Lennox V0STAT54P-2 User manual

1
©2017 Lennox Industries Inc.
Dallas, Texas, USA
INSTALLATION/
OPERATION
INSTRUCTIONS
CONTROLS
507596-04
04/2017
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.
Frequent changes to operating mode
may cause system malfunction.
Allow at least one minute between
mode changes to allow the system to
stabilize.
IMPORTANT!
!
V0STAT54P-2 Indoor Unit
Non-programmable Controller
©2017 Lennox Industries Inc.
Electrostatic discharge can affect elec-
tronic components. Take precautions
to neutralize electrostatic charge by
touching your hand and tools to metal
prior to handling the control.
IMPORTANT!

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Shipping and Packing List
Package 1 of 1 contains;
1 – Wired Controller
1 – Installation and operation manual
2 – Plastic spacers
General
The V0STAT54P-2 is a wired non-program-
mable local controller that controls up to 16
VRF indoor units. These instructions are
intended as a general guide and do not su-
persede local codes in any way. Consult au-
thorities having jurisdiction before installation.
Requirements
• Four-conductor cable is required for in-
stallation.
• Be sure that power supply has been
turned off before beginning installation.
• This controller should be used only as de-
scribed in this manual.
• Do not install the controller on outside
walls (where there is unconditioned space
on opposite side of wall) or in locations
where direct sunlight may be present.
Installation
Clean controller using a clean, damp
cloth. Do not spray cleanser on or
around controller.
Do not install controller in areas
where harmful gases containing
sulfur or other damaging agents
may exist or the controller may be
damaged.
CAUTION
!CAUTION
!
Power wiring between controller and first
indoor unit:
• Minimum 18 AWG stranded shielded
cable up to 164 feet (50 m).
• Ensure there are no gaps between the
controller back cover and the mounting
surface.
• Fill any holes in the wall behind the
controller to avoid false readings from
infiltration.
• Ground the shielded control wiring.
• Do not use a megger to test insulation.
Communication wiring between indoor
units:
• Minimum 18 AWG stranded shielded
cable.

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Do not operate controller with wet
hands.
CAUTION
!
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.
• 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) be-
tween low voltage control wire and high
voltage power wires.
IMPORTANT!
Figure 1. Remove Controller from Back Cover
1. Remove the controller from the back cover using a flat head screw driver as shown. See
figure 1.

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Figure 2. Installation
4. At the controller, wire the field-provided 4-conductor shielded cable to X / Y / GND / 12V
terminal of the controller. See figure 3.
2. Adjust the length of the two plastic spacers as needed to allow the controller to be mounted
flush with the wall. NOTE – Be sure to provide for future maintenance by allowing enough
slack in the wiring to allow the controller to be removed from the wall if needed. See figure 2.
3. Attach the back cover using field-provided screws.
Figure 3. Connection at Controller
4-conductor wiring
X 12VY GND

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Figure 4. Wire to One Indoor Unit
5. Reattach the controller to the back cover.
6. Connect the controller to one or more indoor units, up to 16. Use 4-conductor shielded cable
to connect to the first indoor unit. NOTE - Wiring is polarity sensitive. See figure 4.
COM 12VX Y 12V X Y E
NOTE - Connect up to 16 indoor units
NOTE - Ground cable shielding at indoor unit

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Specifications
Input voltage 12 VDC
Ambient temperature 23~110°F (-5~43°C)
Ambient humidity RH40%~RH90%
Table 1. Specifications
Figure 5. Wire Multiple Indoor Units
COM 12VX Y
12V X Y E 12V X Y E 12V X Y E
NOTE - Connect up to 16 indoor units
NOTE - Ground cable shielding at one end of each length of cable
7. Daisy chain 3-conductor control wiring to each additional indoor unit using the X Y E termi-
nals in the electrical control box of the indoor unit. Do not daisy chain 12V power cable. See
figure 5. NOTE - Wiring is polarity sensitive.

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Description of Buttons
Power
Button
Fan
Speed
Button
Up-Arrow
Button
Mode
Button
Cooling
Mode Heating Mode Auto Mode Dry Mode Fan Mode
Locked
Function
Centralized
Controller
Locked
Cooling
Setpoint
Heating
Setpoint
Down-Arrow
Button
Room
Temperature
Swing
Fan Speed

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Operation
After powering on the controller, wait 30 sec-
onds for initialization The indoor unit cannot
be controlled by the controller until initializa-
tion is complete.
Start/Stop Operation
Press the power button.
• Controller ON: LED display lit.
• Controller OFF: LED display not lit.
Set Operation Mode
Press the Mode button to scroll through the
mode selections.
• Cool – System operates in cooling mode.
• Heat – System operates in heating mode.
• Auto -- System operates in auto mode.
• Dry -- System operates in dehumidifica-
tion mode. NOTE - fan speed cannot be
adjusted during dry mode.
• Fan – Fan only, no heating or cooling.
To set (or change) the room temperature
setting (setpoint)
Press the up-arrow & down-arrow buttons to
adjust the setpoint.
When in Auto mode, separate heating and
cooling setpoints can be set. Press the Mode
button to switch between heating and cooling
setpoints.
NOTE - Indoor units connected to a local con-
troller may also be controlled by a centralized
controller. Indoor units respond to the last
command sent. It is recommended that in-
door units be controlled from a single source
of control, either local controller or central-
ized controller but not both, to avoid conflicts
in commands.

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MODEFAN SPEED
FAN SPEED
COOL
HEAT
ROOM TEMP.
Figure 6. Function Lock Indicator
Function Lock
Indicator
Louver Swing Operation
Press both the up-arrow button and the down-
arrow button simultaneously to start louver
auto swing operation. The louvers will move
automatically until stopped.
Press both the up-arrow button and the
down-arrow button simultaneously again
to stop the swing operation. The louvers
will remain in position where stopped. Do
not move louvers manually; only move
louvers using the auto swing function.
NOTE - Not available on all indoor unit types.
Lock Operation
Some operational functions can be locked.
See table 2

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Lock Type Operation
Simultaneously press the buttons
shown below
User Experience
Lock operation
mode
The Mode button is inactive.
User cannot change operation
mode using this controller.
Lock fan speed The fan speed button is inac- tive. User cannot change fan
speed using this controller.
Lock temperature
increase
The Up-arrow button is inactive.
User cannot raise setpoint us-
ing this controller.
Lock temperature
decrease
The Down-arrow button is inac-
tive. User cannot lower setpoint
using this controller.
Lock ON/OFF
status
The Power button is inactive
User cannot turn the indoor unit
on or off using this controller.
Lock all buttons
All buttons are inactive. User
cannot make any changes
to the indoor unit using this
controller.
Unlock all buttons All buttons are active. User can make any changes to the
indoor unit using this controller.
Table 2. Lock Operation Functions