68 0135 S8610U Universal Intermittent Pilot Module TRADELINE RA832A

User Manual: TRADELINE RA832A

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S8610U
Universal Intermittent Pilot Module
PRODUCT DATA

FEATURES
• Provides up to 1.0A pilot and 2.0A main valve current
rating.
• System uses rectification principle for flame sensing.
• For use with separate igniter and sensor or
combination igniter-sensor. Q345, Q348, Q362, Q373
or Q381 Igniter-sensor recommended as combination
igniter-sensor; Q179C with igniter and sensor
mounted on one bracket, or Q354 Sensor with Q345,
Q348, Q362, Q373 or Q381 Igniter-sensor
recommended as separate igniter and sensor.

APPLICATION
The S8610U Universal Replacement Ignition Module is
designed to provide easy field replacement of a wide range of
intermittent pilot ignition modules manufactured by
Honeywell, Robertshaw, Johnson and others. The S8610U
Module provides ignition sequence, flame monitoring, and
safety shutoff for intermittent pilot central furnaces, residential
boilers, and other heating appliances.

• Q3450/Q3480 Hot Surface Pilot hardware plugs
directly into system control.
• Can be used on natural or LP gas; provides 100
percent shutoff on ignition failure. Waits six minutes
nominal following shutoff, then reinitiates the pilot
ignition sequence. The ignition trial-shutoff-wait cycle
repeats until the pilot lights or the call for heat ends.
• Replaces numerous Honeywell and competitor
modules.
• Capacitive discharge spark output.
• Temperature rating is -40°F to 175°F (-40°C to 79°C)
when used with 1.0A or less main valve; -40°F to 165°F
(-40°C to 74°C) when used with 1.0 to 2.0A main valve.

Contents
Application ...........................................................................
Features ..............................................................................
Specifications ......................................................................
Ordering Information ...........................................................
Planning the Installation ......................................................
Installation ...........................................................................
Startup and Checkout .........................................................
Maintenance ........................................................................
Operation ............................................................................
Troubleshooting ..................................................................
ANSI Standards ..................................................................

® U.S. Registered Trademark
Copyright © 1996 Honeywell Inc. • All Rights Reserved

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68-0135-2

S8610U UNIVERSAL INTERMITTENT PILOT MODULE
Relative Humidity Rating:
5 to 90% RH at 95°F.

SPECIFICATIONS
IMPORTANT
The specifications given in this publication do not
include normal manufacturing tolerances. Therefore,
units may not exactly match the listed specifications
Also, units are tested and calibrated under closely
controlled conditions, and some minor differences in
performance can be expected if those conditions are
changed.

Flame Failure Response Time:
0.8 sec at 1.0 mA flame current.
Terminals:
SENSE: 3/16 in. male quick connect.
All Other Terminals Including Ignition: 1/4 in. male quick
connects. Molex plug for connection to Honeywell
D80D or D892 Vent Damper.

SUPER TRADELINE® Models

Flame Current:
1 uA minimum.

SUPER TRADELINE® models are selected and packaged for
ease of handling, ease of stocking, and maximum replacement
value. SUPER TRADELINE® model specifications are the
same as those of standard models except as noted.

Mounting:
Mounts in any position except with terminals up. However,
recommended mounting position is with terminals down to
provide maximum protection from dripping water or dust
accumulation. Fasten with no. 6-32 machine or no. 8
sheetmetal screws of appropriate length. See Fig. 1.

SUPER TRADELINE® Model Available:
S8610U Universal Intermittent Pilot Module.
Electrical Ratings:
Voltage: 24V, 60 Hz.
Current Draw: 1A pilot valve, 2A main valve.
Valve Contact Rating: 0.2A.

Underwriters Laboratories Inc. Component Recognized:
File no. MH15564, Guide no. MCCZ2.
IAS Design Certified: C2030011.

Trial for Ignition:
90 seconds maximum, then 100% shutoff (pilot and main
gas).

Other System Components

Continuous Retry:
Five-minute minimum (six-minute nominal) delay if pilot fails
to light during trial for ignition. After delay, trial for ignition is
repeated. This sequence (trial, delay, trial, delay) continues
until pilot lights or call for heat ends.

These modules provide operating control of an intermittent
pilot system. Additional components required to complete the
system must be ordered separately:
• Dual valve combination gas control designed for
intermittent pilot.
• Combination pilot burner/igniter-sensor or separate igniter
and sensor on pilot burner bracket.
• Ignition cable.
• Transformer.
• 24V thermostat.
• High limit and other auxiliary controls, as required.

Spark Generator Output:
13 kV peak at 25 pF load.
Thermostat Anticipator Setting:
0.2A plus pilot valve rating plus main valve rating.

Dual Valve Combination Gas Control:
Any that meet current ratings listed below. VR8204,
VR8440 or VR8520 are recommended.
S8610U: 1.0A pilot, 2.0A main valve.

Ambient Temperature Rating:
-40°F to +175°F (-40°C to +79°C) with main valve rated
1.0A or less.
-40°F to +165°F (-40°C to +74°C) with main valve rated
1.0A to 2.0A.

Pilot Burner/Igniter-Sensor:
See Table 1.

ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number, or specify:
1. SUPER TRADELINE® order number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:
1. Your local Home and Building Control Sales Office (check white pages of your phone directory).
2. Home and Building Control Customer Logistics
Honeywell Inc., 1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.

68-0135—2

S8610U UNIVERSAL INTERMITTENT PILOT MODULE

3/16
(2)
(5)

3-3/8
(86)
3-3/16
(81)
3-15/16
(100)

2 (51)

1-1/32
(26)

3-3/8 (86) (2)

1/4
(6)

2-5/8 (67)

3/16 (2)
(5)

5-7/16 (138)
M1123A

Fig. 1. Approximate ignition module dimensions in in. (mm).
Table 1. Pilot Burner/Igniter-Sensors.

Table 3. Recommended Ignition Cable for Field Assembly.

Flow Rate*

Pilot Burner/
Igniter-Sensor

cfh

m3/hr

Q345

0.8

0.02

Q348

1.5

0.04

UL Style 3217

Q362

0.5

0.014

UL Style 3257

Q373

0.8

0.02

Q381

0.5

0.014

Q179C

1.8

0.05

Combined

Separate

Cable Type

Temperature Rating
°C

°F

10,000

150

302

10,000

250

484

Transformer:
Add current ratings of module, pilot valve, main valve, vent
damper and any other components of the control system to
determine transformer-size requirement. Use a 30 VA or
larger transformer if a vent damper will be connected to the
S8610U Vent Damper Connector.

Q354 with Q345, Q348, Q362 or Q381.
*With natural gas at 7.0 in. wc (1.7 kPa).

Thermostat:
Use open-close switch type, or independently-powered
electronic, 24V thermostat capable of switching rated control
system load. Before using electronic thermostat powered
through the heating/cooling controls, consult thermostat
manufacturer to assure proper control system operation.

Ignition Cable:
Use Honeywell preassembled cable, see Table 2, or
assemble locally. Use the cable recommended in Table 3 (or
equivalent), insulated female 1/4 in. quick connect and
insulated Rajah connector receptacle. Maximum
recommended length is 36 in. (914 mm).

High Limit and Other Auxiliary Controls:
As specified by the heating appliance manufacturer.

Table 2. Honeywell Preassembled Ignition Cables
(UL Style 3257).
Cable
Part
Number

Voltage
Rating (rms)

Ignition Modules Replaced
Length

Module
End

WARNING

Igniter End

394800-30

30 in.

1/4 in. quick
connect,
insulated

Rajah connector
receptacle, 90
degree rubber
boot

394801-30

30 in.

1/4 in. quick
connect,
insulated

Rajah connector
receptacle, straight
rubber boot

Check Table 4 before replacing an existing intermittent
pilot module with the S8610U. If the existing module is
not listed, do not use the S8610U to replace it unless
you are certain the specifications of the S8610U
match those of the existing module.

68-0135—2

S8610U UNIVERSAL INTERMITTENT PILOT MODULE
The S8610U replaces existing flame rectification type
intermittent pilot ignition modules with the following
characteristics:
• Single rod (local sense) or two rod (remote sense) flame
sensing.
• Non-100 percent shutoff, 100 percent shutoff/lockout, or
100 percent shutoff/continuous retry.
• Natural or LP gas.
• Shutoff/lockout times of 30 seconds or longer.
• Prepurge times of four seconds or shorter.
• Pilot burners with flow rates of 1500 Btuh or less.
• With or without vent dampers.

Frequent Cycling
These controls are designed for use on appliances that
typically cycle three to four times an hour only during the
heating season only. In year-round applications with greater
cycling rates, the control can wear out more quickly. Perform
a monthly checkout.

Water Or Steam Cleaning
If a module or gas control gets wet, replace it. If the appliance
is likely to be cleaned with water or steam, protect (cover) the
controls and wiring from water or steam flow. Mount the
controls high enough above the bottom of the cabinet so they
do not get wet during normal cleaning procedures. Use a
NEMA 4 enclosure for the ignition module; see the Electronic
Ignition Service Manual, form 70-6604.

A complete list of the specific Honeywell and other modules
that the SUPER TRADELINE® S8610U is designed to
replace is provided in Table 4.
The S8610U SUPER TRADELINE® package contains
complete, easy-to-use instructions, plus the accessories
required to adapt the existing spark cable (Rajah, stud, nail,
or other) to the spark terminal on the S8610U. It also provides
labels to help assure proper marking of the wires attached to
the existing module.

High Humidity or Dripping Water

The S8610U SUPER TRADELINE® Universal Module is not
designed to replace controls with the following characteristics:
• Flame sensing other than by flame rectification (White
Rodgers Cycle-Pilot®, Robertshaw thermal sensing).
• Flame rectification modules with shutoff/lockout times of
less than 30 seconds, prepurge times of more than four
seconds, or pilot burners larger than 1500 Btuh.
• Standing pilot appliances.

If the appliance is in a humid atmosphere, make sure air
circulation around the controls is adequate to prevent
condensation. Also, regularly check out the system. A NEMA
4 enclosure is recommended for the ignition module; see the
Electronic Ignition Service Manual, form 70-6604.

Dripping water can cause the module to fail. Never install an
appliance where water can drip on the controls.
In addition, high ambient humidity can cause the gas control
to corrode and fail.

Corrosive Chemicals

Honeywell provides additional control packages to
accomplish these replacements. See the Honeywell
Electronic Ignition Service Manual, form 70-6604, or call your
Honeywell wholesaler.

Corrosive chemicals can attack the module and gas control,
eventually causing a failure. If chemicals are used for routine
cleaning, make sure they cannot reach the controls. Where
chemicals are suspended in air, as in some industrial or
agricultural applications, use a NEMA 4 enclosure for the
ignition module; see the Electronic Ignition Service Manual,
form 70-6604.

PLANNING THE INSTALLATION

Dust or Grease Accumulation
Heavy accumulations of dust or grease can cause controls to
malfunction. Where dust or grease can be a problem, provide
covers for the module and the gas control to limit
contamination. A NEMA 4 enclosure is recommended for the
ignition module; see the Electronic Ignition Service Manual,
form 70-6604.

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.

Heat
Excessively high temperatures can damage controls. Make
sure the maximum ambient temperature at the control does
not exceed the rating of the control. If the appliance operates
at very high temperatures, use insulation, shielding, and air
circulation, as necessary, to protect the controls. Proper
insulation or shielding should be provided by the appliance
manufacturer; verify that proper air circulation is maintained
when the appliance is installed.

When intermittent pilot systems are used on central heating
equipment in barns, greenhouses, and commercial properties
and on heating appliances such as commercial cookers,
agricultural equipment, industrial heating equipment and pool
heaters, heavy demands are made on the controls. Special
steps may be required to prevent nuisance shutdowns and
control failure due to frequent cycling, severe environmental
conditions related to moisture, corrosive chemicals, dust or
excessive heat. These applications require Honeywell Home
and Building Control Engineering review; contact your
Honeywell Sales Representative for assistance.
Review the following conditions that could apply to your
specific installation and take the precautionary steps
suggested.

68-0135—2

S8610U UNIVERSAL INTERMITTENT PILOT MODULE
Table 4. S8610U Replaces these Ignition Modules.
CAMSTAT
IPI-24-00
FENWAL
05-203025-005
05-203026-005
HONEYWELL
S86A1001
S86A1019
S86A1027
S86A1035
S86B1009
S86B1017
S86B1025
S86C1007
S86C1015
S86C1031
S86C1049
S86C1056
S86D1005
S86D1021
S86E1002
S86E1010
S86E1028
S86E1036
S86E1044
S86E1051
S86E1069
S86E1077
S86E1101
S86E1119
S86E1127
S86F1000
S86F1018
S86F1026
S86F1042
S86F1059
S86F1067
S86F1075
S86F1083
S86F1091
S86G1008
S86G1016
S86G1032
S86G1057
S86G1073
S86H1006
S86H1022
S86H1048

S86H1089
S86H1097
S86H1105
S86H1121
S86H1147
S90A100
S90B1003
S90B1011
S8600A1001
S8600B1009
S8600C1015
S8600F1000
S8600F1034
S8600F1042
S8600H1006
S8600H1022
S8600H1048
S8600H1055
S8600H1089
S8600H1105
S8600M1005
S8600M1013
S8610A1009
S8610B1007
S8610B1015
S8610C1005
S8610F1008
S8610F1016
S8610F1024
S8610F1032
S8610H1012
S8610H1038
S8610H1046
S8610H1053
S8610H1079
S8610M1003
S8610M1029
S8620H1028
HSC
1003-3
1003-300
PENNJOHNSON
CSA35A-617R
CSA35A-618R
CSA42A-600R
CSA42A-601R
CSA42A-603R

G60PAG-6
G60PAJ-1
G60PAK-1
G60PAK-2
G60PFH-1
G60PFH-2
G60PFL-1
G60PFQ-1
G60PVL-1
G60QAG-2
G60QAG-3
G60QAK-1
G60QBG-1
G60QBG-2
G60QBG-3
G60QBG-4
G60QBG-5
G60QBG-6
G60QBG-7
G60QBG-8
G60QBG-9
G60QBH-1
G60QBK-1
G60QBK-3
G60QBL-1
G60QBL-2
G60QCG-1
G60QCJ-1
G60QCL-1
G60QDG-1
G60QFL-1
G60QHL-1
G60QJL-1
G60QLG-1
G60QPL-1
G60QRH-1
G60QRL-1
G60QRL-2
G60QRL-3
G60QSL-1
G60QTH-1
G60QTL-1
G60RAG-1
G60RAK-1
G60RBG-1
G60RBG-2
G60RBG-3
G60RBK-1
G60RBK-2

CSA42A-604R
CSA43A-600R
CSA44A-600R
CSA45A-601R
CSA45A-602R
CSA46A-600R
CSA48A-600R
CSA49A-600R
CSA49A-605R
CSA51A-601R
CSA52A-600R
G60AAA-1
G60AAG-1
G60AAG-3
G60AAG-4
G60AAG-5
G60AAG-6
G60CAA-1
G60CAA-3
G60CAG-1
G60CAG-2
G60CAG-3
G60CAG-4
G60CAG-5
G60CAG-6
G60CAG-7
G60CAG-8
G60CAG-9
G60CBA-1
G60CBA-3
G60CBG-1
G60CBG-10
G60CBG-11
G60CBG-14
G60CBG-16
G60CBG-17
G60CBG-3
G60CBG-4
G60CBG-9
G60CCA-1
G60CCG-1
G60CPG-1
G60DBG-1
G60DCG-1
G60DCG-2
G60PAG-1
G60PAG-2
G60PAG-3
G60PAG-4
G60PAG-5

G60RCG-2
G60RCJ-1
G60RDG-1
G60RDK-1
G60RGL-1
G60RHL-1
G60RHP-1
G60RPL-1
G60RSL-1
G60ZAG-1
G65BBG-1
G65BBG-2
G65BBG-3
G65BBG-4
G65BBG-5
G65BBG-6
G65BBG-7
G65BBG-8
G65BBM-1
G65BBM-2
G65BBM-3
G65BBM-4
G65BCG-1
G65BCM-1
G65BFG-1
G65BFM
G65BKG-1
G65BKG-2
G65BKG-3
G65BKM-1
G65BKM-2
G65BKM-3
G65DBG
G65DBM-1
G65DBM-3
G65DCM-1
G65DFG
G65DFM-1
G65DKG
G65DKM
G65FBG
G65FFG
G65FKG
G66AG-1
G66BG-1
G66MG-1
G66NG-1
G67AG-3
G67AG-4

G67AG-7
G67AG-8
G67BG-2
G67BG-3
G67BG-4
G67BG-5
G67MG-1
G67MG-4
G67NG-2
G600AX-1
G600AY-1
G600MX-1
G600NX-1
G600RX-1
G670AW-1
G770MGA-1
G770MGA-2
G770MGC-1
G770MGC-2
G770MGC-3
G770MHA-1
G770NGA-1
G770NGC-4
G770NGC-5
G770NGC-6
G770NGC-7
G770RGA-1
G770RHA-1
G770MHA-2
G770MHC-1
G770NHA-1
G770NHC-1
G770RHA-2

ROBERTSHAW
780-715
780-735
780-737
SP715
SP715A
SP735
SP735D
SP735L
USI 715U

68-0135—2

S8610U UNIVERSAL INTERMITTENT PILOT MODULE

INSTALLATION

Mount New Ignition Module
We recommend mounting the S8610U Module in the same
location as the old module, if possible. Otherwise, select a
location close enough to the burner to allow a short (3 ft
(0.9m) maximum) direct cable route to the igniter. Ambient
temperature at the module must be within the range listed in
the Specifications section.

1. Read these instructions carefully. Failure to follow them
could damage the components or cause a hazardous
condition.
2. Check the ratings given in the instructions and on the
components to make sure they are suitable for your
application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out component
operation as provided in these instructions.

Mount the module with the terminals pointing down to protect
them from dripping water and dust. The module can also be
mounted with the terminals on either side. Do not mount with
terminals pointing up. Refer to Fig. 2 for mounting
recommendations. When it is necessary to drill new mounting
holes, use the S8610U as a template to mark the mounting
hole pattern. Drill new holes as required. Fasten securely with
four no. 6-32 machine or no. 8 sheetmetal screws.

WARNING
FIRE OR EXPLOSION HAZARD CAN CAUSE
PROPERTY DAMAGE, SEVERE INJURY, OR
DEATH.
1. If it gets wet, the ignition module can malfunction,
leading to accumulation of explosive gas.
• Never install where water can flood, drip or
condense on the module.
• Never use a module that has been wet.
Replace it.
2. Liquefied petroleum (LP) gas is heavier than air
and will not vent upward naturally.
• Do not light the pilot or operate electric
switches, lights or appliances until you are
sure the appliance area is free of gas.
3. Do not attempt to disassemble or clean the
module. Improper reassembly and cleaning can
cause unreliable operation.

Wire the Module

CAUTION
1. Check the wiring diagram furnished by the
appliance manufacturer, if available, and
compare with Tables 5 through 8. Carefully follow
any special instructions affecting the general
procedures outlined below.
2. Disconnect the power supply before making
wiring connections to prevent electrical shock or
equipment damage.

IMPORTANT
1. A common ground is required on:
a. The pilot burner mounting bracket, and
b. The GND (BURNER) terminal on the ignition
module. Failure to use the GND (BURNER)
terminal can result in intermittent loss of spark
and/or loss of flame current sensitivity.
2. Make sure the transformer has adequate VA. The
ignition module requires at least 0.2A at 24 Vac. Add
the current draws of all other devices in the control
circuit, including the pilot and main valves in the gas
control, and multiply by 24 to determine the total VA
requirement of these components. Add this total to
4.8 VA (for the ignition module). The result is the
minimum transformer VA rating. Use a Class II
transformer when replacement is required.
3. When a vent damper is connected to the S8610U
vent damper connector, be sure the system
transformer delivers at least 30 VA. The S8610U has
an internal fuse that is intended to prevent appliance
lightoff if the vent damper is not in place or wired
properly. Using a small transformer can interfere with
the proper operation of the fuse and bypass the
intended safety feature.

CAUTION
1. Disconnect the power supply before beginning
the wiring to prevent electrical shock or
equipment damage.
2. If a new gas control is to be installed, turn off the
gas supply before starting the installation.
Conduct a Gas Leak Test according to the gas
control manufacturer instructions after the gas
control is installed.
3. If the module must be mounted near moisture or
water, provide a suitable waterproof enclosure.
4. Using the wire labels provided, label all wires
before they are disconnected. Wiring errors can
cause improper appliance operation and
dangerous conditions such as bypassing safety
features.

Perform Preinstallation Safety Inspection
The preinstallation checks described in ANSI Standard
Z21.71 in Exhibit A must be done before the replacement
module is installed. If a condition is detected that could result
in unsafe operation, the appliance should be shut off and the
owner advised of the unsafe condition. Correct any potentially
unsafe condition before proceeding with the installation.

쐃 Connect the wires to the S8610U Ignition Module as
shown in Tables 5 through 8. Make sure that adequate
system ground is provided as indicated in the wiring
tables.
쐇 Verify the thermostat anticipator setting as explained in
the IMPORTANT above.

Remove Old Module
Disconnect power supply before doing any work on the unit.
Disconnect and tag the wires from the old module using the
wire labels provided. Remove the old module from its
mounting location.

68-0135—2

S8610U UNIVERSAL INTERMITTENT PILOT MODULE
NOTE: The wiring diagrams in Fig. 5 through 8 show typical
hookups for the S8610U Ignition Module and should
be used for reference only.

MOUNT IN ONE OF THESE POSITIONS

Modify Ignition Cable, If Necessary
Use existing ignition cable if it is in good condition. If the
existing ignition cable does not have a 1/4 in. quick-connect
on the module end, either use the Rajah adapter or strip the
wire and replace with the 1/4 in. insulated quick-connect
supplied. If the cable must be replaced, order a Honeywell
ignition cable, see Table 2. It may be necessary to replace the
connector at the pilot burner end to match the pilot burner
spark termination.

TERMINALS FACING DOWN

NOTE: When using an S8610U to replace an S86, use the
enclosed adapter to convert the S86 Ignition Cable
to an S8610U Ignition Cable. Then, install the
adapter and cable to the S8610U Ignition Module.
NOTE: The cable must not run in continuous contact with a
metal surface or spark voltage is greatly reduced.
Use ceramic or plastic standoff insulators as
required.

TERMINALS FACING LEFT

TERMINALS FACING RIGHT

DO NOT MOUNT
WITH TERMINALS FACING UP

M2647

Fig. 2. Module mounting recommendations.

68-0135—2

8
f

TH-Ra

TH-W
d

IGN COIL c

TH-Wb
d

IGN COIL c

25V

25V (GND)

GND

MV/PV

S86B,D

TH-Ra

25V (2)

25V (1)

GND

MV/PV

S86A,C

24V*

25V (2) e*
24V*

24V GND

GND
(BURNER)

MV/PV

S8600F,H,M
S8610F,H,M

IGN COIL c

TH-Wb

TH-Ra

SPARK

SENSE f

TH-W
(This terminal
not included
on S90.)

SPARK

TH-W

25V (2) or 24V used only in systems where
plug-in cable connects damper to module.

24V GND

GND
(BURNER)

MV/PV

S8600A,B,C
S8610A,B,C
S90A,B

25V (1)e

GND
(BURNER)

MV/PV

S86E,F,G,H

Old Control

If the old module had a vent damper with a plug
connection to a Molex connector, wire the
terminals as indicated in the table.

* Important: If the old module had a vent damper
plug but a vent damper was not installed, or if it
did not have a vent damper plug: leave the vent
damper plug in position on the S8610 and
connect the 25V (2) or 24V wire from the old
module to the TH-W terminal on the S8610U.
Do not use the 24V terminal on the S8610U.

Procedural Notes

If 25V (2) and TH-R have wires connected, disconnect and splice together with solderless connector.
If TH-R and TH-W are jumpered together, connect 25V (2) lead from S86 to TH-W on S8610U1003.
Use Rajah to quick connector adapter (supplied) or cut Rajah connector off ignition cable at module end; attach insulated quick connect for connection to S8610.
Leave black jumper connected.
Terminals may be marked 25V on some models and 24V on later models. These are functionally equivalent.
On dual igniter and sensor models, remove jumper quick connect from S8610U1003 Sense terminal, cut jumper wire at circuit board, and discard.

SPARK

Igniter/sensor

a
b
c
d
e
f

SENSE

TH-W

24V*

Flame sensor

Transformer
secondary
(switched leg)

24V GND

Pilot valve operator

Transformer
secondary
(unswitched leg)

MV/PV

Main valve and pilot
common

GND
(BURNER)

Main valve operator

Burner ground
connection

S8610U1003

Terminal Function

Replacement
Control

Table 5. Conversion from Honeywell S86, S90, S8600 and S8610 to S8610U1003.

S8610U UNIVERSAL INTERMITTENT PILOT MODULE

TH-W

Transfomer secondary

IGN

SENSE e
IGN

SENSE e

E3a

E3a
TH

No connection

GND

PV (to: Valve P)

MV/PV (to: Valve C)

IGN

SENSE e

E3a

No connection

GND

PV (to: Valve PICK & HOLD)

PV (to: Valve C and TH)

Procedural Notes

—

If LO-15 is part of the installation,
use the wire disconnected from E1
tagged Thermostat.

When supplied, E3 provides
connection to Lockout Timer.

—

*This is the terminal not jumpered
to TR.

—

For replacement of Robertshaw Flame Switch systems (SP710, 720, 730, 750, 780-700, 780-701, 780-710, 780-711, 780-712 and 780-713), see Honeywell Ignition
Control Handbook.
d 780-715 and USI 715U are equivalent to SP715; 780-735 and 780-737 are equivalent to SP735. For other 780-XXX models, see notec .
e OPT. SENSOR on USI 715U. No external connection if combination igniter sensor is used.

7100K Valve
MV (to: Valve TR)

If the USI 715U with combination igniter sensor is not used, remove black jumper quick connect from Sense terminal of S8610U1003. Cut jumper wire at
circuit board and discard.

b Important

a If LO-15 Lockout timer is not installed, E3 connector provided on SP715 is not used.

7100D Valve
MV (to: Valve M)

No connection

GND

PV (to: Valve PILOT)*

MV/PV (to: Valve TR)

MV (to: Valve TH)

7000D Valve

Old Control SP715 and SP735 (includes 780-XXX and USI 715U)c,d

Use existing wiring harness to make connections to S8610 per table. IMPORTANT If installation includes LO-15 Lockout Timer, discard wires to E3 and TH.
Disconnect and retain wire to LO-15 terminal E1. Tag wire,Thermostat. Discard LO-15.
On 7000D series valve, retain (or install) white jumper between valve TR and pilot solenoid.

SPARK

Pilot igniter

SENSE b

Flame sensor

(switched leg)

24V

24V GND

GND (BURNER)

MV/PV

Honeywell
S8610U1003

(unswitched leg)

Transformer secondary

Burner ground connection

Pilot valve operator

Main valve and pilot common

Main valve operator

Terminal Function

Replacement
Control

Table 6. Conversion from Robertshaw SP715 and SP735 to S8610U1003 (includes 780-XXX and US1715U).

S8610U UNIVERSAL INTERMITTENT PILOT MODULE

68-0135—2

SPARK

IGN COIL
IGN COIL

No connection*
4e

Y79 THSb

Y79A moduled

IGN COIL

No connection*
4e

Y79B PV

Y79B MV

Y79B modulec

IGN COIL

No connection*
SENSE (4)e

TH-S (2)

GROUND

PV (1)

GROUND(5)

MV (3)

G770

*IF INSTALLATION DOES NOT INCLUDE VENT DAMPER WITH PLUG CONNECTION TO MODULE:
1. Leave vent damper plug on S8610U Module in position.
2. Use TH-W terminal.
*IF INSTALLATION INCLUDES VENT DAMPER WITH PLUG CONNECTION TO MODULE:
1. Replace S8610U Module vent damper plug with damper Molex connector.
2. Wire thermostat W wire to TH-W.
3. Run wire from switched leg of transformer secondary to both thermostat R and S8610 Module 24V terminals.

Procedural Notes

It might be necessary to cut off Rajah
connector and/or attach insulated quick
connect.

Discard wire between transformer and terminal 5 (G60) or 6 (G600); otherwise, use existing harness for wiring.
Discard wires between Y79A and module as follows: Red to 3, Black to 2, White to GR. Discard wire between transformer and 6.
Discard wires between Y79B and module as follows: White to 3, Black to 1, Brown to GR. Discard wire between transformer and 6.
CSA code numbers (for example, CSA45A-600R) are equivalent to G600 and use the same wiring information tables.
e Important
Remove black jumper quick connect from Sense terminal of S8610U1003; cut jumper wire at circuit board and discard.

a
b
c
d

SENSE*

No connection*
4e

24V*

Flame sensor

TH-W*

Transformer secondary
(switched leg)

24V GND

Transformer secondary
(unswitched leg)

1
GR

GND
(BURNER)

3
GR

MV
MV/PV

None (Y79)

Honeywell
S861U1003

Pilot igniter

Old Control
CSA45A-600Rd, G60, G65, G66, G67, G600 or
G670 Installation with Lockout Modules as
follows:*

Burner ground connection

Pilot valve operator

Main valve and pilot common

Main valve operator

Terminal Function

Replacement
Control

Table 7. Conversion from Penn-Johnson CSA (All), G60, G66, G67, G600, G670 or G770 to S8610U1003.

S8610U UNIVERSAL INTERMITTENT PILOT MODULE

SPARK

Pilot igniter
IGN
H.V.

—

Sc
IGN COIL

SENSORc

24 VAC

No connection

GND/COM

—

GND/COM

HSC 1003-3 and
1003-300a

Strip module end of ignition cable as necessary
and attach insulated quick connect for connection
to S8610.

—

To assure good ground, run separate wire from
pilot burner to S8610 GND (BURNER).

—

Fenwal only: run separate lead to S8610 valve
common terminal.

—

Procedural Notes

Remove black jumper quick connect from Sense terminal of S8610U1003; cut jumper wire at circuit board and discard.

c Important

a Use existing wiring harness to make connections to S8610.
b Tag all wires at module connector with terminal designations. Cut wires at connector, attach quick connects and connect to S8610; per table.

SENSE

Flame sensor

POWER

No connection

GROUND

—

PILOT VALVE

GROUND

MAIN VALVE

No connection

24V
TH-W

GND

24V GND

GND (BURNER)

MV/PV

FENWAL
05-20Xb

CAMSTAT
IPI-24-00a

Honeywell
S8610U1003

Transformer secondary
(switched leg)

Transformer secondary
(unswitched leg)

Burner ground connection

Pilot valve operator

Main valve and pilot common

Main valve operator

Terminal Function

Old Control

Replacement
Control

Table 8. Conversion from CAMSTAT, FENWAL or HSC to S8610U1003.

S8610U UNIVERSAL INTERMITTENT PILOT MODULE

68-0135—2

S8610U UNIVERSAL INTERMITTENT PILOT MODULE

S8610U
5
MV MV/PV PV

GND
(BURNER)

24V
GND

24V TH-W

VENT
DAMPER
PLUG

COM

SPARK

PILOT

SENSE

WIRING
HARNESS

MAIN
VALVE

1ST
2ND
OPERATOR OPERATOR

THERMOSTAT
2

DUAL VALVE COMBINATION
GAS CONTROL

LIMIT
CONTROLLER 1

SENSOR

D892 VENT
DAMPER

L1
(HOT)

4
L2
GROUND

IGNITER

PILOT GAS
SUPPLY

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

ALTERNATE LIMIT CONTROLLER LOCATION.

MAXIMUM CABLE LENGTH 3 ft (0.9m).

CONTROLS IN 24V CIRCUIT MUST NOT BE GROUND LEG TO TRANSFORMER.

REMOVE PLUG ONLY IF USING VENT DAMPER. FUSE BLOWS ON STARTUP WHEN PLUG IS
REMOVED AND VENT DAMPER WIRING HARNESS IS INSTALLED; THEN MODULE OPERATES
ONLY WHEN VENT DAMPER IS CONNECTED.

REMOVE JUMPER AND CONNECT SENSE TERMINAL ON TWO ROD APPLICATION ONLY.

IF THE VENT DAMPER IS CONNECTED, WIRE 24V TERMINAL, AS SHOWN. CONNECT VENT
DAMPER CABLE IN PLACE OF PLUG SHIPPED WITH THE S8610U. IF NO VENT DAMPER IS
CONNECTED, DO NOT WIRE 24V TERMINAL.

30 VA MINIMUM WHEN VENT DAMPER IS CONNECTED TO DAMPER PLUG.

Fig. 3. S8610U in heating system with atmospheric burner.

68-0135—2

M2641D

S8610U UNIVERSAL INTERMITTENT PILOT MODULE

S8610U
5
MV MV/PV PV

PILOT

GND
(BURNER)

24V
GND

VENT
DAMPER
PLUG

1ST
2ND
OPERATOR OPERATOR

SENSE

SPARK

AIR
PROVING
SWITCH

MAIN
VALVE

COM

24V TH-W

THERMOSTAT

DUAL VALVE COMBINATION
GAS CONTROL
COMBUSTION
AIR BLOWER
RELAY

SENSOR

LIMIT
CONTROLLER

1
IGNITER

PILOT
BURNER
GROUND
PILOT GAS
SUPPLY

L1 L2 COMBUSTION
(HOT) AIR BLOWER
MOTOR
1 L2 L1
(HOT)
CONTROLLER

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

ALTERNATE LIMIT CONTROLLER LOCATION.

MAXIMUM CABLE LENGTH 3 ft (0.9m).

CONTROLS IN 24V CIRCUIT MUST NOT BE GROUND LEG TO TRANSFORMER.

LEAVE VENT DAMPER PLUG CONNECTED.

REMOVE JUMPER AND CONNECT SENSE TERMINAL ON TWO ROD APPLICATION ONLY.

M2642B

Fig. 4. S8610U in heating system with power-assisted combustion.

68-0135—2

S8610U UNIVERSAL INTERMITTENT PILOT MODULE

S8610U

COMPRESSOR
AND OUTDOOR
FAN NETWORK
L2 (N) TO 120 OR
240 VAC
POWER
L1 (N) SUPPLY

L2
FUSE
L1
STARTING
CAP

GND
24V
MV MV/PV PV (BURNER) GND 24V TH-W

VENT
DAMPER
PLUG
SENSE

C
1

CIRCULATING
FAN
LO
ML
MH
HI

120 OR
240 VAC

COMBUSTION
BLOWER

TRANSFORMER
24 VAC
Q345, Q348,
Q362, Q381
PILOT BURNER/
IGNITER-SENSOR

PV
MV/PV
M1

UNUSED
MOTOR LEDS
H
E
M3
A
T

C C
1 2

C
O
O
L

MVC

3 4 5
X

1 2 3 4

COMBINATION
GAS CONTROL

CR
PILOT
BURNER
GROUND

ST9120
ELECTRONIC
FAN TIMER

PILOT GAS
SUPPLY

ROLLOUT
FUSE

LIMIT
COM.

5-WIRE
CABLE

COMPRESSOR
CONTACTOR

AUXILIARY
LIMIT

R
= STANDARD TERMINAL

THERMOSTAT

N.O.
PRESSURE
SWITCH

= OPTIONAL TERMINAL

R
1

REMOVE JUMPER AND CONNECT SENSE TERMINAL
ON TWO ROD APPLICATION ONLY.
M2644B

Fig. 5. S8610U in a typical ST9120 application.

68-0135—2

SPARK

S8610U UNIVERSAL INTERMITTENT PILOT MODULE

STARTUP AND CHECKOUT

Step 3: Review normal operating sequence and module
specifications.
a. See Operation and Specifications sections.

Check out the gas control system:
• At initial appliance installation.
• As part of regular maintenance procedures.
• At maintenance intervals determined by the application.
• As the first step in troubleshooting.
• Any time work is done on the system.

Step 4: Reset the module.
a. Turn the thermostat to its lowest setting.
b. Wait one minute.

As you do Steps 5 and 6, watch for points where operation
deviates from normal. Refer to Troubleshooting Guide, Fig. 8,
to correct the problem.

Maintenance frequency must be determined individually for
each application. See Maintenance section.

WARNING

Step 5: Check safety shutoff operation.
a. Turn off the gas supply.
b. Set thermostat or controller above the room temperature
to call for heat.
c. Watch for spark at pilot burner.
d. Time spark from start to shutoff. Spark should shut off
after 90 seconds maximum. Ignition sequence repeats
after five minutes minimum.
e. Open the manual gas control knob and make sure no
gas is flowing to the pilot or main burner.
f. Set the thermostat below the room temperature and wait
one minute before continuing.

FIRE OR EXPLOSION HAZARD
CAN CAUSE PROPERTY DAMAGE, SEVERE
INJURY, OR DEATH.
1. If you smell gas or suspect a gas leak, turn off the
gas at the 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 steps
1 and 6 below on initial installation and anytime
work is done involving the gas piping.

Step 6: Check normal operation.
a. Set the thermostat or controller above the room
temperature to call for heat.
b. Make sure the pilot lights smoothly when the gas
reaches the pilot burner.
c. Make sure the main burner lights smoothly without
flashback.
d. Make sure the burner operates smoothly without floating,
lifting, or flame rollout to the furnace vestibule or heat
buildup in the vestibule.
e. If the gas line was disturbed, complete the gas leak test.

Step 1: Perform visual inspection.
a. With power off, make sure all wiring connections are
clean and tight.
b. Turn on the power to the appliance.
c. Open the manual shutoff valves in the gas line to the
appliance.
d. Test for gas leak before gas control if piping has been
disturbed.
Gas Leak Test:
Paint the gas control gasket edges and all pipe connections
downstream of the gas control, including pilot tubing
connections, with a rich soap and water solution. Bubbles
indicate gas leaks. Tighten the joints and screws or replace
the component to stop the gas leak. Recheck with soap and
water solution.

Gas Leak Test:
Paint the gas control gasket edges and all the pipe
connections downstream of the gas control, including pilot
tubing connections, with a rich soap and water solution.
Bubbles indicate gas leaks. Tighten the joints and screws or
replace the component to stop the gas leak. Recheck with
soap and water solution.

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 105°C (221°F) for the
ground wire; asbestos insulation is not acceptable. If the
temperature at the wire could exceed 105°C (221°F), use a
shield to protect the wire from radiant heat generated by the
burner. Connect the ground wire as follows:
a. Fit one end of the ground wire with a female 1/4 in.
quick-connect terminal and connect it to the male quickconnect GND (BURNER) terminal on the ignition module.
b. Strip the other end of the wire and fasten it under the
igniter bracket mounting screw. If necessary, use a shield
to protect the ground wire from radiant heat.
c. The burner serves as the common grounding area. If
there is not good metal-to-metal contact between the
burner and ground, run a lead from the burner to ground.

Turn the thermostat or controller below the room
temperature. Make sure the main burner and pilot flames
go out.

MAINTENANCE

WARNING
FIRE OR EXPLOSION HAZARD CAN CAUSE
PROPERTY DAMAGE, SEVERE INJURY, OR
DEATH.
Do not attempt to take the module apart or to clean it.
Improper assembly and cleaning can cause unreliable
operation.

NOTE: Earth ground is not required.

68-0135—2

S8610U UNIVERSAL INTERMITTENT PILOT MODULE
• 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 environment. Because these
environments can cause the gas control to deteriorate
more rapidly, the system should be checked more often.

Regular preventive maintenance is important in commercial
cooking, agricultural and industrial industries applications 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. A
NEMA 4 enclosure can reduce exposure to environmental
contaminants. See Electronic Ignition Service Manual,
form 70-6604.

Any control should be replaced if it does not perform properly
on checkout or troubleshooting. In addition, replace any
module if it is wet or looks like it has ever been wet.
Protective enclosures as described in the Planning the
Installation section are recommended, regardless of checkout
frequency.

The maintenance program should include regular system
checkout as outlined in the Startup and Checkout section,
and control system checkout as described in appliance
manufacturer literature.

OPERATION
Module operation can be conveniently divided into two
phases for the S8610:
• Trial for ignition.
• Main burner operation.

Maintenance frequency must be determined individually for
each application. Some considerations are:
• Cycling frequency. Appliances that can 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.

START

쐃

STAGE 1

쐇

TRIAL FOR
IGNITION

THERMOSTAT (CONTROLLER)
CALL FOR HEAT

SPARK GENERATOR POWERED
First valve (pilot) operator opens

쐋

PILOT BURNER OPERATION
Pilot burner lights.
Module senses
flame current.

STAGE 2

쐏

MAIN BURNER
OPERATION

쐄

쐂
END

Fig. 6 summarizes the normal operating sequence of the
module.

After 90 seconds maximum, system shuts off; trial for
ignition restarts after minimum of 5 minutes (6 minutes
nominal). Ignition, shutoff, wait sequence repeats until
pilot lights or call for heat ends.

FLAME CURRENT SENSED
• Spark generator off.
• Second valve operator
(main) opens.

MAIN BURNER OPERATION
Module monitors pilot
flame current.

POWER INTERRUPTION
System shuts off, restarts when power
is restored.
PILOT FLAME FAILURE
Main valve closes.
Module starts trial for ignition.

THERMOSTAT (CONTROLLER)
SATISFIED
Valves close, pilot and main
burners are off.

Fig. 6. S8610U normal operating sequence.

68-0135—2

M2640A

S8610U UNIVERSAL INTERMITTENT PILOT MODULE

TROUBLESHOOTING

Step 3: Check spark ignition circuit. You will need a short jumper wire
made from ignition cable or other heavily insulated wire.
a. Close the manual gas valve.
b. Disconnect the ignition cable at the SPARK terminal on
the module.

IMPORTANT
1. The following service procedures are provided as a
general guide. Follow appliance manufacturer
service instructions if available.
2. Meter readings between gas control and ignition
module must be taken within the trial for ignition
period. Once the ignition module shuts off, wait for
retry or reset at the thermostat.
3. If any component does not function properly, make
sure it is correctly installed and wired before
replacing it.
4. The ignition module cannot be repaired. If it
malfunctions, replace it.
5. Only trained, experienced service technicians should
service intermittent pilot systems.
6. After servicing, verify proper system operation.

WARNING
ELECTROCUTION HAZARD, CAN CAUSE
SERIOUS INJURY OR DEATH.
When performing the following steps, do not touch
stripped end of jumper or SPARK terminal. The
ignition circuit generates over 10,000 volts and
electrical shock can result.
c.

Perform the checkout steps in the Startup and Checkout
section as the first step in troubleshooting. Then check the
appropriate troubleshooting guide (Fig. 8) and the schematic
diagram (Fig. 9) to determine the cause of the problem. If
troubleshooting indicates an ignition problem, see Ignition
System Checks section to isolate and correct the problem.

Energize the module and immediately touch one end of
the jumper firmly to the GND terminal on the module.
Move the free end of the jumper slowly toward the
SPARK terminal until a spark is established.
Pull the jumper slowly away from the terminal and note
the length of the gap; when sparking stops, refer to the
table as follows:
Arc Length

After troubleshooting, perform the checkout procedures again
to be sure the system is operating normally.

Ignition System Checks
Step 1: Check ignition cable.
Make sure:
a. Ignition cable does not run in contact with any metal
surfaces.
b. Ignition cable is no more than 36 in. (0.9m) long.
c. Connections to the ignition module and to the igniter or
igniter-sensor are clean and tight.
d. Ignition cable provides good electrical continuity.

Action

No arc or arc less
than 1/8 in. (3 mm).

Check external fuse, if provided.
Verify power at module input
terminal. Replace module if fuse
and power are okay.

Arc 1/8 in. (3 mm) or
longer.

Voltage output is okay.

STEP 4: Check pilot and main burner lightoff.
a. Set the thermostat to call for heat.
b. Watch the pilot burner during the ignition sequence to be
sure:
• Ignition spark continues after the pilot is lit.
• The pilot lights and the spark stops, but the main
burner does not light.
• The pilot lights, the spark stops and the main burner
lights, but the system shuts down.
c. If so, verify adequate flame current as follows:
• Turn off the furnace at the circuit breaker or fuse box.
• Clean the flame rod with an emery cloth.
• Make sure the electrical connections are clean and
tight. Replace the damaged wire with moistureresistant No. 18 wire rated for continuous duty up to
105°C (221° F).
• Check for a cracked ceramic insulator, which can
cause short to ground, and replace igniter-sensor or
sensor, if necessary.
• At the gas control, disconnect the main valve wire
from the TH or MV terminal.
• Turn on the power and set the thermostat to call for
heat. The pilot should light but the main burner
remains off because the main valve actuator is
disconnected.
• Check the pilot flame. Make sure it is blue, steady,
and envelops 3/8 to 1/2 in. (10 to 13 mm) of the flame
rod. See Fig. 7 for possible flame problems and the
causes.

Step 2: Check ignition system grounding. Nuisance shutdowns are
often caused by a poor or erratic ground.
a. A common ground, usually supplied by the pilot burner
bracket, is required for the module and the pilot burner/
igniter-sensor.
• Check for good metal-to-metal contact between the
pilot burner bracket and the main burner.
• Check the ground lead from the GND (BURNER)
terminal on the module to the pilot burner. Make sure
connections are clean and tight. If the wire is
damaged or deteriorated, replace it with No. 14
through 18 gauge, moisture-resistant, thermoplastic
insulated wire with 105°C (221°F) minimum rating.
— Check the ceramic flame rod insulator for cracks
or evidence of exposure to extreme heat, which
can permit leakage to ground. Replace pilot
burner/igniter-sensor and provide a shield, if
necessary.
— If flame rod or bracket are bent out of position,
restore to the correct position.

68-0135—2

S8610U UNIVERSAL INTERMITTENT PILOT MODULE

• If necessary, adjust the pilot flame by turning the pilot
adjustment screw on the gas control clockwise to
decrease or counterclockwise to increase the pilot
flame. Following adjustment, always replace the pilot
adjustment cover screw and tighten firmly to assure
proper gas control operation.
• Set the thermostat below the room temperature to end
the call for heat.
Recheck ignition sequence as follows:
• Reconnect the main valve wire.
• Set the thermostat to call for heat.
• Watch the ignition sequence at the burner.
• If spark still does not stop after pilot lights, replace the
ignition module.
• If the main burner does not light or if the main burner
lights but system locks out, check module, ground
wire, and gas control, as described in the
Troubleshooting Guide, Fig. 8.

APPEARANCE
SMALL BLUE FLAME

CAUSE
CHECK FOR LACK OF GAS FROM:
• CLOGGED ORIFICE FILTER
• CLOGGED PILOT FILTER
• LOW GAS SUPPLY PRESSURE
• PILOT ADJUSTMENT AT MINIMUM

LAZY YELLOW FLAME

CHECK FOR LACK OF AIR FROM:
• DIRTY ORIFICE
• DIRTY LINT SCREEN, IF USED
• DIRTY PRIMARY AIR OPENING,
IF THERE IS ONE
• PILOT ADJUSTMENT AT MINIMUM

WAVING BLUE FLAME

CHECK FOR:
• EXCESSIVE DRAFT AT PILOT
LOCATION
• RECIRCULATING PRODUCTS
OF COMBUSTION

NOISY LIFTING BLOWING FLAME

CHECK FOR:
• HIGH GAS PRESSURE

HARD SHARP FLAME

THIS FLAME IS CHARACTERISTIC
OF MANUFACTURED GAS
CHECK FOR:
• HIGH GAS PRESSURE
• ORIFICE TOO SMALL

M2233A

Fig. 7. Examples of unsatisfactory pilot flames.

68-0135—2

S8610U UNIVERSAL INTERMITTENT PILOT MODULE

START
TURN OFF GAS SUPPLY.
TURN THERMOSTAT
(CONTROLLER) TO CALL
FOR HEAT.

NOTE: Before troubleshooting, familiarize yourself with the startup and checkout procedure.

POWER TO MODULE.
(24V NOMINAL)
CHECK AT TH-W TERMINAL,
AND ALSO AT 24V TERMINAL
IF A VENT DAMPER IS
CONNECTED TO THE
DAMPER CONNECTOR.

Check line voltage power, low voltage transformer, limit controller, thermostat (controller) and wiring. Also,
check air proving switch on combustion air blower system (if used) and verify that vent damper (if used) is open
and end switch is made.

YES
SPARK ACROSS
IGNITER/SENSOR GAP?

Pull ignition lead and
check spark at module.

• On models with vent damper plug, make sure vent damper
was not installed, then removed. Replace vent damper,
if necessary.
• On other models, replace module.

Spark okay?
YES
YES

• Check ignition cable, ground wiring, ceramic insulator and gap, and correct.
• Check boot of the ignition cable for signs of melting or buckling. Replace cable and take protective action
to shield cable and boot from excessive temperatures.

TURN ON GAS SUPPLY.
NO
PILOT BURNER LIGHTS?
YES

SPARK STOPS WHEN
PILOT IS LIT?

YES

MAIN BURNER LIGHTS?

• Check that all manual gas valves are open, supply tubing and pressures are good, and pilot burner orifice
is not blocked.
• Check electrical connections between module and pilot operator on gas control.
• Check for 24 Vac across PV-MV/PV terminals on module. If voltage is okay, replace gas control; if not,
replace module

•
•
•
•
•
•
•

Check continuity of ignition cable and ground wire.
Clean flame rod.
Check electrical connections between flame rod and module.
Check for cracked ceramic flame rod insulator.
Check that pilot flame covers flame rod and is steady and blue.
Adjust pilot flame.
If problem persists, replace module.

• Check for 24 Vac across MV-MV/PV terminals. If no voltage, replace module.
• Check electrical connections between module and gas control. If okay, replace gas control or gas
control operator.

YES

SYSTEM RUNS UNTIL
CALL FOR HEAT ENDS?

YES

CALL FOR HEAT ENDS.
SYSTEM SHUTS OFF?

• Check continuity of ignition cable and ground wire.
NOTE: If ground is poor or erratic, shutdowns can occur occasionally even though operation is normal
at the time of checkout.
• Check temperature at igniter-sensor insulator. High temperatures can cause a short.
• Check that pilot flame covers flame rod and is steady and blue.
• If checks are okay, replace module.

• Check for proper thermostat (controller) operation.
• Remove MV lead at module; if valve closes, recheck temperature controller and wiring; if not, replace
gas control.

YES

TROUBLESHOOTING
ENDS.

Repeat procedure until troublefree operation is obtained.
M2643B

Fig. 8. S8610U Troubleshooting Guide.

68-0135—2

S8610U UNIVERSAL INTERMITTENT PILOT MODULE

L1
(HOT)

THERMOSTAT

LIMIT
CONTROLLER

ON-OFF
SWITCH

2
24V
TRANSFORMER

TH-W

24V
(GND)

24V

ARC
GAP

FUSE
2K1

SPARK
DRIVE
CIRCUIT

SENSOR
SENSE

4
4

FLAME
DETECTOR
CIRCUIT
1

VENT
DAMPER
PLUG

IGNITER
5

RELAY
DRIVERS

TIMING
CIRCUITS

BURNER
GROUND

YELLOW
1K2

1K1

GND
(BURNER)

HYBRID CIRCUITS

1K
LOW
VOLTAGE
POWER
SUPPLY

SPARK

MAIN
VALVE

3K2

MV/
PV

MV
2K2

PILOT
VALVE

3K1
PV

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

ALTERNATE LIMIT CONTROLLER LOCATION.

3 AMP NONREPLACEABLE FUSE. FUSE BLOWS WHEN VENT DAMPER IS PLUGGED IN AND POWER IS APPLIED.

SEPARATE SENSOR IS USED ON TWO-ROD SYSTEMS ONLY. DISCONNECT BLACK JUMPER WIRE FROM SENSE
TERMINAL, CUT AT CIRCUIT BOARD AND DISCARD.

SINGLE ROD SYSTEM HAS IGNITER–SENSOR.

INTERNAL WIRING
EXTERNAL WIRING

M2646B

Fig. 9. Schematic for S8610U.

68-0135—2

S8610U UNIVERSAL INTERMITTENT PILOT MODULE

ANSI STANDARDS
Exhibit A
Recommended Procedure For Safety Inspection Of An Existing Appliance Installation As A
Preliminary Step To Applying An Automatic Intermittent Pilot System
쐊 Place in operation the appliance being inspected.
Follow the lighting instructions. Adjust thermostat so
appliance will operate continuously.
쐎 a. Determine that the pilot is burning properly and
that main burner ignition is satisfactory by
interrupting and re-establishing the electrical
supply to the appliance in any convenient manner.
쐅 Determine manifold pressure in order to match input
after the new control is installed.
쐈 a. Visually determine that main burner gas is burning
properly; i.e., no floating, lifting or flashback. Adjust
the primary air shutter(s) as required.
b. If appliance is equipped with high and low flame
control or flame modulation, check for proper main
burner operation at low flame.
쐉 Test for spillage at the draft hood relief opening after
five minutes of main burner operation. Use a draft
gauge, the flame of a match or candle, or smoke from a
cigarette, cigar or pipe.
씈 Return doors, windows, exhaust fans, fireplace
dampers and all other fuel-burning appliances to their
previous conditions of use.
씉 Applicable only to warm air heating appliances. Check
both limit controller and fan controller for proper
operation. Limit controller operation can be checked by
temporarily disconnecting the electrical supply to the
blower motor and determining that the limit control acts
to shut off the main burner gas.
씊 Applicable only to boilers:
a. Determine that the circulating water pumps are in
operating condition.
b. Test low water cutoffs, automatic feed controls,
pressure and temperature limit controls and relief
valves in accordance with the manufacturer’s recommendations and instructions to determine they
are in operating condition.

The following procedure is intended as a guide to aid in
determining that an appliance is properly installed and is in a
safe condition for continuing use.
This procedure is predicated on central furnace and boiler
installations equipped with an atmospheric gas burner(s) and
not of the direct vent type. It should be recognized that
generalized test procedures cannot anticipate all situations.
Accordingly, in some cases, deviation from this procedure
may be necessary to determine safe operation of the
equipment.
a. This procedure should be performed prior to any attempt
at modification of the appliance or the installation.
b. If it is determined there is a condition which could result
in unsafe operation, the appliance should be shut off and
the owner advised of the unsafe condition.
The following steps should be followed in making the safety
inspection:
쐃 Conduct a Gas Leakage Test of the appliance piping
and control system downstream of the shutoff valve in
the supply line to the appliance.
쐇 Visually inspect the venting system for proper size and
horizontal pitch and determine there is no blockage or
restrictions, leakage or corrosion or other deficiencies
that could cause an unsafe condition.
쐋 Shut off all gas to the appliance and shut off any other
fuel-burning appliance within the same room. Use the
shutoff valve in the shutoff valve in the supply line to
each appliance.
쐏 Inspect burners and crossovers for blockage and
corrosion.
쐄 Applicable only to warm air heating appliances. Inspect
heat exchangers for cracks, openings or excessive
corrosion.
쐂 Applicable only to boilers. Inspect for evidence of water
or combustion product leaks.
쐆 Insofar as is practical, close all building doors and
windows and all doors between the space in which the
appliance is located and other spaces of the building.
Turn on clothes dryers. Turn on any exhaust fans, such
as range hoods and bathroom exhausts, so they will
operate at maximum speed. Do not operate a summer
exhaust fan. Close fireplace dampers. If, after
completing steps 7 through 12, it is believed sufficient
combustion air is not available, refer to 1.3.4 of the
National Fuel Gas Code (Z223.1) for guidance.

Exhibit A Of ANSI Standard Z21.71 for Automatic Intermittent Pilot Ignition Systems for Field Installation.

68-0135—2

S8610U UNIVERSAL INTERMITTENT PILOT MODULE

Exhibit B
Procedure for Installing Automatic Intermittent Pilot Systems
쐆 Make certain wiring connections are tight and wires are
positioned and secured so they will not be able to
contact high temperature locations.
쐊 Conduct a Gas Leakage Test of the appliance piping
and control system downstream of the shutoff valve in
the supply line to the appliance.
쐎 a. Adjust the thermostat to its highest temperature
setting, and test manifold pressure and adjust the
pressure regulator to match original input as
required (refer to Exhibit A, step 9b).
b. Visually determine that main burner is burning
properly; i.e., no floating, lifting or flashback. Adjust
the primary air shutter(s) as required.
쐅 If the appliance is equipped with high and low flame
control or flame modulation, check for proper main
burner operation at both high and low flame.
쐈 Determine that the pilot is igniting and burning properly
and that main burner ignition is satisfactory by
interrupting and reestablishing the electrical supply to
the appliance in any convenient manner. Make this
determination with the appliance burner both cold and
hot. Perform this step as many times as is necessary to
satisfy yourself that the automatic intermittent pilot
system is operating properly.
쐉 Test the pilot safety device (1) to determine if it is
operating properly, and (2) for turndown characteristics
according to the manufacturer’s installation instructions.
No adjustments should be made other than those
recommended by the system manufacturer.
씈 Sequence the appliance through at least three
operating cycles.
씉 Applicable only to furnaces. Check both the limit
controller and the fan controller for proper operation.
Limit control operation can be checked by blocking the
circulating air inlet or temporarily disconnecting the
electrical supply to the blower motor and determining
that the limit controller acts to shut off the main burner
gas.
씊 Applicable only to boilers:
a. Determine that the circulating water pumps are in
operating condition.
b. Test low water cutoffs, automatic feed water
controls, pressure and temperature limit
controllers and relief valves in accordance with
the manufacturer’s recommendation to determine
they are in operating condition.

Prior to beginning this procedure, a preliminary examination
of the appliance and the automatic intermittent pilot system
should be made to determine that the automatic intermittent
pilot system can be properly applied to the appliance.
This procedure is intended as a guide to aid in safely
installing a listed automatic intermittent pilot system on an
existing listed appliance equipped with an atmospheric gas
burner(s) and not of the direct vent type.
This procedure is based on the assumption that the history of
the specific installation has been one of safe and satisfactory
operation.
This procedure is predicated on central furnace and boiler
installations, and it should be recognized that generalized
procedures cannot anticipate all situations. Accordingly, in
some cases, deviation from this procedure may be necessary
to determine safe operation of the equipment.
The following steps should be followed in making the
modifications:
쐃 Perform a safety inspection of the existing appliance
installation. See Exhibit A for a recommended
procedure for such a safety inspection.
쐇 Shut off all gas and electricity to the appliance. To shut
off gas, use the shutoff valve in the supply line to the
appliance. Do not use the shut-off valve which is
provided as part of a combination control.
쐋 Install the automatic intermittent pilot system in strict
accordance with the manufacturer’s installation
instructions.
쐏 Turn on all gas and electricity to the appliance.
쐄 Determine that the appliance transformer has adequate
capacity by following the steps outlined below:
a. Compute the approximate current draw by adding
the current draw of the automatic intermit-tent
pilot system to (1) the current draw of the
associated valving, and (2) the current draw of
any relays or other devices operated by the
transformer.
b. Multiply the total current draw as computed
above by 24V to determine the total volt-ampere
(VA) required.
c. The total VA required should be equal to or less
than the VA rating of the transformer.
d. If the total VA required is greater than the VA
rating of the transformer, the transformer must be
replaced with a Class 2 transformer of adequate
rating.
쐂 Check the heat anticipator in the comfort thermostat to
determine if it is properly adjusted to the current draw of
the control system. Follow the thermostat
manufacturer’s instructions.

씋 Add the labels (see 1.6.1-n and -o) on the appliance.

EXHIBIT B OF ANSI STANDARD Z21.71 FOR AUTOMATIC INTERMITTENT PILOT IGNITION SYSTEMS FOR
FIELD INSTALLATION.
68-0135—2

S8610U UNIVERSAL INTERMITTENT PILOT MODULE

68-0135—2

S8610U UNIVERSAL INTERMITTENT PILOT MODULE

Home and Building Control
Honeywell Inc.
Honeywell Plaza
P.O. Box 524
Minneapolis MN 55408-0524

Home and Building Control
Honeywell Limited-Honeywell Limitée
155 Gordon Baker Road
North York, Ontario
M2H 2C9

Honeywell Latin American Division
Miami Lakes Headquarters
14505 Commerce Way Suite 500
Miami Lakes FL 33016

Honeywell Europe S.A.
3 Avenue du Bourget
B-1140 Brussels Belgium

Honeywell Asia Pacific Inc.
Room 3213-3225
Sun Hung Kai Centre
No. 30 Harbour Road
Wanchai
Hong Kong

Helping You Control Your World
68-0135—2 J.S. Rev. 8-96 Printed in U.S.A.
68-0135—2

Printed on recycled paper containing at
least 10% post-consumer
paper fibers.
24

customer.honeywell.com

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68 0135 S8610U Universal Intermittent Pilot Module TRADELINE RA832A

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