8
Mexico Super CF 3/60P - 3/140P -
Installation
GENERAL
Water Flow Rate and Pressure Loss
Boiler
Air from room/internal Air direct from outside
space
cm
2
(in.
2
)
cm
2
(in.
2
)
High Level Low Level High level Low Level
CF 3/60P
211(33)
422 (66)
106 (17)
211 (33)
CF 3/75P
264 (41)
528 (82)
132 (21)
264 (41)
CF 3/100P
333 (52)
666 (100)
167 (26)
333 (52)
CF 3/125P
420 (65)
840 (130)
210 (33)
420 (65)
CF 3/140P
495 (77)
990 (154)
248 (39)
495 (77)
Table 4 - High and low vent areas
EFFECT OF AN EXTRACTOR FAN
If there is any type of extractor fan fitted in the premises there is
a possibility that, if an adequate air inlet area from outside is
not provided, spillage of the boiler flue products could occur
when the fan is in operation. Where such installations occur a
spillage test, as detailed in BS.5440:1, MUST be carried out
and any necessary action taken.
VENTILATION IN SERIES
In installations requiring 2 ventilators to be fitted in series, e.g.
across a cavity wall, EACH ventilator should be sized in
accordance with the above data. Where there are more than 2
ventilators in series, EACH should have an area of 50% in
excess of the value quoted above.
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 and gravity or pumped indirect domestic hot water
supply systems.
The boiler is NOT suitable for gravity heating systems.
The hydraulic resistances of the boiler at
maximum output
with
11
0
C (20
0
F) temperature differentials are shown in the
following graph:
Dotted lines indicate flow rates equivalent to a temperature rise
of 11
0
C (20
0
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.
THERMOSTATIC RADIATOR VALVES
Caradon Plumbing Ltd.
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 ~ 50Hz single phase.
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 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 accessible to the user after installation.
Summary of Contents for 4134899
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