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Mexico Super RS485 - RS4125 -
Installation & Servicing
GENERAL
Me
x 1920
RS 4100
RS 485
RS 4125
RS 4100 & RS 4125
Dotted lines indicate
flow rates equivalent
to a temperature rise
of 11
o
C (20
o
F)
Water Flow Rate and Pressure Loss
2.
If the boiler is to be installed in a cupboard or compartment,
permanent air vents are required (for cooling purposes) in
the cupboard/compartment, at both high and low levels. The
air vents must either communicate with room/internal space,
or be direct to outside air. The minimum effective areas of the
permanent air vents, required in the cupboard/compartment,
are specified in Table 4 and are related to maximum rated
heat input.
3.
Both air vents MUST communicate with the same room or
internal space or MUST be on the same wall to outside air.
4.
In siting the air vents care must be taken to avoid the freezing
of pipework.
WATER CIRCULATION SYSTEM
The boiler must NOT be used for direct hot water supply. 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 resistance of the boilers at
maximum output
with 11ºC
(20ºF) temperature differentials are shown in the graph below.
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
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.
If required, a drain tap (not supplied) may be fitted to an unused
bottom (1" BSP) tapping on the front of the boiler.
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.
Boiler
Air from room/internal
Air direct from
space cm
2
(in.
2
)
outside cm
2
(in.
2
)
High level
Low level
High level
Low level
RS485
275 (43)
275 (43)
137 (21)
137 (21)
RS4100
438 (68)
438 (68)
219 (34)
219 (34)
RS4125
438 (68)
438 (68)
219 (34)
219 (34)
Table 4 - High and low vent areas
200942-1.p65
3/4/2004, 9:24 AM
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