BENSON VRA 065 - 8 Gas; 8-1 Gas Conversion

WARNING : Disconnect Electric and Gas supply before carrying out the above procedure
8-1 Gas conversion
The Benson Variante Range are equipped with an atmospheric multi injector type burner for natural or
propane gas.
It is a requirement that only qualified and competent personnel may undertake installation,
To convert burner for operation on either Natural or Propane Gas
1– Isolate the Electrical and Gas supplies
2– Open the door and disconnect the gas pipe from the regulator (Fig1 ) and undo the screws (Fig.2) that
secure the burner bar assembly into the heater and remove.
3 - Undo the screws (Fig 3) and remove burner bar from the assembly.
4 - Select the correct nozzles for either Natural or Propane gas (see table below).
5 - Replace the injectors (Fig 4) ensuring that the seals (Fig 5) are also replaced .
6- Reassemble the burner bar onto the burner assembly using new gaskets (Fig 6)
7 –Refit the burner assembly to the heater and reconnect the gas valve ensuring a good seal on all joints.
8– GAS
Settings for Natural Gas G20 Settings for Propane G31
Pressure
Regulator
No Nozzles
and Size
Air Disc
size
Pressure
Regulator
No Nozzles
and Size
Air Disc
size
065
9 mbar 5 x AL 1.90 40 25 mbar 5 x AL 1.10 40
090
9 mbar 5 x AL 2.20 27 25 mbar 5 x AL 1.30 27
110
9 mbar 6 x AL 2.20 30 25 mbar 6 x AL 1.30 30
140
9 mbar 8 x AL 2.20 No Disc 25 mbar 8 x AL 1.30 No Disc
170
9 mbar 10 x AL 2.20 No Disc 25 mbar 10 x AL 1.30 No Disc
220
9 mbar 12 x AL 2.20 No Disc 25 mbar 12 x AL 1.30 No Disc
285
9 mbar 16 x AL 2.20 27 25 mbar 16 x AL 1.30 30
Types
4
5
3
3
6
6
Pressure regulator
1
Test Point
2