MAX EVI Full DC Inverter VRF Multi Split Air Conditioning System 8-96HP

1. Product Overview

MAX series EVI vapor injection full DC inverter VRF system is modular commercial central air conditioning equipment, equipped with Hitachi DC inverter scroll compressors and eco-friendly zero-ozone-depletion R410A refrigerant. The outdoor unit lineup covers 13 standard models ranging from 8HP to 32HP, allowing up to 4 outdoor units combined into one single system with maximum total capacity 96HP, supporting up to 100 mixed indoor units per set. Adopting EVI quasi two-stage compression technology, the system breaks temperature limits of traditional VRF: stable full-load cooling at 55℃ high ambient, powerful heating down to -25℃, retaining 85% rated heating output at -15℃. Max 1000m ultra-long refrigerant piping fits high-rise office buildings and industrial parks. 180° sine wave vector drive, refrigerant cooled PCB board and multi-stage EXV valves achieve precise indoor temperature control within ±0.5℃. Integrated AI cloud diagnosis, triple equipment backup, night silent and adaptive defrost functions, widely applied in hotels, hospitals, shopping malls, factories, luxury villas and old HVAC renovation projects.

Single Outdoor Unit Cooling Capacity

Outdoor Unit Combination Rules

Refrigerant Piping Limit Parameters

2. Ten Core Technical Advantages

1). EVI Vapor Injection Low-Temp Heating For Cold Zones

Quasi two-stage EVI compression circuit greatly improves low-temperature heating capacity. Stable heating operation at -25℃ ambient, maintains 85% rated heating output at -15℃ without auxiliary boiler. Runs full-load cooling without capacity drop under 55℃ outdoor high temperature, avoiding high-pressure shutdown for rooftop machine rooms and tropical malls.

2). Full DC 180° Sine Wave Drive, 12% Higher Energy Efficiency

Brushless DC motors for compressors & outdoor fans, 180° sine wave vector control reduces motor reactive power loss, IPLV far exceeds national Grade 1 standard. 50%~130% stepless capacity adjustment cuts power consumption under low load for offices & hotels.

3). Refrigerant Cool PCB Control Board, No Derating At High Temp

Different from air-cooled drive boards, the PCB absorbs heat via circulating refrigerant, sustaining high-frequency continuous operation at 55℃ extreme ambient, solving high-temperature capacity reduction & frequent shutdown issues of conventional units.

4). 1000m Ultra-Long Piping For Integrated High-Rise Solution

Total refrigerant pipe length up to 1000m, max vertical height difference 100m between indoor & outdoor units. One single VRF system covers entire multi-story malls & high-rise towers without splitting multiple sets, cutting equipment & construction cost.

5). Full-Link AI Intelligent Management & Remote O&M

2.4G WIFI & RS485 dual communication supported, users power on/off & adjust temperature via mobile devices anytime. AI cloud real-time parameter monitoring predicts faults in advance for pre-maintenance, avoiding sudden shutdown. Built-in automatic refrigerant inspection & one-click auto addressing, reducing 35% wiring & commissioning faults. Optional extra functions: hotel card power lock, auto refrigerant charging, building BMS docking, 7-level time-sharing power limit.

6). 5D Adaptive Intelligent Defrost Without Indoor Temp Drop

Abandons fixed-cycle defrost logic, comprehensively judges defrost timing via ambient temp, coil temp, load & superheat data, paired with staggered dual-circuit defrost. Minimal indoor temperature fluctuation during defrost, eliminating uncomfortable sudden cooling.

7). Triple Equipment Backup Avoid Full Building Shutdown

1. Compressor backup: If one compressor fails, the other operates independently;

2. Fan backup: Single fan fault will not affect unit heat dissipation;

3. Multi-module cycle startup: Rotate outdoor units to balance wear & extend service life; Built-in buzzer positioning for fast fault location during maintenance.

8). Multi-Layer Noise Reduction & Night Silent Mode

1. 7-section bionic low-noise fan blade with multi-stage shock absorption structure;

2. Night silent mode lowers compressor & fan speed, cutting noise by 10dB(A);

3. Anti-snow fan reverse rotation removes accumulated snow in winter to prevent blade damage.

9). Lightweight Installation & Maintenance Design

1. Front service window, read error codes without disassembling whole cabinet;

2. 360° multi-direction refrigerant pipe outlet at unit bottom for flexible site layout;

3. 5-stage intelligent oil return system without balance pipe to reduce welding leakage points;

4. Adjustable outdoor fan external static pressure for smooth ventilation inside equipment rooms.

10). Eco R410A Refrigerant & Full Safety Protection

Zero ODP R410 refrigerant complies with global environmental regulations. Complete electrical protection covers high/low pressure, overcurrent, phase loss, anti-freeze & overload for long unattended stable operation.

3. Standard Operation Control Modes

1. Time-sharing energy-saving mode: 7 power limit levels to automatically reduce load according to schedule;

2. Mode lock function: 6 background lock options (cooling priority / heating priority / cooling only / heating only / VIP priority / auto) for hotel & office management;

3. Hotel card interlock: Indoor unit enters standby when card removed, recovers preset temperature after card inserted.

4. Main Application Scenarios

1. Commercial Buildings: Star hotels, high-rise offices, general hospitals, exhibition centers, shopping malls;

2. Industrial Parks: Production workshops, R&D labs, office complexes;

3. Residential Projects: Luxury villas, multi-apartment zoning HVAC;

4. Renovation Works: Replace old split & water air conditioners without massive ceiling demolition.

5. Basic Installation Specifications

1. Parallel limit: Max 4 outdoor units combined, single unit capacity ≤24HP;

2. Power supply: 380-415V three-phase 50/60Hz;

3. Ventilation: Reserve ≥1.5m clearance around outdoor unit to prevent hot air recirculation;

4. Cold region suggestion: Ethylene glycol anti-freeze system optional for northern winter;

5. Communication wiring: Max 240m length for RS485 wired cable.