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General Considerations - Honeywell 1000 Series Instruction Sheet

Ignition controls for combined valve and ignition system.
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SYSTEM OPERATION
Atmospheric ignition control S4585D (see fig. 47.)
After false flame check during self check time (T
igniter and pilot gas valve are switched on.
The ignition spark ignites gas and resulting flame is detected
by the combined flame/ignition rod.
Ignition is switched off immediately after flame is established
and main gas valve is switched on.
If the flame is lost during normal run, the main gas valve is
closed and re--ignition of pilot occurs.
Fan assisted ignition control S4585D (see fig. 47.)
When there is a call for heat, fan is energized through no air
P
PV
MV
NF
T
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GENERAL CONSIDERATIONS

To ensure reliable long term operation, mount ignition control
at a position in the appliance with a low ambient temperature
and a low radiation.
High temperatures will affect product life.
To suppress Radio Interferency Interference (RFI) the ignition
control including spark igniter cabling should be mounted in
sufficient shielded environment.
NOTE 16.: When first starting, the control can be in the
lock--out condition; reset the ignition control.
If a first reset is not succesful, wait at least 15
seconds before attempting another one.
After a reset an extended waiting time will occur.
) a built--in
c
T
NF
Fig. 47. Functional diagram S4585D
position of air proving switch after self check time (T
When sufficient air flow is proven by air proving switch, a
built--in igniter and pilot gas valve are switched on.
The ignition spark ignites gas and resulting flame is detected
by the combined flame/ignition rod.
Ignition is switched off immediately after flame is established
and main gas valve is switched on.
If air flow is not proven by air proving switch ignition control
will remain in a waiting mode with fan energized.
If the flame is lost during normal run, the main gas valve is
closed and re--ignition of pilot occurs.
T
T
T
FR
c
NF
NOTE 17.: Electrical rating of connected controls and air
proving switch should be appropriate for the load
that is switched by the ignition control.
NOTE 18.: Power interruptions will cause program restart.
NOTE 19.: The flame connection pin of all types is protected
against electrical schock gas pressure switch as
mentioned in this instruction sheet is a functional
device.
NOTE 20.: If the S4565 ignition control incorporates an EMC
filter, disconnect the ignition control from mains
before performing a dielectric strength test.
No flame indication
If no flame indication is built in, the indicator ligths up if there is
no flame detection within the no flame indication (T
27
Legend
Thermostat
Limiter
Fan
Air proving switch
P
Ignition
Pilot valve
PV
Flame rod
Main valve
MV
NF
No flame indicator
NF
EN1R- -9161 0006R10- -NE
).
c
) period.

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