Schwank STSp-WP - Manual (Page 31)

SP-MSWP-BX-09A
STSp-WP Manual
RD: MAY 2004
RL: 9
KH
Page 27
23. SPARK IGNITION CIRCUIT
The step-up transformer in the ignition control provides spark ignition at 30,000 volts (open circuit). To check the spark
ignition circuit, proceed as follows.
1 Shut off gas supply to the gas control
2 Disconnect the ignition cable at the ignition control stud terminal to isolate the circuit from the spark igniter or
igniter/sensor
3 Prepare a short jumper lead, using heavily insulated wire such as ignition cable
CAUTION
In the next step, DO NOT allow fingers to touch either the stripped
end of the jumper or the stud terminal. This is a very high voltage circuit and
electrical shock can result.
1
Perform this test immediately upon energizing the system before the ignition control goes into safety lockout and
interrupts the spark circuit. Touch one end of the jumper firmly to the ignition control GND terminal. (DO NOT
remove the existing ground lead.) Slowly move the other end of the jumper wire toward the stud terminal on the
ignition control to establish a spark.
2 Pull the wire away from the stud and note the length of gap at which spark discontinues.
3 A spark length of 1/8 in. (3mm) or more indicates satisfactory voltage output. If no arc can be established, or the
maximum spark is less than 1/8 in. (3mm), and power to the ignition control input terminals was proved, replace the
ignition control.
SPARK IGNITER SET UP
Please use the following diagram for checking the Igniter
gap.
If the gap is incorrect all adjustments should be made with
the GROUND PRONG/PIN ONLY!
DO NOT BEND THE IGNITER PRONG!!!!
The black bars located at the lower right corner can be
used as a guide for adjustment.
3/16”
1/4”