Maxi Comet Executive Exec-56-G, Instruction Manual

Page: 202 / 244

S8600, S8610, S8660, S8670 INTERMITTENT PILOT MODULE
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Frequency 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
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 is
also important 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.
Heat
The controls can be damaged by excessively high
temperatures. Make sure the maximum ambient
temperature 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 manufacturer; make sure adequate air
circulation is maintained when the appliance is installed.
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 application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out component
operation as provided in these instructions.
WARNING
Fire or Explosion Hazard. Can cause severe
injury, death or property damage.
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
Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
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 manufacturer
instructions after the gas control is installed.
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 19 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
proceeding with the installation.
Maintenance Requirements in Severe
Environments
Regular preventive maintenance is important in any
application, but especially in commercial cooking,
agricultural, and industrial applications, because:
1.
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 furnace, for which the controls were originally
intended, operates less than 20,000 cycles per
year.
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