User manual
7
External (room) thermostat control
If an external (room) thermostat is installed, it is recommended
that the temperature of the Centr
al Heating system be set by
means of the knob “C”, leaving it at max in order to obtain the
best performance from the boiler and to allow the regulation of the
room temperature to function efficiently.
Setting the hot water for domestic use (MFFI only)
Both in the winter and summer mode, the temperature of the
Domestic Hot W
ater may be adjusted by using knob “E”. A deliv-
ery temperature for the water may be chosen in a range from 36˚C
to about 56˚C, depending on the flow rate of the water and the
position of the knob between the min. and max. settings.
To increase water temperature, turn knob “E” to max. and reduce
the water flow rate at the tap.
The water temper
ature in the primary circuit is shown on the
display.
Comfort Function (MFFI only)
The supply of water for domestic use can become more conven-
ient by means of the “COMFORT” function, which maintains the
secondary exchanger at a preset temperature when the boiler is
not running;
thereby allowing a quicker delivery of domestic water
when required. This function is activated by pressing
the button on the control panel. When the function is on, a
yellow L.E.D. “G” on the control panel will illuminate.
C
C
E
M
N
Adjusting the heating
It is possible to set the temperature of the Central Heating system
b
y adjusting the knob “C”. By positioning the indicator some-
where between 1 and 6, a temper
ature may be obtained which
varies from approximately 38˚C to about 82˚C.
The water temperature in the primary circuit is shown on the dis-
play.
Start-up Procedure
Before starting the boiler, check the following:
- The w
ater pressure on the pressure gauge “F” is between 1 and
1.5 bar;
- That the external gas cock “M” and “N” and the inlet for domestic
water are open.
T
hese models are equipped with electronic ignition (there is no pilot
light).
To switch the boiler on, push the button. Turn the knob “C” to
the summer “ ” or winter position; a centralised electronic control
unit will automatically light the main bur
ner when needed without any
intervention from the outside (green LED “A” will illuminate when the
burner is on).
If the burner does not light within the pre-set safety time limit, the dis-
play will show an error code and the red LED “H” will illuminate.
To reset the ignition system, the reset button must be pressed.
Should the system fail to light a second time, check to make sure that
the gas cock is open. If the problem persists, contact the Customer
Service Helpline.
Winter and Summer Operating Modes
In the “Winter” operating mode, the boiler will produce both
Central Heating and Domestic Hot
Water. In the “Summer” oper-
ating mode, the boiler will produce only Domestic Hot Water.
Using the knob on the control panel, the user can select “winter”
or
“summer” operating mode. Keeping the knob “C” at the “ ”
position selects the “summer” operating mode.
“Winter” operating
mode may be selected by positioning the knob “C” between the
min. and max. settings.
Note: The “Summer” mode is only available f
or MFFI models.
summer
winter
C
C
H
A
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com
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