21
Mexico Super FF440 - FF480 -
Installation & Servicing
INSTALLATION
21
2.
Ensure that all valves are open. Fill and vent the system
and check for water soundness.
Notes.
a.
Isolating valves must be fitted as close to the pump as
possible.
b.
The boiler is not suitable for a sealed system unless the
overheat thermostat kit is installed.
c.
The boiler is not suitable for use with a direct hot water
cylinder.
40 WATER CONNECTIONS
1.
Connect the system flow and return pipework to the
boiler as appropriate. Refer to Frames 41 and 42 for
guidance on system design.
Note.
When the required output exceeds 14.4 kW
(49 000 Btu/h) then 28mm (1") pumped flow and return
pipes should be used, both to and from the boiler.
Gravity connections MUST be at least 28mm (1").
39 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 NOT LESS THAN 15mm
(
1/2
") OD to the boiler and connect to the gas cock
situated at the front LH side of the boiler.
38 TERMINAL WALL PLATE
This plate allows neat concealment and full compression of the rubber
seal. Its use is not essential if the flue hole and flue ducts have been
accurately cut and the outside wall face is flat.
1.
Position the terminal wall plate over the terminal.
2.
Mark and drill 4 fixing holes with an 7mm (9/32") masonry drill.
3.
Insert the 4 plastic plugs provided.
4.
Secure the plate with 4 of the No.10 x 2" screws provided.
Note.
If the terminal is less than 2m (6' 6") above ground level, an approved
terminal guard should be fitted. Refer to the Contents List on Page 3.
Boiler
Dimension A
FF440
327 (12
7/8
")
FF450 - FF480
400 (15
3/4
")
3.
Test the gas installation for soundness and purge in
accordance with BS.6891: 1988. Refer to Frame 52.
INST
ALLA
TION
200939-1.p65
3/1/2004, 4:33 PM
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