General Instructions; Place Of Installation; Plumbing Connections; Important - Ferroli DOMItech C 24 D Instructions D'utilisation, D'installation Et D'entretien

DOMItech C 24 - 32 D
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
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 Adjustment can be made from the Remote Timer Control menu and the
boiler control panel.
Hot water temperature adjustment Adjustment can be made from the Remote Timer Control menu and the
boiler control panel.
Summer/Winter Switchover Summer mode has priority over a possible Remote Timer Control heat-
ing demand.
Eco/Comfort selection Adjustment can only be made from the boiler control panel.
fig. 5
OFFSET = 40
90
10 9 8 7 6
85
80
70
60
50
40
30
20
20 10 0 -10
cod. 3540Z952 - Rev. 00 - ediz. 10/2013
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

This unit is an "open chamber" type and can only be installed and operated in perma-
nently ventilated rooms. An insufficient flow of combustion air to the boiler will affect its
normal operation and fume evacuation. Also, the fumes forming in these conditions are
extremely harmful to health if dispersed in the domestic environment.
If equipped with the optional antiwind grille, the unit is suitable for operation in a partially
protected place according to EN 297 pr A6, with minimum temperature of -5°C. If
equipped with the special antifreeze kit it can be used with minimum temperatures to -
15°C. The boiler must be installed under the slope of a roof, inside a balcony or in a pro-
tected recess.
In any case, the place of installation must be free of dust, flammable materials or objects
or corrosive gases.
The boiler is arranged for wall mounting and comes standard with a hooking bracket. Fix
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-
able by request. The wall fixing must ensure a stable and effective support for the gen-
erator.
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.

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
5
Before making the connection, check that the unit is arranged for operation with
4
the type of fuel available and carefully clean all the system pipes.
3
Carry out the relevant connections according to the cover diagram and the symbols giv-
2
en on the unit.
1
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.
-20
Antifreeze system, antifreeze fluids, additives and inhibitors
When necessary, antifreeze fluids, additives and inhibitors can be used only if the man-
ufacturer of such fluids or additives guarantees that they are suitable and do not cause
damage to the exchanger or other components and/or materials of the boiler and system.
Do not use generic antifreeze fluids, additives or inhibitors that are not specific for use in
heating systems and compatible with the materials of the boiler and system.
Antifreeze kit for outdoor installation (optional)
In case of installation in a partially protected place, the boiler must be equipped with the
special antifreeze kit for protecting the DHW circuit. The kit comprises a thermostat and
4 electric heaters. Connect the kit to the PCB and position the thermostat and heaters
on the DHW circuit pipes as indicated in the instructions provided with the kit.
External antiwind grille (optional)
If the boiler is installed outside in a partially protected place, after carrying out the water
and gas connections the special antiwind protection grille must be fitted according to the
instructions given in the kit.
2
A
B
1
fig. 7 - Filling cock
3
EN
), use suitably treated
29