Troubleshooting For Flame Supervision System - Roberts Gorden Combat POP-ECA 015 Installation, Commissioning, Operation & Service Manual

COMBAT ® C H
ABINET EATERS

14.4 Troubleshooting for Flame Supervision System

The flame supervision system is different for gas-fired and oil-fired heaters but may be tested in a
similar way.
Gas-fired heaters use a rectification flame probe to monitor the flame.
Oil-fired heaters use a photo sensitive cell to monitor the flame.
To connect a suitable meter into the circuit to monitor the flame signal current, disconnect one of the
wires to the monitor (there is only one for gas-fired).
Connect a suitable DC ammeter between the terminal just disconnected and the wire taken from it.
Should the meter read backwards, then reverse its connections.
Readings should be approximately as follows(For further details see burner manufacturer's
instructions):
Oil-Fired
Maximum flame Minimum flame
current with no current with
flame flame
12 μ Amp 25 μ Amp
Connect a DC ammeter in
series with the flame monitor.
Turn on all controls and
ensure supply to burner
Is there a current flowing
in excess of the max.
value for NO flame?
Does 'lockout' occur when
a flame is present?
'Lockout' still occurs?
Heater Operating
TROUBLESHOOT ENDS.
48
I , C
NSTALLATION OMMISSIONING
Gas-Fired
Maximum flame Minimum flame
current with no current with
flame
0.5 μ Amp 1.0 μ Amp
START
Is there a stray light entering
the burner or is there a
Yes
Inspect and test the flame
probe and wiring for a short
No
Clean or replace photo
Yes electric cell as necessary.
Replace flame probe.
Check for it's correct position.
Check wiring to flame probe.
Check burner earth
No
Yes
Replace with correct type.
No
If problems persist, contact
ROBERTS GORDON
No
Tel: +44 (0)121 506 7709
, O S
PERATION AND ERVICE
flame
OIL-FIRED
flame?
GAS-FIRED
circuit to earth.
OIL-FIRED
GAS-FIRED
connection.
Control box faulty.
® at
www.rg-inc.com
M
ANUAL
Repair or replace.