checked at the time of in-
stallation. Excessive air will cause flames to lift off a
burner when cold or may cause flash-back during
normal cycling of unit, particularly when propane gas is
used.
Insufficient air will cause flames to burn with a yellow
tip and result in carbon accumulation in the flame
chamber and heat exchange tubes.
BURNER ORIFICE DATA
FOR ALL UNITS MANUFACTURED AFTER OCTOBER 1, 1983
INCLUDING "E" UNITS
BURNER ORIFICE DATA
NOTE: DATA ALSO APPLIES TO E-UNIT CONSTRUCTION
MODEL
MAXIMUM INPUT
PER BURNER
PRESSURE REG.
SETTING
ORIFICE DRILL
SIZE
GAS
SG-2SM, SG-22, SG-2
30,000
6" W.C.
#38
NAT.
SG-2SM, SG-22, SG-2
30,000
10.0" W.C.
#1/16
PROPANE
SG-10SM, SG-1010, SG-10
35,000
6' W.C.
#35
NAT.
SG-10SM, SG-1010, SG-10
35,000
10.0" W.C.
#53
PROPANE
FOR ALL UNITS MANUFACTURED BEFORE OCTOBER 1, 1983
INCLUDING "E" UNITS
BURNER ORIFICE DATA
MODEL
MAXIMUM INPUT
PER BURNER
PRESSURE REG.
SETTING
ORIFICE DRILL
SIZE
GAS
SG-2SM, SG-22
30,000
3.7" W.C.
#36
NAT.
SG-2SM, SG-22
30,000
10,00" W.C.
#1/16
PROPANE
SG-10SM, SG-1010
35,000
3.7 " W.C.
#33
NAT.
SG-10, SG-1010
35,000
10.0" W.C.
#53
PROPANE
REPLACEMENT OF REGULATOR, OR SHUTOFF VALVE
INCLUDING "E" UNITS
•
Turn off gas supply upstream of unit.
•
Break gas connection at shut-off valve.
•
Break compression fittings at front manifold.
•
Remove (4) bolts (inside center chamber) to rear
manifold support.
•
Disconnect wires to solenoid at wire nuts.
•
Pull manifold out back of unit.
•
Remount manifold by reversing procedure listed
above.
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