Lennox VRF HE DC Inverter Units Service Manual — 460V R410A PDF

Description

Lennox VRF HE DC Inverter Units Service Manual — 460V R410A PDF DOWNLOAD

Description

Overview

This comprehensive Lennox VRF HE DC Inverter Units Service Manual provides complete guidance for installation verification, commissioning, diagnostics, maintenance, and after-sales service of multi-module VRF HE Series outdoor units operating on R410A refrigerant at 440–460V / 3-phase / 60Hz.

The manual explains:

• safety and service precautions

• commissioning workflow & documentation

• fault indication and error codes

• detailed troubleshooting logic

• refrigerant charging & leakage checks

• replacement of key components

• parts lists, exploded views & electrical drawings

It supports both basic modules and combined multi-module systems up to 96 HP.

Models Covered 

Basic Modules (Single Unit)

VEP075N432G2 • VEP096N432G2 • VEP120N432G2 • VEP132N432G2
VEP150N432G2 • VEP171N432G2 • VEP196N432G2 • VEP210N432G2
VEP240N432G2

Cooling capacities range from 22.4 kW to 68 kW with inverter scroll compressors (EVI).

Combined Multi-Module Units (26–96 HP)

Examples include:

• 12+14 → VEP252N432G2 (26 HP)

• 22+22 → VEP420N432G2 (44 HP)

• 22+24+24 → VEP690N432G2 (70 HP)

• 24+24+24+24 → VEP960N432G2 (96 HP)

Tables include:

• cooling & heating capacity

• input power & rated current

• refrigerant charge values

• maximum connected indoor units

• gas & liquid pipe diameters

• weight & dimensions

(Full multi-page model tables included in Chapter 1.)

Highlighted Technical Specifications

(from Parameters Tables — pp.3–10)

• Refrigerant: R410A

• Power Supply: 440–460V / 3~ / 60Hz

• Compressor: Inverter scroll, EVI

• Outdoor static pressure: 0–110 Pa

• Operating temperature range:

  • Cooling: -15°C to 48°C DB

  • Heating: -25°C to 24°C DB

Safety note: cooling below -5°C is conditional and requires engineering approval.

Structured Contents 

Chapter 1 — Product

• Unit List (basic + combined modules)

• Performance parameters & piping sizes

• Operating temperature range

Chapter 2 — Commissioning

Includes full commissioning workflow and documentation templates:

• commissioning process & preparation tools

• safety requirements

• pre-commissioning checklists

• installation verification (piping, wiring, grounding)

• communication & controller addressing checks

• commissioning data record forms

The checklist tables cover:

• refrigerant pressure balance validation

• valve leakage inspection

• pipe length & elevation rules

• static pressure confirmation

• phase sequence & voltage tolerance

• communication termination resistors

Chapter 3 — Faults

• Error indication tables

• Fault code descriptions

• Troubleshooting flow charts

• Non-fault condition diagnostics (202+ pages of cases)

Covers:

• pressure & temperature anomalies

• compressor startup conditions

• communication failures

• sensor resistance & signal ranges

Chapter 4 — Maintenance

Includes procedures for:

• refrigerant leakage inspection

• refrigerant charging methods

• oil & piping inspection

• pressure testing

• key component replacement

• exploded views & parts list (from p.304)

Appendixes

• Temperature sensor resistance tables

• Refrigerant pressure / temperature charts

• Pressure sensor voltage conversion tables

• Electrical specifications

• Circuit diagrams

• System schematic diagrams

• Component name & function guide

Why This Manual is Valuable

Ideal for:

• VRF service contractors

• commissioning engineers

• HVAC maintenance teams

• facility & BMS integration technicians

It provides complete lifecycle service coverage from installation validation to advanced diagnostics.

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