Strebel S-FX 125, Installation Operating & Maintenance Manual

Page: 15 / 68

15
6.2 Gas Connection
Before making the connection, make sure the S-FX applaince can operate with the type of fuel
available. Clean all the pipes of the gas system to remove any residues that could affect correct
functioning of the boiler.
Connection of the S-FX appliance to the fuel supply must comply with current installation standards.
To allow easy opening of the burner door during annual service / maintenance, the last section of the gas pipe must
be considered. See chapter 15.2 which shows how the burner door is opened and closed.
As per the above picture, the red arrow shows where the gas connection to the boiler is located. The burner door
hinge is located directly below thus the gas connection on the S-FX boiler is attached to the fan which is attached to
the burner door that is a moveable part. For the burner door to be opened, the gas pipe connecting into the gas
connection on the boiler will need to be removed. Therefore it is suggested that either:
•
The last section is a stainless steel hose with an isolation valve fitted
– gas pipe example above.
•
The last section of gas pipe work has breakable unions with an isolation valve fitted.
S-FX
S-FX 70 S-FX 125 S-FX 220 S-FX 320
Gas Supply Connection Size ¾" 1" 1" 1" Ø
Make sure that all gas connections are tight. The capacity of the gas meter must be sufficient for the simultaneous
use of all units connected to it. The diameter of the gas pipe leaving the boiler is not decisive for choosing the
diameter of the pipe between the S-FX unit and the gas meter. It must be chosen according to its length and
pressure drop, in conformity with the current regulations.
Do not use the gas pipes to earth eletrical appliances.
In case of connection in cascade, make sure to install a fuel shut off valve externally with respect to
the modules.