Lennox V0STAT51P-2 User manual

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©2018 Lennox Industries Inc.
Dallas, Texas, USA
INSTALLATION/
OPERATION
INSTRUCTIONS
CONTROLS
507595-05
05/2018
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-2 Touch Screen
Programmable Local Controller
General
The V0STAT51P-2 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.

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Contents
General........................................................................................................................................1
Requirements ..............................................................................................................................1
Shipping and Packing List ..........................................................................................................1
Tools Needed...............................................................................................................................1
Controller Placement ..................................................................................................................1
Installation ...................................................................................................................................3
Connecting to One Indoor Unit............................................................................................4
Connecting to Multiple Indoor Units ....................................................................................5
Mounting the Controller .......................................................................................................6
Home Screen Display..................................................................................................................8
Operation...................................................................................................................................10
Schedule Management..............................................................................................................20
Create or Modify a Schedule.............................................................................................20
Copy and Paste a Schedule..............................................................................................25
Setup Holidays Schedule ..................................................................................................27
Reset Weekly Timer Parameters.......................................................................................30
Override Function Settings................................................................................................31
Error Code Display ....................................................................................................................33
Centralized Controller Lock Function ........................................................................................34
General Settings Conguration .................................................................................................36
Set Date ............................................................................................................................37
Set Time ............................................................................................................................38
Enable or Disable the Schedule Function .........................................................................39
Set Daylight Savings Time ................................................................................................40
Set Home Screen Display Type ........................................................................................41
View and Edit Contractor and Controller Information ........................................................42
View Error Code History....................................................................................................43
Complete List of Error Code Descriptions .........................................................................44
Service.......................................................................................................................................45
Set System Type ...............................................................................................................46
Set Temperature Unit.........................................................................................................47
Set Temperature Setpoint Range ......................................................................................48
Set Fan Control .................................................................................................................49
Adjust Auxiliary / Alternative Heat Settings........................................................................50
Auxiliary Heat Settings ......................................................................................................51
Alternative Heat Control ....................................................................................................52
Lock Function ....................................................................................................................53
Change User Password for Service Conguration Access ...............................................54
Set Room Temperature Sensor Location ..........................................................................55
Set Room Temperature Sensor Calibration.......................................................................56
Set Override Function .......................................................................................................57
Set Louver Swing Function ...............................................................................................58
Congure ERV Settings (Future Revision)........................................................................59
Advanced Information................................................................................................................60
Indoor Unit Operating Data ...............................................................................................61
Indoor Unit Error Code History ..........................................................................................63
HHE Relay Four Dry-Contact Status.................................................................................64
Firmware and Setting Information .............................................................................................65
Copy/Change Settings or Update Firmware .....................................................................66
Export Settings to USB .....................................................................................................67
Import Settings from USB .................................................................................................68
Update Software................................................................................................................69
Software Update Best Practices........................................................................................70
Reset Settings ...........................................................................................................................71

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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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C/
GND
R/
12V
X
Y12V X YE
NOTE - 1. Connect terminal “C/GND” on the controller to terminal “E” on the indoor unit.
2. Ground cable shielding at the indoor unit.
3. Use stranded, shielded, 18 GA cable.
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 X Y C/GND and R/12V. 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 XYE 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 “R/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. Connect terminal “C/GND” on the controller to terminal “E” on the indoor unit.
3. Ground cable shielding at one end of each length of cable, except at controller.
4. Use stranded, shielded, 18 GA cable.
5. Connect up to 16 indoor units.
C/
GND
R/
12V
X
Y
12V X YE12V X YE12V X YE
CAUTION
Connect “R/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. Insert the controller into the bottom snap joints of the back cover at an angle. See Figure 5.
Figure 5. Insert Controller into Back Cover
4. Push the controller back toward the wall until it “snaps” into place. See Figure 6.
Figure 6. Snap Controller Into Place

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Home Screen Display
Figure 7. Standard Home Screen Display
Figure 8. Simple Home Screen Display
1
15
14
13
10
2
3
4
5
6
7
8
9
10
2
3
4
5
6
7
8
9
12
11
1
12
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Table 1. Home Screen Display
Number Display Item Description
1ON/OFF button Swipe to turn the indoor unit on or o󰀨.
2Menu button Tap to access the menu screen.
3Mode buttons Tap to switch the indoor unit operation mode.
4Temperature Displays the current setpoint setting.
5Decrease button Tap to lower the temperature setpoint.
6Temperature slider Drag to change the temperature setpoint.
7Increase button Tap to raise the temperature setpoint.
8Fan speed Tap High, Med, or Low to change the fan
speed
9Room temperature Displays the room temperature.
10 Date/Time Displays the current date and time
11 Centralized controller
lock icon (not shown)
Indicates that the controller is locked by a
central controller.
12 Lock icon (not shown) Indicates that the selected function of the
controller is locked.
13 Swing button
Tap to enable or disable the indoor unit au-
tomatic louver swing function. Not available
on all indoor unit styles.
14 Schedule Displays the schedule status. Tap to access
weekly schedule settings.
15 Override Displays the override status. Tap to access
override settings.

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Operation
ON/OFF. Swipe the On/O󰀨 slider to turn the indoor unit on or o󰀨.
Figure 9. 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.

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Cooling Mode Operation. Tap the Cool button to start cooling operation. The indoor unit will pro-
vide cooling operation to maintain the selected setpoint. The default setpoint range is 62°F to 86°F
(17°C to 30°C).
Figure 10. Cooling Mode Operation

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Figure 11. Heating Mode Operation
Heating Mode Operation. Tap the Heat button to start heating operation. The indoor unit will pro-
vide heating operation to maintain the selected setpoint. The default setpoint range is 62°F to 86°F
(17°C to 30°C).

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Figure 12. Auto Mode Operation
Auto Mode Operation. Only available on heat recovery systems. Tap the Auto button to start auto
mode operation. The indoor unit will provide cooling or heating operation as determined by the
room temperature and the setpoint settings. The setpoint range is 62°F to 86°F (17°C to 30°C). The
cooling setpoint must be ≥3° higher than the heating setpoint.
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.
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 - A three degree setpoint deadband between cooling and heating setpoints is built in to the
controller.

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Figure 13. Dry Mode Operation
Dry Mode Operation. Tap the Dry button to start dry mode operation. Fan speed cannot be ad-
justed during dry mode.

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Figure 14. Fan-Only Mode Operation
Fan-Only Operation. Tap the Fan button to start fan-only operation. The indoor unit fan operates
without heating or cooling.

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Fan Speed. Tap High, Med, or Low to change the fan speed.
Figure 15. Fan Speed Operation

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Figure 16. Temperature Setpoint
Temperature Setpoint. Adjust the setpoint of the current mode by dragging the temperature slider
or by tapping the Increase (+) or Decrease (-) buttons. The default setpoint range is 62°F to 86°F
(17°C to 30°C). The setpoint range can be adjusted using the Setpoint Limit screen in the Service
menu.

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Figure 17. Room Temperature
Room Temperature. The room temperature displays on the controller’s main screen. The room
temperature is sensed by the sensor inside the controller (default) or by the indoor unit. Set the
sensor location using the Room Temperature Sensor Location screen in the Service menu.

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Figure 18. Swing
Swing. Tap the Swing button to enable or disable the indoor unit automatic louver swing function.
The swing icon changes to indicate if swing is on or o󰀨. Set the louver swing functionality using the
Louver screen in the Service menu. (Not available for all indoor unit types.)

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Schedule Management
Create or Modify a Schedule
1. Tap the Schedule button to access the schedule program.
Figure 19. Tap Schedule Button to access Schedule Program
NOTE – If schedules are used and a centralized controller is installed on the system, controller
functions should not be locked from the centralized controller.