Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
135N8853 Danfoss VLT HVAC Drive 7.5 kW/10HP 380-480VAC IP55
Danfoss 135N8853 VLT HVAC Drive FC 102, a 7.5 kW three-phase AC variable speed drive designed for HVAC pumps, fans, compressors and building services applications with IP55 protection and BACnet/IP communication.
£1,208.35
Danfoss 135N8853 at a glance
The Danfoss 135N8853 is a 7.5 kW / 10 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 A5, IP55 / UL Type 12 unit, built for wall mounting in plant rooms without a separate enclosure.
This configuration has RFI class A1/B (C1) with reduced motor cable length, no brake chopper, a graphical LCP 102 control panel, and a BACnet/IP MCA 125 fieldbus card. The full type code is decoded alongside the FAQs.
Sizing and installation
- Enclosure: IP55 / UL Type 12 — built for wall mounting in plant rooms without a separate enclosure.
- EMC: RFI class A1/B (C1) is met only with a reduced screened motor cable length. Check the maximum length for this frame in the Danfoss FC 102 Design Guide (Technical Documents tab); for longer runs, ask us about an H2 (A2/C3) variant.
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 7.5 kW rating, other enclosures
This driveIP55Danfoss 135N8853IP55 / UL Type 12
EnclosureIP20Danfoss 131B5474IP20 / chassisView drive →
EnclosureIP66Danfoss 131F6499IP66 / 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 | 7.5 kW | |
|---|---|---|
| Voltage | 480 V | |
| Phase | Three Phase | |
| IP Rating | IP55 | |
| EMC Filter | Commercial | |
| Series | VLT HVAC Drive FC 102 | |
| Part number | 135N8853 | |
| Model code | FC-102P7K5T4E55H3XGX1XXSXXXXAKBXCXXXXDX | |
| Product type | AC variable speed drive | |
| Rated output power | 7.5 kW / 10 HP | |
| Input voltage | 380–480 V AC | |
| Input phases | Three phase | |
| Output phases | Three phase | |
| Protection rating | IP55 / Type 12 | |
| RFI filter | Class A1/B (C1) | |
| Brake chopper | No | |
| A option | MCA 125 BACnet/IP | |
| B option | No B option | |
| Control panel | Graphical Local Control Panel | |
| PCB protection | Not coated PCB | |
| Frame size | A5 | |
| Dimensions (H × W × D) | approx. 420 × 242 × 200 mm | |
| Weight | approx. 12.86 kg | |
| EAN | 5710108250485 |
Frequently asked questions
What is the maximum motor cable length with this RFI filter?
The 135N8853 has the H3 filter: RFI class A1/B (C1) with a reduced motor cable length. The exact limit for this frame is in the Danfoss VLT HVAC Drive FC 102 Design Guide (see Technical Documents). If your screened cable run is longer, contact us and we will suggest an alternative.
Which communication protocols does it support?
This unit is fitted with a BACnet/IP MCA 125 card, in addition to the built-in RS-485 protocols: Danfoss FC, Modbus RTU, BACnet MS/TP, Metasys N2 and FLN Apogee.
Can this drive be wall mounted without a panel?
Yes. The IP55 / UL Type 12 enclosure is designed for direct mounting.
Type code decoded
FC-102P7K5T4E55H3XGX1XXSXXXXAKBXCXXXXDX
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 | 7.5 kW / 10 HP | P7K5 |
| Mains voltage Position 11–12 | 3 × 380–480 V AC | T4 |
| Enclosure Position 13–15 | IP55 / UL Type 12 | E55 |
| RFI filter Position 16–17 | RFI class A1/B (C1) with reduced motor cable length | H3 |
| Brake / Safe Stop Position 18 | No brake chopper | X |
| 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 | BACnet/IP MCA 125 | AK |
| 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 |
