S8600B,C,H,M; S8610B,C,H,M; S8670D,E,J,K INTERMITTENT PILOT GAS IGNITION CONTROL
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MAIN VALVE
S8600 B,C; S8610 B,C; S8670 J,K
GND 24V
MV MV/PV PV
(BRN) GND
24V
MAIN VALVE
STAGE 2
THERMOSTAT
AIR PROVING SWITCH
SENSE
SENSOR
3
Step 2: Verify control system ground.
The igniter, flame sensor, and ignition module must share a common
ground with the main burner. Use thermoplastic insulated wire with
a minimum rating of 221°F (105° C) for the ground wire; asbestos
insulation is not acceptable. If the temperature at the wire could
exceed 221°F (105°C), use a shield to protect the wire
PILOT
1ST OPERATOR
COM
GROUND
STAGE 1
2ND OPERATOR
R W2 W1
2
PILOT BUR NER/
from radiant heat generated by the burner. Connect the ground
wire as follows:
TWO STAGE DUAL VALVE
COMBINA TION GAS CONT ROL
4
LIMIT
CONTROLLER
COMBUS TION AIR BLOWER RELAY
IGNITER
PILOT GAS SUPPLY
a.
Fit one end of the ground wire with a female 1/4 in.
quick-connect terminal and connect it to the male
quick-connect GND (BURNER) terminal on the ignition
module.
b.
Strip the other end of the wire and fasten it
1
L1 L2 (HOT)
L1 L2
COMBUSTION
(HOT)
1
AIR BLOWER
under the igniter bracket mounting screw. If nec- essary,
use a shield to protect the ground wire
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2 ALTERNATE LIMIT CONTROLLER LO CATION.
3
MAXIMUM CABLE LENGTH 3 FT. [0.9 M].
4
CONTROLS IN 24V CIRCUIT MUST NOT BE IN GROUND LEG TO TRANSFORMER.
from radiant heat.
c.
The burner serves as the common grounding area. If
there is not good metal-to-metal contact
Fig. 8. S8600 B,C; S8610 B,C; S8670 J,K connections with
remote flame sensing in a heating system with a two-stage gas
control and power-assisted combustion.
CHECKOUT
Check out the gas control system:
•
At initial installation of the appliance.
•
As part of regular maintenance procedures. Maintenance
intervals are determined by the application. See “Planning the
Installation” on page 2 for more information.
•
As the first step in troubleshooting.
•
Any time work is done on the system.
WARNING
Fire or Explosion Hazard.
Failure to heed these warnings may cause fire or
explosion with property damage, injury, or loss of life.
1.
If you smell gas or suspect a gas leak, turn off gas at
manual service valve and evacuate the building. Do
not try to light any appliance, do not touch any
electrical switch or telephone in the building until you
are sure no spilled gas remains.
2.
Gas leak test must be done as described in the steps
below on initial installation and any time work is done
involving the gas piping.
Step 1: Perform Visual Inspection.
a.
With power off, make sure all wiring connec- tions
are clean and tight.
b.
Turn on power to appliance and ignition module.
c.
Open manual shutoff valves in the gas line to the
appliance.
d.
Perform Gas Leak Test ahead of gas control if piping
has been disturbed.
GAS LEAK TEST (UPSTREAM OF GAS CONTROL)
Paint the gas control gasket edges and all pipe connections
upstream of the gas control with a rich soap and water
solution. Bubbles indicate gas leaks. Tighten the joints and
screws or replace component to stop gas leak. Recheck
with soap and water solution.
between the burner and ground, run a lead from the
burner to ground.
NOTE: Earth ground is not required.
Step 3: Review Normal Operating
Sequence and Module Specifications.
a. See “Operation” on page 8 and “Specifications” on page 2.
Step 4: Reset the Module.
a.
Turn the thermostat to its lowest setting.
b.
Wait one minute.
As you do the remaining steps, watch for points where operation
deviates from normal. Refer to the Troubleshooting guide on
page 15 to correct problems.
Step 5: Check Safety Shutoff Operation.
a.
Turn gas supply off.
b.
Set thermostat or controller above room temper- ature to
call for heat.
c.
Watch for spark at pilot burner either immedi- ately or
following prepurge. See device label.
d.
Time spark from start to shutoff. See device label.
e.
On all continuous retry models, wait 5 minutes. Ignition
sequence should start again followed by shutoff after 90
seconds maximum.
f.
Open manual gas cock and make sure no gas is flowing
to pilot or main burner.
g.
Set thermostat below room temperature and wait
one minute before continuing.
Step 6: Check Normal Operation.
a.
Set thermostat or controller above room temper- ature to
call for heat.
b.
Make sure pilot lights smoothly when gas
reaches the pilot burner.
c.
Make sure main burner lights smoothly without
flashback.
d.
Make sure burner operates smoothly without floating,
lifting, or flame rollout to the furnace vestibule or heat
buildup in the vestibule.
e.
Perform a gas leak test in the appliance
.
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