Riello NXHP Series Installation, Operation And Maintenance Instructions page 52

4 -OPERATION
Water setpoint configuration
The water setpoint calculation can be based on:
1/ Predefined Climatic Curves depending on OAT: climatic curves already preconfigured in the control logic.
2/ Fixed Water Setpoint: using a fixed value for each occupancy mode.
3/ Custom Climatic Curve depending on OAT: define customized climatic curves in function of the application.
4/ Offset on climatic curves (predefined and customer)
1/ Predefined climatic curves
COOLING: If the cooling climatic curve [P586] is configured to "1" or "2", the water setpoint will be calculated according to the
selected cooling climatic curve.
Two predefined cooling climatic curves are available:
Climatic Curve
K1
K2
Cooling Climatic Curves
■ If OAT is invalid (not transmitted by the Inverter, out-of-range
value, etc.), the Water Setpoint is equal to the current Min.
Water Temp.
■ If OAT is above the current Maximum OAT threshold, the Water
Setpoint is equal to the current Max. Water Temp.
HEATING: If the heating climatic curve [P581] is configured to a parameter from "1" to "12", the water setpoint will be calculated
according to the selected heating climatic curve.
Twelve predefined heating climatic curves are available:
Climatic Curve
K1
K2
K3
K4
K5
K6
K7
K8
K9
K10
K11
K12
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Min. OAT Max. OAT
20°C 40°C
20°C 40°C
OAT (°C)
Min. OAT Max. OAT
-7°C 20°C
-5°C 20°C
-9°C 20°C
-8°C 20°C
-5°C 20°C
0°C 20°C
-20°C 20°C
-20°C 20°C
-12,7°C 20°C
-5,9°C 20°C
-1,5°C 20°C
3,5°C 20°C
Min. Water Temp
5°C
10°C
The climatic curve corresponds to the water setpoint in Home
mode. To define the other occupancy modes, it is necessary to
configure Cool Sleep Offset [P405] and Cool Away Offset [P406]:
K1
K2
Cooling Climatic Curve in function
Min. Water Temp
20°C
20°C
20°C
40°C
40°C
40°C
22°C
23°C
24°C
25°C
26°C
27°C
Max. Water Temp
10°C
18°C
of occupancy mode
P405
OAT (°C)
Max. Water Temp
38°C
33°C
45°C
50°C
55°C
60°C
42°C
55°C
60°C
60°C
60°C
60°C
Application
FCU's
UFC
Home
Sleep
Away
P406
Application
UFH
UFH
FCU's
FCU's
Radiators
Radiators
FCU's
Radiators
Radiators
Radiators
Radiators
Radiators