COMBAT® CABINET HEATERS INSTALLATION, COMMISSIONING, OPERATION AND SERVICE MANUAL

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

Gas-Fired

Maximum flame

Minimum flame

Maximum flame

Minimum flame

current with no

current with

current with no

current with

flame

flame

flame

flame

 

 

 

 

12 μ Amp

25 μ Amp

0.5 μ Amp

1.0 μ Amp

START

Connect a DC ammeter in

series with the flame monitor.

Turn on all controls and ensure supply to burner

 

 

OIL-FIRED

 

 

 

Is there a stray light entering

 

Is there a current flowing

 

the burner or is there a

 

Yes

flame?

Repair or replace.

in excess of the max.

GAS-FIRED

value for NO flame?

 

 

 

Inspect and test the flame

 

 

 

 

 

 

probe and wiring for a short

 

 

 

circuit to earth.

 

No

 

OIL-FIRED

 

 

 

 

Does 'lockout' occur when

 

Clean or replace photo

 

a flame is present?

Yes

electric cell as necessary.

 

 

 

GAS-FIRED

 

 

 

Replace flame probe.

 

 

 

Check for it's correct position.

 

 

 

Check wiring to flame probe.

 

 

 

Check burner earth

 

 

 

connection.

 

No

 

 

 

'Lockout' still occurs?

Yes

Control box faulty.

 

Replace with correct type.

 

 

 

 

No

 

If problems persist, contact

Heater Operating

 

No

ROBERTS GORDON® at

TROUBLESHOOT ENDS.

Tel: +44 (0)121 506 7709

 

 

 

www.rg-inc.com

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Roberts Gorden POP-ECA/PGP-ECA 015 to 0100 service manual Troubleshooting for Flame Supervision System, Oil-Fired Gas-Fired

POP-ECA/PGP-ECA 015 to 0100 specifications

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