Blue Diamond MiniBlue® V2 X88-509 Condensate Pump with CondenSense™ Reservoir
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Blue Diamond MiniBlue® V2 X88-509 Condensate Pump
The MiniBlue® V2 is one of the most compact and efficient performers in the Blue Diamond® V2 Series — purpose-built for reliable condensate removal in space-limited installations. Delivering up to 8 L/hour with a remarkably small footprint, it is ideal for modern, high-efficiency AC systems up to 14kW where size and simplicity matter.
Powered by Blue Diamond's CondenSense™ technology with the intelligent CS2 microchip, the MiniBlue V2 communicates directly between reservoir and pump for real-time monitoring and automatic flow adjustment. The result is whisper-quiet, energy-efficient operation that adapts seamlessly to demand — minimising wear and energy use.
Its filter-free, lightweight design reduces maintenance requirements and simplifies installation, offering long-term dependability with minimal servicing. Integrated elastomeric feet reduce vibration and noise, and streamlined plug-and-play connections make setup faster and cleaner than ever.
Key Features
- CondenSense™ 2.0 technology with CS2 microchip — intelligent, demand-based operation
- Automatic flow adjustment for energy-efficient, quiet condensate removal
- Soft-start control with variable operational volume (19–21 dB(A))
- Enhanced Rotary Diaphragm technology — prevents bio-film build-up
- Automatic priming — no need to manually siphon
- Valveless, clog-resistant, filter-free design
- Dynamic condensate monitoring with rear-mounted LED indicators
- Brushless motor — upgraded efficiency and extended service life
- New combined FSA + HLA alarm system with LED indicator as standard
- Mountable up to 8m away from the AC unit in any orientation
- Plug-and-play connectivity — faster, cleaner installation
- UKCA, CE, Plenum Rated and ETL approved
- 3-year warranty — class-leading for condensate pump category
Technical Specifications
| Parameter | Value |
|---|---|
| Model | X88-509 |
| Max Flow Rate | 8 L/hour |
| Max Head | 8 Metres |
| Max Lift | 5 Metres |
| Sound Level | 19–21 dB(A) |
| Suitable AC Unit Size | Up to 14 kW |
| Unit Type | Mini Split |
| Voltage | 115V–230V / 50-60Hz |
| Pump Technology | Rotary Diaphragm (Brushless) |
| CondenSense™ Compatible | Yes (CS2 Microchip included) |
| Alarm System | FSA + HLA combined with LED indicator |
| Certifications | UKCA, CE, Plenum Rated, ETL |
| Warranty | 3 Years |
| Brand | Blue Diamond |
| MPN | X88-509 |
| Availability | UK, EU, ROW |
Discharge Pipe Run
| Vertical (V) | Horizontal (H) |
|---|---|
| 8 Metres | 0 Metres |
| 7 Metres | 3 Metres |
| 6 Metres | 6 Metres |
| 5 Metres | 9 Metres |
| 4 Metres | 12 Metres |
| 3 Metres | 15 Metres |
| 2 Metres | 18 Metres |
| 1 Metre | 21 Metres |
Note: The MiniBlue® V2 can be mounted in any orientation up to 8 metres away from the air-conditioning unit. For each metre not used on vertical head you can run 3m on the horizontal. A heavy load on the pump will reduce the flow rate over greater distances. Performance is for guide only.
Compatible Systems
- Air conditioning systems up to 14 kW
- Mini-split and cassette systems
- Mid-range fan coil applications
- High humidity environments
- Plenum-rated — suitable for plenum space installations
Compatible Brands
Suitable for use with Daikin, Mitsubishi Electric, Fujitsu, Panasonic, Samsung, LG, Hitachi, Toshiba, and most other AC brands.
Replaces Legacy Model
The X88-509 is the direct V2 replacement for the Blue Diamond X87-500 MiniBlue and Blue Diamond X87-504 MiniBlue legacy models.
Frequently Asked Questions
- What does CondenSense™ technology do?
- CondenSense™ uses the integrated CS2 microchip to enable direct communication between the reservoir and pump, providing automatic flow adjustment, real-time monitoring, and precision soft-start sequencing for quieter, more efficient operation.
- Does the X88-509 replace the X87-500 and X87-504?
- Yes. The MiniBlue V2 X88-509 is the current replacement for both the X87-500 (Cooling Signal/CR Plug) and X87-504 (Temperature Sensor) legacy models, with improved efficiency, monitoring, and a 3-year warranty.
- What AC system size is this pump suitable for?
- The X88-509 is designed for AC systems up to 14 kW, including mini-split and cassette applications.
- What is the new alarm system on the V2?
- The V2 combines the FSA (Fail Safe Alarm) and HLA (High Level Audio) functions into a single enhanced alarm system with an LED indicator as standard — more streamlined and comprehensive than previous models.
- Is this pump Plenum rated?
- Yes. The MiniBlue V2 is Plenum rated, meaning it meets fire safety standards for use in plenum spaces where materials must limit smoke and toxic fume spread.
- Does this pump require a fuse?
- Yes. A 0.5A fuse is required but not supplied with the pump.