Ferroli Modena 80 E Manuel D’Utilisation

MODENA 80 E

24

5.04 Adjusting maximum output for central heating system (fig. 33)

This adjustment must be carried out electronically using the “P3” adjustment screw starting with a cold central
heating system. Connect a pressure gauge to the pressure test point downstream of the gas valve. Rotate the
temperature adjustment screw to maximum then regulate the pressure to the value required, consulting the diagram
(figs. 4 and 5) (page 8). Once this operation is complete, start up and shut down the burner two or three times using
the thermostat. Check each time that the pressure values remain as adjusted and that the burner ignites correctly.
Otherwise further adjustment is necessary until the pressure remains stable on this value.

N.B. - when carrying out this operation ensure that the boiler thermostat is set to maximum otherwise the
adjustment will not be accurate.

5.05 Adjusting central heating flow temperature

Central heating water temperature is adjusted by rotating the control knob (fig. 2 - part 63). Rotate the knob
clockwise to increase water temperature, anticlockwise to reduce water temperature. Temperature can be varied
from a minimum of 30

°

C to a maximum of 85

°

C. However, we recommend not operating the boiler below 50

°

C.

5.06 Adjusting room temperature (when a room thermostat is fitted)

Room temperature is controlled by positioning the room thermostat knob to the required value. The thermostat
automatically controls the boiler, temporarily interrupting the electrical supply subject to the room heat requirements.

5.07 Adjusting the central heating flow 

∆

t by varying pump flow-head

The thermal head 

∆

t (the difference in temperature between the delivery water and return water in the central

heating circuit) must be less than 20

°

 c. This is obtained by varying pump flow rate and head using the multi-speed

variator (or switch) on the pump itself. Increasing the pump speed reduces 

∆

t and vice versa.  The minimum

differential must not be less than 11

°

C.

5.08 Adjusting central heating system pressure

The pressure of water in the central heating system, read on the control panel pressure gauge, is adjusted as
described in paragraph 3.11 page 35.

N.B. - To avoid incurring unnecessary expense, in the event of boiler shut down, check that this is not caused by a
lack of electricity or gas, or low water pressure before calling the Customer Technical Service Helpline.

5.09 Gas conversion

The following adjustment and conversion operations must be carried out by competent personnel. FERROLI  Limited
accepts no liability for damage to property or  personal injury resulting from tampering with the boiler by
unauthorised persons.

To convert the boiler from Nat Gas to LPG and vice versa, the main burner injectors must be replaced. Minimum and
maximum pressures must then be adjusted on the gas valve (see Adjustment page 41).

Note: After converting the boiler from natural gas to liquid gas, fit the orange plate in the conversion kit near
the data plate.

Note: injector diameters and pressures at the main burner are given in Technical Data (page 5).

Fig. 33

5.03

Adjustment
potentiometers

P1 = C.H. temperature

adjustment

P2 = D.H.W. temperature

adjustment

P3 = C.H. output adjustment
P4 = Ignition gas pressure

adjustment

P5 = Factory set - Don't touch