Ferroli DOMItech F 24 D Instructions D'utilisation, D'installation Et D'entretien page 32

DHW temperature adjustment
Use the DHW buttons (details 1 and 2 - fig. 1) to adjust the temperature from a min. of
40°C to a max. of 50°C.
Room temperature adjustment (with optional room thermostat)
Using the room thermostat, set the temperature required in the rooms. If the room ther-
mostat is not installed, the boiler will keep the system at the set system delivery setpoint
temperature.
Room temperature adjustment (with optional remote timer control)
Using the remote timer control, set the required temperature in the rooms. The boiler will
adjust the system water according to the required room temperature. For operation with
remote timer control, please refer to the relevant instruction manual.
ECO/COMFORT selection
The unit has a function that ensures a high domestic hot water delivery speed and max-
imum comfort for the user. When the device is activated (COMFORT mode), the water
contained in the boiler is kept hot, thereby ensuring immediate availability of hot water
on opening the tap, without waiting times.
The user can deactivate the device (ECO mode) by pressing the eco/comfort button
(detail 7 - fig. 1). In ECO mode the display activates the ECO symbol (detail 12 - fig. 1).
To activate the COMFORT mode, press the eco/comfort button (detail 7 - fig. 1) again.
Sliding Temperature
When the optional external probe is installed, the boiler adjustment system works with
"Sliding Temperature". In this mode, the temperature of the heating system is controlled
according to the outside weather conditions, to ensure high comfort and energy saving
throughout the year. In particular, the system delivery temperature is decreased as the
outside temperature increases, according to a specific "compensation curve".
With Sliding Temperature adjustment, the temperature set with the heating buttons (de-
tail 3 - fig. 1) becomes the maximum system delivery temperature. It is advisable to set
a maximum value to allow system adjustment throughout its useful operating range.
The boiler must be adjusted at the time of installation by qualified personnel. Possible
adjustments can in any case be made by the user to improve comfort.
Compensation curve and curve offset
Press the reset button (detail 6 - fig. 1) for 5 seconds to access the "Sliding temperature"
menu; the display shows "CU" flashing.
Use the DHW buttons (detail 1 - fig. 1) to adjust the curve from 1 to 10 according to the
characteristic. By setting the curve to 0, sliding temperature adjustment is disabled.
Press the heating buttons (detail 3 - fig. 1) to access parallel curve offset; the display
shows "OF" flashing. Use the DHW buttons (detail 1 - fig. 1) to adjust the parallel curve
offset according to the characteristic (fig. 6).
Press the reset button (detail 6 - fig. 1) again for 5 seconds to exit the "Sliding Temper-
ature" menu.
If the room temperature is lower than the required value, it is advisable to set a higher
order curve and vice versa. Proceed by increasing or decreasing in steps of one and
check the result in the room.
OFFSET = 20
90
10 9 8
7
85
6
80
5
70
4
60
3
50
2
40
1
30
20
20 10 0 -10 -20
fig. 6 - Example of compensation parallel curve offset
32
EN
fig. 5
OFFSET = 40
90
10 9 8 7 6
85
80
70
60
50
40
30
20
20 10 0 -10
cod. 3540Z940 - 06/2012 (Rev. 00)
DOMItech F 24 - 32 D
Adjustments from Remote Timer Control
If the Remote Timer Control (optional) is connected to the boiler, the above ad-
A
justments are managed according to that given in table 1.
Table. 1
Heating temperature setting
Hot water temperature adjustment
Summer/Winter Switchover
Eco/Comfort selection
System water pressure adjustment
The filling pressure with system cold, read on the boiler water gauge (detail 2 - fig. 7),
must be approx. 1.0 bar. If the system pressure falls to values below minimum, the boiler
stops and fault F37 is displayed. Bring it to the initial value using the filling cock detail 1
fig. 7. At the end of the operation always close the filling cock.
A Open
B Closed
3. INSTALLATION
3.1 General Instructions
BOILER INSTALLATION MUST ONLY BE PERFORMED BY QUALIFIED PERSON-
NEL, IN ACCORDANCE WITH ALL THE INSTRUCTIONS GIVEN IN THIS TECHNICAL
MANUAL, THE PROVISIONS OF CURRENT LAW, THE PRESCRIPTIONS OF NA-
TIONAL AND LOCAL STANDARDS AND THE RULES OF PROPER WORKMANSHIP.
3.2 Place of installation
The unit's combustion circuit is sealed with respect to the place of installation, therefore
the unit can be installed in any room. However, the place of installation must be ade-
quately ventilated to prevent the creation of dangerous conditions even in case small gas
leaks. This safety rule is required by EEC Directive no.
gas, including so-called sealed chamber units.
The unit is suitable for operation in a partially protected place in conformity with EN 297
pr A6, with minimum temperature -5°C. If equipped with the special antifreeze kit it can
be used with minimum temperature as low as -15°C. It is advisable to install the boiler
under the slope of a roof, inside a balcony or in a sheltered recess.
In any case, the place of installation must be free of dust, flammable materials or objects
and corrosive gases.
5
4
The boiler is arranged for wall mounting and comes standard with a hooking bracket. Fix
3
the bracket to the wall according to the measurements given in the cover drawing and
hook the boiler on it. A metal template for marking the drilling points on the wall is avail-
2
able on request. The wall fixing must ensure stable and effective support for the gener-
1
ator.
If the unit is enclosed in a cabinet or mounted alongside, a space must be pro-
A
vided for removing the casing and for normal maintenance operations.
-20 3.3 Plumbing connections
Important
B
The safety valve outlet must be connected to a funnel or collection pipe to pre-
vent water spurting onto the floor in case of overpressure in the heating circuit.
Otherwise, if the discharge valve cuts in and floods the room, the boiler manu-
facturer cannot be held liable.
B
Before making the connection, check that the unit is arranged for operation with
the type of fuel available and carefully clean all the system pipes.
Carry out the relevant connections according to the cover diagram and the symbols giv-
en on the unit.
Note: The unit has an internal bypass in the heating circuit.
Water system characteristics
In the presence of water harder than 25° Fr (1°F = 10ppm CaCO
water in order to avoid possible scaling in the boiler.
Adjustment can be made from the Remote Timer Control menu and the
boiler control panel.
Adjustment can be made from the Remote Timer Control menu and the
boiler control panel.
Summer mode has priority over a possible Remote Timer Control heat-
ing demand.
Adjustment can only be made from the boiler control panel.
2
A
B
1
fig. 7 - Filling cock
2009/142
3
for all units operating on
), use suitably treated