First Commissioning; Vent Cycle; Operating Status - Riello Vokera VISION PLUS 20 S User Instructions

5.6

FIRST COMMISSIONING

Ensure that steps 6.1 through to 6.6 have been completed be-
fore supplying the gas and electrical supply to the appliance.
ƒ Position the system's master switch to the "on" position.
ƒ Open the gas tap to allow fuel to flow.
ƒ With power on the backlight comes on, then all the icons
and the segments come on for 1sec and in sequence the
firmware revision is displayed for 3sec:
ƒ Then the interface displays the status active at that moment.
5.7

VENT CYCLE

b
Each time that the boiler is powered, an automatic vent
cycle is carried out lasting 4 min. When the air purging
cycle is in progress all heat requests are inhibited and
-AIR is displayed on the interface screen.
The purge cycle can be interrupted early by keeping key 2 (the
icon RESET comes on).
ƒ Adjust the ambient temperature thermostat to the desired
temperature (~20°C) or, if the system is equipped with
a programmable thermostat or timer, ensure that the
thermostat or timer is "active" and set correctly (~20°C).
ƒ Then set the boiler on WINTER or SUMMER depending on
the type of operation desired.
ƒ The boiler will start up and continue working until the set
temperatures are reached, after which it will then go back
to standby.
5.8

OPERATING STATUS

For changing the operating status from WINTER to OFF press
key 1 until the icon for the desired function is displayed.
5.8.1 WINTER MODE
ƒ Set the boiler to the WINTER status by pressing key 1 until
the heating icon are displayed.
The interface normally displays the delivery temperature.
ƒ When there is a heat request and the boiler is igniting, the
icon appears on the display.
28
Heating REQUEST, the radiator icon blinks:
5.8.2 OFF
ƒ Set the boiler to the OFF status by pressing key 1 until the
central segments are displayed.
5.8.3 ADJUSTING THE HEATING WATER
TEMPERATURE WITHOUT AN OUTDOOR
TEMPERATURE SENSOR CONNECTED
If there is no outdoor temperature sensor the boiler operates
at a fixed point, the HEATING setpoint in this case can be
set on the main page of the screen. Pressing the key C or D
displays the current heating setpoint; the value blinks with a
frequency of 0.5 sec ON, 0.5 sec OFF and the icons
come on.
+
RESET
The successive pressing of the key C or D allows you to set
the value of the heating setpoint within the preset range:
[40°C - 80.5°C] for high temperature systems
[20°C - 45 °C] for low temperature systems
with steps of 0.5°C.
The level bars beside the heating icon show the setpoint value
set with respect to the operating range:
- four bars on = max setpoint
- one bar on = min setpoint
Keeping one of the two keys C or B pressed for longer, the
meter increases the speed of advancement modifying the set
value. If no key is pressed for 5sec, the value set is taken as
the new heating setpoint and the display returns to the main
page.
5.8.4 ADJUSTING THE HEATING WATER
TEMPERATURE WITH AN OUTDOOR
TEMPERATURE SENSOR CONNECTED
If an outdoor temperature
thermoregulation is enabled (parameter P4.18 = 1), the
delivery temperature is automatically selected by the system,
which quickly adjusts the ambient temperature according
to the variations in the outdoor temperature. If you want to
change the temperature, raising it or lowering it with respect
to the temperature automatically calculated by the electronic
Bar
and
C
+
D
MENU
sensor is installed and