Honeywell Y343B1002 - Manual

Honeywell
THE Y343B IGNITION PACKAGE PROVIDES
DIRECT SPARK IGNITION (DSI) FOR GAS
HEATING SYSTEMS. THE PACKAGE IN­
CLUDES THE S87D ELECTRONIC MODULE,
Q354A FLAME SENSOR, Q347A SPARK IG­
NITER-SENSOR
AND 392286-1 IGNITION
CABLE.
DEPENDABLE BURNER IGNITION
□ Spark generated by electronic module and
internal step-up transformer.
SOLID STATE DESIGN
□
Compact, solid state components provide
accurate, long-lasting performance.
□ No mechanical friction or wear.
MAXIMUM OPERATING SAFETY
□ Proves presence of flame on burner igni­
tion, then protects against burner flame-out
and interruption of electric power or gas sup­
ply during run cycle.
□ Open or short circuit in any electronic com­
ponent results in safety shutdown.
USES FLAME RECTIFICIATION PRINCIPLE
□ Any false flame signal, including electrical
short or ground, results in safety shutdown.
□ Ignition is started, main burner is ignitied,
burner
flame is proved and continuously
monitored during main burner-on period. Ig­
nition spark is discontinued when flame is
proved.
CONVENIENT REMOTE
RESTART PROCEDURE
□ After safety shutdown, equipment must be
manually reset from remote thermostat or
temperature controller.
□ System automatically locks out after
trial-for-ignition. If malfunction exists, correc­
tion must be made before system is manually
reset.
LOW VOLTAGE CONTROL CIRCUIT
□ Permits use of 24 V thermostat for op­
timum temperature control.
□ Reduced wiring costs — both on appliance
and on job.
GAS VALVE CONTROL
□ S87D internal relay switches the gas valve
on and off.
□ System can be used with a 2-stage gas
valve, if desired.
ALARM CONTROL
□ Optional alarm circuit provides 24 Vac for
an automatic visual or audible signal if any
part of system malfunctions and causes a
lockout.
Y343B1002
L.H.
1-83»
Form Number 68-0014
©Honeywell Inc. 1983