Fuel Gas; When There Is No Gas Flow At The Pilot Head; When The Pilot Goes Out, Problems With The Gas Supply; Thermocouple - Jøtul GF 3 CF Instrucciones Para Instalación

Fuel gas

Correct gas pressure is important: See section about gas
pressure under gas installation. The gas pressure before
the valve and the gas pressure from the valve to the main
burner and pilot burner, are equally important. These
parameters may be the cause of various problems with
the fireplace, for example:
If the gas pressure is too low it will cause:
Low pilot flame, insufficient production of electricity at
thermocouple, and poor flame pattern.
If the gas pressure is too high it will cause:
Extreme cases where the valve is damaged when the
pressure rises above 60 mbar . This is usually the result of
faulty installation or lack of a gas regulator on the gas tank
or cylinder. High gas pressure may also cause an abnormally
large pilot flame, which can overheat the thermocouple,
and further cause a shutoff of the valve due to insufficient
millivolt production. Problems involving high flames and
soot indicate that the air volume is too small in relation to
the gas volume.
Checking the gas pressure before the valve will uncover
faults in the gas supply at the valve or from the tank/
cylinder.
If the gas pressure to the valve is correct (with the
appliance running - not the standing pressure), the fault
must be found after the valve. A measurement performed
with a manometer (fig. 3) will help you to swiftly uncover
and eliminate sources of errors.
As mentioned above, blocked or poor gas supply may lead
to faulty combustion. Make sure all gas tubes are dirt-free,
as a small dust particle can obstruct the pilot orifice.
Components must remain free of dirt during installation
of the gas supply and connection to the appliance, and when
the valve is being replaced.
When there is no gas flow at the
pilot head:
This is the trouble-shooting procedure for the
gas supply:
• Check if all gas connections are sealed by using leak
detector fluid or strong soapy water (avoid synthetic
soaps).
• Then make sure all valves from the gas tank/cylinder
are open.
• When the pilot is to be lit for the first time with a new
installation, after a scheduled disconnection or after
the LPG tank has been refilled, there will often be air in
the gas tube leading up to the fire place. The tube
system must be cleared of air before the pilot burner
can be lit. The recommended method for clearing air
out of the tube system, is to push in the gas control
knob and turn anti-clockwise. Repeat the procedure until
the pilot is lit.
All manuals and user guides at all-guides.com
• If the pilot does not light after attempts to clear the
• Note! The Mertik Maxitrol Valves are always equipped
• If gas tubes are dismantled, all gas tubes must be
When the pilot goes out – problems
with the gas supply:
This is the trouble-shooting procedure for the
gas supply:
• Remember to push in the gas control knob (fig. 2-1) for
• Make sure the flame is centred at the thermocouple.
• Make sure the thermocouple is enveloped by the flame
• If the flame is abnormally large or small, check the gas
• Then check for errors, dirt or corrosion on the pilot burner
Note! There could be a leak after the valve even if the pressure
is OK at testpoint (B). You should therefore always check for
leakage.
Thermocouple (fig.4)
A thermocouple is in principle a thermal generator and
consists of a copper wire (copper-nickel alloy) and an iron
wire twisted together. These wires will create electron
movement and generate 25 millivolts when exposed to a
temperature difference of 200°C. This voltage is sufficient
to make the gas valve function.
It is important to understand that even minor resistance
(ohm) will have great impact on such a small voltage. If
resistance is too great, the gas valve may not receive enough
voltage to operate. If there is too much resistance, the
cause may be that the copper wire conducting the voltage
is too long, or there are too many connections. If the copper
wire comes in contact with metal, it may increase
resistance and consequently reduce the voltage.
tube system of air, it indicates is a problem with the gas
tank/cylinder or a leak in the gas tube. Check the gas
pressure as instructed in the section Gas Installation
and find out if the fault/leak is before or after the valve
on the appliance. If the gas pressure at testpoint(A)
(fig. 3 ) is too low or there is no gas pressure at all, the
fault or leak must be located before the valve on the
appliance. If the gas pressure is OK at testpoint (A), but
too low or too high at testpoint (B), then the fault or
leak must be located after the valve.
with a fine filter at the inlet to avoid dirt from entering
into the valve. Consequently, dirt in the valve is not a
common occurance.
reinstalled and checked for gas leaks prior to operating
the fireplace.
at least 15 seconds.
up to at least 3 mm (1/8") from the tip (fig. 4).
pressure first. See section about gas pressure.
(fig. 6-B), the pilot orifice (fig. 6-D) and the gas supply
(fig. 6-E) to the pilot burner.
ENGLISH
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