Johnson Controls Hx 3 S1-THXU430W User manual

Johnson Controls Ducted Systems 5407934-UIM-C-1119
Hx™3 TOUCH SCREEN THERMOSTAT
MODELS: S1-THXU430W
INSTALLATION MANUAL
11/07/18 11:14AM
º
72 Auto
COOL TO 85
62
Settings
11/07/18 11:14AM
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LIST OF SECTIONS
GENERAL . . . . . . . . . . . . . . . . 2
SAFETY CONSIDERATIONS . 2
INSPECTION . . . . . . . . . . . . . . . . 3
LIMITATIONS . . . . . . . . . . . . . . . 3
CONVENTIONAL
COMPATIBILITY CHECK . . . . . . 3
COMMUNICATING
SYSTEM INSTALLATION . . . . 4
LOCATION . . . . . . . . . . . . . . . . . 5
MOUNTING
THE THERMOSTAT . . . . . . . . . . 5
INSTALLING A
NEW THERMOSTAT . . . . . . . . . 6
WIRING COMMUNICATION . . 8
WIRING REQUIREMENTS . . . . . 8
SYSTEM WIRING OVERVIEW . . 8
HUMIDIFIER CONNECTION . . 25
HUMIDIFICATION AND
DEHUMIDIFICATION . . . . . . . 28
INITIAL POWER-UP . . . . . . . .30
POWER-UP . . . . . . . . . . . . . . . 31
SYSTEM CONFIGURATION . . 31
SOFTWARE UPDATES . . . . . . 36
SERVICE MODE . . . . . . . . . . .37
ACCESSING SYSTEM
SETTINGS . . . . . . . . . . . . . . . . 37
SYSTEM SETTINGS . . . . . . . . 38
FAULTS AND
SYSTEM EVENTS . . . . . . . . . . 47
AIRFLOW CONFIGURATION . . 64
FORCED OPERATION . . . . . . . 65
VENTILATION SETTINGS . . . . 67
RESTORE DEFAULTS . . . . . . . 68
SERVICE SETTINGS . . . . . . .70
LOG . . . . . . . . . . . . . . . . . . . . . . 70
DEALER INFORMATION . . . . . 71
STATUS . . . . . . . . . . . . . . . . . . 73
WIRING DIAGRAMS . . . . . . . .74

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2 Johnson Controls Ducted Systems
SECTION I: GENERAL
The Hx™3 Touch Screen Thermostat is designed to control conven-
tional and communicating HVAC systems. Use applicable Johnson Con-
trols Ducted Systems communicating equipment as follows:
• Variable speed modulating furnace
• Two-stage variable speed ECM furnace
• Variable speed air handler
• Premium 19 and 21 SEER air conditioners
• Premium 19 and 20 SEER heat pumps
• Variable capacity systems
While the communicating system has been designed for easy installa-
tion, this document provides a more detailed explanation of the installa-
tion process for installers. For communicating zoning applications,
please refer to the literature kit that is included with the Zone Module
(S1-ZMC401A).
To use the complete feature set available, you must connect the Hx™3
Touch Screen Thermostat to Wi-Fi.
For ease of installation and to ensure the thermostat has the latest soft-
ware updates, make sure that Wi-Fi access is available (through the
homeowner’s Wi-Fi network or a mobile hotspot).
SECTION II: SAFETY CONSIDERATIONS
This is a safety alert symbol. When you see this symbol on labels
or in manuals, be alert to the potential for personal injury and equipment
damage.
Understand and pay particular attention to the signal words DANGER,
WARNING, and CAUTION.
DANGER indicates an imminently hazardous situation, which, if not
avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation, which, if not
avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation, which, if not
avoided may result in minor or moderate injury. It is also used to alert
against unsafe practices and hazards involving only property damage.

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Johnson Controls Ducted Systems 3
INSPECTION
The following table details the parts included in this kit. Examine the kit
to ensure all parts are present.
LIMITATIONS
The primary function of the thermostat is to command a system contain-
ing communicating products.
The following are exceptions:
• Installing a communicating variable speed modulating furnace with
a non-communicating air conditioner. In this case, the variable-
speed modulating furnace relays 24 VAC outputs to the non-com-
municating air conditioner (per communicated commands by the
thermostat).
• Installing communicating controls in non-communicating Ducted
Systems products
• Installing a communicating interface control (which converts com-
municating commands into 24 VAC outputs)
CONVENTIONAL COMPATIBILITY CHECK
The Hx™3 Touch Screen Thermostat works with 24 VAC systems and
requires both R and C 24 VAC connections. This includes gas furnaces,
air handlers, electric, oil, forced air, variable speed, heat pump, and
hydronic heat.
TABLE 1:
Content List
Item QTY Description
1 1 Thermostat Display
2 1 Thermostat Base
4 2 Screws
5 2 Drywall Anchors
6 1 User’s Information Manual
7 1 Installation Manual

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4 Johnson Controls Ducted Systems
You can configure the thermostat for the following:
• Conventional up to 2H/2C and heat pump up to 4H/2C
• Heating: 1 and 2 stages (W1, W2)
• Cooling: 1 and 2 stages (Y1, Y2)
• Heat pump: With auxiliary and emergency heat or fossil fuel
• HUM, O/B, Y2, Y1, W1, W2
• Fan single speed (G)
• Power (R, C) dual fuel compatible (heat pump with gas furnace)
• Humidity control (humidify and dehumidify)
• Outdoor air temperature or remote room sensor (optional)
SECTION III: COMMUNICATING SYSTEM
INSTALLATION
The intention of this document is to ensure proper connection and setup
of the various communicating system components. Use these instruc-
tions in conjunction with instructions provided with indoor, outdoor, and
accessory equipment with which the thermostat is used.
This manual contains information about setup, operation, and trouble-
shooting. Short videos illustrating the installation, setup, and configura-
tion of the Hx™3 Touch Screen Thermostat are available at
www.simplygettingthejobdone.com in the Academy TV application.
Installers must be trained, experienced service technicians. When
installing this product, do the following:
• Read all instructions carefully before beginning the installation.
• Make sure the product is suitable for your application by checking
all ratings on the product and in the instructions provided.
NOTICE
Dual fuel systems require the use of the ambient sensor (S1-
02542683000), if the room thermostat is used to control fossil fuel
operation.
WARNING
Failure to follow these instructions can create hazardous situations or
damage the product.
!

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Johnson Controls Ducted Systems 5
LOCATION
Install the thermostat at or around 5 ft (1.5 m) above the floor in an area
with good circulation of room temperature. See Figure 1.
Do not install the thermostat where it can be affected by the following:
• Drafts or stagnant air behind doors and in corners
• Hot or cold air from ducts
• Radiant heat from sun or appliances
• Concealed pipes and chimneys
• Unconditioned areas, such as an outside wall
MOUNTING THE THERMOSTAT
For most installations, you (the installer) can mount the thermostat by
following the basic installation steps outlined below. However, there may
be some cases where you are not able to penetrate the wall where you
are mounting the thermostat, or where the thermostat being replaced
has left a larger hole than needed for installation. For these and other
cases (including installation with a vertical junction box), you can obtain
an accessory wall plate.
FIGURE 1: Control Location
12
12
12
<(6
)((7
0(7(56
$

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6 Johnson Controls Ducted Systems
Follow these steps:
1. Turn off all power to the indoor and outdoor equipment.
2. If an existing thermostat is being replaced:
a. Disconnect the wires from the existing thermostat.
b. Remove the existing thermostat from the wall.
c. Properly discard or recycle the old thermostat.
3. Mark where the thermostat is to be mounted on the wall (standard
height is 5 ft from the floor).
INSTALLING A NEW THERMOSTAT
1. Position the thermostat base against the wall and determine if it com-
pletely covers the footprint of the current thermostat.
2. Position the thermostat base against the wall (or wall plate if used)
and determine if the new screw locations align with prior locations.
3. If the thermostat base does not align with the existing anchor holes,
mark the new screw locations with a pencil.
• Drywall: Drill a 3/16 in. hole for the anchor and install.
• Plaster: Drill a 7/32 in. hole for the anchor and install.
4. If the remote sensor is to be used, pull the wires through and connect
them to the S1 and S2 terminals. Use the ambient sensor (S1-
02542683000), which you can purchase separately.
WARNING
Voltage Hazard: Live wires can cause electrical shock or equipment
damage. Disconnect power before beginning installation.
NOTICE
Mercury is a hazardous substance. If the existing thermostat contains
any mercury, it MUST be disposed of properly. This thermostat does
not contain mercury.
NOTICE
If a thermostat was formerly in place, evaluate the location to make
sure it meets the location requirements outlined earlier in this docu-
ment.
!

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Johnson Controls Ducted Systems 7
5. Pull the wires through the opening in the thermostat base and secure
the thermostat base (and wall plate) to the wall using the screws pro-
vided.
6. Though not required for operation, it is best practice that the thermo-
stat is level.
7. One by one, connect each wire by pushing down on the quick con-
nect tab, inserting the wire into the connector opening, and releasing
the tab to complete.
8. Ensure the thermostat base is positioned with the UP arrow pointing
upwards. See Figure 2.
9. Align the four positioning tabs with the four slots on the back side of
the screen and gently press the screen into place.
10.Fasten the screen to the thermostat base with the two retaining
screws provided.
The thermostat may be wired conventionally. For wiring diagrams,
see Section IX: Wiring Diagrams.
FIGURE 2: Thermostat Installation and Components
UP ARROW
RETAINING SCREWS x2
BASE
SCREEN
POSITIONING
TABS
(Note orientation)
QUICK
CONNECT
TABS
A0972-001

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8 Johnson Controls Ducted Systems
SECTION IV: WIRING COMMUNICATION
All wiring must comply with local electrical codes and ordinances. See
Table 2 for terminal designations.
WIRING REQUIREMENTS
Use standard 18 AWG thermostat wires to connect the communicating
HVAC system and the conventional HVAC system.
Special (shielded) cable is not typically required.As with all communicat-
ing devices, it is a good idea to keep wiring at least 1 ft away from large
inductive loads, for example, electronic air cleaners and motors. If these
wiring practices are ignored, it may introduce electrical interference
(noise), which can cause erratic system operation.
SYSTEM WIRING OVERVIEW
WARNING
If using the thermostat with variable capacity outdoor equipment, DO
NOT connect to the R terminal of the outdoor unit control board.
TABLE 2:
Terminal Designations
Signal Definition Label
Data Non-inverted signal A (+)
Low-voltage power hot 24 VAC (Hot) R
Low-voltage power common and data ground 24 VAC (Common) C
Data Inverted signal B (-)
NOTICE
There may be installation applications where large inductive loads
cannot be avoided. In these cases, use shielded wire in proximity to
the inductive loads to ensure proper system functionality.
IMPORTANT: The communicating system requires four wires to oper-
ate. If installing a communicating system, ensure to supply at least
four wires to each unit/control. For a simple diagram of the ideal wiring
path, see Figure 3.
!

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Johnson Controls Ducted Systems 9
The system is connected by four wires. Two of the wires are used to
bring power to the individual controls (R and C), and two of the wires are
used for serial communication (A+ and B-).
Variable capacity outdoor units only require three wires. Variable capac-
ity equipment has its own transformer, so it does not require an R con-
nection between the indoor and outdoor equipment.
FIGURE 3: High-Level Wiring Path
FIGURE 4: Wiring Diagram - Fully Communicating System Components
Z
KDDKDD
$*5((1:,5(
55(':,5(
&%/$&.:,5(
%%/8(:+,7(:,5(
$5&%
$5&% $5&%
287'22581,7 ,1'22581,7
$
'2127
FRQQHFWWR
YDULDEOHFDSDFLW\
RXWGRRUHTXLSPHQW
Touch Screen
Communicating
Control
VS Air Handler/Furnace
Communicating
Control
Air Conditioner/Heat Pump
Communicating
Control
A+
R
GND
B-
A+
R
C
B-
A+
R
C
B-
A0611-002
DO NOT connect to variable capacity outdoor equipment.

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10 Johnson Controls Ducted Systems
FIGURE 5: Wiring Diagram - Variable Capacity System
FIGURE 6: Wiring Diagram - Modulating Communicating Furnace,
Non-Communicating AC
Air Handler / Furnace
Communicating Control
Variable Capacity
AC / Heat Pump
Communicating
Control
Hx3
Thermostat
Indoor EEV
A0826-003
C
B -
R
A +
C
B -
R
A +
C
B -
R
A +
A +
R
B -
C C
B -
R
A +
A+
R
C
B-
A+
R
GND
B-
LO
COMP
HI
COMP
O
DHUM
Y1
Y/Y2
W
R
G
C
Y
Y2
R
C
Modulating Furnace
Communicating Control
Non-Communicating
Air Conditioner
A0612-004
Hx3 Thermostat