VR8215S,T SINGLE STAGE VR8215Q,N TWO STAGE DIRECT IGNITION GAS CONTROLS
69-2253—07
6
4.
If necessary, adjust the pressure regulator to
match the appliance rating.
5.
If the desired outlet pressure or flow rate cannot
be achieved by adjusting the gas control, check
the gas control inlet pressure using a
manometer at the inlet pressure tap of the gas
control. If the inlet pressure is in the nominal
range (see Table 6), replace the gas control.
Otherwise, take the necessary steps to provide
proper gas pressure to the control.
6.
Two stage valves will require outlet pressure
verification for both HI and LO fire.
Check Safety Lockout
Slow-Opening (T, N) 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 or VR8215N,
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.
5.
Two stage valves will require outlet pressure
verification for both HI and LO fire.
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 sur-
face igniter either immediately or following pre-
purge. 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.
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)
Two Stage
Standard,
Slow
NAT
5.0-7.0
(1.2-1.7)
1.7 (0.4) Low
3.5 (0.9) High
1.5 - 2.5 Low
(0.4-0.6) Low
2.5-3.7 High
(0.6-0.9) High
LP
12.0-14.0
(3.0-3.5)
5.0 (1.3) Low
10.0 (2.5) High
4.5 - 7.0 Low
(1.1-1.7) Low
8.0-11.0 High
(2.0-2.7) High