Figure 15: Activation And Configuration For Drying Mode - Riello NXHP Series Installation, Operation And Maintenance Instructions

4 -OPERATION
4.2.16 - Pump configuration
The management of different states of the pump (ON / OFF) is different according to the kind of installation (options, accessories,
applications). In the compatibility table below, the different control logics for the pump are presented in function of installation:
Different control logic for main pump
Par. Definition
Control On Air
510
561 Pump On When Satisfied
510 Control On Air
561 Pump On When Satisfied
510 Control On Air
561 Pump On When Satisfied
510 Control On Air
Pump On When Satisfied
561
If a secondary hydraulic loop is used, this will have its own additional pump. A discrete output can control a contactor (not supplied
with unit)
Contactor coil: 230VAC - 50Hz
Characteristics
CAUTION:
The installer is responsible for ensuring the protection of any additional pump against the low water flow rate (no flow switch
can be managed by unit control).
Different control logic for additional pump
Additional Pump Logic [P572]
No additional pump
Always On
According to Space Temp.
Always On, but Off when DHW activated
According to Space Temp, but Off when DHW activated
4.2.17 - Drying mode
The Drying mode enables a gradual water temperature ramp-up in Heat mode for UFH drying. This operating mode can only be
selected from the service access level, it is automatically stopped at the end of the configured period.
Example of application in drying mode:
■ Drying Starting Setpoint [P595] is set to 20°C
■ Drying Warm-up days [P596] is set to 3 days
■ Drying Ramp-up days [P597] is set to 4 days
■ Drying Hold-up days [P598] is set to 5 days
■ and Heating Home Water Setpoint [P401] is set to 28°C
OFF
Mode
Off
Off
Off
Off
Off

Figure 15: Activation and configuration for drying mode

Setting (°C)
Warm-up
Heating
28°C
Setting
Drying
20°C
Starting
Setting
1 2 3
Value Off Mode
Yes
Off
No
Yes
Off
Yes
No
Off
No
No
Off
Yes
Cool/Heat
Satisfied
Off
On
According to IAT vs Air Setpoint
On
According to IAT vs Air Setpoint
Ramp-up Hold-up
4 5 6 7 8 9
Cool/Heat Satisfied
According to IAT vs Air Setpoint
On
Off (On for water sampling)
On
Boiler
Demand On Off
Off Off N.A.
On On N.A.
On On N.A.
On On N.A.
On On N.A.
Time
(days)
10 11 12 13
Cool/Heat
Demand
On
On
On
On
DHW
On Off
N.A. N.A.
N.A. N.A.
N.A. N.A.
Off N.A.
Off N.A.
59