Issue 2 14/07/16
23
Installation
3
The installation of the gas supply must conform, depending on
its size, to the requirements of British Standards and Codes of
Practice listed in Section 1 of this manual.
A gas meter will be connected to the service pipe by British Gas
plc or its authorised contractor.
The meter and service pipe should be checked by British Gas,
or its authorised contractor, to ensure that they are adequate to
deal with the gas supply to the water heater(s) in addition to any
existing or additional requirements.
Fit the service gas cock (supplied) to the gas connection on top
of the water heater using a suitable jointing compound and
connect to the gas supply.
The water heater is not intended for operation at higher than
35mbar (14.0 in wg) supply gas pressure. Higher gas supply
pressures require supplemental reducing service regulator.
Exposure to higher gas supply pressure may cause damage to
the gas controls, which could result in fire or explosion. If
overpressure has occurred, such as improper testing of gas
lines or emergency malfunction of the supply system, the gas
valve must be checked for safe operation.
Where the water heater(s) is (are) installed in a water heater
house or purpose built compartment, a manually operated valve
for the water heater house must be fitted in accordance with the
Gas Safety (Installation and Use) Regulations 1998. The valve
must be easily identified and readily accessible.
After installation, the system should be pressure tested for
soundness and purged in accordance with BS 6891 or IM/2 and
IM/5 as appropriate.
Contact Calor Gas who will provide the appropriate type and
size of LPG supply vessel and ensure its safe location and
installation.
The installation of the gas supply must conform to LPGA Code
of Practice, 22 LPG Piping Systems: Design and Installation,
plus the requirements of British Standards and Codes of
Practice listed in Section 1 of this manual.
Andrews Water Heaters are unregulated and a second stage
regulator must be installed to give an inlet pressure to the
appliance as follows:
3.22 Gas supply - Natural gas
3.23 Gas supply - Propane
