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AMBIENT TEMPERATURE RATING: Minus 40 F to
plus 175 F [minus 40 C to plus 79 C].
WIRING CONNECTIONS: l/4 in. [6.4 mm] male
quick-connect terminals, for all except ALARM ter-
minal. ALARM terminal, l/4 in. [6.4 mm] female
quick-connect. l/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): 2-318 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: l/4 in. [8.4 mm] diameter base
stud for ignition cable.
MOUNTING: Bracket, see Fig. 2.
DIMENSIONS: See Fig. 2.
FIG. 2-lUSTALLA’F(ON MMHBIONS NV in. [mm IN
BRACKETS] OF Q347A.
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: l/4 in. [6.4 mm] male
quick-connect terminal.
FLAME ROD MATERIAL: Kanthal.
MOUNTING: Bracket, see Fig. 3.
DIMENSIONS: See Fig. 3.
FIG. 3-DIMENSIONS IN in. [mm IN BRACKETS] OF
Q354A.
392286-l 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): l/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 in the following recommended
gas controls.
3
68-0014