Lennox VRB144 - 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

Safety and Installation Prerequisites

Safety Requirements and Warnings

Critical safety instructions for installation, service, and operation to prevent injury or damage.

Model Number Identification

Outdoor Unit Installation and Placement

Outdoor Unit Placement Considerations

Guidelines for selecting an optimal location, considering clearances and environmental factors.

Installation Clearances and Obstructions

Cold Climate Installation Guidance

Air Discharge Duct Installation

Refrigerant Piping and System Charging

Refrigerant Piping Connections

Safety warnings and best practices for making refrigerant piping connections.

Maximum Pipe Lengths and Height Differences

Permitted lengths and level differences for refrigerant piping systems.

Pipe Selection and Branch Kits

Additional Refrigerant Charge Calculation

Method for calculating and adding extra refrigerant charge to the system.

System Configuration and Wiring

Pressure Testing and System Evacuation

Procedures for pressure testing and evacuating the refrigerant system.

Connecting Manifolded Outdoor Units

Wiring Connections and Terminals

Instructions for making secure and correct electrical power and communication wiring connections.

Troubleshooting and Support

System Troubleshooting and Error Codes

A list of error codes and their corresponding definitions for diagnosing issues.

Lennox VRB144 Specifications

General

Brand	Lennox
Model	VRB144
Category	Heating System
Language	English