Honeywell Y343B1002 - Manual (Page 2)

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—
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.
c.
d.
e.
Combination gas control (for DSI
application).
High iimit temperature controiler and
auxiiiary safety controis.
Aiarm signai (if required).
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.