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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
V22A Compact 360º Cassette Units
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.
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.
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.
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Related Manuals for Lennox VRF V22A Series
Summary of Contents for Lennox VRF V22A Series
- Page 1 INSTALLATION INSTRUCTION V22A Compact 360º Cassette Units ©2018 Lennox Industries Inc. Dallas, Texas, USA 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.
- Page 2 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) LIQUID PIPE PIPE DRAIN CONNECTION 2-3/8 (60) 21-1/2 (545) (Hook-Location) 22-5/8 (575) (Body) 25-1/2 (648) (Panel) TOP VIEW 2 (51) 10-3/8 ELECTRONIC (264) EXPANSION VALVE DRAIN 2-9/16 (65) SIDE VIEW RIGHT SIDE VIEW CONNECTION FRESH AIR LEFT SIDE VIEW LIQUID PIPE...
- 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: 98-1/2 inches (2500 mm) Indoor Unit Placement Do not install the unit in an area where flammable WARNING CAUTION materials are present due to risk of explosion resulting...
- Page 5 Unistrut channel fixed securely in place to accept the ⅜” threaded conditioned. rods. NOTE - Threaded rod (requirement of Lennox • Locate the unit so that it is not exposed to direct warranty program) is the ONLY acceptable method of sunlight.
- Page 6 (Polyvinylether). formulated This will also allow access for future maintenance (requirement Lennox warranty program). hydrofluorocarbon (HFC) refrigerants, such as R-410a, Access is required during the commissioning process which this system contains. While it may have some...
- Page 7 IMPORTANT OUTLET Always use two wrenches when tightening flare nuts to CONNECTOR PIPE avoid twisting refrigerant piping. DO NOT over-tighten ELECTRONIC flare nuts. EXPANSION VALVE 6. Align the threaded connections with the flared refrigerant lines. Tighten the flare nuts lightly at first to REFRIGERANT PIPING obtain a smooth match (Figure 3-B).
- Page 8 Condensate Piping Connections 4. See Figure 8 for applications including multiple units CAUTION using the internal pump to provide lift into a single, Make sure that drain piping is properly routed correctly sized main drain. In this case, ensure that 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...
- Page 9 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 as part of the commissioning procedure. Cassette Base Pour water here for test...
- Page 10 Indoor units and MS boxes on the same refrigeration Indoor unit and MS box power supply MUST not be taken from the outdoor unit. Always follow NEC/CEC and Local circuit should have a common power supply but must have an independent disconnect switch installed adjacent Codes.
- Page 11 NOTE - Each communication wire from the MS box should follow the refrigerant piping for that port. Figure 11. Typical Communication Wiring Diagram (VRF Heat Recovery System)
- Page 12 Figure 12. Typical Communication Wiring Diagram (VRF Heat Pump System) Tightening torque for the terminal screws Table 3. Terminal Screw Tightening Torque Use the correct screwdriver for fighting the terminal • screws. If the screwdriver blade is too small, the head Tightening torque (lb-ft) of the screw might be damaged, and the screw will...
- Page 13 COMPONENT ALARM INDOOR FAN ELECTRONIC EXPANSION VALVE INLET AIR TEMP. EVAP OUTLET TEMP IN COOLING MODE COIL TEMP. XP1-9 PLUG JACK XS1-9 TRANSFORMER XT1-2 TERMINAL BLOCK WATER LEVEL SWITCH FAN CAPACITOR SWING MOTOR PUMP MOTOR YELLOW GROUND GROUND FAN CTON HTON AUXH HHE interface Current range (0~1A) Voltage range (0~AC/DC24V)
- Page 14 Outside Air Connection A limited amount of outside air can be brought into the cassette unit [through the 2-9/16 inch (65 mm)] outside air knockout to be conditioned and mixed into the supply air. 1. Remove the decorative cover panel if installed. 2.
- Page 15 Supply Air Configurations Supply air is typically provided from all four sides of the 1. Remove the decorative cover panel if installed. cassette unit. See Figure 18. 2. Identify and measure the supply air opening that will be blanked off. See figure 18. If needed for the application, one or two sides of the cassette supply air can be blanked off to prevent air flow 3.
- Page 16 Figure 19. Three-way Outlet Possible Flow Patterns Figure 20. Two-way Outlet Possible Flow Patterns...
- Page 17 Installation of Secondary Supply Duct A limited amount of conditioned air can be diverted 1. Decide which side of the cassette body will be ducted. through a small duct to a location outside of the zone. For 2. Seal the supply air outlet on the side to which the duct will be attached.
- Page 18 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 19 Network Address and Commissioning After the system has been installed, each indoor unit must NOTE - The indoor unit temperature unit display must be be assigned an address as part of the commissioning set at the same time as the controller. Indoor units default procedure.
- Page 20 Troubleshooting Flashing LED Display The indoor unit is equipped with a receiver that has a small panel with four LEDs that flash to indicate system errors. Refer to the table below to view the error codes. If more than one error has occurred, the codes will alternate so that all codes are shown.
- Page 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.