Lennox V0STAT51P-3 Installation instructions

1
INSTALLATION/
OPERATION
INSTRUCTIONS
CONTROLS
507900-01
03/2019
This manual must be left with the
owner for future reference.
WARNING
!
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 service
agency.
V0STAT51P-3 Touch Screen
Programmable Local Controller
General
The V0STAT51P-3 is a wired touch screen
programmable local controller for VRF Heat
Recovery and Heat Pump indoor units with
convenient timed schedules for daily operation.
These instructions are intended as a general
guide and do not supersede local codes in any
way. Consult authorities having jurisdiction be-
fore installation.
Shipping and Packing List
Package 1 of 1 contains;
1 – Wired Controller
1 – CR2032 Lithium battery
2 – Phillips screws
2 – Plastic spacers
2 – 1/8” polymer toggle anchors
1 – Installation and operation manual
Requirements
Be sure that power supply has been turned
o󰀨 before beginning installation. This control-
ler should be used only as described in this
manual.
Tools Needed
#2 Phillips screwdriver
Slotted precision screwdriver
Level
1/8” wall anchor tools
Controller Placement
Avoid installing local controller in high load
or heat loss areas such as exterior walls or
walls that are against unconditioned spaces,
near entry doors and windows, or where di-
rect sunlight may be present.
CAUTION
To ensure proper system performance and
reliability, Lennox does not recommend
operation of VRF systems during any phase
of construction. Construction debris, low
temperatures, harmful vapors, and operation
of the unit with misplaced lters can damage
the units. Failure to follow these guidelines
will result in the warranty being voided.
IMPORTANT
Frequent changes to operating mode
may cause system malfunction. Allow at
least one minute between mode changes
to allow the system to stabilize.
©2019 Lennox Industries Inc. Dallas, Texas, USA
VRF

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Contents
General........................................................................................................................................1
Requirements ..............................................................................................................................1
Shipping and Packing List ..........................................................................................................1
Tools Needed...............................................................................................................................1
Controller Placement ..................................................................................................................1
Installation ...................................................................................................................................4
Connecting to One Indoor Unit............................................................................................5
Connecting to Multiple Indoor Units ....................................................................................6
Mounting the Controller .......................................................................................................7
Home Screen Display................................................................................................................10
Operation...................................................................................................................................14
ON/OFF.............................................................................................................................14
Error Code Display ............................................................................................................15
Mode Settings............................................................................................................................16
Cooling Mode Operation ...................................................................................................16
Heating Mode Operation ..................................................................................................17
Auto Mode Operation ........................................................................................................18
Dry Mode Operation ..........................................................................................................20
Fan-Only Operation...........................................................................................................21
Temperature Setpoint .......................................................................................................22
Space Temperature and Space Humidity Display ............................................................23
Temperature Unit Switching (ºF/ºC)...................................................................................24
Fan Speed.........................................................................................................................25
Swing.................................................................................................................................26
Weekly Schedule Settings Quick Access ..........................................................................27
Override Settings...............................................................................................................28
Schedule Management..............................................................................................................29
Setup Schedule Templates................................................................................................31
Paste a Schedule ..............................................................................................................32
Copy and Paste a Schedule Template ..............................................................................32
Copy a Schedule ..............................................................................................................32
Rename a Schedule Template ..........................................................................................34
Delete a Schedule Template .............................................................................................35
Add a Daily Schedule Action .............................................................................................36
Delete a Daily Schedule Action .........................................................................................37
Rename a Daily Schedule Action ......................................................................................37
Edit a Daily Schedule Action .............................................................................................38
Setup a Weekly Schedule .................................................................................................39
Tap the Add button. ...........................................................................................................40
Rename a Weekly Schedule .............................................................................................41
Delete a Weekly Schedule ................................................................................................42
Modify a Weekly Schedule ................................................................................................43
Select the Weekly Schedule to Use ..................................................................................44
Setup Holiday and Special Day Schedules .......................................................................45
Add a Holiday and Special Day Schedule.........................................................................46
Rename a Holiday and Special Day Schedules................................................................47
Modify a Holiday and Special Day Schedules...................................................................48
Delete a Holiday and Special Day Schedules ...................................................................49
Override Scheduled Settings.............................................................................................50
General Settings Conguration .................................................................................................52
Time Format Settings ........................................................................................................53
Time Settings.....................................................................................................................53
Theme Settings .................................................................................................................54

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Brightness Settings ...........................................................................................................54
Controller Touch Tone (Sound) Settings............................................................................55
Standby Interface (Screen Saver) Settings .......................................................................56
Standby (Screen Saver) Duration Settings .......................................................................57
Swing Angle Settings.................................................................................................................58
Daylight Savings Time Settings .................................................................................................58
Room Temperature and Humidity Display Settings ...................................................................61
Contractor Information Input......................................................................................................62
Service Menu.............................................................................................................................63
Access Service Menu........................................................................................................63
Change Password .............................................................................................................64
Master / Sub Wired Controller Settings .....................................................................................65
Master / Sub Wired Controller Operation ..................................................................................66
Indoor Unit Address Settings .....................................................................................................68
Indoor Unit Display Board & Buzzer (Sound) Settings ..............................................................69
Room Temperature Sensor Settings .........................................................................................70
Auto Mode Settings ...................................................................................................................72
Draft (Cold Blow) Prevention Settings.......................................................................................74
Stand-by Fan Speed Settings....................................................................................................75
Indoor Unit Static Pressure Settings..........................................................................................76
Occupancy Sensor Function Settings .......................................................................................77
Dry Mode Settings.....................................................................................................................78
Auxiliary / Alternate Heat Settings .............................................................................................79
Setpoint Limit Settings...............................................................................................................81
Locking Function Settings .........................................................................................................82
Advanced Information................................................................................................................83
Device Operation Information Query.................................................................................84
Device Operation Error History Query...............................................................................86
HHE Dry Contact Relay Interface Status Query................................................................90
Controller Information........................................................................................................91
Firmware and Setting Information .............................................................................................92
Software Version ...............................................................................................................93
Controller Software Update ...............................................................................................94
Indoor Unit Software Update .............................................................................................96
Setting Parameters Backup...............................................................................................99
Setting Parameters Import ..............................................................................................100
Reset Settings .................................................................................................................101
Help .........................................................................................................................................102
Get On-screen Help ........................................................................................................102

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• This manual provides the installation
instructions for this controller. Refer to the
included wiring diagrams to connect the
controller to the indoor unit.
• The controller uses low voltage. Keep a
minimum distance of 12” (305 mm) between
low voltage control wire and high voltage
power wires.
Power wiring between controller and rst
indoor unit:
• Minimum 18 AWG stranded, shielded cable
up to 164 feet (50 m).
• Ensure there are no gaps between the con-
troller back cover and the mounting surface.
• Fill any holes in the wall behind the control-
ler to avoid false readings from inltration.
• Ground the shielded control wiring.
• Do not use a megger to test insulation.
Communication wiring between indoor
units:
• Minimum 18 AWG stranded, shielded cable.
Installation
CAUTION
!
Do not install controller in areas where
harmful gases containing sulfur or
other damaging agents may exist or the
controller may be damaged.
Clean controller using a clean, damp
cloth. Do not spray cleanser on or around
controller.
Be sure that power supply has been
turned o󰀨 before beginning installation.
Do not operate controller with wet hands.
WARNING
!
IMPORTANT
Read all of the information in this manual
before using this controller. All wiring must
conform to local and national building and
electrical codes and ordinances. This is a
12 VDC controller. Do not install on voltages
higher than 12 VDC.
IMPORTANT
Electrostatic discharge can a󰀨ect electronic
components. Take precautions to neutralize
electrostatic charge by touching your hand
and tools to metal prior to handling the con-
trol.

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COM 12V
HB
HA
NOTE - 1. Connect up to 16 indoor units
2. Ground cable shielding at indoor unit
3. All wiring is polarity sensitive
COM 12V
HB
HA
Figure 1. Connect Controller to Single Indoor Unit Wiring Connections
Connecting to One Indoor Unit
Connect the controller to one indoor unit main control board using 4-conductor shielded 18 GA
cable. Connect to terminals 12V,COM,HA,HB. See Figure 1.

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Figure 2. Connect Controller to Multiple Indoor Units Wiring Connections
Connecting to Multiple Indoor Units
Connect the controller to multiple indoor units, up to 16. Use 4-conductor shielded cable to connect
to the rst indoor unit, then daisy chain control wiring to each indoor unit using the HA/HB terminals
in the electrical control box of the indoor unit. Do not daisy chain 12V power cable. See Figure 2.
NOTE – All of the indoor units connected to the controller must be on the same refrigerant circuit,
connected to the same outdoor unit.
NOTES - 1. Connect “+12V” on the controller to terminal “+12V” on the first indoor
unit only. 12V connection provides power to controller; connection to
multiple indoor units will damage controller and indoor unit boards.
2. Ground cable shielding at each indoor unit.
4. Use stranded, shielded, 18 GA cable.
5. Connect up to 16 indoor units.
COM 12V
HB
HA
COM 12V
HB
HA
COM 12V
HB
HA COM 12V
HB
HA
CAUTION
Connect “12V” on the controller to
terminal “12V” on the rst indoor unit
only. 12V connection provides power to
controller; connection to multiple indoor
units will damage controller and indoor
unit boards.

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Mounting the Controller
1. Remove the back cover from the controller. See Figure 3.
Figure 4. Attach Back Cover to Wall
Figure 3. Remove Back Cover from Controller
2. Attach the back cover to the wall using screws. See Figure 4.

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3. Connect the controller to one indoor unit main control board using 4-conductor shielded 18 GA
cable. Connect to terminals 12V,COM,HA,HB on the back of the controller.
Figure 6. Insert Controller into Back Cover
4. Insert the controller into the bottom snap joints of the back cover at an angle. See Figure 6.
Figure 5. Connect Cabling
HA HB 12V COM
HA
HB
COM
P12V Q

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Figure 7. Snap Controller Into Place
5. Push the controller back toward the wall until it “snaps” into place. See Figure 7.

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Home Screen Display
Figure 8. Home Screen Display 1
Figure 9. Home Screen Display 2
3
21
4
78
5
10
6
9
11
14
13
12
15
16
17
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Table 1. Home Screen Display
Number Display Item Description
1ON/OFF button Tap to turn the indoor unit on or o󰀨.
2Settings button Tap to access the menu screen.
3Time Display Displays the current system time.
4Auto Mode Settings
Select Auto mode when the indoor unit is ON, and then
the indoor unit will run in Auto mode (the icon illuminates
after selection).
5Cooling Mode Settings
Select Cooling mode when the indoor unit is ON, and
then the indoor unit will run in Cooling mode (the icon
illuminates after selection).
6Heating Mode Settings
Select Heating mode when the indoor unit is ON, and
then the indoor unit will run in Heating mode (the icon
illuminates after selection).
7Dry Mode Settings
Select Dry mode when the indoor unit is ON, and then the
indoor unit will run in Dry mode (the icon illuminates after
selection).
8Fan Mode Settings
Select Fan mode when the indoor unit is ON, and then the
indoor unit will run in Fan mode (the icon illuminates after
selection).
9Temperature Unit Set-
tings
Switch the temperature unit: display in
Fahrenheit/Celsius temperature.
10 Operation Mode Displays the mode of operation of the indoor unit.
11 Fan Speed Control
Button
Select fan speed, and tap “Auto”, “High”, “Med”, or “Low”
to conrm the selection.
12 Indoor Temperature
and Humidity Display
Display the temperature and humidity of the room in
which the indoor unit is located.
13 Setpoint Displays the setpoint.
14 Setpoint Adjustment
Slider Adjust the setpoint by pressing and sliding.
15 Vertical Swing Angle
Display
Displays the vertical swing angle of the indoor unit; tap to
access the vertical swing angle settings.
16 Horizontal Swing Posi-
tion Display
Display the horizontal swing angle of the indoor unit; tap
to enter the horizontal swing angle settings.
17 Weekly Schedule
Display
Display the setting status of the weekly schedule status,
and tap to access the weekly.
18 Override Status
Display
Display the Override status and tap here to set the
Override settings.

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Table 2. Special Status Symbol Displays
No. Icon Name Description
1Fan Displays when the indoor unit is in Fan
mode.
2Cool Displays when the indoor unit is in
Cooling mode.
3Heat Displays when the indoor unit is in
Heating mode.
4Dry Displays when the indoor unit is in Dry
mode.
5Cooling operation in Auto mode Displays when the indoor unit is in Auto
mode providing cooling operation.
6Heating operation in Auto mode Displays when the indoor unit is in Auto
mode providing heating operation.
7Centralized controller lock Displays when some functionality is
locked by a centralized controller.
8Group control Displays when more than one indoor
unit is connected to the controller.
9Occupancy sensor Displays when an occupancy sensor
is active.
10 Help Tap to see the Help screens.
11 Mode conict prompt
Displays when the indoor unit is in
mode conict with the outdoor unit
(heat pump systems)
12 Auto Dry function Displays when auto dry function is ON.
13 Master controller Displays if the controller is a master.
14 Master controller Displays if the controller is a sub.
15 Outside air ducted indoor unit Displays if the connected indoor unit is
providing outside air.
16 ON/OFF lock Displays when some functionality is
locked by settings on this controller.
17 Mode lock Displays when Mode is locked.

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No. Icon Name Description
18 Setpoint lock Displays when Setpoint is locked.
19 Schedule lock Displays when Schedule is locked.
20 Defrosting or oil return Displays when the outdoor unit is in
defrost or oil return operation.
20 Cold air prevention
Displays during period of time before
the coil warms to the determined cold
air prevention temperature. The fan
will not run during this time period.

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Operation
Figure 10. ON/OFF Operation
NOTE - Indoor units connected to a local controller may also be controlled by a centralized control-
ler. Indoor units respond to the last command sent. It is recommended that indoor units be con-
trolled from a single source of control, either local controller or centralized controller but not both,
to avoid conicts in commands.
ON/OFF
Tap the On/O󰀨 button to turn the indoor unit on or o󰀨.

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Figure 11. Error Code Display
Error Code Display
When the connected indoor units or outdoor unit has an error, the original set temperature inter-
face will display the error code.
Tap the error display area and to open the error code description interface.

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Cooling Mode Operation
When the indoor unit is powered on, tap COOLING in the operating mode selection interface.
The selected icon will illuminate when the indoor unit runs in Cooling mode. The Cooling icon is
displayed in the upper right corner of the home page.
To adjust the setpoint, tap the setpoint slider and drag the slider to the new setpoint temperature.
The default setpoint range is 62°F to 86°F (17°C to 30°C).
Figure 12. Cooling Mode Operation
Mode Settings

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Figure 13. Heating Mode Operation
Heating Mode Operation
When the indoor unit is powered on, tap HEATING in the operating mode selection interface. The
selected icon will illuminate when the indoor unit runs in Heating mode. The Heating icon is dis-
played in the upper right corner of the home page.
To adjust the setpoint, tap the setpoint slider and drag the slider to the new setpoint temperature.
The default setpoint range is 62°F to 86°F (17°C to 30°C).

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Figure 14. Auto Mode Operation
Auto Mode Operation
When the indoor unit is powered on, tap AUTO in the operating mode selection interface. The se-
lected icon will illuminate when the indoor unit runs in Auto mode. The Auto icon or the Cooling icon
is displayed in the upper right corner of the home page.
NOTE - During Auto mode, both operation mode (cooling or heating) setpoints display on the Home
screen. The current operation mode setpoint displays larger than the non-current operation
mode.
In Auto mode the Cooling setpoint range is 68°F to 86°F (20°C to 30°C), the Heating setpoint range
is 62°F to 81°F (17°C to 27°C).
To adjust the setpoint of either cooling or heating while in Auto mode, tap the appropriate setpoint,
either cooling or heating. That setpoint will display as the larger number. Drag the temperature
slider to the new setpoint temperature. If the setpoint you adjusted is not the current operation
mode, after 10 seconds, the current operation mode setpoint will display as the larger number.
NOTE - The setpoint deadband between cooling and heating setpoints is setup in the Settings
menu.

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Figure 15. Auto Mode Setpoints

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Figure 16. Dry Mode Operation
Dry Mode Operation
When the indoor unit is powered on, tap DRY in the operating mode selection interface. The se-
lected icon will illuminate when the indoor unit runs in Dry mode. The Dry icon is displayed in the
upper right corner of the home page.
Fan speed cannot be adjusted during Dry mode.