Initial Lighting - Riello Vokera EASI-HEAT i User Instructions

5.10 INITIAL LIGHTING

ƒ Position the system's main switch to the "on" position.
ƒ Open the gas tap to allow the fuel to flow.
ƒ When the power is enabled, all the icons and segments will
light up for 1 sec and the firmware revision will be visual-
ised for 3 sec:
1 88
8
ƒ The automatic venting cycle will then be launched (if it is
enabled) and will last 4 min (for the details, refer to the
paragraph "5.11 Venting cycle").
ƒ The interface will show the status active in that moment.
b
Adjust the ambient thermostat to the required
temperature (~ 20°C) or, if the system is equipped with a
timed thermostat or programmer, make sure it is "active"
and adjusted (~20°C).
ƒ Bring the boiler to WINTER or SUMMER mode.
5.11 VENTING CYCLE
Position the system's master switch to the "on" position. Every
time the boiler is powered, a 4-minute venting cycle is run. The
display shows . To interrupt the venting cycle, press the key
shown in the figure below.
o o o
b
When the venting cycle is running, all heat requests are
inhibited apart from DHW unless the boiler is OFF.
The venting cycle can also be interrupted (if the boiler is not OFF)
by a DHW request.
5.12 OPERATING STATUS
ƒ Pressing key 1, the operating type switches cyclically be-
tween OFF - SUMMER - WINTER and then OFF again.
In standby, the display shows the system pressure. It shows
the delivery temperature if there is a heating request, or the
DHW temperature if there is a DHW request.
---
WINTER MODE
The boiler activates the heating and DHW function. The pres-
ence of the " " icon indicates a heat request and burner
switch-on.
SUMMER MODE
The boiler activates the traditional DHW function.
WINTER
8 50
24
.
1
CH delivery
temperature
50 8
. 1
5
.
DHW temperature
stand-by
50 4
SUMMER
50 4
5.13 SETTING THE HEATING SETPOINT
.
0 0 6
first press
If no key is pressed for 5 sec, the set value is taken as the new
heating setpoint.
5.14 SETTING THE HEATING SETPOINT
WITH AN EXTERNAL PROBE
If an external probe is connected (optional) and temperature
control is enabled (parameter 418=1), the delivery tempera-
ture value is selected automatically by the system, which
quickly alters the ambient temperature on the basis of varia-
tions in the outdoor temperature.
Modifying the heating setpoint
5 -
The setpoint correction is in the range (-5 to +5°C).
With parameter 418= 0, the boiler works with a fixed point.
5.15 SETTING THE DHW SETPOINT
.
5 0 7
or
first press
If no key is pressed for 5 sec, the set value is taken as the new
DHW setpoint.
5.16 SETTING THE THERMOREGULATION
The thermoregulation is only available if an external probe is
connected, and is only active for the HEATING function.
THERMOREGULATION is enabled in the following way:
ƒ set parameter 418 =1.
With 418 = 0 or the external probe disconnected, the boiler
works with a fixed point. The temperature value measured
by the external probe is visualised in "5.34 INFO menu" un-
der item I009. The thermoregulation algorithm will not use the
measured external temperature value directly, but rather a
calculated external temperature that takes into account the
building's insulation: in buildings that are well insulated, the
outdoor temperature variations will have less impact than tho-
se that are poorly insulated by comparison.
This value can be viewed in the INFO menu under item I010.
REQUEST FROM OT CHRONOTHERMOSTAT
In this case, the delivery setpoint is calculated by chronoher-
mostat on the basis of the external temperature value and the
difference between the real ambient temperature and the re-
quired ambient temperature.
REQUEST FROM ROOM THERMOSTAT
In this case, the delivery setpoint is calculated by the
adjustment board on the basis of the external temperature va-
lue, to obtain an estimated ambient temperature value of 20°
(reference ambient temperature).
There are 2 parameters that compete to calculate the output
setpoint:
ƒ slope of the compensation curve (KT) - editable by technical
staff
ƒ offset on the reference ambient temperature - editable by
the user.
.
6 0 5
or
second press
set CH setpoint value in steps of 0.5 °C
5
or
.
7 0 1
or
second press
set DHW setpoint value in steps of 0.5 °C