FRAL Refrigerant Dehumidifier FD750
- Functioning at under zero temperature (optional)
- Hot gas defrosting device with electronic & thermostatic control (optional)
- Automatic humidistat (or remote control)
- Fittings for continuous draining connection
- Available in double version air supply: horizontal or upper air supply
- High and low pressure switches
- Scroll compressor
- Very strong aluminium pipe frame with galvanised and painted steel panels
- Three speed fan

Product information
The FRAL FD750 is a heavy-duty refrigerant dehumidifier designed for large-scale commercial and industrial moisture control applications. With optional sub-zero operation capability and hot gas defrosting, this unit delivers reliable performance in demanding environments where continuous drainage and robust construction are essential.
Key Features
- Scroll compressor technology with high and low pressure switches for reliable operation and protection
- Optional sub-zero temperature operation with electronic and thermostatic hot gas defrosting system
- Robust construction featuring strong aluminium pipe frame with galvanised and painted steel panels
- Flexible installation options with horizontal or upper air supply configurations and double version availability
- Three-speed fan with automatic humidistat control or remote operation for precise moisture management
Typical Applications
This heavy-duty dehumidifier is engineered for large manufacturing buildings, warehouses, commercial agricultural facilities, military armouries and mining industry applications. The unit’s high-capacity design and robust construction make it suitable for environments requiring substantial moisture removal and continuous operation.
If you are considering installing this large capacity dehumidifier, you are already thinking big. It is capable of removing nearly a tonne of water. The FD980 will remove up to 980 litres of water in a 24 hour period.
Large manufacturing buildings, warehouses, commercial agricultural facilities, military armouries or the mining industry are the applications this heavy duty unit is designed for.
TECHNICAL DATA
| Power Consumption (at 20˚C, 60% rh) | FD750
9000 w |
FD980
11200 w |
| Power Consumption (at 35˚C, 95% rh) | 11000 w | 13000 w |
| Absorbed Current (at 35˚C, 95% rh) standard | 22 A | 28 A |
| Locked Rotor Current LRA stand. Ver. 230/1/50 | 80 | 100 |
| Noise level (at 3 meters) | 67 dB | 70 dB |
| Refrigerant | R407c | R407c |
| Defrost Control System | Electronic | Electronic |
| Hot Gas Defrost System (optional) | Electronic thermostat | Electronic thermostat |
| Continuous Drainage Pipe (male) | 19mm | 19mm |
| Temperature Range standard version | 7-35˚ C | 7-35˚ C |
| Temperature Range hot gas defrost. version | 0.5-35˚ C | 0.5-35˚ C |
| Relative Humidity Range | 45-99% | 45-99% |
| Condensation Capacity (at 30˚C, 80% rh) | 600 l/24 hr | 870 l/24 hr |
| Condensation Capacity (at 32˚C, 90% rh) | 750 l/24 hr | 980 l/24 hr |
| Weight | 230 kg | 320 kg |
| Dimensions | 200 x 130 x 160cm | 200 x 130 x 160cm |
Note: 3 phase power supply required
AIR FLOW WITH DIFFERENT HEAD PRESSURES
| Available head pressure (Pa) |
180 |
200 |
220 |
240 |
260 |
280 |
300 |
| Air flow cm/h FD750 (middle fan speed) |
6200 |
6100 |
6000 |
6000 |
6000 |
5900 |
5800 |
| Air flow cm/h FD980 (max fan speed) |
8500 |
8300 |
8200 |
8100 |
8100 |
8000 |
8000 |
CONDENSED WATER AT DIFFERENT AMBIENT TEMPERATURE AND HUMIDITY CONDITIONS – FD750
| 10˚C 60% |
10˚C 80% |
15˚C 60% |
15˚C 80% |
20˚C 60% |
20˚C 80% |
25˚C 60% |
25˚C 80% |
27˚C 65% |
27˚C 80% |
30˚C 80% |
32˚C 90% |
| 110 l/d | 190 l/d | 160 l/d | 250 l/d | 280 l/d | 320 l/d | 290 l/d | 400 l/d | 340 l/d | 460 l/d | 600 l/d | 750 l/d |
CONDENSED WATER AT DIFFERENT AMBIENT TEMPERATURE AND HUMIDITY CONDITIONS – FD980
| 10˚C 60% |
10˚C 80% |
15˚C 60% |
15˚C 80% |
20˚C 60% |
20˚C 80% |
25˚C 60% |
25˚C 80% |
27˚C 65% |
27˚C 80% |
30˚C 80% |
32˚C 90% |
| 150 l/d | 270 l/d | 220 l/d | 390 l/d | 330 l/d | 490 l/d | 400 l/d | 570 l/d | 490 l/d | 670 l/d | 870 l/d | 980 l/d |





