furnace, for which the controls were originally in-
tended, typically operates less than 20,000 cycles
per year.
•
Exposure to water, dirt, chemicals, and heat can
damage the module or the gas control and shut down
the control system. A NEMA 4 enclosure can reduce
exposure to environmental contaminants. See Elec-
tronic Ignition Service Manual, form 70-6604.
The maintenance program should include regular check-
out of the system as outlined under Checkout, page 13.
WARNING
FIRE OR EXPLOSION HAZARD
MAY CAUSE PROPERTY DAMAGE, SEVERE
INJURY, OR DEATH
Do not attempt to disassemble or clean the mod-
ule. Improper reassembly and cleaning may cause
unreliable operation.
Maintenance frequency must be determined individually
for each application. Some considerations are:
•
Cycling frequency
. Appliances that may cycle more
than 20,000 times annually should be checked
monthly.
•
Intermittent use
. Appliances that are used seasonally
should be checked before shutdown and again be-
fore the next use.
•
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.
Since these
environments can cause the controls to deteriorate
more rapidly, the system should be checked more
often.
Any control should be replaced if it does not perform
properly on checkout or troubleshooting. In addition, re-
place any module if it is wet or looks like it has ever been
wet. Protective enclosures as outlined under “Planning the
Installation” are recommended regardless of checkout fre-
quency.
MOUNT IGNITION MODULE
Select a location close enough to the burner to allow a
short (3 ft. [0.9 m] max.), direct cable route to the igniter.
Ambient temperature at the module must be within the
range listed under APPLICATION, page 1. The module
must be protected from water, moisture, corrosive chemi-
cals, and excessive dust and grease.
We recommend mounting the module with the terminals
down to protect them from dripping water and dust. It can
also be mounted with the terminals on either side. DO NOT
MOUNT with terminals pointing up. Refer to Fig. 1 for
mounting recommendations. Fasten securely with four No.
6-32 machine or No. 8 sheetmetal screws (S8610 and
S8670 mounting hole pattern is the same as the S86 and
S89 mounting hole pattern).
INSTALLATION
WHEN INSTALLING THIS IGNITION SYSTEM…
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 appli-
cation.
3.
Installer must be a trained, experienced service tech-
nician.
4.
After installation is complete, check out component
operation as provided in these instructions.
WARNING
FIRE OR EXPLOSION HAZARD
MAY CAUSE PROPERTY DAMAGE, SEVERE
INJURY, OR DEATH
1.
The ignition module can malfunction if it gets
wet, leading to accumulation of explosive gas.
•
Never install where water can flood, drip, or
condense on module.
•
Never try to 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 pilot or operate electric
switches, lights, or appliances until you are
sure the appliance area is free of gas.
CAUTION
1.
Disconnect power supply before beginning wiring
to prevent electrical shock or equipment damage.
2.
If a new gas control is to be installed, turn off gas
supply before starting installation. Conduct Gas
Leak Test according to gas control manufac-
turer’s instructions after the gas control is in-
stalled.
3.
If module must be mounted near moisture or
water, provide suitable waterproof enclosure.
PERFORM PREINSTALLATION SAFETY INSPECTION
The preinstallation checks described in ANSI Standard
Z21.71 on page 21
must
be done before the replacement
module is installed. If a condition which could result in
unsafe operation is detected, the appliance should be shut
off and the owner advised of the unsafe condition. Any
potentially unsafe condition must be corrected before pro-
ceeding with the installation.
Maintenance Requirements in Severe Environments
Regular preventive maintenance is important in any
application, but especially so in commercial cooking,
agricultural, and industrial applications because:
•
In many such applications, particularly commercial
cooking, the equipment operates 100,000-200,000
cycles per year. Such heavy cycling can wear out the
gas control in one to two years. A normal forced air
HEAT
The controls can be damaged by excessively high
temperatures. Make sure the maximum ambient tempera-
ture at the control locations will not exceed the rating of the
control. If the appliance normally operates at very high
temperatures, insulation, shielding, and air circulation may
be necessary to protect the controls. Proper insulation or
shielding should be provided by the appliance manufac-
turer; make sure adequate air circulation is maintained
when the appliance is installed.
2
TABLE 1—INTERMITTENT PILOT IGNITION MODULES.
IGNITER-
100
SENSOR
TYPE
PREPURGE
PERCENT
LOCKOUT
IGNITION
MODEL
TYPE
OF GAS
TIMING
SHUTOFF
TIMING
SEQUENCE
a
S8610A
Separate
Natural
None
No
No
Spark on until pilot
lightoff or manual
S8610F
Combination
shutoff; pilot valve
open until manual
shutdown.
S8610B
Separate
Natural
None
Yes, at
15 or 90
Spark on until pilot
or LP
lockout
sec. max.,
lightoff or lockout;
S8610H
Combination
as ordered
pilot valve closes
on lockout.
S8670D
Combination
Natural
45 sec.
Yes, at
15 or 90
Ignition trial follows
or LP
lockout
sec. max.,
prepurge; spark on
as ordered
until pilot lightoff or
lockout; pilot valve
closes on lockout.
a
If established flame is lost, all models restart ignition trial.
APPLICATION
These ignition modules provide ignition sequence, flame
monitoring, and safety shutoff for intermittent pilot central
furnaces and heating appliances. S8610 and S8670 mod-
els include a connector that converts the existing ignition
cable from a stud terminal receptacle to a 1/4 inch female
quick-connect. S8610 and S8670 provide up to 1.0 A pilot
and 2.0 A main valve current rating. Minimum ambient
temperature rating is -40
°
F [-40
°
C]. Maximum ambient
rating is +175
°
F [+79
°
C] for S8610, S8670 used with 1.0
A or less main valve. Maximum ambient rating for S8610,
S8670 used with 1.0 to 2.0 A main valve is +165
°
F [+74
°
C].
See Table 1 for a summary of other differences between
models.
S8610A,B,F,H AND S8670D
INTERMITTENT PILOT MODULE
PLANNING THE INSTALLATION
Intermittent pilot systems are used on a wide variety of
central heating equipment and on heating appliances such
as commercial cookers, agricultural equipment, industrial
heating equipment, and pool heaters. Some of these appli-
cations may make heavy demands on the controls, either
because of frequent cycling or because of moisture, corro-
sive chemicals, dust, or excessive heat in the environment.
In these situations, special steps may be required to pre-
vent nuisance shutdowns and premature control failure.
These applications require Honeywell Residential and Build-
ing Controls Engineering review; contact your Honeywell
Sales Representative for assistance.
FREQUENT CYCLING
These controls are designed for use on space heating
appliances that typically cycle 3 to 4 times an hour during
the heating season and not at all during the cooling season.
In an application with significantly greater cycling rates and
closer to year-round use, we recommend monthly checkout
because the controls may wear out more quickly.
WATER OR STEAM CLEANING
Once a module or gas control has been wet, it may
operate unreliably and must be replaced. If the appliance is
likely to be cleaned with water or steam, the controls and
associated wiring should be covered so water or steam flow
cannot reach them. The controls should be high enough
above the bottom of the cabinet so they will not be subject
to flooding or splashing during normal cleaning procedures.
If necessary, shield the controls to protect them from
splashing water. A NEMA 4 enclosure is recommended for
the ignition module; see the Electronic Ignition Service
Manual, form 70-6604.
HIGH HUMIDITY OR DRIPPING WATER
Over time, dripping water or high ambient humidity can
create unwanted electrical paths on the module circuit
board, causing the module to fail.
Never
install an appli-
ance where water can drip on the controls.
In addition, high ambient humidity can cause the gas
control to corrode, and finally to fail.
Where the appliance may be installed in a humid atmos-
phere, make sure air circulation around the module and gas
control is adequate to prevent condensation. It’s also im-
portant to regularly check out the system. A NEMA 4
enclosure may be needed; see the Electronic Ignition
Service Manual, form 70-6604.
CORROSIVE CHEMICALS
Corrosive chemicals can also attack the module and gas
control and eventually cause a failure. Where chemicals
may be used routinely for cleaning, make sure the cleaning
solution cannot reach the controls. Where chemicals are
likely to be suspended in air, as in some industrial and
agricultural applications, protect the ignition module from
exposure with a NEMA 4 enclosure; see the Electronic
Ignition Service Manual, form 70-6604.
DUST OR GREASE ACCUMULATION
Heavy accumulation of dust or grease may cause the
controls to malfunction. Where dust or grease may be a
problem, provide covers for the module and the gas control
that will limit environmental contamination. A NEMA 4
enclosure is recommended for the ignition module; see the
Electronic Ignition Service Manual, form 70-6604.
D.T.
Form Number 69-0523
5-90
©Honeywell Inc. 1990
