Cleveland SteamCraft 10 Service Manual page 204

200 SteamCraft 10 Service Manual, Chapter 8
APPLICATION
These ignition modules provide ignition sequence,
flame monitoring and safety shutoff for intermittent
pilot central furnaces and heating appliances. S8600
and S8660 models provide up to 1.0 A pilot and 1.0 A
main valve current rating. Minimum ambient
temperature
MODEL IGNITER-
SENSOR
TYPE
S8600M Combination
ªIf established flame is lost, all models restart ignition trial.
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 applications may make heavy
demands on the controls, either because of frequent
cycling, or because of moisture, corrosive chemicals,
dust or excessive heat in the environment. In these
situations, special steps may be required to prevent
nuisance shutdowns and premature control failure.
These applications require Honeywell Residential
Division 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
J.A.
11-89
Printed 3/93
TABLE 1—INTERMITTENT PILOT IGNITION MODULES.
TYPE PREPURGE 100
TIMING PERCENT
OF GAS
SHUTOFF
Natural or None Yes, at 90
LP sec. max.
Models 24-CGA-10 and 24-CEA-10
Rating is -40°F (-40° C). Maximum ambient rating is
+175°F (+79° C) for S8600, S8660 and 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.
LOCKOUT IGNITION
TIMING
SEQUENCEª
No, Spark and pilot gas on
continuous until shutoff. After 5
retry. min. min. (6 min.- nom.)
delay, ignition starts
again. Ignition, wait,
retry repeats until pilot
lights or system is shut
down manually.
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 appliance 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
atmosphere, make sure air circulation around the
module and gas control is adequate to prevent
condensation. It's also important to regularly check out
the system. A NEMA 4 enclosure may be needed: see
the electronic Ignition Service Manual, form 70-6604.
Form Number 69-0463
©Honeywell Inc. 1989
Cleveland Range, Inc.