Riello 20118250, Installation And Maintenance Manual

Page: 39 / 64

39
COMMISSIONING AND MAINTENANCE
3.2.5 Enable/disable the heating function
− Press the keys “+” and “-” simultaneously for a few sec-
onds;
− The icon and the current heating mode (ON or OFF) will
blink on the display;
− Press the keys “+” and “–” to select the required mode;
− Press the key “ENTER/RESET” or wait for 3 seconds to save
the modification made and go back to the initial screen.
3.2.6 Setting the heating parameters
The thermoregulation on the thermal unit uses pre-configura-
tions which allow to simplify the first start-up operations.
There are five boiler operating modes in heating mode (Par.
2001). The basic configuration of the parameter 2001 is 0.
The parameters to be set on the regulator will vary according to
the selected operating mode.
Mode 0 : operation with ambient thermostat (AT)/heat request
In this mode:
− External probe is not required.
− The OpenTherm (OT) communication is not enabled and
any OT thermostat connected is supplied but signals a
“communication error”.
− Input 0-10V is not used.
− The Modbus communication is enabled. If a device is
connected to the Modbus, the zone regulator works in
priority to the ambient thermostat (AT/OT).
The thermal unit thermoregulation manages the heating deliv-
ery temperature with a fixed setpoint defined in Par. 2103.
The setpoint value can be directly set, without having to access
the list of parameters as indicated in paragraph "Menu naviga-
tion" on page 28.
The setpoint can be set within a range defined by par. 2023
(minimum) and 2024 (maximum) as indicated in the figure.
The parameters regulating such temperature are:
Par.
No.
Description
2103
Main Zone/Zone 1 setpoint in heating mode Par. 2001
= 0 and 3.
The thermal unit adjustment determines the boiler
setpoint in heating mode, using the highest value
among the requests of all the active zones (Par. 1101,
1201, 1301).
If Zone 1 is set as mixed, the value set in parameter
1112 will be used as setpoint.
2023 Minimum heating setpoint.
2024 Maximum heating setpoint.
T delivery
(°C)
T outside (°C)
Tset min (°C)
Tset max (°C)
Setpoint
Par. 2024
Par. 2023
Par. 2103
Mode 1 : Operation with ambient thermostat (AT/OT) heat request
and external probe (accessory)
Display on climatic mode
°C
OUTSIDE
In this mode:
− The external probe (accessory) is necessary to enable the
thermal unit operation. The icon OUTSIDE is displayed. In
this case the heating setpoint can no longer be manually
changed, but is calculated by the regulator.
− The Open Therm (OT) communication is enabled.
− Input 0-10V is not used.
− The Modbus communication is enabled. If a device is
connected to the Modbus, the zone regulator works in
priority to the ambient thermostat (AT/OT).