14
INSTALLATION
Mexico Super CF445 - CF475 -
Installation & Servicing
11 PREPARING THE BOILER
Note
.
Before placing the boiler in the selected position any
gas and water connections at the rear of the boiler
should be prepared, due to the possible lack of
access.
1.
Screw the distributor tube (supplied with a 1" BSP x
28mm copper adaptor) into the selected heating
return tapping, using an appropriate jointing
material.
It is
IMPERATIVE
that the INDEX MARK on the
distributor bush is in alignment with the mark on
the section boss, as shown in Frame 7.
DO NOT disturb it when connecting subsequent
pipework.
Fully pumped systems using more than 1 pump,
serving separate zones, must have a common
return connection to the distributor tube.
2.
Select the desired pumped flow tapping.
3.
Screw the supplied boiler thermostat pocket into
the appropriate front section tapping, using an
approved jointing material. Refer to Tables 6 and 7.
4.
Connect pipe fittings to the rear tappings and plug
any unused tappings.
Note
.
If using iron elbows fit
a short straight connector into the boiler tapping
first, to clear the casing when fitted.
5.
Place the boiler in position.
Note
.
The pump may
be fitted on the FLOW or RETURN.
Table 6 - Fully Pumped Systems
Connections - as viewed at front
Thermostat position
Back Section
Front Section
Flow
Return
Top
LH
LH
LH
LH
RH
LH
RH
RH
RH
RH
LH
RH
12 GAS CONNECTION
1.
A MINIMUM working gas
pressure of 20 mbar (8
in.w.g.) MUST be available
at the boiler inlet, with the
boiler operating.
2.
Extend a gas supply pipe to
the boiler (for size refer to
Table 1, page 2) and
connect to the gas cock
situated at the front LH side
of the boiler.
3.
Test the gas installation for
soundness and purge in
accordance with BS.6891:
1988. Refer to Frame 25.
410 (16
1/8
")
440 (17
3/8")
850 (33
1/2"
)
Gas conn
Gas conn
28
(1
1/8"
)
All dimensions in mm
MEX 2233
256 (10")
Table 7 - Gravity Domestic Hot Water & Pumped Central Heating
Connections - as viewed at front
Thermostat Position
Back Section
Front Section
CH
DHW
Flow
Return
Flow
Return
Top
LH
LH
RH
RH
LH
LH
RH
RH
LH
LH
RH
RH
LH
LH
RH
RH
LH
LH
RH
RH
INST
ALLA
TION
200943-1.p65
3/4/2004, 1:58 PM
14