Groen TDHC Series, Руководство оператора

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OM-TDH/C
SYMPTOM WHO WHAT TO CHECK
Y Y
indicates items which must be performed by an authorized technician.
15
Safety Valve pops open Auth c. For defective thermostat. The thermostat should click when dial is
Service rotated above and below kettle temperature. If defective, replace.
Y
Rep Only d. For defective safety valve. If valve pops below 49 PSI, replace.
Y
Burners will not light. User a. That main gas supply valve is open. (handle in line with gas pipe).
b. Gas supply to the building.
c. That the kettle body is horizontal.
Auth d. Thermostat operation. The thermostat should click when the dial is
Service rotated to settings above and below the temperature of the kettle.
Y
Rep Only e. Momentary switch is being properly actuated.
System does not produce a Auth a. Thermostat, and close the contacts if they are open
Y
spark Service b. AC voltage between terminals “2" and “GR.” If it is not 24 Volt,
Rep Only replace the transformer
Y
c. That the jumper is securely installed between terminal “5" and
“GR.”
d. That the high tension cable is firmly attached and in good condition.
If cracked or brittle, replace the pilot.
Y
e. Pilot electric ceramic for crack or break.
Y
f. Pilot spark gap. Regap, if it is not 7/64 inch.
Y
g. Replace the electronic portion of the G770 system.
Y
Spark is present but the pilot Auth a. That the pilot valve is securely connected to terminals “1" and
will not light. Service “GR.” (Some models have the pilot valve grounded internally).
Y
Rep Only b. For 24 VAC at terminals “1" and “GR.” If 24V is not present,
replace the G770 ignition control.
Y
b. That gas pressure meets the control manufacturer’s
specifications.
Y
c. For gas at the pilot. If it is not flowing:
(1) Check the pilot gas line for kinks and obstructions.
Y
(2) Clean orifice, if necessary.
Y
(3) Replace the pilot valve.
Y
d. That the pilot spark gap is 7/64 inch and located in the pilot gas
stream. If not, adjust or replace the pilot.
Y
e. For drafts. Shield the pilot burner, if necessary.
Y
Pilot lights, but main burner Auth a. For 24 V between terminals “3" and “GR”. If voltage is not correct,
will not come on and spark Service replace the G770 ignition control.
Y
does not stay on. Rep Only b. That the gas pressure meets control manufacturer specifications.
Y
c. Electrical connections of main valve to terminals “3" and “GR” to
assure they are securely attached. If so, replace the main valve.”
Y
Pilot lights, but main burner Auth a. That sensor cable and high voltage cable are separated from each
will not come on, the spark Service other and not wrapped around any pipe or accessory.
Y
stays on. Rep Only b. Sensor cable, to ensure that there are secure attachments to
terminal “4" and the sensor.
Y
c. Sensor ceramic for cracks.
Y
d. That cable is not grounded out. If it is, correct the ground.
Y
e. That the sensor or sensor connector is not grounded out.
Y
f. Sensor cable for continuity and condition of insulation.
Y
g. Disconnect main valve lead from terminal “3," and sensor cable
from terminal “4.” Observing correct polarity, connect a DC micro
ammeter between the sensor cable terminal and terminal “4.”
Check that the current is 0.15 microamp or greater with only the
pilot operating. If it is, replace the G770 ignition control.
Y
h. For proper gas pressure.
Y
i. Clean pilot assembly, if necessary.
Y
j. Tighten all mechanical and electrical connections.
Y
k. Pilot application, and correct to increase sensor probe current, by:
(1) Increasing or decreasing pilot orifice size.
Y
(2) Shielding the pilot from drafts.
Y
l. Replace sensor or orifice.
Y
m. Replace G770 ignition control.
Y