Honeywell Y343B1002 User 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.
L.H.
1-83»
Form Number 68-0014
©Honeywell Inc. 1983
Y343B1002
The Y343B1002 Direct Spark Gas Burner Ignition
Package includes the S87D Electronic Module, Q347A
Spark Igniter-Sensor, Q354A Flame Sensor and
392286-1 Ignition Cable Assembly.
Other controls needed to complete the heating sys
tem include a 24 V, DSI gas valve; 24 V thermostat:
24 V transformer and high temperature limit
controller.
S87D CONTROL MODULE
The S87D contains the electronic components of
the system and also serves as a central v\/iring panel
for the external controls. Powered by a 24 V trans
former and controlled by a thermostat, it performs the
following functions.
1. Checks for a false flame condition (short to
ground). Module will lock out if false flame condition
is present.
2. Generates a potential of 15,000 V (open circuit)
at the spark-igniter stud for direct ignition of the main
burner.
3. Operates gas valve (internal relay controls inde
pendent gas valve circuit).
4. Senses the presence of main burner flame and
discontinues ignition spark. If the burner fails to ignite
within the trial-for-ignition period, safety lockout oc
curs.
5. If there is a loss of power, the system will shut
down safely. Start-up is initiated when power is
restored.
6. If there is a loss of main burner flame, the timed
trial-for-ignition is repeated. Safety shutdown occurs
if flame is not reestablished within the trial-for-ignition
period.
7. Normally closed contacts in internal relay may
be used for an alarm circuit to signal safety shutdown
of system.
ELECTRICAL RATINGS:
Voltage and Frequency—24 Vac, 60 Hz.
Current Rating—0.2 A plus gas valve current draw.
SAFETY LOCKOUT TIMING: 11 seconds.
FLAME FAILURE REIGNITION TIME: 0.8 seconds
maximum.
FLAME CURRENT SIGNAL REQUIRED: 1.5 pA dc
minimum.
SPARK GENERATOR VOLTAGE: 15,000 V open
circuit.
MOUNTING: Mounts in any position. See Fig. 1.
DIMENSIONS: See Fig. 1.
FIG. 1—DIMENSIONS FOR S87 IN in. [mm IN
BRACKETS].
(continued on page 3)
ORDERING INFORMATION
WHEN PURCHASING REPLACEMENT AND MODERNIZATION PRODUCTS FROM YOUR TRADELINE
WHOLESALER OR YOUR DISTRIBUTOR, REFER TO THE TRADELINE CATALOG OR PRICE SHEETS FOR
COMPLETE ORDERING NUMBER, OR SPECIFY—
Combination gas control (for DSI
1. Order number Y343B1002.
2. Safety lockout timing (11 seconds).
3. DSI system controls, as required.
a. 24 V, 60 Hz transformer.
b. Low voitage thermostat or temperature controller.
IF YOU HAVE ADDITIONAL QUESTIONS, NEED FURTHER INFORMATION, OR WOULD LIKE TO COMMENT ON OUR
PRODUCTS OR SERVICES, PLEASE WRITE OR PHONE:
1. YOUR LOCAL HONEYWELL RESIDENTIAL SALES OFFICE (CHECK WHITE PAGES OF YOUR PHONE
DIRECTORY).
2. RESIDENTIAL DIVISION CUSTOMER SERVICE
HONEYWELL INC., 1885 DOUGLAS DRIVE NORTH
MINNEAPOLIS, MINNESOTA 55422 (612)542-7500
(IN CANADA—HONEYWELL LIMITED/HONEYWELL LIMITEE, 740 ELLESMERE ROAD, SCARBOROUGH,
ONTARIO M1P 2V9). INTERNATIONAL SALES AND SERVICE OFFICES IN ALL PRINCIPAL CITIES OF THE
WORLD.
c.
application).
High iimit temperature controiler and
d.
auxiiiary safety controis.
Aiarm signai (if required).
e.
AMBIENT TEMPERATURE RATING: Minus 40 F to
plus 175 F [minus 40 C to plus 79 C].
WIRING CONNECTIONS: 1/4 in. [6.4 mm] male
quick-connect terminals, for all except ALARM ter
minal. ALARM terminal, 1/4 in. [6.4 mm] female
quick-connect. 1/4 in. [6.4 mm] diameter stud
base for ignition cable.
REPLACEMENT PARTS: 3 A fuse.
Q347A SPARK IGNITER-SENSOR
The Q347A, powered by the S87D Electronic Mod
ule, produces a spark for direct ignition of the main
burner. The Q347A consists of an inner electrode
(insulated rod) and an outer electrode (rigid, formed
strap bent at end to extend over tip of inner rod). Tip of
electrodes extend into path of main burner gas; arcing
across spark gap ignites gas.
SPARK GAP: 5/32 in. [4 mm].
LENGTH OF ELECTRODE ASSEMBLY (mounting sur
face to tip): 2-3/8 in. [60.3 mm].
ELECTRODE MATERIAL: Kanthal.
MAXIMUM TEMPERATURE RATINGS: 1800 F [982 C]
at tip of electrode assembly, 1250 F [677 C] at
ceramic insulator.
WIRING CONNECTION: 1/4 in. [6.4 mm] diameter base
stud for ignition cable.
MOUNTING: Bracket, see Fig. 2.
DIMENSIONS: See Fig. 2.
Q354A FLAME SENSOR
The Q354A consists of a flame rod supported in a
ceramic insulator with mounting bracket. Positioned so
that the end of the flame rod is immersed in the main
burner flame, and with the burner head serving as the
ground area, it operates on the flame rectification
principle. In the presence of main burner flame, a direct
current is established to prove burner ignition and to
continuously monitor the flame during the burner-on
period.
MAXIMUM TEMPERATURE RATING: 2200 F [1204 C]
at tip of rod, 1250 F [677 C] at ceramic insulator.
WIRING CONNECTION: 1/4 in. [6.4 mm] male
quick-connect terminal.
FLAME ROD MATERIAL: Kanthal.
MOUNTING: Bracket, see Fig. 3.
DIMENSIONS: See Fig.3.
BRACKETS] OF Q347A.
FIG. 3—DIMENSIONS IN in. [mm IN BRACKETS] OF
Q354A.
392286-1 IGNITION CABLE
This cable is used to connect the Q347A Spark
Igniter-Sensor to the S87 Electronic Module.
CABLE: No. 16 gauge high tension, 485 F [251 C]
heated, oil resistant.
LENGTH: 30 in. [762 mm].
CONNECTORS (2): 1/4 in. [6.4 mm] diameter spring
clip type with insulating boot. Two straight boots.
GAS CONTROLS
Combination gas controls are directly controlled by
the internal relay in the S87D. Maximum electrical
rating for DSI gas valve control is 2.0 A. See individual
publication for complete specifications and installation
instructions on the following recommended
gas controls.
68-0014
TABLE 1—GAS CONTROLS.
CAPACITY RANGE OF
TYPE OF PRESSURE
MODEL NO.
V845A
VR8450A
V845C Step-open
VR8450C Step-open noto 290 3.1 to 7.8
VR8540A
VR8590A
VR8600A
REGULATOR
Standard noto 335 3.1 to 9.5 60-2315
Standard noto 290 3.1 to 7.8 68-0016
Two-stage noto 290 3.1 to 7.8 68-0021
Negative
Negative 37 to 400 I.Oto 11.3 68-0017
STANDARD MODEL
cfh mVhr
noto 335 3.1 to 9.5 60-2315
37 to 400
I.Oto 11.3
PUBLICATION FORM
NUMBER
68-0016
68-0017
AUXILIARY CONTROLS
REQUIRED FOR BASIC DSI SYSTEM
1. TRANSFORMER. Select transformer with ade
quate VA. S87D requires a 24 Vac transformer. For
common system transformers, capacity must be ade
quate for S87D, temperature controller, gas control and
any other device powered by the transformer (see
Table 2).
2. LOW VOLTAGE TEMPERATURE CONTROLLER.
Select a 24 Vac thermostat for single-stage or
two-stage burner control (depending on heating sys
tem).
DETERMINED BY PARTICULAR APPLICATION
Refer to separate publications for information on the
controls utilized by the appiiance manufacturer. These
INSTALLATION
WHEN INSTALLING THIS IGNITION PACKAGE. ..
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazardous
condition.
2. Check the ratings given in the instructions and on
the product to make sure it is suitable for your
application.
3. The installer must be a trained, experienced
service technician.
4. After installation is complete, check out system
operation.
controis are:
1. High iimit temperature controlier and other safety
controis as required.
2. Gas vaive. Refer to Tabie 1 above.
3. Alarm signal as desired for the circuit under
control of the S87D.
CAUTION
1. When using a common transformer to power
both S87D and gas control circuit, use a good
quality transformer of adequate VA. If trans
former VA is inadequate, the S87D internal
relay may chatter.
2. When two or more transformers are used, they
must be properly phased and grounded.
S87D CONTROL MODULE
Select a location within 30 in. [762 mm] maximum of
the burner that will permit a direct cable route to the
Q347A spark igniter. Ready access to the terminals is
necessary for wiring and servicing. Do not exceed the
ambient temperature rating given in the SPECIF
ICATION section.
The S87 may be mounted in any position. See Fig. 1
for mounting dimensions. Use No. 6-32 machine screws
or No. 8 sheetmetal screws 1 in. long for fastening.
Fasten securely.
CAUTION
1. Disconnect power supply before wiring to pre
vent electrical shock or equipment damage.
2. If a new gas control is to be installed, turn off
gas supply before starting installation. Be sure
to conduct a Gas Leak Test after the gas
control is installed (follow manufacturer’s
instructions).
IMPORTANT-
If this is a replacement application, follow the
appliance manufacturer’s instructions. The manu
facturer usually provides wiring diagrams,
start-up and checkout instructions and service
procedures for their system. If manufacturer’s
instructions are not available, the information
below may be used as a general guide.
Q347A SPARK IGNITER-SENSOR
The Q347A should be rigidly mounted in an ac
cessible location. It must remain in a fixed position
relative to the main burner. The Q347 may be mounted
on a separate bracket or on the same bracket with the
Q354A Flame Sensor. On multiple burners, the 0347
may be mounted at one end of the row and the 0354 at
the other end to delay spark cutoff until all burners are
ignited.
IMPORTANT-
The ignition cable limits the distance between the
0347 and S87 to 30 in. [762 mm] or less. This may
affect the location selected for the 0347 and/or
S87. Ignition cable must not touch grounded
object or current-carrying wires.
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