Lennox VRF V22A Series Installation Instruction Download Page 21

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Technical Support

1-844-GET-VRF1
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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...