34
GAS CONVERSION
The heaters are supplied ready for use with (G20),Natural Gas as per the table below LPG Conversion kits are available
from the manufacturer:
Natural Gas (G20)
TYPE
1 2 3 4 5 6
Number
of
injectors
1 1 1 2 2 4 N°
Diameter
of
injectors
410 480 555 500 540 450
mm/100
Gas supply pressure
20 mBar
Head pressure max
13,0
13,0 13,0 10,0 13,0 10,5 mBar
Head pressure min
(two stage)
7,0 6,5 6,5 7,0 6,5 5,0 mBar
Before converting the heater to LPG ensure that the gas supply is isolated conversion should be carried out as described
in the following section .
INSTRUCTIONS FOR CONVERSION TO PROPANE (G31):
1. Change injectors
2. Adjust to the correct gas inlet pressure
3. Adjust to the correct head pressure
4. Fit primary air diaphram (if required)
5. Change adhesive label supplied with kit indicating correct gas type
6. Ensure settings are correct as per the manual and data plate.
CHANGE INJECTORS:
To change injectors:
Unscrew the natural gas injectors and replace them with the correct size injectors for propane as shown in the table
below:
Propane Gas (G31)
TYPE
1 2 3 4 5 6
Number
of
injectors
1 1 1 2 2 4 N°
Diameter
of
injectors
250 280 335 285 320 255
mm/100
Butane Gas (G30)
TYPE
1 2 3 4 5 6
Number
of
injectors
1 1 1 2 2 4 N°
Diameter
of
injectors
250 280 335 285 320 255
mm/100
Replacing injectors single manifold
(type 1-2-3-5)
Replacing injectors twin manifold
(type 4-6)
Check the size stamped on the side of the
injector is correct to the data in the manual.
Ensure that the new injectors are correctly fitted
in the manifold and are gas tight. When the
conversion is complete afix the adhesive label
supplied with the kit indicating the correct gas
pressure on to the manifold covering the existing
label completely test for gas soundness on
completion.
Ensure that the aluminium washers supplied for
types (5–7) are fitted when changing the
injectors.
