5
HYDRAULIC INSTALLATION
30
▶
Hot water
setpoint: parameter "161". this parameter sets the water temperature that, when reached, causes the appliance to be
deactivated.
▶
Hot water
differential: parameter "162". This parameter represents an interval in degrees that, when added to the set-point, de-
fines the temperature at which the appliance is reactivated.
Heating mode:
The appliance heats the water until it reaches the
setpoint
temperature. The appliance then switches off. This means that the water
temperature slowly drops to the
setpoint
+
differential
temperature. At this point, the appliance turns back on.
For example, if we set the following values:
▶
Thermostat control
: "0" (= read INTAKE water temperature).
▶
Setpoint
: +40.0 °C.
▶
Differential
: -2.0 °C.
The appliance will behave as follows:
1.
the water temperature rises (heating);
2.
the intake water temperature r40 °C (= setpoint);
3.
The appliance switches off;
4.
the system water temperature slowly drops (loses heat to the environment);
5.
the intake water temperature r38 °C (= se differential);
6.
the appliance turns back on: heating starts again. The cycle is repeated.
The following instructions give a detailed description of how to configure the hydraulic parameters in menu 3 (or menu 4) on the
machine’s controller.
Hydraulic parameter settings
You will need: the controller’s display sequentially shows the operating data (temperature, delta T°) regarding the current
mode (e.g.: heating). Special key provided with the appliance.
1.
See procedure "HOW TO ACCESS THE MENUS" (Paragraph 4.2
→
14) and proceed as described in steps "1" to "5".
2.
The display will now flash "0.". Turn the knob until menu 3 displays (the display shows "3.") or menu 4 (the displays shows "4.").
▶
For example: to set the parameters of menu 3:
1.
The display shows “3.”. Press the knob to access the menu. the display shows the first of the menu parameters: "3.73" or "3.160"
(= menu 3, parameter "73" or "160").
2.
The display shows "3.73" or "3.160". To access a parameter, press the knob: the displays shows the preset value (e.g. "1"), flash-
ing, to indicate that it can be modified.
3.
Press again to confirm "1" (= outlet water thermostat control); to modify the value, turn the knob until "0" displays: press to
confirm "0" (= intake water thermostat control).
4.
The display now shows the current parameter "3.73" or "3.160" again: the parameter has been set to its new value.
5.
Turn the knob to display the next parameter. The display shows: "3.75" or "3.161". To access a parameter, press the knob: the
displays shows the preset value (e.g. "60"), flashing, to indicate that it can be modified.
6.
Press again to confirm "60" (= water temperature setpoint); to modify the value, turn the knob until the desired value displays
(e.g. "40"): press again to confirm "40" (= water temperature setpoint);
7.
The display now shows the current parameter "3.75" or "3.161" again: the parameter has been set to its new value.
8.
Turn the knob to display the next parameter. The display shows: "3.76" or "3.162". To access a parameter, press the knob: the
displays shows the preset value (e.g. “-10"), flashing, to indicate that it can be modified.
9.
Press again to confirm “-10" (= water temperature differential); to modify the value, turn the knob until the desired value dis-
plays (e.g. “-2"): Press again to confirm “-2" (= water temperature differential).
10. The display now shows the current parameter "3.76" or "3.162" again: the parameter has been set to its new value.
11. To quit menu 3, turn the knob clockwise until the quit screen displays: "E". The display shows “3.”. E": press the knob. The display
will now show the current menu "3.". To exit the menu selection screen, turn the knob clockwise until “E” displays: press to
confirm.
The controller’s display now sequentially shows, as at the beginning, the operating data (temperature, delta T) regarding the
current mode (e.g.: heating).
To modify a parameter in menu 4, to access the menu (installation technician only) you are first prompted for a password. For
the password, contact the Robur TAC or
Technical Service Department
of Robur S.p.A. (Tel. +39.035.888111).
The special key allows the knob of the electronic board to be operated without opening the cover of the electrical panel, so
that operators are protected from live components. When the necessary settings have been completed, put away the special
key, replace the cap on the aperture of the electrical panel and refit the front panel of the appliance.
SPECIAL PARAMETER SETTINGS
The appliance is a Range Rated boiler: the power delivery of the appliance can be adapted to the real system requirements by regu-
lating the nominal gas flow (nominal thermal input).
The thermal input can be regulated with parameter "180" in menus 4 and 5. The parameter has a range from maximum (34.9 kW) to
minimum (8.0 kW) thermal capacity (see also Table 3.1
→
9).
