Otis Elevator Door Operator

Description

Otis Elevator Door Operator XTB4351APF Brief Introduction

Product Name	Otis Elevator Door Operator
Model Number	XTB4351APF
Quality	Original.Brand New
Payment	T/T. Paypal. Western Union
Delivery	3-5 Working Days
Packaging	Packed by carton

Otis Elevator Door Operator XTB4351APF – Installation, Commissioning & Replacement Guide
Nanjing Zhuye Elevator Parts – OEM stock, global shipping, 24/7 support

The XTB4351APF is the heavy-duty door operator that drives every modern Otis Gen2® and SkyRise® elevator from 630 kg to 2,000 kg. This 400 VAC variable-frequency unit combines a 1.5 kW permanent-magnet motor, SIL-3 brake control and AT120 inverter in an IP54 cabinet, delivering smooth S-curve motion: 1.4 s opening, 1.0 s closing with 150 N nudge torque. A single cracked belt or a misaligned encoder will throw a “420” fault and park the car. Nanjing Zhuye Elevator Parts keeps complete XTB4351APF operators and every sub-assembly in Rotterdam and Nanjing so you can restore whisper-quiet door motion the same day. Below is an 800-word field manual that explains correct usage, on-site commissioning and the replacement cycle that keeps your elevators smooth, safe and code-compliant.

1. What the XTB4351APF does

1.5 kW PM motor, 0–230 Vac, 0–150 Hz, vector control
SIL-3 brake chopper, 110 Vdc, 3 A continuous, 8 A peak
AT120 inverter, 2 ms control loop, 0.5 mm position accuracy
IP54 cast-aluminium frame, built-in heat-sink, forced-cooling fan 24 Vdc 0.4 A
UL/CE certified to EN 81-20/50 and CSA B44.1 for 15-year design life

2. Tools to carry

XTB4351APF door operator (Nanjing Zhuye part #OT-DO-XTB4351APF-15kW) on pallet
5 mm, 6 mm Allen keys, 13 mm & 17 mm sockets
Torque wrench (10–50 N·m) and 1,000 Vdc multimeter
Otis Service Tool (OST) laptop with AT120 plug-in licence
IR thermometer and vibration pen
Lock-out / tag-out kit

3. Installation – 90 minutes with two technicians

Safety: place the car on inspection, open the main disconnect and wait 5 min for DC bus to discharge (<50 V).

Photograph every power and encoder connector – note L1/L2/L3, 110 Vdc brake, encoder, CAN.
Support the door motor with a sling; remove four M8 flange bolts and lower to pallet.
Check the belt and coupling – replace if cracks >2 mm or radial run-out >0.1 mm.
Mount new XTB4351APF; torque bolts to 25 N·m.
Re-connect all plugs; apply Otis-supplied conductive grease on DC lugs.
Power up – STATUS LED blinks green 3 times then solid; CAN LED flashes every 100 ms.
Launch OST → Door → Auto-Tune; motor learns resistance, inductance and encoder offset.
Run 3 full-speed cycles; verify open time 1.4 s ±0.1 s and nudge torque 150 N ±10 N.
Record serial number, date and tune values in CMMS.

4. Functional test – prove it to the controller

a) No-load current: 2.0 A ±0.2 A per phase at 50 Hz.
b) Encoder count: 1,024 ppr, no missing ticks, jitter <50 ns.
c) Door open time: 1.4 s ±0.1 s at 1.0 m/s car speed.
d) Nudge torque: 150 N ±10 N measured at leading edge.
e) Export OST report and attach PDF to site file.

5. Preventive maintenance schedule

Monthly – visual sweep for dust, belt wear or oil leaks.
Quarterly – measure heat-sink temperature <70 °C with IR gun.
Annually – scope PWM outputs; shoot-through spikes must be <50 V.
Every two years – replace the belt and brake pads – wear doubles after 2 million cycles.

6. Replacement cycle – duty and environment decide

Otis specification: 15 years. Nanjing Zhuye analytics refine this:

Light duty (<150 starts/day, office): 18 years
Standard duty (150–400 starts, residential): 15 years
Heavy duty (>400 starts, hospital, mall): 12 years
High dust (parking, seaside) or chemical fumes: 10 years – belt and encoder degrade faster.

Replace immediately if:

STATUS LED red steady – IGBT desaturation or over-temperature
Belt cracks >5 mm or teeth missing – risk of slip
Encoder jitter >200 ns – disk cracked by vibration
Heat-sink temperature >85 °C – fan bearing failure

7. Eco-disposal & warranty

Return the old operator on the supplied pallet; Nanjing Zhuye recovers aluminium, copper and gold and issues a €100 recycling credit. Every XTB4351APF ships with a 24-month replacement warranty, extendable to 60 months when you join our annual belt-replacement program.

8. Why buy from Nanjing Zhuye Elevator Parts

90 complete units in stock, Rotterdam & Nanjing, ready for same-day LTL dispatch
Factory-sealed Otis packaging with hologram and calibration sheet – no grey-market clones
QR code on nameplate links to wiring diagram and 5-minute tuning video
24/7 technical hotline staffed by ex-Otis door specialists
Bundle pricing: buy 2 operators and get a free belt kit plus freight credit

9. Bottom line

A failing door operator is the fastest way to a trapped-passenger call. Keep a genuine XTB4351APF on standby, swap it in 90 minutes, and your doors will open and close like new for the full 15-year design life. Order today from Nanjing Zhuye Elevator Parts – the fastest route from “door fault” to “perfect ride.”

Products Categories