Lennox V0STAT54P-3 Installation instructions

1
Electrostatic discharge can a󰀨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.
INSTALLATION/
OPERATION
INSTRUCTIONS
CONTROLS
507898-01
01/2019
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-3 Indoor Unit
Non-programmable
Controller
IMPORTANT
!
IMPORTANT
!
©2018 Lennox Industries Inc. Dallas, Texas, USA
VRF

2
Shipping and Packing List
Package 1 of 1 contains;
1 – Wired Controller
2 – Plastic spacers
3 – Screws
1 – Installation and operation manual
General
The V0STAT54P-3 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, 18-gauge, stranded,
shielded, polarity-sensitive cable is re-
quired for installation.
• Be sure that the indoor unit power sup-
ply has been turned o󰀨 before begin-
ning 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.
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
!
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 controller back cover and the
mounting surface.
• Fill any holes in the wall behind the
controller to avoid false readings from
inltration.
• Ground the shielded control wiring at
the indoor unit.
• 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 manu-
al 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
CAUTION
!
IMPORTANT
!
1 2
3

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1. Remove the back cover by inserting a
at head screw driver into the slots until
the clips release then lifting up the bot-
tom of the controller and sliding it toward
the top of the back cover. See Figure 1.
Do not lift the bottom of the controller
straight up as that will damage the
clips. See Figure 1.
Figure 2. Do Not Damage Casing
Return air (T1) sensor.
Do not insert screw
driver.
Use these slots
to remove the
back cover.
Do not twist screw driver or use the
screw driver to pry up the cover plate.
Use caution to prevent damage to
casing.
2. Do not twist the screw driver or use the
screw driver to pry up the face plate or
the casing could be damaged. Use cau-
tion to avoid damaging the controller.
Do not insert the screw driver in the T1
Return Air sensor hole. See Figure 2.
3. Adjust the length of the two plastic spacers as needed to allow the controller to be
mounted 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 3.

5
Figure 3. Installation
Figure 4. Connection at Controller
4-conductor wiring
4. Attach the back cover using factory-provided screws or other xing method as appro-
priate for the application. See Figure 3.
5. At the controller, wire the eld-provided 4-conductor shielded cable to +12V/COM/HB/
HA terminals of the controller. See Figure 4.
6. Reattach the controller to the back cover.

6
Figure 5. Wire to One Indoor Unit
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.
7. Connect the controller to one or more indoor units, up to 16. Use 4-conductor shield-
ed cable to connect to the rst indoor unit. NOTE - Wiring is polarity sensitive. See
Figure 5.
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

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Specications
Input voltage 12 VDC
Ambient temperature 23~110°F (-5~43°C)
Ambient humidity RH40%~RH90%
Table 1. Specications
Figure 6. Wire Multiple Indoor Units
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
8. Daisy chain 2-conductor control wiring to each additional indoor unit using the
HB/HA terminals in the electrical control box of the indoor unit. Do not daisy chain
the +12V power cable or the COM wire. See Figure 6. NOTE - Wiring is polarity sen-
sitive.

8
Description of Buttons & Display
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
Sub

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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 dehumidi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 centralized
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 centralized
controller but not both, to avoid conicts in commands.

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Figure 8. Function Lock Indicator
Louver Swing Operation
Press both the up-arrow button and the down-arrow button simultaneously to change lou-
ver auto swing operation, specied position and stop as shown in Figure 7. Do not move
louvers manually; only move louvers using the louver swing function on the controller.
NOTE - Not available on all indoor unit types.
Lock Operation
Some operational functions can be locked. Use Settings No. 29~33 to lock the functions
of the controller. See Table 2.
Figure 7. Louver Swing Operation
AUTO
AUTO
Locked Function
Centralized
Controller
Locked

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Controller Settings
• Press and hold the Fan speed button and the Mode button for 3 seconds to access
the controller settings.
• Use Table 2 to setup the controller.
• When in Settings mode:
• Press the Fan speed button to accept the current setting parameters and proceed
to the next setting.
• Press the Up-arrow and Down-arrow buttons to adjust parameters.
• Press the Mode button to accept the current setting and move backwards to the
previous setting.
• Press and hold the Fan speed button and the Mode button for 3 seconds to exit the
setting.
Centralized Controller Locks Controller
If a function of the indoor unit is locked by a centralized controller (e.g. mode, temperature
setpoint, swing, etc.), the V0STAT54P controller will not be able to adjust that locked func-
tion. The function must be unlocked at the centralized controller before the local controller
can operate it.
Figure 7. Controller Settings
Settings Number
(see Table 2)
Settings
Parameter

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Table 2. Controller Settings
No. Function Value Description Note
1
Power o󰀨 –
Memory settings
for Auto Mode
NOTE – When
Auto mode is
being used,
setpoint, fan
speed, and
operation
mode (cooling
or heating) is
memorized by
the indoor unit.
on on (default)
When Auto mode is being
used, the controller will
memorize the user setting of
Auto mode before powering
o. When power is restored,
the controller mode will be
set to Auto mode.
-- o󰀨
When Auto mode is being
used, the controller will not
memorize the user setting of
Auto mode before powering
o. When power is restored,
the controller mode will be
set to the operation mode
of indoor unit (cooling or
heating).
2Temperature
unit
C °C
The controller and connect-
ed indoor units will display
°C.
F °F (default)
The controller and con-
nected indoor units will
display °F.
3Master/Sub
controller
0 Master (default) Set the controller as Master
or Sub controller.
1 Sub

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No. Function Value Description Note
4
Maximum
heating
setpoint limit
62-86°F
(17-30°C)
86°F (30°C)
(default)
Lock the maximum heating
setpoint on the controller.
The Lock icon will display
on the controller when this
setting is set to anything
other than the default.
5
Minimum
cooling
setpoint limit
62-86°F
(17-30°C)
62°F (17°C)
(default)
Lock the maximum cooling
setpoint on the controller.
The Lock icon will display
on the controller when this
setting is set to anything
other than the default.
6Indoor unit
addressing 0~63
Set the indoor unit address
connected to the controller.
One-to-one connection of
controller to indoor unit only.
7Indoor display
board - display
0 OFF Enable/Disable the digital
display of the indoor unit.
1 Normal (Default)
8Indoor display
board - buzzer
0 OFF Enable/Disable the buzzer
in the digital display of the
indoor unit.
1 Normal (Default)

14
No. Function Value Description Note
9
Room tempera-
ture sensor
location
nt From individual
indoor unit
Return air sensing takes
place at the indoor unit.
ct From controller
(default)
Return air sensing takes
place at the controller.
00~62 From # indoor
unit
Return air sensing takes
place at the specied indoor
unit.
10 Room tempera-
ture calibration
-5°F/°C -5°F/°C
Calibrate the room tempera-
ture by the set value.
-4°F/°C -4°F/°C
-3°F/°C -3°F/°C
-2°F/°C -2°F/°C
-1°F/°C -1°F/°C
0°F/°C 0°F/°C (Default)
1°F/°C 1°F/°C
2°F/°C 2°F/°C
3°F/°C 3°F/°C
4°F/°C 4°F/°C
5°F/°C 5°F/°C

15
No. Function Value Description Note
11
Setpoint
Control
Resolution
01°F/.5°C
(Default)
Set the setpoint resolution.
Cooling/heating will begin
when the room temperature
is the set value above or
below the setpoint.
1 2°F/1°C
12
Auto mode
change over
time
15 15 minutes
(default)
Set the minimum time gap
between heating and cooling
changeover.
30 30 minutes
60 60 minutes
90 90 minutes
13 Auto mode dead
band limit
3 (°F/°C) 3 (°F/°C)
(Default)
Set the cooling and heating
setpoint gap of auto mode.
4 (°F/°C) 4 (°F/°C)
5 (°F/°C) 5 (°F/°C)
6 (°F/°C) 6 (°F/°C)
7 (°F/°C) 7 (°F/°C)
14
Auto mode
dead band limit
- type
0Minimum dead
band (default) Set the cooling and heating
setpoint gap is a minimum
limit value of a xed value.
1 Fixed dead band

16
No. Function Value Description Note
15 External Static
Pressure 0~25 Set value * 25 in. wg (10Pa)
Set the indoor unit external
static pressure, only applies
to ducted indoor units. One
controller to one indoor unit
connections only.
16 Draft prevention
59°F(15°C) 59°F (15°C)
default
When the indoor unit is in
heating, when the coil tem-
perature is lower than the
set value, the indoor unit fan
will force to run low speed or
stop for preventing providing
cold air.
68°F(20°C) 68°F (20°C)
75°F(24°C) 75°F (24°C)
79°F(26°C) 79°F (26°C)
17
Indoor unit fan
setting when
cooling satised
- - OFF (default)
Set the indoor unit fan status
when cooling is satised.
1 Low speed
2 Medium speed
3High speed
FMaintain last
speed

17
No. Function Value Description Note
18
Indoor unit fan
setting when
heating satised
- - OFF (default)
Set the indoor unit fan status
when heating is satised.
1 Low speed
2 Medium speed
3High speed
FMaintain last
speed
19 Reserved
20 Reserved
21 Reserved
22
Auxiliary/Alter-
native heater
installation
0No aux/alt heat
installed (default)
Set the installation scenario
of the auxiliary/alternative
heater.
1
Aux/alt heat
installed at Indoor
unit or in duct
2Other aux/alt heat
installation

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No. Function Value Description Note
23 Auxiliary heat
on
2°F/°C 2°F/°C
The AUX/ALT contact will
close when the room tem-
perature is set value lower
than the setpoint.
3°F/°C 3°F/°C (default)
4°F/°C 4°F/°C
5°F/°C 5°F/°C
6°F/°C 6°F/°C
7°F/°C 7°F/°C
24
Auxiliary heat
o󰀨
-4°F/°C -4°F/°C
The AUX/ALT contact will
open when the room tem-
perature is set value higher
than the setpoint.
-3°F/°C -3°F/°C
-2°F/°C -2°F/°C
-1°F/°C -1°F/°C
0°F/°C 0°F/°C
1°F/°C 1°F/°C (Default)
2°F/°C 2°F/°C
3°F/°C 3°F/°C
4°F/°C 4°F/°C
25 Dehumidier
contact enabled
0 Disabled (default) Enable/Disable the dehumid-
ier contact.
1 Enabled

19
No. Function Value Description Note
26
Dehumidier
contact control
cut o󰀨 enabled
0 Disabled (default) Enable/Disable the dehumid-
ier contact control cut o󰀨.
1 Enabled
27
Dehumidier
contact control
cut o󰀨 value
setting
3°F/°C 3°F/°C Set the lowest limit for the
dehumidier contact control.
When the room temperature
reaches the setpoint less
this set value, the dehumidi-
er contact will open.
4°F/°C 4°F/°C (default)
5°F/°C 5°F/°C
6°F/°C 6°F/°C
28
Unoccupied
heating set
back
54°F
(12°C) 54°F (12°C)
The set back setpoint of
the heating setpoint of
unoccupied.
62°F
(17°C)
62°F (17°C)
(default)
70°F
(21°C) 70°F (21°C)
29 Lock all buttons
0Unlocked
(default) Lock/Unlock all controller
buttons. Does not unlock
functions locked individually.
1 Locked

20
No. Function Value Description Note
30 Lock Mode
button
0Unlocked
(default)
Lock/Unlock the Mode
button. When locked, the
Mode button on this control-
ler becomes disabled. The
indoor unit mode cannot be
changed from this controller.
1 Locked
31 Lock ON/OFF
button
0Unlocked
(default)
Lock/Unlock the ON/OFF
button. When locked, the
ON/OFF button on this
controller becomes disabled.
The indoor unit cannot be
turned on or o󰀨 from this
controller.
1 Locked
32 Lock up/down
buttons
0Unlocked
(default)
Lock/Unlock up/down
buttons. When locked, the
up and down buttons on the
controller become disabled.
1 Locked
33 Lock swing
0Unlocked
(default) Lock/Unlock controller
function.
1 Locked
34 Reset Controller
0Unlocked
(default) Reset controller to factory
default settings. Does not
change indoor unit settings.
1 Locked