REV. 4-6-2010
Page 10 of 11
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.
3.
IF CHECKING GAS INPUT WITH MANOMETER: Both the input and output pressure taps have a captive screw. To
measure the pressure of the tap, loosen, but do not remove the captive screw, attach a plastic tube with a 1/3 in. shell
I.D. and connect the manometer. After checking the pressure, turn the gas control knob to the OFF position, Before
opening the outlet pressure tap, be sure the gas control knob is in the OFF position. Before opening the inlet pressure
tap, shut the gas supply at the manual valve in the gas piping to the appliance or, for LP, at the tank. Repeat the Gas
LeakTest at the pressure tap with mainburner operating.
MAINTENANCE
Fire or explosion hazard. Can cause property damage, severe injury or death.
Do not attempt to take a part 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
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, and 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.
SERVICE
Fire or explosion hazard. Can cause property damage, severe injury or death.
Do not disassemble the gas control; it contains non replaceable components. Attempted disassembly or repair can
damage the control.
Fire or explosion hazard. Can cause property damage, severe injury or death.
Exactly follow the warnings and the lighting instructions.
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