Gas Connections - Potterton iHE 100 Installation & Servicing Instructions Manual

2.15 GAS CONNECTIONS

G S
AS UPPLY
A manual valve for isolation of the gas supply to
the appliance 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 appliance in addition to any other appliances
connected to the supply. (See Technical Data on
the inside cover for Pressure and Flow Rate require-
ments.)
Where this appliance is installed in a plant room or
purpose 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 appliance. A minimum of 20mb (G20)
running pressure, must be available at the appliance
inlet, with this appliance and other connected appli-
ances operating
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 may give an incorrect reading.
Check for gas tightness (BS. 6891) in pipework to the
appliance by connecting a manometer to the inlet pres-
sure tapping point.(See Fig. 4.1) Gas and combustion
soundness within the appliance should be checked us-
ing sense of smell and leak detection fl uid. Ensure gas
tightness before moving onto to commissioning.
Inlet pressure tapping
measurement point
17
Fig. 4.1
GB/IE