Operation; Withdrawal Range Graph - sylber DEVYL 11 D ie FF Manuel D'installation Et D'utilisation

DEVYL D ie FF
4.4 Switching off for long periods
If the boiler is not going to be used for a long period of time:
- Turn the main dial ( A ) on the control panel to the "OFF" position.
C
A D B
- Turn the main system dial to "OFF".
- Check that the green light switches off ( C ).
- Shut-off the gas valve and water taps.
b
Empty the system if there is a risk of freezing.
The Technical Support Service is available for advice, should it not be pos-
sible to implement the above procedure easily.

4.5 Operation

The "thermostatic" power to this appliance automatically varies, meaning
that it adjusts gas consumption in line with the quantity of water requested.
The temperature of the water withdrawn varies from 35°C to 60°C accord-
ing to the position of the temperature selection potentiometer. Unlike tradi-
tional fi xed-fl ame appliances, this appliance is fi tted with a modulating valve
which optimises performance. It allows the appliance to operate with lower
water pressure and fl ow, modulating the fl ame in relation to the quantity
of water withdrawn, so as to keep the temperature constant (see graph).
The appliance is fi tted with a fl ame-ionisation automatic ignition. Each time
water is withdrawn, the burner fl ame is automatically turned on and remains
on while in operation.

4.6 Withdrawal range graph

The graphs below show the operating range of the appliance's electronic
modulation.
Using the temperature selection dial (B), the temperature of the hot water
requested can be selected from between the minimum and the maximum.
By turning the dial (B) to an intermediary point, the temperature of the wa-
ter provided is between the minimum and maximum values that can be
selected.
The outer curves in the graphs refer to the temperatures obtained in rela-
tion to the water fl ow rate with the dial (B) set to the minimum or maximum
positions.
The temperatures shown refer to stable conditions with the cold water sup-
ply temperature at 15 ±1°C, with a tolerance of ± 0.5 l/min of the water fl ow
rate provided and of ±2°C of the hot water temperature obtained. The tem-
peratures shown in the graph are read at the boiler hot water outlet pipe.
The fl ow limiter allows the set temperature of the hot water provided to be
adjusted at any time, within the specifi ed limits.
As a result, the permitted operating range (with the limiter in position) is that
shown by the curves and the dotted vertical line corresponding to the water
fl ow limiter value.
28
If very little water is withdrawn (around 2-2.5 l/min.) or where the mains
water pressure is very low, and with the potentiometer set to the maximum
temperature, modulation can no longer control the temperature in an opti-
mal way. As a result, the burner may turn on and off repeatedly with fl uctuat-
ing variations in temperature.
It is recommended that you lower the requested temperature by a few de-
grees by turning the dial (B) anticlockwise
DEVYL 11 D ie FF graph
65
60
55
50
45
40
35
30
25
0 1 2 3 4
DEVYL 13 D ie FF graph
65
60
55
50
45
40
35
30
25
0 1 2 3 4
DEVYL 17 D ie FF graph
70
65
60
55
50
45
40
35
30
25
0 1 2 3 4 5 6
.
5 6 7 8 9
fl ow rate l/min
5 6 7 8 9 10 11
fl ow rate l/min
7 8 9 10 11 12 13 14 15
fl ow rate l/min
10 11 12
12 13 14
16 17 18