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6

2.  Cut a hole in the wall using a suitable hole saw. Hole 

should be at a slight downward slant - 3/16” to 3/8” 

toward the outdoor side.

Wall Sleeve Installation

The utility bundle may be routed out of the back of the unit 

or out either side. If the bundle is to be routed out the back 

through an external wall, use a field-provided wall sleeve 

to protect the utility bundle. 

NOTE - 

If the utility bundle will 

be routed out the side of the indoor unit and up the wall 

above a false ceiling, continue to the next section.

1.  Prior to making the hole and installing the wall sleeve 

for the utility bundle, check to ensure that there are 

no other utilities located in the wall behind the hole 

location.

3.  Measure the thickness of the wall from the inside 

edge to the outside edge and cut the field-provided 

wall sleeve at a slight angle 1/4” (6 mm) shorter than 

the thickness of the wall.

Figure 3. Boring Hole for Wall Sleeve

USE SUITABLE TOOL TO CUT PVC FOR WALL

SLEEVE AT SLIGHT ANGLE AS SHOWN.

4.  Place the provided plastic cover over the end of the 

pipe that will be visible from the inside wall and insert 

the pipe in the wall.

NOTE - 

When passing bundled services through an 

exterior brick or concrete wall, protect the copper pipes 

and wiring from the effects of these construction materials 

by using a sleeve made of a suitable material. The integrity 

of copper pipe and wiring can deteriorate when exposed 

to these construction materials

USE SUITABLE TOOL TO CUT PVC FOR WALL

SLEEVE AT SLIGHT ANGLE AS SHOWN.

Figure 4. Cutting PVC for Wall Sleeve

Install Unit on Wall Mounting Plate

1.  A length of field-provided flexible condensate piping 

should be connected to the drain prior to securing the 

unit to the wall mounting plate.

2.  If the factory-provided refrigerant piping connections 

and field-provided flexible condensate piping are long 

enough to enable final field connections after unit is 

installed  on  wall  mounting  plate,  use  field-provided 

tape to bundle them together.

3.  The utility bundle may be routed out of the back of the 

unit or out either side. If  the  bundle is to be  routed  

out the back through an  external wall, feed  the  utility  

bundle through the  wall sleeve.  If the utility bundle is 

to be routed out of the side of the indoor unit and up 

an inside wall, carefully form the utility bundle so that 

it makes a gentle 90° turn.

4.  Align the back of the indoor unit with the hooks at the 

top of the wall mounting plate. Move the unit from side 

to side to make sure that it settles securely.

5.  The bottom of the unit can be lifted to facilitate 

refrigerant piping and condensate drain connections, 

if necessary. See figure 6. 

TEMPORARY

SPACER

(To facilitate

connections)

HOOKS AT TOP

OF MOUNTING

BRACKET

Figure 6. Secure Unit to Wall Mounting Plate

 

WARNING

Electric  Shock  Hazard.  Can  cause  injury  or  death. 

Avoid location where electric wiring or conduits may be 

present inside the wall.

Summary of Contents for VRF VWMB Series

Page 1: ...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 tio...

Page 2: ...se of a different rating Do not use a jumper wire to replace a fuse Do not insert your hands tools or any other item into the air intake or air outlet at either the indoor or outdoor unit Do not allow...

Page 3: ...879 39 991 12 3 8 314 7 1 2 191 4 1 2 114 VWMB007H4 VWMB009H4 VWMB012H4 VWMB015H4 VWMB018H4 27 686 BOTTOM VIEW SIDE VIEW SIDE VIEW 8 7 8 225 42 1 2 1080 47 1194 13 1 2 343 10 3 8 264 VWMB024H4 VWMB030...

Page 4: ...t of the unit Install the indoor unit a minimum of 3 feet away from any antenna power cord line radio telephone security system or intercom Electrical interference and radio frequencies from any of th...

Page 5: ...e installed level on the wall to allow proper condensate drainage 1 Use a carpenter s level or measuring tape to verify the wall mounting plate is horizontally level 2 Secure the wall mounting plate t...

Page 6: ...of copper pipe and wiring can deteriorate when exposed to these construction materials USE SUITABLE TOOL TO CUT PVC FOR WALL SLEEVE AT SLIGHT ANGLE AS SHOWN Figure 4 Cutting PVC for Wall Sleeve Insta...

Page 7: ...connections should always be accessible and must be insulated to prevent condensation 9 After refrigerant piping has been installed and checked for leaks apply insulation over the connector pipe and a...

Page 8: ...ll drain freely 4 After system installation is complete the condensate drain line must be checked for leaks This check is part of the commissioning sequence If a field provided condensate pump has bee...

Page 9: ...X87 721 14T69 3 7 23 16 5 ft VWMB024H4 VWMB030H4 MaxiBlue w DrainStik X87 722 17A23 3 7 23 16 5 ft Optional pump maximum suction lift is measured from the pump outlet Table 3 Condensate Pump Accessory...

Page 10: ...tdoor Unit Main Unit L1 L2 L3 Outdoor Unit Sub1 unit L1 L2 L3 Outdoor Unit Sub2 Unit L1 L2 L3 L1 L2 L3 L1 L2 L3 L1 L2 L3 L1 L2 L3 L1 L2 L3 L1 L2 L3 Service Disconnect Service Disconnect Service Discon...

Page 11: ...olarity sensitive Typical Wiring Diagram NEC CEC and Local Codes apply Outdoor unit Outdoor unit sub1 unit Outdoor unit sub2 unit PQ main unit PQ MS Box PQ PQ MS Box PQ PQ H1 H2 H1 H2 H1 H2 Outdoor Un...

Page 12: ...agram VRF Heat Pump System NOTE PQE Communication wiring is daisy chained from the outdoor unit to each indoor unit in one continuous run Tightening torque for the terminal screws Use the correct scre...

Page 13: ...WIRING Display panel To Outdoor COMM BUS To wired Controller COMM BUS HA HB COM P 12V Q GRAY YELLOW BLUE WHITE BLACK RED HHE interface FAN CTON HTON AUXH NET0 NET1 Current range 0 1A Voltage range 0...

Page 14: ...HITE BLACK RED NOTE COMPONENT IN DASH LINE IS OPTIONAL OR FIELD WIRING NOTE 1 REFER TO MANUAL FOR COMMUNICATION WIRING 2 PLEASE USE THE 3 CONDUCTOR SHIELDED CABLE T2A T2 T1 T2B RED WHITE BLUE BLACK Di...

Page 15: ...le Spot Check Instructions This Spot Check Performance table is located on the unit service panel The diagnostic information can also be obtained using the wired remote controller No Content Recorded...

Page 16: ...codes The error code will replace the temperature setting displayed on the receiver If more than one error has occurred the codes will alternate so that all codes are shown Figure 32 Receiver Display...

Page 17: ...17 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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