HYDRAULIC CONFIGURATION 2 (two)

Description:
Hydraulic configuration number 2 consists of the Aqua stove connected to a boiler via a three-way valve, as well as heating terminals.

To activate this configuration, it is necessary to modify specific parameters on the control unit and correctly connect sensors and the three-way valve.

Control Unit Parameters

Operational notes:
P26= 2 Select hydraulic configuration 2
P83= 31 Enable the DHW sensor “S3” for stoves/boilers
Ih79= 2 °C DHW Sensor thermostat hysteresis (the hysteresis that must be subtracted from the DHW thermostat so as to request the boiler to restart if it is on standby)

DHW sensor connections (S3)

Stoves with rear connectors:

• TECNIKA TURBO GLASS, TECNIKA FOR HOME, TURBO TOP, TURBO GLASS, PRESTIGE, EXCLUSIVE, TECNIKA EXCLUSIVE
• The S3 sensor is connected on the control unit to output IN12 (Sensor: NTC-10K; Moretti Item: MFSONDC)

Stoves without rear connectors:

• ALADINO, ELEGANCE, CLESSIDRA, ERGONOMIC, COMPACT, VISION, SLOT VISION, DOLBY
• Connect directly on the control unit to PIN 56 – PIN 57 (output IN12) (Sensor: NTC-10K; Moretti Item: MFSONDC)

Three-way valve connection (Electrovalve P2)

Control unit pin                                   Connection                          Voltage

16 (N) – 17 (Foff)                              Towards system                          230 V – 50 Hz

16 (N) – 18 (Fon)                              Towards DHW kit                             230 V – 50 Hz

Room Thermostat (R.T.) Configuration

Main parameters:

Operational notes:

• The parameter P99 defines the logic of the thermostat contact (N.O. or N.C.).

P99 = 1 (default)  Room Thermostat in standard mode (N.O., normally open)

P99= 0  Invert the R.T. contact from N.O. to N.C. (normally closed)

• The parameter A01 defines the control unit behavior with respect to the R.T., with options for modulation, stand-by, or pump block.

A01=0 Not recommended: On/Off 

A01=1 (default) Operating state: Normal → Modulation

A01=2  Operating state: Normal → Stand-by

A01=3 Not recommended: Pump Block

A01=4  Operating state: Normal → Stand-by + Pump Block

Warning: use only the recommended settings; values A01 = 0 or 3 can cause malfunctions or pump blocks.

• The parameter T45 must be set to 1 to properly activate the R.T. function.

T45= 1 Enable the Room Thermostat function

Example:

Thermostat Parameters 

Operating Logic

Heating

1. Pump P1 activation
   Pump P1 activates when all the following conditions are met:
   • Boiler temperature T_boiler​ ≥ Th20 (50 °C)
   • Boiler temperature T_boiler​ ≤ Th79 (55 °C)
   • Difference between boiler sensor (S) and DHW sensor (S3) [T_boiler − T_DHW​] ≥ Th57 (8 °C)
2. Additional condition
   Pump P1 also activates if:
   • T_boiler​ ≥ Th19 (53 °C)
3. Anti-freeze protection
   • Pump P1 activates if T_boiler​ ≤ Th18 (5 °C)
4. Overtemperature safety
   • Pump P1 remains active if T_boiler​ ≥ Th21 (72 °C)

Sanitary

1. Three-way valve (P2) switching towards sanitary boiler
   The three-way valve switches towards the boiler when:
   • T_boiler​ ≤ Th79 (55 °C)
   • T_boiler​ ≥ Th20 (50 °C)
2. Boiler overtemperature safety
   • The three-way valve switches towards the system if T_boiler​ ≥ Th21 (72 °C)