VR8215S,T SINGLE STAGE VR8215Q,N TWO STAGE DIRECT IGNITION GAS CONTROLS
5
69-2253—07
Fig. 5. Typical wiring connections with 24 volt
control in S89 Direct Ignition System.
STARTUP AND CHECKOUT
On-Off Switch
The on-off switch settings are as follows:
• OFF: Prevents main gas flow through the control.
• ON: Permits gas to flow into the control body. Under
control of the thermostat and direct ignition
module, gas can flow to the main burners.
NOTE:
Controls are shipped with the electronic on-
off switch in the ON position.
Perform Gas Leak Test
WARNING
Fire or Explosion Hazard.
Can cause property damage, severe injury
or death.
Perform Gas Leak Test every time work is done
on a gas system.
IMPORTANT
Do not spray soap and water solution on the
gas control. This can damage the control. Do
not use an excessive amount of soap and
water solution to perform the gas leak test.
Apply only to pipe thread areas.
Gas Leak Test
1.
Paint pipe connections upstream of the gas con-
trol with rich soap and water solution. Bubbles
indicate a gas leak.
2.
If a leak is detected, tighten the pipe connections.
3.
Light the main burner. Stand clear of the main
burner while lighting to prevent injury caused
from hidden leaks that could cause flashback in
the appliance vestibule.
4.
With the main burner in operation, paint the pipe
joints (including bushings) and the control inlet
and outlet with rich soap and water solution.
5.
If another leak is detected, turn the gas control
to off, tighten the joints and pipe connections.
6.
Replace the part if a leak cannot be stopped.
Turn On System
Push the on-off switch to the ON position.
Turn On Main Burner
Follow appliance manufacturer instructions or turn
thermostat up to call for heat.
Check and Adjust Gas Input
and Burner Ignition
IMPORTANT
1. Do not exceed input rating stamped on
appliance nameplate, or manufacturer’s
recommended burner orifice pressure for size
orifice(s) used. Make certain primary air
supply to main burner is properly adjusted for
complete combustion. Follow appliance
manufacturer instructions.
2. IF CHECKING GAS INPUT BY CLOCKING GAS
METER: Make certain there is no gas flow
through the meter other than to the appliance
being checked. Other appliances must remain
off with the pilots extinguished (or deduct their
consumption from the meter reading). Convert
flow rate to Btuh as described in form
70-2602, Gas Controls Handbook, and
compare to Btuh input rating on appliance
nameplate.
3. IF CHECKING GAS INPUT WITH
MANOMETER: Make sure the gas control is in
the OFF position before removing outlet
pressure tap plug to connect manometer
(pressure gauge). Also move the gas control
switch back to the OFF position when
removing the gauge and replacing the plug.
Before removing inlet pressure tap plug, shut
off gas supply at the manual valve in the gas
piping to the appliance or, for LP, at the tank.
Also shut off gas supply before disconnecting
manometer and replacing plug. Repeat Gas
Leak Test at plug with main burner operating.
NOTE:
Check the inlet pressure before adjusting the
pressure regulator.
Standard (S, Q) and
Slow-Opening (T, N) Models
1.
Carefully check the main burner lightoff. Make
sure that the main burner lights smoothly and
that all ports remain lit.
2.
Check the full rate manifold pressure listed on
the appliance nameplate. Gas control full rate
outlet pressure should match this rating.
3.
With main burner operating, check the control
flow rate using the meter clocking method or
check pressure using a manometer connected to
the outlet pressure tap on the control. See Fig. 7.
WHITE
BLUE
BLACK
BLUE
HOT
SURFACE
IGNITER-
SENSOR
VALVE
VALVE (GND)
24V
TH-W
24V (GND)
GND (BURNER)
S89C,G,J/S890C,G,J
HOT SURFACE
IGNITION CONTROL
L2
HSI
L1
HSI
LIMIT
CONTROLLER
BURNER
GROUND
THERMOSTAT
OR CONTROLLER
DUAL VALVE
COMBINATION
GAS CONTROL
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED. MAKE SURE L1 AND L2 ARE NOT
REVERSED; THIS WOULD PREVENT FLAME DETECTION.
ALTERNATE LIMIT CONTROLLER LOCATION.
SEN TERMINAL AND Q354 FLAME SENSOR ON D MODELS ONLY.
M27628
L1
(HOT)
L2
VENT
DAMPER PLUG
1
2
1
2
3
3
SEN
Q354 FLAME
SENSOR