Lennox VRB192 - User Manual

1
INSTALLATION/OPERATION
INSTRUCTIONS
VRB Heat Recovery
VRF SYSTEMS
OUTDOOR UNITS
507885-03
05/2019
THIS MANUAL MUST BE LEFT WITH THE
OWNER FOR FUTURE REFERENCE
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
Shipping and Packing List
General
Check the components for shipping damage. If you
nd any damage, immediately contact the last car-
rier. Package 1 of 1 contains the following:
1 - Assembled VRB heat recovery outdoor unit
1 - Outdoor unit installation instruction
1 - Piping accessory package
The VRB heat recovery outdoor units are matched
with up to 64 indoor units per system to create a VRF
(variable refrigerant ow) system that uses HFC-
410A refrigerant.
Refer to the Product Specication bulletin (EHB)
for the proper use of these heat recovery units with
matching indoor units, mode selection boxes, branch
pipes, line sets and controls.
WARNING
!
Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, personal injury or loss of life.
Installation and service must be performed
by a licensed professional HVAC installer (or
equivalent) or service agency.
Failure to follow safety warnings and these
instruc tions exactly could result in property
damage, dan gerous operation, serious injury,
or death.
Any additions, changes, or conversions
required in order for the appliance to
satisfactorily meet the ap plication needs must
be made by a licensed profes sional HVAC
installer (or equivalent) using factory-specied
parts.
Do not use this system if any part has been
under water. A ood-damaged appliance is
extremely dan gerous. Immediately call a
licensed professional HVAC service technician
(or equivalent) to inspect the system and to
replace all controls and electrical parts that
have been wet, or to replace the system, if
deemed necessary.
Do not change the settings of any protection
devices installed in the outdoor unit. If the
pressure switch, thermal switch, or other
protection device is shorted or forcibly
operated, re or explosion may occur.
Do not use parts other than those specied by
Lennox or re and/or explosion may occur.
WARNING
!
IMPORTANT
The Clean Air Act of 1990 bans the intentional
venting of refrigerant (CFC’s and HCFC’s) as of
July 1, 1992. Approved methods of recovery,
recycling or reclaiming must be followed. Fines
and/or incarceration may be levied for non-
compliance.
These units must be installed as part of a
matched system as specied in the Product
Specications (EHB) bulletin.
CAUTION
As with any mechanical equipment, contact
with sharp sheet metal edges can result in
personal injury. Take care while handling this
equipment and wear gloves and protective
clothing.
©2018 Lennox Industries Inc. Dallas, Texas, USA
VRF

Summary

VRB Heat Recovery Installation and Operation

Safety Requirements and Model Identification

Safety Requirements

Critical safety warnings related to electrical shock, fire, and explosion hazards.

Model Number Identification

Explanation of the model number nomenclature for VRF systems.

Outdoor Unit Placement Considerations

Clearances and Obstructions

Maintenance and Service Clearance

Required space for accessing the outdoor unit for maintenance and service.

Perimeter Obstructions

Guidelines for managing obstructions around the outdoor unit's perimeter.

Obstructions Above the Unit

Guidelines for managing obstructions located above the outdoor unit.

Cold Climate Installation Considerations

Roof Overhang and Snow Drifts

Avoiding locations prone to ice, water, or snow accumulation near the unit.

Weather Resistant Support

Ensuring the unit is securely mounted to withstand environmental conditions.

Protect Unit from Prevailing Winds

Air Discharge Duct Requirements

Specifications and guidelines for installing air discharge ducts.

Outdoor Unit Installation and Mounting

Main;Sub Outdoor Unit Placement

Guidelines for arranging multiple outdoor units in a system.

Slab or Roof Mounting

Requirements for installing the unit on a concrete slab or roof structure.

Securing Outdoor Unit to Structure

Refrigerant Piping and Connections

Maximum Refrigerant Pipe Lengths and Height Differences

System Pressure Testing and Evacuation

Triple Evacuation Procedure

Additional Refrigerant Charge Calculation

Liquid Line Calculation Method

Outdoor Unit Charge Calculation

Mode Selection Box Charge Calculation

Connecting Manifolded Units

Connecting Mode Selection Boxes

Wiring Connections and Safety

Installation Settings and Service Procedures

Dip Switch and Dial Settings

Service Mode Operations

Configuration Settings and Options

Outdoor Unit Configuration

Indoor Unit Quantity Configuration

Network Address Settings

System Settings and Functions Overview

Service Mode Functions

Refrigerant Recycle Functions

Demand Control and Snow Mode

Address Mode Settings

Electrical Installation and Power Wiring

Troubleshooting and Error Codes

Digital Display Error Code Definitions

Explanations of error codes displayed on the unit.

Technical Support Information

Lennox VRB192 Specifications

General

Brand	Lennox
Model	VRB192
Category	Heating System
Language	English