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Honeywell Y343B1002 User Manual

Honeywell

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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