HVAC heating unit MDA

for medicinecirculating water

Overview
The MDA domestic hot water module is a pre-assembled unit for DHW production with storage, intended for centralised systems with high demand. It integrates an inspectable plate heat exchanger, a high-efficiency pump, hydraulic components and electronic control to manage water temperature, scheduled thermal cycles and overall operation.

Domestic hot water production with storage
The module transfers heat to one or more domestic hot water storage tanks and the connected distribution network. Storage maintains hot water availability during peak demand. Correct sizing requires the draw-off profile, temperatures, flow rates, storage volume, circulation network and available heat source to be defined.

Programmable thermal cycles for Legionella risk management
The MDA controller schedules thermal disinfection cycles via a weekly calendar and stores outcomes for up to 64 cycles. Alarms and the display flag sensor faults or incomplete cycles. This feature supports technical management of DHW systems but does not replace correct design, operation, monitoring and maintenance of the complete installation.

Digital control and remote monitoring via Modbus
PID-based digital regulation allows setting target temperatures and operating parameters. The Modbus connection enables integration with compatible building or plant management systems for remote monitoring, alarm checks and coordination with the heat plant.

Inspectable heat exchanger and project-specific design
The plate heat exchanger is sized according to operating data and permitted pressure drops. Its inspectable construction facilitates plate inspection, cleaning and maintenance. The unit is pre-assembled to simplify installation and requires the hydraulic and electrical connections specified in the project.

Information required for sizing

• DHW demand profile and required flow rate
• Inlet and outlet temperatures for both circuits
• Storage volume and configuration
• Circulation network characteristics
• Heat source, operating pressure and permitted pressure drops
• Supervision and alarm-management requirements

Applications

• Legionella risk management
• Production of sanitary hot water combined with storage

Sectors

• HVAC and building services
• Healthcare: hospitals and care homes

Frequently asked questions

• Does MDA eliminate Legionella? MDA can schedule and record thermal disinfection cycles and flag incomplete cycles; the effectiveness depends on correct design and management of the entire DHW system, so the module does not guarantee absolute elimination of risk.
• Can MDA be monitored remotely? Yes. Its Modbus connection enables integration with compatible supervision systems for remote monitoring of operating parameters and alarms.
• How is the correct configuration selected? Sizing is based on actual installation data and the expected demand profile; selection requires project-specific information.

Technical features
Application: DHW production with storage and programmable thermal cycles
Max flow: 7.5 m3/h (with TSC510) - 24 m3/h (with TSC1410)
Chassis: PN10

Materials
Chassis: Painted carbon steel P355NH (EN 10028/3a)
Plates: Stainless Steel AISI 316L
Gaskets: EPDM

Characteristics / technical specifications

• Model: MDA
• Brand: Techno System
• Pre-assembled DHW module with storage and scheduled thermal disinfection
• Inspectable plate heat exchanger for inspection, cleaning and maintenance
• PID-based digital control with Modbus remote monitoring
• Stores outcomes of up to 64 thermal cycles; alarms and display for cycle faults or incomplete cycles
• High-efficiency pump and integrated hydraulic components
• Max flow: 7.5 m3/h (with TSC510) - 24 m3/h (with TSC1410)
• Chassis rating: PN10
• Chassis material: Painted carbon steel P355NH (EN 10028/3a)
• Plate material: Stainless Steel AISI 316L
• Gaskets: EPDM