Ariston

Role in our panels

How we use Ariston

Ariston's residential heat pump range centres on the Alteas ONE+ series (6, 8, 11, and 12 kW monobloc ASHP with integrated hydronic module). The Alteas ONE+ includes an integrated buffer tank, circulator pump, expansion vessel, and safety valve — simplifying installation compared to split-system heat pumps. The Genus ONE condensing gas boiler (18-30 kW) is Ariston's flagship residential boiler for Eastern European markets where gas heating remains prevalent. Both the Alteas ONE+ and Genus ONE support the optional NET module accessory for remote monitoring and Modbus TCP communication. The Ariston NET module (DIN rail, connects via Ariston proprietary BUS to the heat pump or boiler PCB) provides Modbus TCP on port 502 with default unit ID 1. The register map is documented in the Ariston NET module technical manual: Register 1 = flow temperature setpoint (°C × 10, read/write — write 550 for 55.0°C DHW setpoint), Register 5 = DHW setpoint (°C × 10), Register 100 = operating mode (0=off, 1=heating, 2=DHW only, 3=combined heating+DHW), Register 200 = fault code (0=no active fault, non-zero values reference Ariston fault code list). The Intesis IN701KNX gateway maps these registers to KNX group addresses: GA 8/0/0 flow temperature setpoint as DPT 9.001 (2-byte float), GA 8/0/1 operating mode as DPT 5.001, GA 8/0/4 fault as DPT 1.005. SG Ready integration for the Alteas ONE+ provides a simpler alternative to Modbus TCP when full register access is not required. The Alteas ONE+ control PCB has S1 and S2 terminals (SG Ready standard: two potential-free contacts). S1+S2 both closed = State 4 (forced DHW charge at maximum — emergency override). S1 closed only = State 3 (increased DHW setpoint and heating enabled — solar surplus mode). S1 and S2 both open = State 2 (normal mode). S2 closed only = State 1 (blocked/delay mode for grid management). A KNX relay actuator (e.g. MDT AKD-0401.02) directly controls the SG Ready contacts from a KNX GA responding to PV surplus logic — no NET module required for SG Ready. Ariston is the dominant residential heating brand in Romania, where it holds approximately 35% market share in gas boilers, and is strong in Poland, Bulgaria, and the Czech Republic. PanelCraft KNX panels for Eastern European projects typically include Ariston Genus ONE or Alteas ONE+ integration with local Modbus TCP via the NET module, complemented by SG Ready relay for rapid surplus response. Italian projects often combine Ariston Alteas ONE+ with KNX floor heating zone control and solar PV.

Ariston Genus One boiler and Alteas ONE+ heat pump use Modbus TCP via the optional Ariston NET module (DIN rail, connects via Ariston proprietary bus). NET module Modbus TCP port 502. Register map: Reg 1 = flow temperature setpoint (°C × 10, read/write), Reg 5 = DHW setpoint (°C × 10), Reg 100 = operating mode (0=off/1=heating/2=DHW/3=combined), Reg 200 = fault code (0=no fault). Intesis IN701KNX maps registers to KNX GAs: GA 8/0/0 setpoint DPT 9.001, GA 8/0/1 mode DPT 5.001, GA 8/0/4 fault DPT 1.005. Alteas ONE+ also has SG Ready S1/S2 terminals for PV surplus relay control.