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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
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