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Mexico Super FF440 - FF480 -
Installation & Servicing
INSTALLATION
50 FROST PROTECTION
Diagram A
shows a double pole frost thermostat, which
should suffice for all systems which do not use the OFF
terminals of the programmer.
Diagram B
shows a 'change-over' frost thermostat, which will
cover most systems which do use CH OFF. If, however, on
such a system the HW pipework is in an isolated part of the
house, a second frost thermostat may be used to protect it.
If in doubt, ask your installer for advice.
51 FITTING THE CASING
7.
Insert the thermostat phial and phial retaining clip
into the thermostat pocket. Take care not to kink the
thermostat capillary as it is unwound and secure it
with the split pin as shown.
8.
Refit the in-line electrical connector between the
control box and the PCB box.
9.
Refit the grille assembly
Central heating systems fitted wholly inside the house
do not normally require frost protection as the house
acts as a 'storage heater' and can normally be left at
least 24 hrs. without frost damage. However, if parts of
the pipework run outside the house or if the boiler will
be left off for more than a day or so then a frost 'stat
should be wired into the system.
This is usually done at the programmer, in which case
the programme selector switches are set to OFF and
all other controls MUST be left in the running position.
The frost 'stat should be sited in a cold place but
where it can sense heat from the system.
Wiring should be as shown, with minimal disturbance
to other wiring of the programmer.
Designation of the terminals will vary, but the
programmer and thermostat manufacturer's leaflets
will give full details.
1.
Offer up the RH side panel, locating it with the
peg in the baseplate, and push the panel back
engaging it into the collector hood tab.
2.
Secure the panel to the baseplate and turret
front panel.
3.
Repeat steps 1 and 2 to refit the LH side
panel.
4.
Place the top panel and push back.
5.
Secure the top panel to the side panels.
IMPORTANT.
Wiring within the boiler casing must
be neatly secured with the cable straps provided
and MUST NOT be allowed to touch the fan
cooling impellor, the burner front plate, or the
cleanout cover and the collector hood.
6.
Replace the control box cover and refit the
control panel using the screws previously
removed.
INST
ALLA
TION
200939-1.p65
3/1/2004, 4:33 PM
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