Checking Thermal Power; Checking Gas Pressure; Connecting To A Different Type Of Gas - OFFCAR 7FRG-17R Manual De Instrucciones, Uso Y El Mantenimento

During initial installation and during maintenance or adaptation to another type of gas nominal heat input must be
measured. It can be measured by using the volumetric method with the aid of a litre counter or a chronometer.
After checking connection pressure and the diameter of the burner injectors, measure the hourly flow of the gas and
compare the recorded value with the value set out in the specifications table under the heading "gas consumption".
Deviation of ± 5% from nominal value is permitted.
GAS TYPES
NATURAL GAS G20
L.P.G. G30/31 28‐30/37 25/25 35/45
The coupling must be metal and the pipe may be rigid or flexible. Make sure that the flexible metal pipe that is fitted to
the gas coupling does not touch overheated parts and is not twisted. Use fixing clips that comply with installation
standards. Fit stopcocks or gate valves whose internal diameter is not less than the above connecting pipe. After
connecting the pipe, make sure that the joints and couplings have no leaks. Use soapy water or a purposed signed foam
product to detect leaks.
NEVER USE NAKED LIGHTS!
Switch off the appliance, disconnect the gauge and close the seal screw without forgetting to insert the washer (Ref. C)
and contact the gas company to test main gas supply pressure.
A pressure adjuster may have to be fitted upstream of the appliance.

1.5 CONNECTING TO A DIFFERENT TYPE OF GAS

REPLACING MAIN BURNER NOZZLE (Fig. 5)

CHECKING THERMAL POWER

PRESSURE in mbar
NOM. MIN. MAX.
20 18 25

CHECKING GAS PRESSURE

The appliance must be supplied with one of the types of gas
whose properties and pressure are set out in the table below:
Connect the appliance to a special gas pipe with an internal
diameter of at least 16 mm for G1/2" connections and a
diameter of at least 20 mm for G3/4" connections.
Gas supply pressure must be measured at the pressure point
(Fig. 4)-(Ref. B) after removing the sealing screw (Ref. A). Use a
flexible pipe, connect a gauge e.g. a liquid gauge that is
accurate to 0.1 mbar) to the pressure point (and measure the
intake pressure whilst the appliance is operating. If the pressure
reading does not fall within the upper and lower limits indicated
on the table, the appliance cannot be installed.
A Nozzle fixing nut
B Nozzle
C Primary air supply adjusting bush
D Bush locking bolt
- Open door or doors.
- Remove oil collection trays.
- Loosen nozzles (ref. B) and replace them with
nozzles that are suitable for the gas specified on
the rating plate
The nozzles are marked in hundredths of a millimeter.
Pag. 14
(Fig. 3).