9-Gas Valves GV1
is energized by the ignition control simultaneously with the
stages without delay. FIGURE 17 shows gas valve com-
po nents. TABLE 3 shows factory gas valve regulation for
LDT units.
TABLE 3
GAS VALVE REGULATION FOR LDT UNITS
Max Inlet
Pressure
“W.C.
Operating Pressure “W.C.
(outlet) Factory Setting
Natural L.P. Propane
Low High Low High
13.0 1.6+0.2. 3.7+0.3 +0.3 +
10-Spark Electrodes FIGURE 12
An electrode assembly is used for ignition spark. The
electrode is mounted through holes under the left most
envelope of the adjacent burner. The electrode assembly
is fastened to burner supports and can be removed for
service without removing any part of the burners.
During ignition, spark travels through the spark electrode
from burner to burner until all are lit.
The spark electrode is connected to the ignition control by
a 8 mm silicone-insulated stranded high voltage wire. The
ends of the wire.
NOTE - If electrode wire is replaced, wire and suppression
must be same type cable.
The spark electrode assembly can be removed for inspec-
tion by removing the screw securing the electrode assem-
bly and sliding it out of unit.
For proper unit operation, electrodes must be positioned
and gapped correctly.
Spark gap may be checked with appropriately sized twist
drills or feeler gauges. Disconnect power to the unit and
remove electrode assembly. The gap should be between
NOTE-
ELECTRODE, HIGH VOLTAGE WIRE SHOULD TOUCH
UNIT CABINET AS LITTLE AS POSSIBLE.
SPARK GAP
SHOULD BE 1/8”
(3mm)
FIGURE 12
11-Flame Sensor (Figure 13)
The sensor is mounted through a hole in the burner sup-
right most burner. The sensor assembly is fastened to
burner supports and can be removed for service without
removing any part of the burners.
-
diately or after the eight second trial for ignition. During
-
SIDE VIEW SENSOR
1-3/4”
(45mm)
3/8”
(10mm)
Gas Flow
FIGURE 13
To Next Page
Loading...
