Table of Contents
Advertisement
VR8105, VR8205, AND VR8305 DIRECT IGNITION COMBINATION GAS CONTROLS
Check Safety Shutdown Performance
WARNING
Fire or Explosion Hazard.
Can cause severe injury, death or property
damage.
Perform the safety shutdown test any time work is
done on a gas system.
NOTE: Read steps 1 through 7 before starting, and
compare to the safety shutdown or safety
lockout tests recommended for the direct ignition
(DI) module. When different, use the procedures
recommended for the module.
1. Turn off the gas supply.
2. Set thermostat or controller above room tempera-
ture to call for heat.
3. Watch for ignition spark or glow at hot surface
igniter either immediately or following prepurge.
See DI module specifications.
4. Time the length of spark operation. See the DI
module specifications.
5. After the module locks out, open the manual gas
cock and make sure no gas is flowing to the main
burner.
6. Set the thermostat below room temperature and
wait one minute.
7. Operate system through one complete cycle to
make sure all controls operate properly.
MAINTENANCE
WARNING
Fire or Explosion Hazard.
Can cause severe injury, death or property
damage.
Do not disassemble the gas control; it contains no
replaceable components. Attempted disassembly,
repair, or cleaning can damage the control,
resulting in gas leakage.
Regular preventive maintenance is important in
applications in the commercial cooking and agricultural
and industrial industries that place a heavy load on
system controls, 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
checkout of the control as outlined in the Startup and
Checkout section, and the control system as described in
the appliance manufacturer literature.
69-1226—04
Maintenance frequency must be determined individually
for each application. Some considerations are:
• Cycling frequency. Appliances that 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 environments. Since these
environments can cause the gas control to deteriorate
more rapidly, the system should be checked more
often.
The system should be replaced if:
• It does not perform properly on checkout or
troubleshooting.
• The gas control is likely to have operated for more than
200,000 cycles.
• The control is wet or looks as if it has been wet.
SERVICE
WARNING
Fire or Explosion Hazard.
Can cause severe injury, death or property
damage.
Do not disassemble the gas control; it contains no
replaceable components. Attempted disassembly,
repair, or cleaning can damage the control,
resulting in gas leakage.
CAUTION
Equipment Damage.
Can burn out valve coil terminals.
Never apply a jumper across (or short) the valve
coil terminals, even temporarily.
After servicing, verify proper system operation.
If Main Burner Does Not Come On With
Call For Heat
1. Confirm the gas control knob is in the ON position.
2. Adjust thermostat several degrees above room
temperature.
3. Using ac voltmeter, measure across MV terminals
at gas control.
4. If voltage is incorrect or not present, check control
circuit for proper operation.
5. If proper voltage is present, replace gas control.
10
Hide quick links:
Advertisement
Table of Contents
