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21.6 - POOR FLAME PICTURE
a.
Check the supply pressure is correct at the isolation elbow. If the pressure is low, check gas pipe sizing, quality of pipe bending.
Check for debris in the gas supply and or gas filter if fitted.
b.
All Control Systems have a pressure point to allow the Burner Pressure to be checked. On the Manual Control it is visible at the
front left of the control. On High Level Control it is on the left of the control and on the Thermatronic it is at the front of the Control
and is the left/rear Pressure Test Point. You may wish to check
‘c’
first.
c.
With the High Level Controls check the Buttons are operating correctly see Sections 21.3 & 21.4.
d.
Check that another appliance is not affecting the gas supply pressure.
e.
Check there is not a flue/ventilation problem – carry out a spillage test.
f.
Check fuel bed layout as detailed in Section 17.
21.7 - FIRE OPERATES FOR A WHILE THEN GOES OUT
a.
Check the supply pressure is correct at the isolation elbow with all other gas appliances working. If the pressure is low or
fluctuating up and down check gas pipe sizing, quality of pipe bending. Check for debris in the gas supply, pilot pipe and or gas
filter if fitted.
b.
Carry out a spillage test from cold. Look for signs of Discoloured Walls or Trims as this may be an indication of a Downdraught
Problem.
c.
Establish how long the fire stays alight then repeat the Spillage Test around this time.
d.
For the Thermatronic System check that the Control is functioning correctly as detailed in Section 21.2 specifically the
Thermocouple Electrical Connections and Pilot Flame size.
Downdraught problems can be related to the condition of the flue, chimney termination or geographical location; so if a
Flue Problem is thought likely but no problem is found during the investigation isolate the fire and seek expert advice.
21.8 - THERMATRONIC RADIOA FREQUENCY CONTROL SYSTEM DOES NOT OPERATE
a.
Check the Control is being operated correctly - see Section 2.2
b.
Check for error messages and check batteries - see Section 2.3
c.
Reset the Mertik Maxitrol Logic Circuits - see Section 21.1
21.9 -
HIGH LEVEL PUSH BUTTON CONTROLS DO NOT OPERATE
a.
Change the batteries then see if the push buttons now operate.
b.
The Switch and Receiver/Battery Box should be replaced.
Important :
In instances where it is indicating that the main control system needs changing, (specifically the 3 Button High
Level or Thermatronic Control Systems), you should investigate returning the whole Burner Control Assembly to Nu-Flame for recti-
fication as this could be the least cost option.
ALWAYS CONDUCT A GAS SOUNDNESS AND SPILLAGE CHECK AFTER SERVICING.
ALWAYS RESEAL THE PRESSURE TEST POINTS YOU HAVE USED AND CHECK THAT THEY ARE GAS TIGHT.
(This accounts for a lot of recalls.)
ALWAYS CHECK THAT THE CONTROL SYSTEM IS WORKING CORRECTLY.
(This accounts for a lot of recalls.)
