Roberts Gorden POP-ECA/PGP-ECA 015 to 0100 Sequence of Operation, Fault Display Messages

SECTION 10: COMMISSIONING

10.7.2 Sequence of Operation

The operating sequence is as follows:

With the external controls on and calling for heat, the burner fan and electric ignition will switch on. After a combustion air purge of approximately twelve seconds, the oil solenoid valve will open and the burner will fire. After another five seconds, the electric ignition is turned off and the burner will go into its normal run position. The photo cell continuously monitors the safe presence of the flame. When the temperature control is satisfied, the control box will turn off all its outputs simultaneously and return to the rest position for the beginning of the next sequence.

10.7.3 Fault Display Messages

On burner failure, the red LED is permanently illuminated for a period of approximately 10 seconds, followed by a brief “dark phase”, then one of the following flash-codes will indicate the cause of the fault. See Table 1 and Table 2. This indication will repeat as long as the lockout reset button is not reset.

Table 1: Fault Display

Flash-Code Key		Message	Flash-Code
Short Pulse	l	Pre-ignition	l l l l .
		tv1
Long Pulse	l	Safety Time	l l .
		tv2
Short Pause .		Delay Time to Valve V2	l l l .
		tv2
Long Pause _		Running	l _
		Low Mains Voltage	l l l _

Table 2: Error Diagnosis

Error Message	Flash-Code	Possible Fault
Lockout	l l l l l	Within lockout safety time,
		no flame established.
	l l l l l	Stray light during monitor
Stray Light		phase, detector may be
		faulty.

Flash-Code for Manual Lockout
Manual/External	l l l l l _ l l l l l
Lockout

10.7.4 Fault Conditions

If at any stage during normal running the photo electric cell fails to detect the flame, the control will switch off and make an instant restart attempt. If the flame signal is still missing, “lockout” will occur.

If the flame is not detected by the photo cell during a normal start, there will be no restart attempt and “lockout” will occur in approximately 17 seconds after the start.

If a flame is detected during the first 12 seconds (purge), the solenoid valve will not open and the control will “lockout”. For the control sequence, see Page 38, Figure 18.

10.7.5 Switching On

Turn on the heater with the external controls. (Heat ON). If the "Lockout Reset" button is illuminated, press to reset. The combustion air fan and electric ignition should work immediately. Vent the burner oil

pump at the same time by loosening the pump vent port (pump must be running). If the burner goes into "lockout" before the pump has vented, wait one minute, then reset the control box and repeat 10.7.5 until all the air has been vented from the pump and the burner fires.

NOTE: The burner plug and socket may be used to turn off the burner during commissioning.

10.7.6 Adjust Burner Oil Pressure

Adjust the burner oil pressure to the value in the data table for the burner reference letter and burner manufacturer’s information for details of the burner oil pump. When completed, turn off burner and remove test gauge and refit plug.

10.7.7 Set Combustion Air

The combustion air must be set. Measure the emissions in the flue at a point within one metre from the outlet of the heater and adjust for the highest carbon dioxide (CO2) levels obtainable, usually 10.5

-11.0%, while making little or no smoke (smoke number 0-1). The test must be carried out with all covers fitted and after the heater has been running for 15 minutes.

10.7.8 Complete the Commissioning

Test the burner for correct start and stop operation several times. Check that all safety devices operate correctly. Inspect the heater for any oil leaks and repair where necessary.

10.8 Turning Off the Heater (all models)

Set the external controls to the “off” position and the main burner will stop. The fans will run until they are stopped automatically by the fan thermostat.

Do not use Electrical Isolator for control of heater. The Electrical Isolator will switch off the fan. The heat exchanger could be damaged. The Warranty will not cover damage to the heat exchanger if operated improperly.

10.9 External Controls

External controls may include a time switch, room thermostat and frost thermostat. Operate each control to ensure that they function correctly. Set the time switch (if fitted) and room thermostat to the user’s requirements.

10.10 Instruction to the User

Explain the controls of the heater to the user, including how to turn it on and off, using the controls fitted on site.

Give this manual to the user.

Ensure that the user is shown and understands the importance of maintaining clearances to combustibles; the user instructions on Page 40, Section 11 through Page 41, Section 11.4; and all warnings defined in this manual.

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