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14
GAS CIRCUIT
Connect the gas with the threaded connection using a rigid
connector that can be disassembled.
Verify the seal that must be in compliance with the norms for gas
installations.
For installation with Lpg it is necessary to use a pressure reducer
(first stage) in proximity of the tank, in order to reduce the pressure
to 1,5 bars. In proximity of every generator must be used a pressure
reducer (second stage) in order to reduce the pressure to 29/37 to
mbarr.
GAS REGULATION
The product is factory adjusted as mentioned below and on the
packing.
Methane or H or G20
• inlet pressure: 20 mbar
• Burner pressure as below
LPG or methane propane or G30/31
• inlet pressure: 29/37mbar
• Burner pressure as below
NOZZLES SCHEME-FLOW-PRESSURE
METHANE
Model
220
Thermal power
kW
30
Ø nozzle
mm 1,30
Nozzle pressure
mbar 11,40
Methane pressure
on
regulator
LPG
Model
220
Ø nozzle
mm
0,72
Inlet pressure LPG
29/37
mbar
LPG pressure
off
regulator
In order to verify the pressure to the burner, insert the tube of a
water column gauge in the connection B, after to have removed the
closing screw.
A
Fig. 21
APRIL 2009 Issue (Italy)
300
400
500
34
34
34
1,30
1,30
1,30
13,80
13,80
13,80
on
on
on
300
400
500
0,75
0,75
0,75
29/37
29/37
29/37
off
off
off
RP
Burner calibration pressure with methane
While the product is in function, use a screw driver to turn the screw
RP to obtain the pressure as below.
Stop the burner and switch on it after some seconds.
Burner calibration with LPG
In this case the pressure regulator is excluded, the screw RP must
strongly be screwed. The pressure that arrives to the burner is the
boost pressure as for the European norm EN 437 the pressure of gas
valve depends from the gas in the bottle G 30 pure butane 29 mbar,
G 31 pure propane 37 mbar d of gas.
ATTENTION
As soon as the operation is finished please verify:
1. Electrical isolation
2. Gas seal
3. Closing of A and B screws
4. That product works properly
15
GAS CHANGEMENT
To change the kind of gas use the kit supplied from the producer;
this operation must be made from professional staff.
800
34
1,30
13,80
A
on
800
0,75
Fig. 22
29/37
Modification from methane to LPG
off
1. Verify that diameter of the injector supplied in the kit corresponds
to the model for LPG.
2. Close the gas interception tap and switch off the electricity.
3. Remove the burner unscrewing the fixing bolts A and remove
the front support B, unscrew before the gas tube and disconnect
the cables of the electrodes.
4. Unscrew the injectors C and replace them with the units inside
the kit.
5. Exclude the pressure regulator of the gas valve screwing the RP screw.
6. Switch on the generator and verify that inlet pressure from the
B
valve A is right for the kind of Lpg used (see the scheme).
7. Place the new label on the body to indicate a different gas.
8. Verify with special spray the gas seal on the threads, gaskets.
ATTENTION
If the product is used with Lpg it's necessary to use a pressure
reducer "first stage" near the tank to reduce the pressure up to
1,5 bar. Install near the product a second pressure reducer "second
stage" to reduce the feed pressure to 29 mbar (pure butane G 30)
or 37 mbar (pure propane G31).
14
B
C
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