IDEAL British Gas 100 RD2, Руководство по установке и обслуживанию

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British Gas 100 & 125 RD2 -
Installation & Servicing
GENERAL
100 &
125
FLOW RATE (gals/hr.)
FLOW RATE (l/min.)
PRESSURE LOSS (mbar)
PRESSURE LOSS (ft. water)
140
60
5.0
4.0
3.0
2.0
1.0
Mex 1341 -1
100
20
200 400 600
125
100
10 20 30 40 50
WATER CIRCULATION SYSTEM
The boiler must NOT be used for direct hot water supply or for
sealed systems. The boiler is suitable for connection to pumped
open vent central heating systems, pumped central heating
combined with pumped or gravity indirect domestic hot water
supply systems.
The boiler is NOT suitable for gravity heating systems. The
hydraulic resistances of the boilers at
maximum output with 11
o
C
(20
o
F) temperature differentials are shown in the graph below.
Maximum boiler operating temperature should be 82
O
C (180
O
F).
The central heating system should be in accordance with
BS. 6798 and, in addition, for smallbore and microbore
systems, BS. 5449:1.
The domestic hot water system, if applicable, should be in
accordance with the relevant recommendations of BS. 5546.
Copper tubing to BS. 2871:1 is recommended for water carrying
pipework.
The hot water storage cylinder MUST be of the indirect type and
should preferably be manufactured of copper.
Single feed, indirect cylinders are not recommended and MUST
NOT be used on sealed systems.
The hot water cylinder and ancillary pipework not forming part of
the useful heating surface should be lagged to prevent heat loss
and any possible freezing - particularly where pipes run through
roof spaces and ventilated underfloor spaces.
IMPORTANT
The boiler must be vented. If venting cannot be done via a flow
connection a separate vent MUST be fitted by the installer.
Draining taps MUST be located in accessible positions, which
permit the draining of the whole system - including the boiler and
hot water storage vessel. They should be at least
1/2" BSP
nominal size and be in accordance with BS. 2879.
If required, a drain tap (not supplied) may be fitted to an unused
bottom (1" BSP) tapping on the front of the boiler.
Dotted lines indicate flow rates equivalent
to a temperature rise of 11
o
C (20
o
F)
Water Flow Rate and Pressure Loss
WATER TREATMENT
The British Gas RD2 incorporates a cast iron heat
exchanger. As part of the installation the central heating
system should be thoroughly flushed with appropriate
water treatment in order to comply with BS7593:1992
British Gas recommend the use of Fernox or Betz
Dearborn water treatment products which must be used in
accordance with the manufacturers instructions. For
further information contact :
Fernox Manufacturing. Co. Ltd. , Tandem House,
Marlowe Way, Croydon, Surrey CRO 4XS,
tel. 0870 5601 5000
or
Betz Dearborn Ltd. , Widnes, Cheshire,
tel. 0151 424 5351
IMPORTANT.
ANY OTHER TREATMENT FOR THIS
PRODUCT MAY RENDER THE GUARANTEE OF
BRITISH GAS
INVALID.
Notes.
1.
If an inhibitor is used, and in hard water areas where
treatment to prevent lime deposits is necessary, it is
most important that the water treatment MUST be
maintained at the correct concentrations recommended
by the treatment manufacturer.
2. Artificially softened water must not be used in the
system, under any circumstances.
THERMOSTATIC RADIATOR VALVES
British Gas recommend that heating systems utilising full
thermostatic radiator valve control of temperature in individual
rooms should also be fitted with a room thermostat controlling
the temperature in a space served by radiators not fitted with
such a valve, as stated in BS. 5449.
When thermostatic radiator valves are used, the space heating
temperature control over a living / dining area or hallway having
a heating requirement of at least 10% of the boiler heat output
should be achieved using a room thermostat, whilst other rooms
are individually controlled by thermostatic radiator valves.
However, if the system employs thermostatic radiator valves on
all radiators or two port valves without end switches then a
bypass must be fitted in order to ensure a flow of water should
all the valves be in the closed position.
ELECTRICAL SUPPLY
WARNING. The appliance MUST be efficiently earthed.
Wiring external to the appliance MUST be in accordance with
the current I.E.E. (BS 7671) Wiring Regulations and any local
regulations which apply.
The boiler is supplied for 230 V ~ 50 Hz single phase. The fuse
rating is 3A.
Connection must be made in a way that allows complete
isolation of the electrical supply - such as a double pole switch,
having a 3mm (
1/8
") contact separation in both poles, or a plug
and socket serving only the boiler and system controls.
The means of isolation must be accessible to the user after
installation.
For bathroom installations the point of connection to the mains
must be situated outside the bathroom.