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©2018 Lennox Industries Inc. Dallas, Texas, USA

INSTALLATION
INSTRUCTION 

THIS MANUAL MUST BE LEFT WITH THE OWNER 
FOR FUTURE REFERENCE

Shipping and Packing List 

Check the components for shipping damage. If you find 

any damage, immediately contact the last carrier.

Package 1 of 1 contains the following:

1 - Assembled indoor compact cassette unit base

8 - Nuts

8 - Washers

4 - Cover panel screws

5 - Wire ties

1 - Condensate drain flexible pipe

1 - Condensate drain insulation sleeve

1 - Clasp

1 - Connector for electronic expansion valve and liquid line

1 - Cable

1 - Resistor

1 - Brass flare nut

1 - Template

1 - Installation manual

NOTE - Assembled indoor unit cover panel is required for 
complete installation and must be ordered separately.

General

The V22A compact 360º cassette indoor units are matched 
with an outdoor heat recovery or heat pump unit to create 

a VRF (variable refrigerant flow) system that uses HFC-

410A refrigerant. V22A indoor units are designed for 
indoor installation only. 

Refer to the Product Specification bulletin (EHB) for the 

proper use of these indoor units with specific heat pumps, 

heat recovery units, mode switching devices, branch 
pipes, line sets and controls.

These instructions are intended as a general guide and 
do not supersede local or national codes in any way. 
Authorities having jurisdiction should be consulted before 
installation.

V22A Compact 360º Cassette Units

These instructions are intended as a general guide and do 
not supersede local codes in any way. Consult authorities 
having jurisdiction before installation.

 WARNING

Improper installation, adjustment, alteration, ser vice or 
maintenance can cause property damage, personal 
injury or loss of life.
Installation and service must be performed by a li censed 

professional HVAC installer, service agency or the gas 

supplier.
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-specified parts.

Do not use this system if any part has been under water. 

A  flood-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.

VRF SYSTEMS -- Indoor Units

507442-04
11/2018

 IMPORTANT

The Clean Air Act of 1990 bans the intentional venting 

of refrigerant (CFCs, HCFCs and HFCs) as of July 1, 

1992. Approved methods of recovery, recycling or 
reclaiming must be followed. Fines and/or incarceration 
may be levied for noncompliance. These units must be 

installed as a part of a matched system as specified in 

the Product Specifications (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.

VRF

Summary of Contents for VRF V22A Series

Page 1: ...persede local codes in any way Consult authorities having jurisdiction before installation WARNING Improper installation adjustment alteration ser vice or maintenance can cause property damage persona...

Page 2: ...voided NOTE Only Lennox VRF indoor units will work with Lennox VRF outdoor units and associated mechanical equipment Lennox Mini Split indoor units are similar in appearance but must not be connected...

Page 3: ...NNECTION 2 3 8 60 LIQUID PIPE GAS PIPE 20 1 2 521 Hook Location 22 5 8 575 Body 25 1 2 648 Panel 21 1 2 545 Hook Location 22 5 8 575 Body 25 1 2 648 Panel 10 3 8 264 2 51 ELECTRONIC EXPANSION VALVE DR...

Page 4: ...the weight of the unit the unit could be fall out of place and cause serious injury Use the provided and specified components when installing equipment Failure to do so may result in unit falling wat...

Page 5: ...securely in place to accept the threaded rods NOTE Threaded rod requirement of Lennox warranty program is the ONLY acceptable method of suspending the unit do not use chains or straps See Figure 1 L t...

Page 6: ...piping before it is connected 2 Slowly loosen one of the flare nuts to release the factory nitrogen charge 3 Remove the flare nuts from the connections on the unit and discard the seal from each of th...

Page 7: ...red connections should always be accessible and must be insulated to prevent condensation Outside Diameter Recommended Torque No torque wrench available Finger tighten and use an appropriately sized w...

Page 8: ...1 4 inch per foot and that each individual drain is connected to the main drain exactly as shown 5 Drain should be as short as possible and should not have any droops or kinks that would restrict con...

Page 9: ...m circuit ampacity and maximum overcurrent protection size 1 Remove the screws that secure the control box cover Remove the cover and place it to the side where it will not be damaged CAUTION This uni...

Page 10: ...L1 L2 L3 L1 L2 L1 L2 Single Phase power wiring PQE PQE Indoor units and MS boxes on the same refrigeration circuit should have a common power supply but must have an independent disconnect switch ins...

Page 11: ...11 Figure 11 Typical Communication Wiring Diagram VRF Heat Recovery System NOTE Each communication wire from the MS box should follow the refrigerant piping for that port...

Page 12: ...not be properly tightened If the terminal screws are over tightened screws might be damaged Refer to the table below for the tightening torque of the terminal screws After wiring confirm all connecti...

Page 13: ...LEVEL SWITCH CS T2B T2 TR FM XS1 9 XP1 9 T1 C KEY XT1 2 EEV COMPONENT INDOOR FAN ELECTRONIC EXPANSION VALVE INLET AIR TEMP COIL TEMP FAN CAPACITOR TRANSFORMER TERMINAL BLOCK EVAP OUTLET TEMP IN COOLIN...

Page 14: ...shown Figure 14 Typical Outside Air Diverter Remove Screw Figure 16 Typical Outside Air Supply Channel with Styrofoam Plug Removed 3 Make sure the outside air supply channel is clear of styrofoam and...

Page 15: ...nstalled 2 Identify and measure the supply air opening that will be blanked off See figure 18 3 Prepare the blocking material Cut a piece of styrofoam or other non conductive material to fit the suppl...

Page 16: ...16 Figure 19 Three way Outlet Possible Flow Patterns Figure 20 Two way Outlet Possible Flow Patterns...

Page 17: ...the duct knockouts can be used 1 Decide which side of the cassette body will be ducted 2 Seal the supply air outlet on the side to which the duct will be attached See the Supply Air Configurations se...

Page 18: ...flow will be blocked and the harness plugs from the panel to the cassette base will not be long enough to plug together See Figure 24 4 Connect the six pin harness plugs from each of the two swing mot...

Page 19: ...1 7 The middle evaporator temperature T2 8 The evaporator outlet temperature T2B 9 Error code 10 Use the Spot Check Performance tables below and the Manual button on the unit receiver to view diagnost...

Page 20: ...ing mode Timer LED is Active Fan coil is under timer control Operation And Timer LED Flash Fast Fan coil unit has no registered address upon receiving a power supply Timer LED Flashes Fast Communicati...

Page 21: ...21 Technical Support 1 844 GET VRF1 1 844 438 8731 vrftechsupport lennoxind com www LennoxVRF com Download the app from the Apple App Store or the Google Play store...

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