VARISPEED TRANSCRITICAL - 4PTC-7.F3K
Given the output characteristics of CO₂ systems, an efficient and seamless capacity control is particularly important. Therefore, for years BITZER has provided compressors with built-in frequency inverters (FI) for trans-critical CO₂ applications. This range of models has now grown once more with the new 4PTC-7.F3K compressor. Seamless capacity control minimizes suction pressure fluctuations and cycling rates, thus reducing energy costs.
- Built-in, maintenance-free, suction gas-cooled frequency inverter
- Lightweight, compact aluminium design
- Optimal capacity adjustment thanks to seamless capacity control
| Displacement | Displacement at 87 Hz | Frequency range | No. of cylinder x bore x stroke | Weight | Max. pressure (LP/MP/HP) | Connection suction line | Connection discharge line | Oil type R744 (CO2) | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 1450 RPM 50Hz | 1750 RPM 60Hz | |||||||||
| SI | 4,3 m3/h | 5,2 m3/h | 7,5 m3/h | 30..87 Hz | 4 x 30mm x 17,5mm | 123 kg | 100/160 bar | 22 mm - 1 1/8'' | 18 mm - 3/4" | BSE85K (Standard) |
| IP | 152 CFH | 183 CFH | 265 CFH | 30..87 Hz | 2 x 1.18 inch x 0.69 inch | 271 lb | 1450/2320 psi | 22 mm - 1 1/8'' | 18 mm - 3/4" | BSE85K (Standard) |
Extent of delivery (Standard)
| Type | Motor protection | Enclosure class | Vibration dampers | Oil charge | Crankcase heater |
|---|---|---|---|---|---|
| SI | SE-B1 | IP65 | Standard | 2,00 dm³ | 0..120 W PTC (Standard) |
| IP | SE-B1 | IP65 | Standard | 70.4 fl oz | 0..120 W PTC (Standard) |
Available Options
| Type | Connection suction line | Discharge shut-off valve | Oil level monitoring |
|---|---|---|---|
| SI | Weld DN22 | Swagelok DN16, Braze DN16, Weld DN10 | OLC-K1 (Option) |
| IP | Weld DN22 | Swagelok DN16, Braze DN16, Weld DN10 | OLC-K1 (Option) |
Motor data
| Type | Motor version |
|---|---|
| SI | 1 |
| IP | 1 |
Sound measurement
| Sound power level (-10°C / 90bar) | Sound pressure level @ 1m (-10°C / 90bar) | |
|---|---|---|
| SI | 71,8 dB(A) @ 50Hz | 63,8 dB(A) @ 50Hz |
| IP | 74,3 dB(A) @ 60Hz | 66,3 dB(A) @ 60Hz |
Electrical data frequency inverter
| Tension | |
|---|---|
| SI | 380..480V/3/50_60Hz |
| IP | 380..480V/3/50_60Hz |