Functions; Acronyms; Setpoint - Riello NexPolar Series Installation And Technical Service Instructions

FUNCTIONS

4 FUNCTIONS
FUNZIONI
4.1

Acronyms

IaT Indoor Air Temperature
BPHE Brazed plate heat exchanger
CHWS Chiller Water System
DHW Domestic Hot Water
EHS Electric heater stage
EWT Entering Water Temperature
FCU Fan Coil Unit
lWT Leaving Water Temperature
NHC New Hydronic Control
oaT Outdoor Air Temperature
PMV Pulse Modulating Valve
SHC Space Heating/Cooling Control
Tr Refrigerant Temperature
UFC Underfloor Cooling
UFH Underfloor Heating
WUI Wall-mounted User Interface
4.2

Setpoint

Depending on the unit's configuration, the system's control can
be based on the water or air setpoint control. In order to achieve
greater comfort, the room temperature setpoint (remote user in-
terface) or the water temperature setpoint (local user interface) can
be adjusted to meet the specific requirements. It should be noted
that the temperature value can only be adjusted within the range
defined for each occupation mode.
Possible configurations
Setpoint local WUI
room air probe
Predefined temperature curves
CoolING: If the cooling temperature curve [P586] is set to "1" or "2",
the water setpoint will be calculated based on the selected cooling
temperature curve.
Temperature curve
K1
K2
remote WUI
Water Air
Min. oaT
20°C
20°C
The water setpoint calculation can be based on:
Predefined temperature curves based on the OAT: temperature
curves already defined in the control logic.
Fixed water setpoint: by entering a fixed value for each occupation
mode.
Custom temperature curve based on the OAT: defines custom tem-
perature curves based on the application.
Temperature curve offsets (predefined and defined by the user)
The unit features a local user interface (on board the unit), which
only allows for the water temperature setpoint to be controlled.
There are two predefined cooling temperature curves available:
Max. oaT Min. water temp.
40°C
40°C
42
Max. water temp.
5°C 10°C
10°C 18°C