Honeywell S9371A - Manual (Page 4)

S9360A, S9361A, S9370A, S9371A INTEGRATED BOILER CONTROLLERS
69-2076—01 4
WARNING
Fire or Explosion Hazard.
Can cause severe injury, death or property
damage.
1. The 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.
3. 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.
4. If module must be mounted near moisture or
water, provide suitable waterproof enclosure.
WARNING
Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
Disconnect power supply before beginning wiring
to prevent electrical shock or equipment damage.
Perform Preinstallation Safety Inspection
The preinstallation checks described in ANSI Standard
Z21.71 must be done before a 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 so in commercial, agricultural,
and industrial applications, because:
1. In such applications, particularly commercial, the
equipment can operate 100,000 to 200,000 cycles
per year. Such heavy cycling can wear out the gas
control in one to two years. A normal boiler applica-
tion, for which the controls were intended, typically
operate fewer than 10,000 cycles per year.
2. 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.
The maintenance program should include regular
checkout of the system as outlined under Checkout.
WARNING
Fire or Explosion Hazard.
Can cause severe injury, death or property
damage.
Do not attempt to take the module apart or to
clean it. Improper reassembly and cleaning may
cause unreliable operation, leading to an
accumulation of explosive gas.
Maintenance frequency must be determined individually
for each application. Some considerations are:
Cycling frequency. Appliances that may cycle more than
10,000 times annually should be checked monthly.
Intermittent use. Appliances that are used seasonally
should be checked before shutdown and again before the
next use.
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,
replace any module if it is wet or looks like it ever has
been wet. Protective enclosures as outlined under
Planning the Installation are recommended regardless of
checkout frequency.
Mount Module
Select a location close enough to the burner to allow a
short (3 ft. [0.9 m] maximum), direct cable route to the
igniter. Ambient temperature at the module must be within
the range listed under Specifications. The module must
be protected from water, moisture, corrosive chemicals
and excessive dust and grease. Refer to Fig. 2 and 3 for
recommended slot/hole pattern in appliance.
Fig. 2. Recommended slot/hole pattern in appliance
(in mm).
100
M24198
16
16
55
4
99.5
4