CHECK SAFETY SHUTDOWN PERFORMANCE
:;:;:;:;:;:;:::;:;:;'.'*;i�,'.'.:t;t:·�;!;yJi1111= .
.i .. : •• ·::: ,,,
�'''\At:]Ciy2f'l
FIRE OR EXPLOSION HAZARD
CAN CAUSE PROPERTY DAMAGE, SEVERE
INJURY, OR DEATH
Perform the safety shutdown test any time work
Is done on a gas system.
NOTE: Read steps 1-7 below before starting and compare
to the safety shutdown or safety lockout tests recom
mended for the intermittent pilot (IP) module. Where
they differ, use the procedure recommended for the
module.
:·.·:·.·:·:'··=·�···.1::·T
iii
�-·i�r:]lfl'R!NljNGnl1l:·.··:
.
,:;11111111111111111111··11"'i1i1;Iilll'.
FIRE OR EXPLOSION HAZARD
CAN CAUSE PROPERTY DAMAGE, SEVERE
INJURY, OR DEATH
Improper clean Ing or reassembly may cause gas
leakage, When cleaning, ensure that control Is
reassembled properly and perform gas leak test.
Regular preventive maintenance is important in appli
cations that place a heavy load on system controls, such
as in the commercial cooking and agricultural and indus
trial industries because:
• In many such applications, particularly commercial
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 maintenance program should include regular
10
1. Turn gas supply off.
2. Set thermostat or controller above room temperature
to call for heat.
3. Watch for spark at pilot burner either immediately or
following prepurge. See IP module specifications.
4. H module has timed ignition, time length of spark
operation. See IP module specifications.
5. After the module locks out, open gas control knob and
ensure there is no pilot or main burner gas flow. With
modules that continue spark until pilot lights or system is
shut down manually, pilot should light when gas control
knob is opened.
6. Set thermostat below room temperature and wait one
minute.
7. Operate system through one complete cycle to en
sure all controls operate properly.
checkout of the gas control as outlined under STARTUP
AND CHECKOUT on page 8, and the control system as
described in the appliance manufacturer's literature.
Maintenance frequency must be determined individu
ally for each application. Some considerations are:
• Cycling frequency. Appliances that may cycle
100,000 times annually should be checked monthly.
• Intermittent use. Appliances that are used season
ally 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 environment. Since these
environments can cause the gas control to deterio
rate more rapidly, the system should be checked
more often.
The gas control should be replaced if:
• It does not perform properly on checkout or
troubleshooting.
• The gas control knob is hard to turn or push down, or
it fails to pop back up when released.
• The gas control is likely to have operated for more
than 200,000 cycles.
-
