Groth 8391B - Manual (Page 9)

8
3. Pilot gas supply shutoff or low pilot gas supply pressure.
4. Restriction in pilot gas supply line or inspirator air intake. Inspirating venturi nozzle is factory drilled according to
the pilot gas pressure specified on order. Strainer or filter cartridge may be plugged; clean or replace as
required.
5. Ignition component failure:
a. Electrode shorting to ground
b. Spark disc failure
c. Transformer failure
d. Poor electrical connection between transformer and electrode
e. Failure of relay which powers ignition transformer
f. Carbon/soot build-up on ignition electrode tip
6. Utilize the “Push-to-test” capability of the panel lamps to check the condition of the bulbs.
TABLE 4
BOLT TORQUE
MAIN BURNER FLANGE (1)
BOLT SIZE BOLT TORQUE
[Ft. - Lb.]
5/8" - 11 UNC 110
3/4" - 10 UNC 200
7/8" - 9 UNC 320
(1)
It is assumed that studs and nuts are
plated and torqued without lubricants.
TABLE 5
RECOMMENDED SPARE PARTS
(1)
QTY PART
NUMBER
DESCRIPTION
1 604003900 Transformer, Ignition
1 IEA8391 Electrode, Ignition
(2)
1 604004100 Insulated Connector
1 604004200 Wire, Ignition
1 TCP839101S0 Thermocouple, pilot
1 OSP839154XX Orifice Spud (3)
2 347320X51 Pressure Gauge (3)
1 3574000F2 Y-Strainer
1 604003500 Filter, Cartridge
1 359400001 Valve, Solenoid
1
112000500
Temperature
controller
(1)
When ordering, specify pilot gas and supply
pressure.
(2)
Damaged electrodes may be returned to
Groth Corporation for a complete rebuild.
Spare parts are also available for electrode
repair.
(3)
P/N may vary, please specify pilot gas and
supply pressure for proper sizing.