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INSTALLATION INSTRUCTIONS

69-1174

S8701/S8702 Direct Spark

Ignition Controls

APPLICATION

S8701 and S8702 Direct Spark Ignition Controls are
designed for use in commercial cooking and other gas
heating applications which require direct ignition and flame
safety control of gas burners. S8701/S8702 controls are
used to ignite the main burner(s), sense the flame and
control the gas valve in these applications, see Table 1.

Model

Flame Sense

Trials for Ignition

Spark/Sense

Prepurge

S8701D

remote  

1

1

No

S8702D

remote

1

2

No

S8702F

remote

3

a

2

No

S8702K

remote

1

2

Yes

S8702M

remote

3

a

2

Yes

The S8701 is a single spark, single flame sense, direct
ignition control that is compatible with dual rod systems.

The S8702 is a dual spark, dual flame sense, direct
ignition control capable of igniting and sensing flame on
two separate gas burners that are fed by a single gas
valve. The S8702 is compatible with dual rod systems
only.

Table 1. S8701/S8702 Models.

a

S8702 F and M models include an auto-reset from lockout after 1 hour.

Planning the Installation

WARNING

Fire or Explosion Hazard.
Can cause property damage, severe injury,
or death.
Follow these warnings exactly:
1.

Plan the installation as outlined below.

2.

Plan for frequent maintenance as described in
the Maintenance section.

Review the following conditions that can apply to your
specific installation and take the precautionary steps
suggested.

Frequent Cycling

This control is designed for use on commercial cooking
appliances that typically cycle 400 times a day, year round.
Perform a monthly checkout.

Water or Steam Cleaning

If a control gets wet, replace it. If the appliance is likely to
be cleaned with water or steam, protect (cover) the control
and wiring from water or steam flow. Mount the control
high enough above the floor so it does not get wet during
normal cleaning procedures.

High Humidity or Dripping Water

Dripping water can cause the control to fail. Never install
an appliance where water can drip on the control. In
addition, high ambient humidity can cause the control to
corrode and fail. If the appliance is in a humid atmosphere,
make sure air circulation around the control is adequate to
prevent condensation. Also, regularly check out the
system.

IMPORTANT

Always install a splash cover to protect the
control from water damage.

Corrosive Chemicals

Corrosive chemicals can attack the control, eventually
causing a failure. If chemicals are used for routine
cleaning, avoid contact with the control. Where chemicals
are suspended in air, as in some industrial or agricultural
applications, protect the control with an enclosure.

Dust or Grease Accumulation

Heavy accumulations of dust or grease can cause the
control to malfunction. Where dust or grease can be a
problem, provide covers for the control to limit contamina-
tion.

Summary of Contents for S8701

Page 1: ...intenance section Review the following conditions that can apply to your specific installation and take the precautionary steps suggested Frequent Cycling This control is designed for use on commercial cooking appliances that typically cycle 400 times a day year round Perform a monthly checkout Water or Steam Cleaning If a control gets wet replace it If the appliance is likely to be cleaned with w...

Page 2: ...shielding should be provided by the appliance manufacturer verify proper air circulation is maintained when the appliance is installed Table 2 S8701 S8702 Ambient Temperature Ratings IMPORTANT If this is a replacement application follow the appliance manufacturer s instructions if avail able The manufacturer usually provides wiring diagrams start up and checkout instructions and the service proced...

Page 3: ...COMBINATION GAS CONTROL 2 0A MAX TEMPERATURE CONTOLLER LIMIT CONTROLLER TRANSFORMER M16232A FLAME SENSE ALARM VALVE GND VALVE GND 24 Vac GND 24 Vac BURNER GND SPARK ALARM IF USED Fig 2 S8701 Wiring Diagram Minimum VA Rating 24V transformer Total Valve Current in amperes S8701 S8702 in amperes 20 up to 0 6 0 15 30 0 6 to 1 0 0 15 40 1 0 to 1 4 0 15 55 1 4 to 2 0 0 15 Wiring General Precautions 1 Ch...

Page 4: ...d checkout procedures for other system components NOTE If one of the system components fail the S8701 S8702 will either not operate or it will go into safety lockout depending on the type of failure If the system does not perform as outlined in Start System and Check Trial for Ignition steps below refer to the SERVICE section to deter mine the cause Gas Leak Test If the gas control has been replac...

Page 5: ...rners for S8702 Shuts off spark after burner is lit The S8701 and S8702 are powered by a 24 Vac trans former and activated when the temperature control requests heat Operation is as follows When the S8701 S8702 control is activated by the temperature control s request for heat S8701 S8702 controls perform a safe start check that determines proper operation of the control before beginning the norma...

Page 6: ...BE SENSED AT BOTH BURNERS ON S8702 SPARK GENERATOR IS SHUT OFF LOCKOUT TIMER IS RESET IF FLAME CURRENT IS NOT SENSED B D J AND K MODELS GO INTO LOCKOUT AFTER ONE 1 TRIAL FOR IGNITION PERIOD LED IN ON SYSTEM MUST BE RESET MAIN BURNER OPERATION UNIT MONITORS BURNER FLAME CURRENT LOSS OF FLAME SPARK GENERATOR IS POWERED B D J AND K MODELS GO INTO LOCKOUT AFTER ONE 1 TRIAL FOR IGNITION PERIOD LED IS O...

Page 7: ...rol setpoint 5 F 3 C above room temperature Return setpoint to normal temperature setting or by re applying 24 Vac power to the S8701 S8702 control 5 Check ceramic insulator on flame sensor spark igniter or igniter sensor A cracked insulator will allow current to leak to ground Replace device if insulator is cracked START PREPURGE L AND M MODELS ONLY SAFE START CHECK TRIAL FOR IGNITION MAIN BURNER...

Page 8: ... they are clean and tight Grounding Connections A common ground is required for the burner spark igniter or igniter sensor mounting bracket the 24 Vac GND terminal and the GND burner terminal of the S8701 S8702 If ground is poor or erratic safety shutdown may occur occasionally even though operation is normal at time of checkout Therefore if nuisance shutdowns have been reported be sure to check g...

Page 9: ...e rod is immersed in the burner flame A bent flame rod bent mounting bracket or cracked ceramic insulator can affect flame signal Replace flame sensor if necessary Electrical Connections and Shorts Connections at the flame sensor must be clean and tight If wiring needs replacement use moisture resistant no 18 AWG wire rated for continuous duty up to 105 C 221 F Fig 8 Check Burner Flame Conditions ...

Page 10: ...CONTROL IF OKAY REPLACE GAS CONTROL NOTE IF UNIT GOES INTO LOCKOUT RESET SYSTEM CHECK CONTINUITY OF SENSOR CABLE S AND GROUND WIRES NOTE IF GROUND IS POOR OR ERRATIC SHUTDOWNS MAY OCCUR OCCASIONALLY EVEN THOUGH OPERATION IS NORMAL AT TIME OF CHECKOUT CHECK FOR EXCESSIVE HEAT AT SENSOR INSULATOR S TEMPERATURE ABOVE 1000 F 538 C CAUSES SHORT TO GROUND IF CHECKS ARE OKAY REPLACE UNIT NOTE IF UNIT GOE...

Page 11: ...69 1174 11 S8701 S8702 DIRECT SPARK IGNITION CONTROLS ...

Page 12: ...neywell Limited Honeywell Limitée 155 Gordon Baker Road North York Ontario M2H 3N7 69 1174 L C 4 99 Printed in Mexico Home and Building Control Honeywell Inc Honeywell Plaza P O Box 524 Minneapolis MN 55408 0524 www honeywell com ...

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