HAMWORTHY HEATING LTD
WESSEX-HE 200 BOILER
500001008/K
4
4.0 LOCATION
(Refer to Figure Nos. 9 & 11 and section 10.1 for
dimensions and clearances).
The location chosen for the boiler must permit the
provision of a satisfactory flue system and an
adequate air supply. The location must also provide
adequate space for servicing and air circulation
around each unit.
The boiler must be installed on a level non-
combustible surface that is capable of adequately
supporting its weight (when filled with water, see
Table 2.2) and any ancillary equipment.
Any combustible material adjacent to the boiler and
the flue system must be so placed or shielded as to
ensure that its temperature does not exceed 65
o
C.
Further details regarding boiler location are given in
BS6644
.
5.0 GAS SUPPLY
5.1 Service Pipes
The local Gas Region must be consulted at the
installation planning stage in order to establish the
availability of an adequate supply of gas.
5.2 Meters
A new gas meter will be connected to the service pipe
by the local gas region, or a local gas region
contractor.
An existing meter should be checked, preferably by
the gas region, to ensure that it is adequate to deal
with the rate of gas supply required.
5.3 Gas Supply Pipes
Supply pipes must be fitted in accordance with
BS
6891
or
UP/2
as appropriate. Pipework from the
meter to the boiler must be of adequate size. Do not
use pipes of a smaller size than the boiler gas
connection. The complete installation must be purged
and tested for soundness as described in
BS 6891
or
UP/1
and
UP/1A
as appropriate.
5.4 Boosted Supplies
Where it is necessary to employ a gas pressure
booster, the controls must include a low-pressure cut-
off switch at the booster inlet. The local gas region
must be consulted before a gas pressure booster is
fitted.
5.5 Boiler House Control Valve
A manual valve for boiler house isolation shall be
fitted in the gas supply line. It shall be clearly
identified and readily accessible for operation.
5.6 Boiler Gas System Leak Check
Although the boiler receives a gas leak check and gas
train component integrity check prior to leaving the
factory, transport and installation may cause
disturbance to unions, fittings and gas valve
assemblies etc. and during commissioning a further
test for soundness should be carried out on the boiler
gas pipework and components. A procedure guide
follows with reference to Figure No. 1.
To Check Valve D.
1) Turn off the electrical power supply to the
appliance and close all valves.
2) Connect the manometer to TP1 on either of the
main valves A or B (see Figure No. 1).
3) With A, B & C closed, open E and "Crack Open" D
to produce 5 mbar on manometer.
