REV. 1/9/2010
Page 8 of 9
Equipment Danger Hazard. Improper adjustment of gas input and burner can cause carboning and/or unnecessary
shutdown of the system.
1. Do not exceed the input rating stamped on the appliance nameplate, or manufacture recommended burner orifice pressure
for size orifice(s) used. Be sure primary air supply to the main burner is properly adjusted for complete combustion. Follow
the instructions of the appliance manufacturer.
2. IF CHECKING GAS INPUT BY CLOCKING GAS METER: Be sure there is no gas flow through the meter other that to the
appliance being checked. Other appliances must remain off with the pilots extinguished (or the consumption must be
deducted from the meter reading). Convert the flow rate to Btuh as described in the GAS Controls Handbook, from 70-2602,
and compare to the Btuh input rating on the appliance nameplate.
Check Safety Shutdown Performance
Fire or explosion hazard. Can cause property damage, severe injury or death.
1. Preform the safety shutdown test any time work is done on a gas system. Place the gas control knob in the PILOT position.
Main burner should go off and the pilot should remain lit.
2. Extingush the pilot flame. The AF-1000 pilot gas flow should stop within three (3) minutes when using a standard
thermocouple. When using a quick drop out thermocouple, the pilot gas flow should stop within thirty (30) seconds. Safety
shutoff of the pilot gas proves complete shutdown because safety shutoff valve prohibits main burner and pilot gas flow.
3. Relight pilot burner and operate the system through one (1) complete cycle to ensure all controls operate properly.
MAINTENANCE
Fire or explosion hazard. Can cause property damage, severe injury or death.
Do not attempt to take apart the gas control or to clean it. Improper assembly and cleaning can cause unreliable operation.
Regular preventive maintenance is important in applications that place a heavy load on the system such as those used in
commerical cooking, agricultural, and industrial application because:
•
In many such applications, particularly commerical cooking, the equipment operates 100,000 to 200,000 cycles per year.
Such heavy cycling can wear out the gas control in one to two years.
•
Exposure to water, dirt, chemicals, and heat can damage the gas control and shut down the control system.
The maintance program should include regular checkout of the system as outlined in the Checkout section, and checkout of the
system as discribed in the appliance manufacturers literature.
Maintance frequency must be determined individually for each application, Some considerations are:
•
Cycling frequency. Appliances that may cycle 20,000 times annually should be checked monthly.
•
Intermittent use. Appliances that are used seasonally should be checked before shutdown and again before the next use.
•
Consequence of unexpected shutdown, Where the cost of an unexpected shutdown would be high, the system should be
checked more often.
•
Dusty, wet, or corrosive envirornment. Because these environments can cause the gas control to deteriorate more rapidly,
the system should be checked more often.
Any control should be replaced if it does not perform properly on checkout or service. In addition, replace any module if it is wet
or looks like it has been wet.
Fire or explosion hazard. Can cause property damage, servere injury or death.
Do not disassemble the gas control; it contains non replaceable components. Attempted disassembly or repair can damage the
control.
f i r e - p a r t s . c o m
