EL-DB EVO N
4
EN
cod. 3541P770 - Rev. 00 - 06/2018
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.
fig. 13 - Compensation curves
fig. 14 - Example of compensation parallel curve offset
Adjustments from Remote Timer Control
A
If the Remote Timer Control (optional) is connected to the boiler, the above ad-
justments are managed according to that given in table 1. Also, the control pan-
el display (detail 5 - fig. 1) shows the actual room temperature detected by the
Remote Timer Control.
Table. 1
Water system pressure adjustment
The filling pressure with system cold, read on the display, must be approx. 1.0 bar. If the
system pressure falls to values below minimum, the boiler card will activate fault F37
(fig. 15).
fig. 15 - Low system pressure fault
A
Once the system pressure is restored, the boiler will activate the 120-second
air venting cycle indicated on the display by FH.
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 boiler must be installed in a special room with ventilation openings towards the out-
side in conformity with current regulations. If there are several burners or extraction units
that can work together in the same room, the ventilation openings must be sized for si-
multaneous operation of all the units. The place of installation must be free of flammable
objects or materials, corrosive gases, volatile substances or dusts which, sucked by the
burner fan, can obstruct the pipes inside the burner or the combustion head. The room
must be dry and not exposed to rain, snow or frost.
A
If the unit is enclosed in a cabinet or mounted alongside, a space must be pro-
vided for removing the casing and for normal maintenance operations. In par-
ticular, after boiler installation with burner on the front door, make sure the front
door can open freely without the burner striking walls or other obstacles.
3.3 Plumbing connections
The heating capacity of the unit must be previously established by calculating the build-
ing's heat requirement according to the current regulations. The system must be provid-
ed with all the components for correct and regular operation. It is advisable to install
shutoff valves between the boiler and heating system allowing the boiler to be isolated
from the system if necessary.
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.
Do not use the water system pipes to earth electrical appliances.
Before installation, carefully wash all the pipes of the system to remove any residuals or
impurities that could affect proper operation of the unit.
Carry out the relevant connections according to the diagram in and thecap. 5 symbols
given on the unit.
Water system characteristics
In the presence of water harder than 25° Fr (1°F = 10ppm CaCO3), use suitably treated
water in order to avoid possible scaling in the boiler. Treatment must not reduce the hard-
ness to values below 15°F (Decree 236/88 for uses of water intended for human con-
sumption). Treatment of the water used is indispensable in case of very large systems
or with frequent introduction of replenishing water in the system.
B
If water softeners are installed at the boiler cold water inlet, make sure not to
reduce the water hardness too much, as this could cause early deterioration of
the magnesium anode in the hot water tank.
Antifreeze system, antifreeze fluids, additives and inhibitors
The boiler is equipped with an antifreeze system that turns on the boiler in heating mode
when the system delivery water temperature falls under 6°C. The device will not come
on if the electricity and/or gas supply to the unit are cut off. If it becomes necessary, it is
permissible to use antifreeze fluid, additives and inhibitors only if the manufacturer of
these fluids or additives guarantees they are suitable for this use and cause no damage
to the heat exchanger or other components and/or materials of the boiler unit and sys-
tem. It is prohibited to use generic antifreeze fluid, additives or inhibitors that are not ex-
pressly suited for use in heating systems and compatible with the materials of the boiler
unit and system.
Connection to a storage tank for domestic hot water production
Heating temperature setting
Adjustment can be made from the Remote Timer Control menu and the boiler
control panel.
DHW 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 heating
demand.
Eco/Comfort selection
On disabling DHW from the Remote Timer Control menu, the boiler selects the
Economy mode. In this condition, the
button 7
- fig. 1 on the boiler panel is dis-
abled.
On enabling DHW from the Remote Timer Control menu, the boiler selects the
Comfort mode. In this condition it is possible select one of the two modes with
the
button 7
- fig. 1 on the boiler panel.
Sliding Temperature
Both the Remote Timer Control and the boiler card manage Sliding Temperature
adjustment: of the two, the Sliding Temperature of the boiler card has priority.
20
30
40
50
60
70
80
90
85
20
10
0
-10
-20
1
2
3
4
5
6
8
9
10
7
20
30
40
50
60
70
80
90
85
20
30
40
50
60
70
80
90
85
1
2
3
4
5
6
8
9
10
7
1
2
3
4
5
6
8
9
10
7
OFFSET = 20
OFFSET = 40
