Table of Contents
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©2018 Lennox Industries Inc. Dallas, Texas, USA
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.
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.
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
1
INSTALLATION
INSTRUCTION
V22B Compact 360º Cassette Units
VRF SYSTEMS -- Indoor Units
507888-02
01/2019
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.
General
The V22B 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 R-410A
refrigerant. V22B 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.
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
1 - Installation Manual
2 - Nuts
1 - Input connection pipe
1 - Output connection pipe
1 - Accessory package of condensate drain flexible pipe
1 - Installation manual
NOTE - Assembled indoor unit cover panel is required for
complete installation and must be ordered separately.
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Table of Contents
Related Manuals for Lennox VRF V22B Series
Summary of Contents for Lennox VRF V22B Series
- Page 1 INSTALLATION INSTRUCTION V22B Compact 360º Cassette Units ©2018 Lennox Industries Inc. Dallas, Texas, USA VRF SYSTEMS -- Indoor Units 507888-02 01/2019 IMPORTANT The Clean Air Act of 1990 bans the intentional venting of refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992.
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Page 2: Safety Requirements
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 to a Lennox VRF refrigerant circuit. Please refer to model numbers to confirm compatibility. Model numbers for Lennox VRF units start with a “V”... -
Page 3: Unit Dimensions - Inches (Mm)
Unit Dimensions - inches (mm) 6-1/2 (279) (165) (635) 21-1/2 (545) (Hook-Location) 22-5/8 (575) (Body) 25-1/2 (648) (Panel) TOP VIEW 2 (51) ELECTRICAL 10-3/8 CONTROL (264) LEFT SIDE VIEW SIDE VIEW RIGHT SIDE VIEW 2-1/2 (64) DRAIN LINE VOLTAGE INLET 6 (152) dia. - Page 4 Clearances (914) (914) (914) (914) Minimum Vertical Clearances: Minimum Clearance from Structural Ceiling to Drop Ceiling: 10-1/4 inches (260 mm) - 007, 009, 012, 015 models Minimum Clearance to Floor: 90 inches (2286 mm) Minimum Service Clearance for refrigerant and drain lines - 24 inches (610 mm) Typical cassette body shown, actual unit may vary.
- Page 5 Locate the unit so that it is not exposed to direct securely in place to accept the ⅜” threaded rods. sunlight. NOTE - Threaded rod (requirement of Lennox • Locate the indoor unit so that the room can be warranty program) is the ONLY acceptable method uniformly cooled.
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Page 6: Refrigerant Piping Connections
7. Access is required during the commissioning process IMPORTANT to test the condensate disposal system (See Figure 8), to check flare nuts , and to check the local disconnect. compressor this unit contains Ceiling framing should not restrict access. (Polyvinylether). formulated hydrofluorocarbon (HFC) refrigerants, such as R-410a, Refrigerant Piping Connections... - Page 7 IMPORTANT IMPORTANT Always use two wrenches when tightening flare nuts to Flared connections should always be accessible and avoid twisting refrigerant piping. DO NOT over-tighten must be insulated to prevent condensation. See Figure flare nuts. 6. Align the threaded connections with the flared refrigerant lines.
- Page 8 Condensate Piping Connections 4. See Figure 7 for applications including multiple units CAUTION using the internal pump to provide lift into a single, correctly sized main drain. In this case, ensure that Make sure that drain piping is properly routed the main drain line is properly sloped (no less than and insulated in order to prevent both leaks and 1/4 inch per foot) and that each individual drain is...
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Page 9: Wiring Connections
IMPORTANT (Remove for test) Drain should have a slope of at least ¼ inch per foot and should be approved corrosion-resistant pipe. You must confirm operation of every drain and pump in the system Cassette Base as part of the commissioning procedure. Pour water here for test Drain Pan... - Page 10 Indoor units and mode selection boxes on the same maintenance purposes. Indoor unit and mode selection refrigeration circuit should have a common power supply box power supply MUST not be taken from the outdoor but must have an independent disconnect switch installed unit.
- Page 11 Outdoor unit Outdoor unit Outdoor unit (sub1 unit) (main unit) (sub2 unit) H1 H2 Outdoor Unit Communication Terminal Block (H1 H2 (H1 H2 (H1 H2 (PQ) (PQ) (PQ) (PQ) MS Box Communication Terminal Block HA HB 12V COM P (PQ) (PQ) Indoor Unit Communication Terminal Block Ground cable shield...
- Page 12 Outdoor unit Outdoor unit Outdoor unit (main unit) (sub1 unit) (sub2 unit) (H1 H2 (H1 H2 (H1 H2 H1 H2 Outdoor Unit Communication Terminal Block (PQ) HA HB 12V COM P Indoor Unit Communication Terminal Block Ground cable shield (PQ) to Indoor Unit chassis Install a terminating resistor (Ω120) at the last indoor unit terminals P and Q of the daisy chain.
- Page 13 Code Title To wired Indoor fan motor controller comm. bus Room temperature sensor WHITE Inlet of evaporator sensor BLUE To wired NOTE: NOTE: Outlet of evaporator sensor controller 1. Refer to manual for communication Component in dash line is power wiring Middle of evaporator sensor optional or field wiring...
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Page 14: Outside Air Connection
Outside Air Connection A limited amount of filtered outside air can be brought into the cassette unit [through the 2-1/2 inch (64 mm)] outside air knockout to be conditioned and mixed into the supply air. 1. Remove the decorative cover panel if installed. 2. -
Page 15: Bottom View
Supply Air Configurations Supply air is typically provided from all four sides of the 4. Insert the blocking material into the supply air opening. cassette unit. See Figure 18. 5. Prepare the sealing material. Cut a piece of tape or If needed for the application, one or two sides of the other non-conductive sealing material to cover and cassette supply air can be blanked off to prevent air flow... - Page 16 Figure 18. Possible Air Flow Patterns Supports Supply Duct 10 feet maximum Drop Ceiling Seal supply air outlet on duct side NOTE - The secondary supply duct must be 4 or 6 inches in diameter and 10 feet or less in length (including transitions).
- Page 17 Cassette Cover Panel Installation NOTE - Cover panel must be ordered as a separate accessory. 1. Carefully remove the cassette cover panel from its protective packaging and place the panel diffuser- side-out on a clean, level surface. Drain side CAUTION Steel rope Do not place the cover panel with the diffusers face down on the floor or other surface.
- Page 18 Network Address and Commissioning After the system has been installed, each indoor unit must be assigned an address as part of the commissioning procedure. Spot Check Instructions Use the Spot Check Performance tables below and the Manual button on the unit receiver to view diagnostic information the indoor unit.
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Page 19: Troubleshooting
Troubleshooting Digital Display Make note of the code (E1, EE, etc.), then reset the display by pressing the ON/OFF button on the unit controller. The indoor unit is equipped with a receiver that has a digital Press the ON/OFF button a second time to reapply power display that provides an error code. - Page 20 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.