VR8215S,M,T SINGLE STAGE DIRECT IGNITION GAS CONTROLS
69-2253EF—01
6
Check Safety Lockout
Slow-Opening (T) Controls Only
1.
With the system power off and the thermostat set
to call for heat, manually shut off the gas supply.
2.
Energize ignition control and start timing safety
lockout time. When spark ignition terminates, stop
timing.
NOTE:
When using the VR8215T, the specified
ignition control safety lockout time must
exceed 8.5 seconds for the system to
function properly.
3.
After spark cutoff, manually reopen the gas control
switch. No gas should flow to the main burner.
4.
Reset the system by adjusting the thermostat
below room temperature, wait 30 seconds, and
then move the thermostat setting up to call for
heat. Normal ignition should occur.
Table 6. Pressure Regulator Specification Pressures in inches WC (kPa).
1
Some models 3.0 - 5.0 (0.8 - 1.3).
Check Safety Shutdown
Performance
WARNING
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 through 7 before starting, and
compare to the safety shutdown or safety
lockout tests recommended for the direct
ignition (DI) module. Where different, use the
procedure recommended for the ignition
module.
1.
Turn off gas supply.
2.
Set thermostat or controller above room
temperature to call for heat.
3.
Watch for ignition spark or for glow at hot surface
igniter either immediately or following prepurge.
See Direct Ignition module specifications.
4.
Time the length of spark operation. See the Direct
Ignition 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 property damage, severe injury,
or death.
Do not disassembly 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.
Maintenance 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 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.
Model Type
Type of Gas
Nominal Inlet Pressure
Range
Factory Set Nominal Outlet
Pressure
Setting Range
Single Stage
Standard, Slow
NAT
5.0-7.0
(1.2-1.7)
3.5
(0.9)
2.5-3.5
1
(0.6-0.9)
1
LP
12.0-14.0
(3.0-3.5)
10.0
(2.5)
8.0-12.0
(2.0-3.0)