Ideal Boilers Mexico Slimline RS 445, Installation & Servicing Manual, Page: 7 / 36

GENERAL
7
Mexico Slimline RS445 -
Installation & Servicing
The resistance with an 11
o
C temperature difference will be
approximately 2 in.w.g. (5 mbar).
The central heating system should be in accordance with
BS. 6798 and, in addition, with BS. 5449:1 for smallbore and
microbore systems.
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.
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.
The flow and return connections to a fully pumped system may
be made either at one side of the boiler or diagonally, to suit
convenience. In a combined pumped heating and gravity
domestic hot water system the gravity flow and return
connections must be made to the same side of the boiler and
the pumped connections to the opposite side.
IMPORTANT
A minimum length of 2 metres of copper pipe MUST be fitted to
both flow and return connections from the boiler before
connection to any plastic piping.
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.
WATER TREATMENT
These boilers incorporate a cast iron heat exchanger.
IMPORTANT. The application of any other treatment to this
product may render the guarantee of Caradon Ideal Limited
INVALID.
Caradon Ideal Limited recommend Water Treatment in
accordance with the
Benchmark Guidance Notes on Water
Treatment in Central Heating Systems.
WATER CIRCULATION SYSTEM
The boiler must NOT be used for direct hot water supply.
The following indirect open vented systems are suitable:
!
Combined gravity domestic hot water (DHW) and pumped
central heating (CH)
!
Combined pumped gravity domestic hot water and pumped
central heating.
!
Pumped central heating only.
!
Gravity domestic hot water only, up to a minimum domestic
hot water cylinder storage capacity of 180 litres (40 gal.)
Caradon Ideal Limited recommend the use of Fernox, GE Betz
Sentinel or Salamander water treatment products, which must
be used on accordance with the manufacturers instructions.
For further information contact:
Fernox Manufacturing Co. Ltd, Cookson Electronics,
Forsyth Road, Sheerwater, Woking, Surrey.
GU21 5RZ. Tel. +44 (0) 1799 521133
or
G E Betz Ltd, Sentinel Division, Foundry Lane, Widnes,
Cheshire, WA8 8UD.
Tel. +44 (0) 151 424 5351
or
Salamander Engineering Ltd, Unit 24, Reddicap Trading Estate,
Sutton Coldfield, West Midlands B75 7BU.
Tel. +44 (0) 121 378 0952
Notes.
1. It is most important that the correct concentration of the
water treatment products is maintained in accordance with
the manufacturers' instructions.
2. If the boiler is installed in an existing system any unsuitable
additives MUST be removed by thorough cleansing.
BS7593:1992 details the steps necessary to clean a
domestic heating system.
3. In hard water areas, treatment to prevent limescale may be
necessary - however the use of artificially softened water is
NOT permitted.
4. Under no circumstances should the boiler be fired before
the system has been thoroughly flushed.
BOILER CONTROL INTERLOCKS
Caradon Ideal Limited 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.
Central heating systems controls should be installed to ensure the
boiler is switched off when there is no demand for heating or hot water.
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 circuit
must be fitted with an automatic bypass valve to ensure a flow of
water should all 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. For Ireland reference should be made
to the current ETCI rules for electrical installations.
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.
Table 5 - Water Flow Rate and Pressure Loss
Boiler size RS 445
Boiler output kW 13.2
Btu/h 45 000
Water Flow l/sec 0.29
gpm 3.8
Pressure kPa 0.34
Loss m 0.034
ft 0.13
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