Lennox V0STAT54P-2 Installation instructions

1
Electrostatic discharge can aff ect
electronic components. Take precau-
tions to neutralize electrostatic charge
by touching your hand and tools to
metal prior to handling the control.
Frequent changes to operating mode
may cause system malfunction.
Allow at least one minute between
mode changes to allow the system to
stabilize.
©2018 Lennox Industries Inc.
Dallas, Texas, USA
INSTALLATION/
OPERATION
INSTRUCTIONS
CONTROLS
507596-06
05/2018
THIS MANUAL MUST BE LEFT WITH
THE OWNER FOR FUTURE REFER-
ENCE
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.
!
V0STAT54P-2 Indoor Unit
Non-programmable
Controller
©
2
0
1
8
Lennox Industries Inc.
IMPORTANT
!
IMPORTANT
!

2
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-pro-
grammable local controller that controls
up to 16 VRF indoor units. These instruc-
tions are intended as a general guide and
do not supersede local codes in any way.
Consult authorities having jurisdiction be-
fore installation.
Requirements
• Four-conductor cable is required for
installation.
• Be sure that power supply has been
turned off before beginning installation.
• This controller should be used only as
described 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.
Power wiring between controller and
fi rst indoor unit:
• Minimum 18 AWG stranded shielded
cable up to 164 feet (50 m).
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
!
• 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
infi 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.
CAUTION
!

3
Read all of the information in this man-
ual before using this controller. All wiring
must conform to local and national build-
ing and electrical codes and ordinances.
This is a 12 VDC controller. Do not in-
stall on voltages higher than 12 VDC.
Do not operate controller with wet
hands.
• This manual provides the installation
instructions for this controller. Refer to
the included wiring diagrams to con-
nect 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.
Figure 1. Remove Controller from Back Cover
1. Remove the controller from the back
cover using a fl at head screw driver as
shown. See Figure 1.
Return air (T1) sensor.
Do not insert screw
driver.
Use these slots
to remove the
back cover.
CAUTION
!
IMPORTANT
!

4
Figure 2. Installation
2. Attach the back cover using fi eld-provided screws.
3. At the controller, wire the fi eld-provided 4-conductor shielded cable to X / Y / GND (E)
/ 12V terminal of the controller. See Figure 3.
1. Adjust the length of the two plastic spacers as needed to allow the controller to be
mounted fl ush 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.
Figure 3. Connection at Controller
4-conductor wiring

5
Figure 4. Wire to One Indoor Unit
4. Reattach the controller to the back cover.
5. Connect the controller to one or more indoor units, up to 16. Use 4-conductor shield-
ed cable to connect to the fi rst indoor unit. NOTE - Wiring is polarity sensitive. See
Figure 4.
GND
(E) 12V
X
Y12V X YE
NOTE - 1. Connect up to 16 indoor units
2. Ground cable shielding at indoor unit
3. Connect terminal “GND/(E)” on the controller to terminal “E” on the indoor unit
CAUTION
Connect “12V” on the controller to
terminal “12V” on the fi 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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Specifi cations
Input voltage 12 VDC
Ambient temperature 23~110°F (-5~43°C)
Ambient humidity RH40%~RH90%
Table 1. Specifi cations
Figure 5. Wire Multiple Indoor Units
12V XYE12V XYE12V XYE
GND
(E) 12V
X
Y
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 “GND (E)” 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.
1. Daisy chain 3-conductor control wiring to each additional indoor unit using the X Y E
terminals in the electrical control box of the indoor unit. Do not daisy chain 12V power
cable. See Figure 5. NOTE - Wiring is polarity sensitive.

7
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 seconds for initialization The indoor unit cannot
be controlled by the controller until initialization 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 dehumidifi cation mode. NOTE - fan speed cannot be ad-
justed 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 controller may also be controlled by a central-
ized controller. Indoor units respond to the last command sent. It is recommended that
indoor units be controlled from a single source of control, either local controller or central-
ized controller but not both, to avoid conflicts in commands.

9
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

10
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 inactive.
User cannot change fan speed
using this controller.
Lock
temperature
increase
The Up-arrow button is inactive.
User cannot raise setpoint using
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