SR
-SERIES
79
FLAME WITH NO CALL FOR HEAT (FLAME FAULT)
•
If at any time the main valve fails to close completely and maintains a flame, the full time flame
sense circuit will detect it and energize the combustion blower. Should the main valve later close off
completely removing the flame signal, the combustion blower will power off.
IGNITION LOCK OUT (FAILURE TO LIGHT)
•
FENWAL DSI Module will attempt three ignition trials before going into lockout. The valve relay will
be de-energized immediately, and the combustion blower will be turned off.
•
Recovery from lockout requires a manual reset by either resetting the thermostat or removing 24
volts, or removing the electrical power supply for a period of 5-seconds.
•
If the thermostat is still calling for heat after one hour, the control will automatically reset and
attempt to ignite the burner again.
If unit still does not operate, proceed as follows:
•
Check flame sensor current. (see below)
•
Check electrode for cracks and proper location, (see page 80)
FLAME SENSOR CURRENT CHECK
SERVICE CHECKS
Flame current is the current which
passes through the flame from the
sensor to the ground. The minimum
flame current necessary to keep the
system from lockout is .7 micro amps.
To measure flame current, connect
an analog DC micro ammeter to the
FC- FC terminals per figure. Meter
should read. 7 uA or higher. If meter
reads below "0" on scale, meter leads
are reversed. Disconnect power and
reconnect meter leads for proper
polarity.
Figure 64. FLAME SENSOR CURRENT CHECK
Summary of Contents for SR Series
Page 18: ...SR SERIES 14 PIPE BOXES Figure 11 PIPE BOX CONTENT...
Page 19: ...SR SERIES 15 10 3 M REFLECTOR PACKAGE Figure 12 10 3 M REFLECTOR PACKAGE CONTENTS...
Page 20: ...SR SERIES 16 15 4 16 M REFLECTOR PACKAGE Figure 13 15 4 16 M REFLECTOR PACKAGE CONTENTS...
Page 21: ...SR SERIES 17 20 6 1 M REFLECTOR PACKAGE Figure 14 20 6 1 M REFLECTOR PACKAGE CONTENTS...
Page 22: ...SR SERIES 18 30 9 1 M REFLECTOR PACKAGE Figure 15 30 9 1 M REFLECTOR PACKAGE CONTENTS...
Page 23: ...SR SERIES 19 40 12 2 M REFLECTOR PACKAGE Figure 16 40 12 2 M REFLECTOR PACKAGE CONTENTS...
Page 24: ...SR SERIES 20 50 15 2 M REFLECTOR PACKAGE Figure 17 50 15 2 M REFLECTOR PACKAGE CONTENTS...
Page 25: ...SR SERIES 21 60 18 3 M REFLECTOR PACKAGE Figure 18 60 18 3 M REFLECTOR PACKAGE CONTENTS...
Page 26: ...SR SERIES 22 70 21 3 M REFLECTOR PACKAGE Figure 19 70 21 3 M REFLECTOR PACKAGE CONTENTS...
Page 27: ...SR SERIES 23 80 24 4 M REFLECTOR PACKAGE Figure 20 80 24 4 M REFLECTOR PACKAGE CONTENTS...
Page 28: ...SR SERIES 24 10 3 M EXTENSION KIT Figure 21 10 3 M EXTENSION PACKAGE CONTENTS...
Page 29: ...SR SERIES 25 SIDE REFLECTOR PACKAGE Figure 22 SIDE REFLECTOR PACKAGE CONTENTS...
Page 56: ...SR SERIES 52 SIDE REFLECTOR Figure 52 SIDE REFLECTOR INSTALLATION...
Page 78: ...SR SERIES 74 24 0 GAS VALVES Figure 62 GAS VALVE Figure 63 PRESSURE REGULATOR...
Page 94: ...SR SERIES 90...
Page 95: ...SR SERIES 91...