Gas Connections - Potterton iHE 100/300 Installation And Servicing Instructions

GAS CONNECTIONS

G S
AS UPPLY
A manual valve for isolation of the gas supply to
the boiler should be installed nearby and it should
be clearly identifi ed and readily accessible for use
at all times.
The installation of the gas supply must conform, to
the British Standards and Codes of Practice listed
in Section 1 of this manual.
The appliance should be fi tted with a gas isolating
cock, a supply pipe of 1" Steel pipework and can
be supplied from any direction.
The gas supply pipework must be fi tted with suit-
able unions so the Heater can be safely removed
for major service or repair.
N G
ATURAL AS
The gas meter, regulator and supply pipework
must be sized so as to provide an adequate supply
to the Heater in addition to any other appliances
connected to the supply. (See Technical Data
on the inside cover for Pressure and Flow Rate
requirements.)
Where the Boiler is installed in a plant room or pur-
pose built compartment, a manually operated valve
must be fi tted in accordance with the Gas Safety
(Installation and Use) Regulations. The valve must
be easily identifi ed and readily accessible.
iHE
G C
AS ONNECTION
The 1" Galvanised steel gas connection is provided
at the top of the Heater. A minimum of 20mb (G20)
running pressure, must be available at the appliance
inlet, with the Heater and other connected appliances
fi ring.
This will require a test point on the
supply to the appliance, the gas valve inlet
pressure tapping should not be used,
whilst the appliance is being operated, as
this will give a false reading.
Check for gas tightness (BS. 6891) in pipework to
the appliance by connecting a manometer to the
inlet pressure tapping point.(See Fig. 4.1) Gas and
combustion soundness within the Heater should be
checked using sense of smell and leak detection fl uid.
Ensure gas tightness before moving onto to commis-
sioning the aplliance.
Inlet pressure tapping
measurement point
17
Fig. 4.1