Lennox VRF V22B Series User manual

1
VWMB
Wall-Mounted Non-Ducted Unit
V22B
Compact 360° Cassette
V33B
360° Cassette
VMDB
Medium-Static Concealed Duct Unit
VHIB
High-Static Concealed Duct Units
VCFB
Ceiling- or Floor-Mounted
Non-Ducted Unit
VVCB
Air Handler
USER’S MANUAL
VRF SYSTEMS -- Indoor Units
507922-02
05/2019
VRF Indoor Units
THIS MANUAL MUST BE LEFT WITH THE OWNER
FOR FUTURE REFERENCE
VRF
©2018 Lennox Industries Inc. Dallas, Texas, USA
VOWA
One-Way Cassette
VOSB
Outside Air Unit

2
Safety Requirements
WARNING
!
ELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD.
If you do not follow these instructions exactly, a re or explosion may result causing property dam age, personal
injury or death.
Failure to follow safety warnings exactly could result in dangerous operation, serious injury, death or property
damage.
Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be performed by a licensed professional HVAC installer (or
equivalent), or a service agency.
Any additions, changes, or conversions required in order for the appliance to satisfactorily meet the application
needs must be made by a licensed professional installer (or equivalent) using factory-specied parts.
This unit must be properly grounded. The ground wire for the unit must not be connected to a gas or water pipe,
a lightning conductor or a telephone ground wire.
Do not use this system if any part has been underwater. A ood-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.
Refrigerant leaks are unlikely; however, if a refrigerant leak occurs, open a door or windows to dilute the refrigerant
in the room. Turn o󰀨 the unit and all other appliances that may cause a spark. Call a licensed professional HVAC
technician (or equivalent) to repair the leak.
DO NOT spray water on the indoor unit for any reason.
Do not touch the unit or the controller if your hands are wet.
Do not replace a fuse with a fuse of a di󰀨erent 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 remove the outdoor unit fan guard for any reason.
CAUTION
!
If outdoor unit is installed on a raised stand, check condition of stand occasionally to ensure that it remains
stable.
Do NOT install sprinklers or soaker hoses where they can expose the outdoor unit to treated water. Prolonged
exposure to treated water will corrode the surface of the steel and aluminum parts and will diminish the
performance of the unit.
Do not place items which may be damaged by water under or around the indoor unit.
Ensure that the condensate drain is properly routed to a drain.
Important Operating Instructions
System operation is controlled by either a wired remote
controller or a wireless remote controller. Refer to the manual
provided with the control for system operation.
To ensure comfort, make sure that temperature selection has
been properly set at the unit controller or remote control.
To ensure e󰀩cient operation, do not block air intake or outlet
at either the indoor or outdoor unit.
Do not stand on outdoor unit or store items on top of unit.
Make sure that indoor unit directional louvers are properly
adjusted.
IMPORTANT!

3
Parts Arrangement - Non-Ducted Indoor Units
V22B or V33B Cassette
Cassette may be adjusted to provide discharge
air from one, two, three or four sides.
GROUNDING SCREW
(In control box)
RETURN AIR
AIR FILTER
DIFFUSER LOUVER
ADJUSTMENT LEVER
VCFB
Ceiling- or Floor-Mounted Non-Ducted Unit
RETURN AIR
DISCHARGE AIR LOUVER
AIR FILTER
VWMB
Wall-Mounted Non-Ducted Unit
RETURN AIR
GROUNDING SCREW
(In control box)
DISCHARGE AIR LOUVER
AIR FILTER
(Open front cover)
VOWA
One-Way Cassette
DISCHARGE AIR LOUVER
AIR FILTER
(Open return air grille)
RETUN AIR GRILLE
Slide to release
return air grille
Lift tab
to remove
filter

4
Parts Arrangement - Ducted Indoor Units
VMDB
Medium-Static Concealed Duct
RETURN AIR
(Filter)
CONTROL BOX
DISCHARGE AIR
VHIB
High-Static Concealed Duct
RIGHT SIDE VIEW
LIQUID PIPE
GAS PIPE
AIR FLOW
SUPPLY
AIR DUCT
OPENING
AUXILIARY
DRAIN
CONNECTION
(Either Side)
PRIMARY
DRAIN
CONNECTION
(Either Side)
RETURN
AIR DUCT
OPENING
VOSB
Outside Air Unit
and
AIR FLOW
COIL
COMPARTMENT
BLOWER
COMPARTMENT
CONDENSATE
DRAIN
FILTER ACCESS
VVCB
Air Handler

5
Louver Adjustments
CAUTION
!
DO NOT adjust the louvers by hand. Louvers are
adjustable only by using the wired controller or
remote control.
V22B or V33B Ceiling-Mounted Cassettes
Adjust the discharge air louvers to direct air downward
during heating and outward during cooling.
Heating operation
Adjust louvers downward.
Cooling operation
Adjust louvers outward.
VWMB Wall-Mounted Units
Use the wired controller or the remote control to set the
position of the discharge air louvers. The louvers may
be set to automatically swing between the outward and
downward positions, OR you may set the louvers so
that they are stationary in a single position. It is always
recommended to direct the horizontal discharge air louvers
downward during heating and outward during cooling.
VCFB Ceiling- or Floor-Mounted Units
Use the wired controller or the remote control to set
the position of the discharge air louvers. The louvers
may be set to automatically swing. In this setting,
horizontal louvers will swing outward to downward
and vertical louvers will swing left to right. You may
also set the louvers so that they are stationary in a
single position. It is always recommended to direct
the horizontal discharge air louvers downward during
heating and outward during cooling.
Heating operation
Set horizontal louvers downward.
Cooling operation
Set horizontal louvers outward.
Auto-swing operation
Sets louvers to pivot up and down automatically.
Heating operation
Set horizontal louvers downward.
Coolingoperation
Set horizontal louvers outward.
Auto-swing operation
Sets louvers to pivot up and down automatically.

6
The VVCB return air lter access is shown on the parts
arrangement illustration on page 3. Remove the two
screws that secure the lter access cover to the unit
cabinet. Remove the cover and slide the lter out of the
cabinet.
The VMDB and VHIB return air lter is segmented to allow
it to be removed in tight spaces.
Maintenance
WARNING
!
ELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD.
Before performing any maintenance, power to unit
must be o󰀨 at the unit disconnect switch.
CAUTION
!
Check wiring for signs of loose connections.
Use a clean, dry cloth to wipe the remote control.
Never use a damp or wet cloth to clean the remote
control.
Use a clean, dry cloth to wipe the indoor unit. If
necessary, dampened cloth may be used.
Do not use a chemically treated dust cloth on either
the indoor unit or remote control.
Do not use benzene, paint thinner, polishing powder
or similar products to clean the indoor unit or control.
These substances may cause the plastic surface to
crack or become damaged.
Return Air Filters
Blocked or dirty return air lters a󰀨ect system oper ation
and e󰀩ciency. Air lters should be checked monthly in
order to ensure proper air ow to the in door unit. It may be
necessary to check the lter more frequently if the unit is
installed in an area with a large amount of dust.
The lter may be removed and cleaned, or it should be
replaced with a lter of like kind and size if it is impossible to
clean the lter. Refer to the parts ar rangement illustrations
to locate the lter in your indoor unit.
VOWA
One-Way Cassette
DISCHARGE AIR LOUVER
AIR FILTER
(Open return air grille)
RETUN AIR GRILLE
Slide to release
return air grille
Lift tab
to remove
filter
The VOWA lters are accessed through the re turn air grille
as shown in these illustrations.
Preparing Unit for Prolonged Idle Periods
The unit must be prepared before lengthy periods of
inactivity:
• Set the controller so that the indoor unit operates in
the fan only mode for 8 to 12 hours.
• Thoroughly clean and replace return air lters.
• Use a clean, dry cloth to wipe cabinets.
• Turn the unit OFF at the wired controller or remote
control; then, disconnect power to the unit.
• Remove batteries from the remote control.
Returning the Unit to Operation after Prolonged Idle
Periods
If the unit has been inactive for an extended period of time,
it must be prepared for operation:
• Properly clean and replace return air lters.
• Use a clean, dry cloth to wipe unit front panels.
• Insert batteries into the remote control.
• If power was disconnected, reconnect power to the
unit for at least 12 hours before returning the unit to
operation.

7
Simultaneously slide grille release
latches toward the middle as shown
Pivot hinged grille downward
Lift filter up and out to remove
it from the unit.
The filter may be cleaned using either a
vacuum cleaner or with clean water.
Filter Cleaning
Filter should be held
with the air entering side
face up when using a
vacuum cleaner.
The filter should be held with
the air entering side face down
when using clean water to wash
the filter.
Filter should be set aside to air
dry after cleaning. Do not
place filter in direct sunlight
or use any type of heat to dry
the filter.
NOTE - If filter is extremely
dirty, it may be necessary to
tergent for cleaning. Filter must
be thoroughly rinsed and dried.
Spigot or
water hose
Filter
Vacuum
cleaner
Filter
The V22B and V33B lters are accessed through the re
turn air grille as shown in these illustrations.
V33B Ceiling Cassettes
V22B Ceiling Cassettes

8
Troubleshooting
WARNING
!
ELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD.
ever attempt to repair the indoor or outdoor unit yourself. System repairs must be performed by a licensed
professional HVAC technician (or equivalent).
If any of the following conditions exist, immediately turn the system (indoor and outdoor units) o󰀨 at the unit
disconnect switch and call a licensed professional HVAC technician (or equivalent) for repairs:
• The system does not receive a signal from the remote control or wired controller.
• The remote control or wired controller indicate a system malfunction.
• Water is leaking into the room from the indoor unit.
• The circuit breaker trips or the fuse blows frequently.
• Water or some other liquid has been spilled on or splashed into the indoor unit.
NORMAL OPERATION
If none of the above conditions exist, check the
following items before calling for repairs. This can
save you both time and money. The following are
signs of normal system operation.
System does not operate on command
The indoor fan does not start immediately after the ON/
OFF button on the remote control is pressed.
• On an initial call for cooling, the operation/run light is lit
to signal normal operation. There will be a delay after
a cooling demand is introduced before unit operation
begins. This delay protects the unit compressor and
is normal.
• When a heating demand is initiated, the operation
light is lit to signal normal operation. The PRE-DEF
indicator may be lit as well. The indoor unit fan will
not operate until the indoor coil reaches a pre-set
temperature. This prevents the delivery of cold air into
the space and is normal.
Indoor fan is on; compressor is o󰀨
In certain normal operating modes, the indoor fan is on
when the compressor is not operating.
• The system turns the compressor o󰀨 and leaves the
indoor fan on when the indoor coil falls to a preset
temperature. This is normal operation and will prevent
the indoor coil from freezing.
• When the indoor fan is set for continuous operation,
the fan continues to run when the temperature setting
is reached and the compressor is de-energized.
White mist comes out of the indoor unit
• During cooling operation, if the indoor relative
humidity is very high and the indoor unit discharge
air louvers are very dirty, the indoor coil may freeze
and a white mist (frozen vapor) may appear to come
from the indoor unit. In this case, though the unit is
not in need of repair, it does need to be cleaned
by a licensed professional HVAC technician (or
equivalent).
• During heating operation when the operation
mode switches from defrost to heating, moisture
generated by the defrost process becomes steam and
may be seen as it is blown out of the indoor unit.
Sounds can be heard near the indoor unit
During certain parts of the heating or cooling process,
low swishing or groaning sounds may be heard near the
unit as the system pressures equal ize. This is a normal
occurrence.

9
The table below lists possible causes and solutions to some of the most common problems. Please review this information
before calling for service.
Symptom Possible Cause Possible Solution
Unit does not start.
• Power failure.
• Power to unit is OFF or disconnected.
• Circuit breaker may be tripped or
fuse may be blown.
• Remote control batteries may have
lost their charge or unit controller
may have malfunctioned.
• Wait for power to be restored.
• Turn on or reconnect power to the unit.
• Reset circuit breaker or replace fuse.
• Replace batteries in remote control.
Check controller for proper function.
Indoor fan is operating;
however, air is not cool.
• Temperature not properly set at con-
trol.
• Compressor may be kept o󰀨 by delay.
• Check temperature setting at control.
• Wait for delay to expire.
Unit cycles on and o󰀨 frequently.
• Refrigerant charge is incorrect.
• Air in refrigerant circuit.
• Compressor malfuction.
• Improper voltage.
• System refrigerant circuit is blocked.
• Check for refrigerant leaks and prop-
erly charge system.
• Evacuate and properly charge system.
• Check compressor and replace, if ne-
cessary.
• Check with utility company to provide
proper voltage.
• Clear blockage.
Unit not cooling properly.
• Indoor and/or outdoor coil are dirty.
• Air lter is dirty.
• Air ow around indoor and/or outdoor
unit is obstructed.
• Doors and/or windows are open.
• Direct sunlight is a󰀨ecting indoor
temperature.
• Heat source inside is placing a large
burden on the system.
• Suction pressure is low due to
possible refrigerant leak.
• Clean indoor and/or outdoor coil.
• Clean or replace air lter.
• Remove obstructions.
• Close doors and windows.
• Use curtains or blinds to block direct
sunlight.
• Reduce burden of heat source.
• Check for refrigerant leaks and prop-
erly charge system.
Unit not heating properly.
• Doors and/or windows are open.
• Suction pressure is low due to
possible refrigerant leak.
• Close doors and windows.
• Check for refrigerant leaks and prop-
erly charge system.
Fan speed cannot be changed.
• Check the mode listed on the unit dis-
play. Fan speed cannot be changed
in the AUTO or DRY mode.
• Fan speed cannot be changed in
AUTO or DRY mode. Change mode to
COOL, FAN ONLY or HEAT.
Remote control signal is not
being transmitted, even when
ON/OFF button is pressed.
• Batteries may have lost their charge. • Replace batteries.
The TEMP adjustment indicator
is not available.
• Check the mode listed on the unit
display. Temperature cannot be
adjusted in the FAN ONLY mode.
• Change the mode to COOL, HEAT or
D R Y.
Operation indicator disappears
from the display after a period
of time.
• Check to see if display reads TIMER
OFF.
• Timed operation is terminated at the
end of the TIMER period.
TIMER ON disappears from the
display after a period of time.
• Check to see if display reads TIMER
OFF.
• Timed operation is terminated when
time period has expired.
No tones being sounded by
indoor unit, even when ON/OFF
button is pressed.
• Infra-red receiver must be able to see
signal from remote control.
• Batteries may have lost their charge.
• Aim remote control infra-red transmit-
ter directly at receiver.
• Replace batteries.

10
Error Codes
Indoor units are equipped with either a small panel with four LEDs that ash to indicate system errors or a digital display
that provides an error code. Refer to the appropriate table below to view the error codes. If the unit has a digital display, the
error code will replace the temperature setting displayed on the front cover of the indoor unit. If more than one error has
occurred, the codes will alternate so that all codes are shown. Make note of the code (E1, EE, etc.), then reset the display
by pressing the ON/OFF button on the wireless remote controller. Press the ON/OFF button a second time to reapply
power to system. If code is still displayed, disconnect and restore power at the unit disconnect switch or circuit breaker.
If the problem was temporary, the code will not reappear. If the error code reappears after power has been broken and
restored at the disconnect switch or circuit breaker, call a licensed professional HVAC service technician.
V22B, VMDB, VHIB, VOSB VVCB
VWMB
V33B
VCFB
VOWA