First Commissioning; Vent Cycle; Operating Status - Riello VOKERA VISION PLUS Series 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

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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 except
those for domestic hot water when the boiler is not set
to OFF and -AIR is displayed on the interface screen.
The purge cycle can be interrupted early by keeping key 2
(the icon RESET comes on). The purge cycle can also be
interrupted, if the boiler is not set to OFF, by a domestic hot
water request.
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 SUMMER
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
both the domestic hot water icon and the heating icon are
displayed.
The interface normally displays the delivery temperature
unless there is a domestic hot water request in progress, in
which case the domestic hot water temperature is displayed.
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ƒ When there is a heat request and the boiler is igniting, the
icon appears on the display.
Heating REQUEST, the radiator icon blinks:
5.8.2 SUMMER MODE
ƒ Set the boiler to the SUMMER status by pressing key 1
until the domestic hot water icon is displayed.
In this status the boiler activates the traditional function of
just domestic hot water, the interface normally displays the
delivery temperature. In the event of a domestic hot water pick
up, the display shows the temperature of the domestic hot
water.
Domestic hot water REQUEST, the tap icon blinks:
5.8.3 OFF
ƒ Set the boiler to the OFF status by pressing key 1 until the
central segments are displayed.
5.8.4 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.
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DAY
C
+
D
MENU
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