Schwank supremeSchwank IO-210 - Manual (Page 26)

2300 / IO 210 Manual
IM110107
RD: MAY 2014
R.L. 15A
26
Flame Failure - Re-Ignition:
If the established flame signal is lost while the burner is operating, the control will respond
within 0.8 seconds. The HV spark will be energized for a trial ignition period in an attempt to
relight the burner.
If the burner does not light the control will make two more attempts to relight the burner before
de-energizing the gas valve. If the burner does not relight, the control will go into lockout as
noted above in “Failure to light”. If flame is re-established, normal operation resumes. Multi-try
models will allow three trials for ignition including interpurge delay between trials.
Cautions:
1. The ceramic insulator of the igniter assembly should not be in or close to the flame.
2. The electrode assembly should not be disassembled and care must be used in making mi-
nor gap adjustment. The spark electrode should have a gap spacing of 1/8”- 3/16”
(3.12± 0.81 mm). If this spacing is not correct, the assembly must be carefully adjusted.
3. Exceeding the temperature limits can cause nuisance lockouts and premature electrode fail-
ure.
The control must be secured in an area that will experience a minimum of vibration and remain
below the maximum operating temperature of 160°F.
Flame current is the current
which passes through the flame
from the sensor to ground. The
minimum flame current neces-
sary to keep the Fenwal 35-60
system from lockout is 0.7 mi-
croamps (µA). To measure the
flame current, connect analog
DC microammeter to the FC-
FC+ terminals.
Meter should read 0.7 µA or
higher. If the meter reads below
“0” on scale, meter leads are
reversed. Disconnect power
and reconnect meter leads for
proper polarity.