Mikrofill 3 PRO-Pressurisation Unit

The Mikrofill 3 PRO (72846) is a fully automatic sealed system filling device, designed for the water management of domestic and commercial heating and cooling systems. Compact, efficient and straightforward to commission, it uses smart logic with pressure and flow sensors to provide early detection and alerts for system issues while requiring minimal maintenance.

• WRAS-approved with Fluid Risk Category 4 backflow prevention (WRAS approval no. 2307805)
• Max cold fill pressure: 8.7 Bar (max inlet/operating pressure: 9 Bar)
• Max flow rate: 12 l/min with live flow readings (±3% accuracy)
• Full colour 3.95" LCD display with comprehensive electronic pressure management
• Leak detection, smart fault logic, usage monitoring, volume logging and time/date stamped event history
• MODBUS RTU plus 4x customisable BMS outputs and volt-free contacts
• Includes wall mount backing plate, and 2 braided hoses with integrated isolation valve.

Typical applications include: maintaining system pressure in large domestic and commercial sealed heating systems, as well as chilled water systems, refrigeration units and industrial cooling systems.

Features

• Pressure control: Pressure setting resolution ±0.1 Bar; low inlet pressure cut-out at 0.3 Bar
• Monitoring & protection: Leak detection, high/low pressure fault indication, flood protection (run time limiter)
• Logging & diagnostics: Usage monitor with fill volume logs/counters; smart fault logic; records up to 100 parameter changes/fault conditions (time/date stamped)
• User interface: Colour backlit LCD screen; user password access; hand mode for manual operation; on-screen service reminder (user set)
• Connectivity: MODBUS RTU; 4 BMS outputs; customisable volt-free contacts
• Connections: Inlet 15 mm compression; system 15 mm compression; drain 22 mm compression
• Electrical: 230 V / 1 ph / 50 Hz supply; 3 A fuse rating; BMS relays max load 5 A
• Temperature: Ambient 5–45°C; inlet water 5–23°C; system water 5–85°C; max RH 70% (non-condensing); IP55
• Installation: Wall-mountable (backplate supplied; fixings not included). Clearances: left 100 mm, right 170 mm, top 100 mm, front (door closed) 750 mm
• Accessories included: 2x braided hoses with integrated isolation valve
• Dimensions (W x D): 250 mm x 155 mm; height: 290 mm to bottom of connections (without hoses) / 386 mm to bottom of tundish
• Weight: 5.3 kg (without hoses)
• Warranty: 2 years standard
• Manufactured: Great Britain