Gas Connection - BENSON RS UHA Assembly And Use Manual

Connection of the heater to the gas supply, whether Natural gas LPG, must be carried in compliance with the installation
laws and by qualified personnel. The warm air heater is set to work with (G20) Natural Gas.
A (G31) propane conversion kit is also available.
Before connecting up it is necessary to make sure that:

The correct type of gas is that for which the equipment has been set up is available.

The gas pipes are clean and free of debris.

The gas supply and meter are capable of delivering the required volume of gas to ensure the correct burner
pressure can be achieved. See TECHNICAL DATA.

The diameter of the pipework from the isolating cock to the burner must not be less than the diameter of the
connection into the multiblock.
An approved gas jointing compound must be used on all joints and unions and the system purged and
tested for soundness prior to final connection
1. Threaded Gas pipe connector Male1/2" bsp
thread on the type 1 ÷ 4 heaters and 3/4" BSP on
the type 5 ÷ 7 heater
2. Pressure stabiliser
correct pressure of combustible gas).
*
3. Filter (required to prevent impurities which may
be present in the gas line from entering the
equipment and also to permit simple inspection
and maintenance).
*
4. Isolating Cock
fitted with a separate isolating cock positioned
adjacent to and upstream of the union which
must be sited outside the heater.
5. Gas Pipe
*
( ) Customer supply
WARNING!
When a LPG supply is used it is advisable to install a
first pressure reducer close to the liquid gas tank to
reduce the pressure to 1.5 bars and a second pressure
reducer near to the heater installation to bring the
pressure down from 1.5 bars to 40 mbar.
A third reducer (see position 2) mounted in proximity to
the equipment ensures the correct pressure is provided.
Installers should satisfy themselves that the gas pipework installation is carried out in accordance with all
current legislation, Codes of Practice and recommendations .
Additionally it may be necessary to protect the gas valves which form part of the heater or burner assembly
from potential pipe contamination particularly, but not exclusively , where copper gas pipework is used.
In instances where copper pipework is to be used for all or part of a gas pipework installation, including
short length final connections then we advise that installers consult with gas supplier or provider and
satisfy themselves what additional precautions may be necessary

GAS CONNECTION

*
(required to ensure the
each heater supply must be
IMPORTANT NOTICE TO INSTALLERS
Note
Reference to
publications Utilisation
IGE/UP2 together with reference to BS6891 is strongly
advised.
To prevent any problems which could arise due to a
loss of pressure it is advisable to install a minimum
pressure switch to shut down the heater in the event of
gas pressure failure.
WARNING
22
The Institute of Gas
Procedures IGE/UP1
Engineers
and