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131Z9225 Danfoss VLT FC-102 HVAC Drive 18.5 kW / 25 HP, 380 – 480 VAC, IP55
Danfoss 131Z9225 VLT HVAC Drive FC-102 frequency converter, 18.5 kW / 25 HP, three phase 380-480 V AC, IP55 / Type 12 backplate, Safe Stop, RFI Class A1/B filter, graphical local control panel and mains disconnect, designed for HVAC motor control in ventilation, heating, refrigeration and air handling applications.
£2,035.00
Danfoss 131Z9225 at a glance
The Danfoss 131Z9225 is an 18.5 kW / 25 HP VLT HVAC Drive FC 102 for 3 × 380–480 V AC supplies, made for the fans, pumps and compressors in building services. It is a frame B1, IP55 / UL Type 12 with backplate unit, built for wall mounting in plant rooms without a separate enclosure.
This configuration has RFI class A1/B (C1), safe Stop, no brake chopper, and a graphical LCP 102 control panel. The full type code is decoded alongside the FAQs.
Sizing and installation
- Continuous output current: 37.5 A / 34 A. Size the drive on the motor nameplate current at your actual supply voltage.
- Intermittent (overload) current: 41.2 A / 37.4 A — the normal-overload rating that suits variable-torque fan and pump loads.
- Enclosure: IP55 / UL Type 12 with backplate — built for wall mounting in plant rooms without a separate enclosure.
- EMC: RFI class A1/B (C1). Check the permitted screened motor cable length in the Danfoss FC 102 Design Guide.
FC 102 features for HVAC
- Built-in RS-485 protocols: Danfoss FC, Modbus RTU, BACnet MS/TP, Metasys N2 and FLN Apogee — connects to most building management systems without an option card.
- Fire Mode keeps the drive running during an emergency, for example to keep smoke-extract fans turning.
- Automatic Energy Optimisation (AEO) cuts motor losses at part load — Danfoss quotes a further 5–15% saving.
- Pump and fan functions: sleep mode, dry-pump, end-of-curve and broken-belt detection, plus a built-in cascade controller for pump sets.
- Built-in DC coils limit mains harmonics (EN 61000-3-12).
- Smart Logic Controller for simple sequencing without a PLC.
Where the energy saving comes from
Centrifugal fans and pumps follow the affinity laws: absorbed power falls with the cube of speed. Running at 80% speed needs roughly half the power of full speed (0.8³ ≈ 0.51, before motor and drive losses) — which is why speed control pays back faster on fans and pumps than almost any other load.
Other sizes and enclosures
Same configuration, different power
Smaller15 kWDanfoss 131L0564IP55 / UL Type 12 with backplate · frame B1View drive →
This drive18.5 kWDanfoss 131Z9225IP55 / UL Type 12 with backplate · frame B1
Larger22 kWDanfoss 131Z9226IP55 / UL Type 12 with backplate · frame B2View drive →
Same 18.5 kW rating, other enclosures
This driveIP55Danfoss 131Z9225IP55 / UL Type 12 with backplate
EnclosureIP20Danfoss 131F9854IP20 / chassisView drive →
EnclosureIP21Danfoss 131B5838IP21 / UL Type 1View drive →
EnclosureIP66Danfoss 131X4868IP66 / UL Type 4XView drive →
Typical applications
✓ Supply and extract fans in air-handling units
✓ Chilled- and hot-water circulation pumps
✓ Cooling towers and condenser fans
✓ Booster sets and multi-pump stations
✓ Ventilation and smoke-extract systems
Technical Specifications
Tick the specs you need, then view products that match.
| Power | 18.5 kW | |
|---|---|---|
| Voltage | 480 V | |
| Phase | Three Phase | |
| IP Rating | IP55 | |
| EMC Filter | Commercial | |
| Series | VLT® HVAC Drive FC-102 | |
| Product code | 131Z9225 | |
| Model code | FC-102P18KT4P55H1TGX1XXSXXXXAXBXCXXXXDX | |
| Product type | Frequency converter / variable speed drive | |
| Application type | HVAC drive | |
| Rated power | 18.5 kW / 25 HP | |
| Input voltage | 380-480 V AC | |
| Input phases | Three phase | |
| Enclosure rating | IP55 / Type 12 Backplate | |
| RFI filter | Class A1/B (C1) | |
| Frame size | B1 | |
| Control panel | Graphical local control panel | |
| Brake / safety function | Safe Stop | |
| PCB coating | Not coated PCB | |
| Mains option | Mains disconnect | |
| Adaptation A | Standard cable entries | |
| Adaptation B | No adaptation | |
| A option | No A option | |
| B option | No B option | |
| C0 option | No C0 option | |
| C1 option | No C1 option | |
| Software option | No software option | |
| D option | No D option | |
| Software release | Latest release standard software | |
| Language pack | Standard language pack | |
| Continuous current | 37.5 A / 34 A | |
| Intermittent current | 41.2 A / 37.4 A | |
| kVA rating | 26 kVA | |
| Power loss | 465 W | |
| Dimensions (H × W × D) | 494 × 243 × 261 mm | |
| Gross weight | 26.37 kg | |
| Net weight | 22.75 kg | |
| Volume | 105.71 L | |
| EAN | 5710107389285 |
Frequently asked questions
Which communication protocols are built in?
Danfoss FC, Modbus RTU, BACnet MS/TP, Metasys N2 and FLN Apogee over the built-in RS-485 port. This unit has no fieldbus option card fitted, so PROFIBUS, PROFINET, EtherNet/IP or BACnet/IP would need an MCA option card.
What output current does it deliver at 400 V and at 480 V?
Continuous output current is 37.5 A / 34 A; intermittent current is 41.2 A / 37.4 A. Always size on the motor nameplate current at your supply voltage.
Can this drive be wall mounted without a panel?
Yes. The IP55 / UL Type 12 with backplate enclosure is designed for direct mounting.
Type code decoded
FC-102P18KT4P55H1TGX1XXSXXXXAXBXCXXXXDX
G fitted / defines this unit X not fitted / standard
| Product series Position 1–6 | VLT HVAC Drive FC 102 | FC-102 |
|---|---|---|
| Power size Position 7–10 | 18.5 kW / 25 HP | P18K |
| Mains voltage Position 11–12 | 3 × 380–480 V AC | T4 |
| Enclosure Position 13–15 | IP55 / UL Type 12 with backplate | P55 |
| RFI filter Position 16–17 | RFI class A1/B (C1) | H1 |
| Brake / Safe Stop Position 18 | Safe Stop, no brake chopper | T |
| Local control panel Position 19 | Graphical LCP 102 | G |
| PCB coating Position 20 | Standard (uncoated) PCBs | X |
| Mains option Position 21 | Mains disconnect | 1 |
| Adaptation A Position 22 | Standard cable entries | X |
| Adaptation B Position 23 | Standard | X |
| Software release Position 24–27 | Latest standard release | SXXX |
| Software language Position 28 | Standard language package | X |
| A option (fieldbus) Position 29–30 | No fieldbus option | AX |
| B option (I/O) Position 31–32 | No B option | BX |
| C0 option Position 33–34 | No C0 option | CX |
| C1 option Position 35 | No C1 option | X |
| C option software Position 36–37 | None | XX |
| D option Position 38–39 | No D option | DX |
