Spark Ignition Circuit - Schwank 2300 Series Installation & Owner's Manual

11. 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
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.
CAUTION
Page 15
2300 / IO 210 Manual
IM091231
RD: DEC 2009
R.L. 11B
BA