INSTALLATION
Mini
Installation & Servicing
29
33 GAS CONVERSION
1 Check that the gas cock fitted under the boiler is turned
off and the appliance is switched off at the mains isolating
spur.
2 Remove the front panel of the case.
3 Take off the lid of the sealed chamber.
4 Take the front panel of the combustion chamber off and
remove the burner as explained in frame 37.
5 Carry out the conversion for the type of gas, replacing the
burner injectors correctly as explained in frame 45.
6 Re---assemble the burner, the front panel of the
combustion chamber and the lid of the sealed chamber.
7 Switch on the appliance at the mains isolating spur.
8 Turn the boiler OFF positioning the main switch C as in
figure below.
C
A
D
E
B
Mini C24
Mini C28
Mini C32
Mini S24
Mini S28
9 Disconnect the CH temperature probe (30 on page 12).
10 Press and hold the reset button D for about 10 seconds
until the lock---out signal lamp E blinks.
11 Connect the CH temperature probe (30 on page 12).
12 Press the reset button D repeatedly (4 times) until the
lamps A give the follow indication:
Where:
Lamp ON
Lamp OFF
At this time it is possible to determine the current setting by
keeping the reset button D pressed for more than 5 seconds.
The lamps A will flash a number of times corresponding to the
setting of the knob B (see next figure).
B
NATURAL
4
L.P.G.
GAS
1
Gas type
Setting No.
Gas
supply
Position of
knob B
Approx. Max current through the
modulator device
Natural gas
1
125 mA
L.P.G.
4
165 mA
13 To change the setting turn the knob B to a position
corresponding to the gas used as shown in the figure
above.
By turning the control B, the lock---out signal lamp E
blinks quickly (2 per second) indicating that the setting
has changed and must be memorized.
14 To memorize the setting press and hold the reset button
D for about 5 seconds until the lamps A briefly blink
simultaneously.
15 Open the gas cock.
16 To reset the boiler to the normal operation turn it ON by
the main switch C on the desired operation and checking
the ignition pressure and that the burner lights up
uniformly.The boiler automatically resets to its normal
operation after 10 minutes if the above reset operation is
not performed.
The factory setting is Natural gas.
17 Calibrate the gas valve according to the instructions given
in this manual.
18 Set the correct gas pressure for central heating output
required.
19 Stick the self---adhesive label (included with the
conversion kit, indicating the type of gas, and the gas
pressures to which the appliance has been set) over the
existing label on the bottom of the control panel and
replace the adjustment protection cap.
20 Replace the front panels of the case.
21 Check the correct operation of the boiler.
34 HANDING OVER
After completing the installation and commissioning of the
system, the installer should hand over to the householder by
the following actions:
1 Hand the User’s Instructions to the householder and
explain his or her responsibilities under the Gas Safety
(Installation and Use) Regulations 1994 and amendments
1996 or rules in force.
2 Draw attention to the Lighting Instruction label affixed to
the inside of the lower front door.
3 Explain and demonstrate the lighting and shutting down
procedures.
4 The operation of the boiler and the use and adjustment of
ALL system controls should be fully explained to the
householder, to ensure the greatest possible fuel
economy consistent with household requirements of both
heating and hot water consumption.
5 Advise the user of the precautions necessary to prevent
damage to the system and to the building, in the event of
the system remaining inoperative during frosty conditions.
6 If a programmer is fitted, draw attention to the
Programmer Instructions and hand them to the
householder.
7 After installation and commissioning please complete the
Commissioning Checklist before handover to
the customer.
For IE, it is necessary to complete a “Declaration of
Conformity” to indicate compliance to I.S. 813:2002.
8 Stress the importance of regular servicing by a CORGI
registered installer and that a comprehensive service
should be carried out AT LEAST ONCE A YEAR.
In IE, servicing work must be carried out by a competent
person.
Emphasise to the user that the boiler may stop working if the
system pressure is lowered by draining radiators to
decorate behind them. In particular, explain to the user how
the domestic hot water temperature varies with flow rate.
This is especially important when water is drawn off while
the boiler is already running for central heating.
INST
ALLA
TION
