Trane 7CONT624AS42DA, Nexia TCONT624AS42DA User's Manual And Installation Instructions

11-HD12D1-2

For HVAC related

issues, contact your

servicing dealer

Touchscreen
Comfort Control

Model 7CONT624AS42DA

User Guide and Installation Instructions

Î NOTE: A 24 Volt common and hot wire MUST be

connected to the 7CONT624A for operation.

Contents
User Guide

Features .......................................................................................................................................................................... 2

Operation .........................................................................................................................................................................3

User Settings ...................................................................................................................................................................4

Scheduling .......................................................................................................................................................................5

Enrolling into “Z-Wave” Network ........................................................................................8

About ...............................................................................................................................................................................9

Clean Screen ..................................................................................................................................................................9

Installer’s Guide

Product Specications ..................................................................................................................................................10

Installation and Wiring ................................................................................................................................................... 10

Physical Location ..........................................................................................................................................................10

Field Wiring Diagrams ................................................................................................................................................... 12

Optional Remote Temperature Sensors Installation .....................................................................................................29

Installer’s Setup .............................................................................................................................................................30

Test Mode ......................................................................................................................................................................33

Restore Defaults ............................................................................................................................................................33

Troubleshooting .............................................................................................................................................................34

Limited Warranty ............................................................................................................................................................36

FCC/IC Notice ................................................................................................................................................................38

1

User Guide

Features

TCONT624AS42DA Features

• 24v,Z-Wavecomfortcontrol

• Remoteaccessviasmartphone,tablet,orP.C.(requiresH0RQLWRUTMPRELOH$SS).

• Interactive4.3”black&whitetouchscreen

•

7Dayprogrammable,4schedules/day

• BuiltinhumiditysensorwithRHdisplay

• Filter,maintenance,humidierservicereminders

• Remotetemperaturesensingoption(1indoor/1outdoor)

• Auxiliary&compressorheatlockouts

• Dehumidication(overcooling)

• Enhanceddehumidication(cooling)

• Adjustablevariablespeedfansettings(pwm)

• EnergySavingsMode(ESM)

• Screenlockandguestlock

• Upgradablermware

• Servicetestmodes

2

User Guide

Operation

The model TCONT624AS42DAA Comfort Control provides typical operation of a forced air heating and cooling HVAC system. The TCONT624
comfort control also features a Z-Wave™ module for remote control.

:

PM

F

Cooling

Auto

Fan

Menu

Hold

Sched Mode

Cool

Normally, the Comfort Control displays the Home Screen as shown above.

Item Description Notes

Clock Display The current time is displayed in the upper left corner

of the main screen. The time will blink when the clock

See TIME/DATE for more information.
The clock will be updated by the eMonitor.

has not been set.

Dynamic Labels and Func­tion Control Buttons

The buttons are dened by the dynamic labels in each

button. As you navigate through menus, the labels for
the buttons will change.

Setpoint Display and Set­point Up/Down Buttons

The current heat or cool setpoint is displayed. These
setpoints may be set at https://emonitor.us
or by pressing the Set- point Up/Down buttons.

The setpoints will push each other if they are adjusted
to within the minimum heat/cool separation setting.

This is normally 3 degrees.
Pressing the setpoint button changes the setpoint
screen. The current mode is display at the top of the
screen. Adjust the setpoint by pressing the up or
down arrows. To change setpoint mode, press the
MODE button.

Temperature Display The Comfort Control displays the current temperature

as sensed by the internal temperature sensor.

The internal temperature sensor can be adjusted as

necessary.

Menu Button Button used to access other Comfort Control menus Other Comfort Control menus can be accessed by

pressing the MENU button.

System Mode Button Button used to change the system mode Off: System off

Heating: Heating only

Cooling: Cooling only

Auto: Heating/Cooling as necessary

EM Heat: Indoor Heat only

Fan Mode Button Button used to change the fan mode: Auto: Fan on when cooling/heating is necessary

On: Fan constantly on

Circ: Fan on for a user-selected number of minutes

per hour.

Schedule Mode Button Button used to change the schedule mode: Hold: System maintains the current temperature set-

points. Schedules are disregarded.

Run: Run the system schedule

Energy Saving Mode (ESM): Temperature setpoints in

ESM Setpoints are maintained.

3

User Guide

User Settings

User Settings allow the user to customize various settings on the 624 control. To access User Settings simply press
the Menu button once and “User Settings” will be displayed. To enter the User Settings menu, press the Select button,
then use the Next button to navigate through the options below. The default setting will be shown in brackets. After
each selection press the Done button to save changes.

Thermostat

Setting Range Description

Temperature Scale [Fahrenheit], Celsius Select the temperature display scale

Cooling RH Setpoint 30% - 60% [50%] Select the desired indoor relative humidity during cooling mode. Dehu-

midication must be enabled in the Installer Settings for this option to be

available.

Smart Continuous Fan Yes, [No] If yes is selected, continuous fan mode is disabled when indoor humidity

exceeds the Cooling RH Setpoint

Continuous Fan Airow 35% - 100% [50%] Select the desired fan speed when the Fan Mode selected is Continuous

(variable speed blower required)

Fan Circulate On Time 1 - 59 minutes, [Off] Select the desired amount of time the fan will cycle per hour when the Fan

Mode selected is Circ

Local Schedule Enable [Yes], No Select whether scheduling will be enabled or disabled

Max Heat Setpoint 55 - [90] Degrees Select the highest heating setpoint allowed

Min Cooling Setpoint [60] - 99 Degrees Select the lowest cooling setpoint allowed

H/C Delta [3] - 15 Degrees Select the minimum deadband between Heating and Cooling setpoints

Once all selections have been made, press the Done button to exit and return to Menu. Press Next to navigate to the next setting.

Energy Savings Mode

Setting Range Description

ESM Heat Setpoint 55 - 90 degrees [62] Select the desired Heating Setpoint when ESM (Energy Savings Mode) is

selected

ESM Cooling Setpoint 60 - 99 Degrees [85] Select the desired Cooling Setpoint when ESM (Energy Savings Mode) is

selected

Once all selections have been made, press the Done button to exit and return to Menu. Press Next to navigate to the next setting.

Display

Setting Range Description

Screen Timeout [0] - 90 Seconds Select how long after the last button press before the screen timeouts to a

minimized screen

Backlight Timeout 0 - 90 Seconds [20] Select how long after the last button press before the backlight dims

Backlight On Percent 0 - [100] Percent Select the screen brightness when the backlight is lit

Backlight Off Percent [0] - 100 Percent Select the screen brightness when the backlight timeout expires

Buzzer Enable [Yes], No Select whether button presses are audible

Security [Unlocked], Display Lock, Guest

Access

Once all selections have been made, press the Done button to exit and return to Menu. Press Next to navigate to the next setting.

Select security level

• Unlocked - Enables selection of all menus and settings

• Display Lock - Disables selection of all menus and settings

• Guest Access - Disables selection of all menus and settings except the

following: Raise or lower heating or cooling setpoint +/- 5 degrees and
change system mode
Note: When Display Lock or Guest Lock is selected a lock icon will appear
next to the up arrow.
Note: To disable Display Lock or Guest Access, press and hold the up
and down arrows until the lock icon disappears.

4

User Guide

User Settings Continued

User Settings allow the user to customize various settings on the 624 control. To access User Settings simply press
the Menu button once and “User Settings” will be displayed. To enter the User Settings menu, press the Select button,
then use the Next button to navigate through the options below. The default setting will be shown in brackets. After
each selection press the Done button to save changes.

Time/Date

Setting Range Description

Hour 1 - 12 am, 1 - 12 pm Select the current hour of day

Minutes 0 - 59 Select current minute of day

Day of Week Sun - Sat Select current day of week

Year 2013 - 2113 Select current year

Month Jan - Dec Select current month of year

Date 1 - 31 Select current day of month

Once all selections have been made, press the Done button to exit and return to Menu. Press Next to navigate to the next setting.

Reminders

Setting Range Description

Filtration Enable Yes, [No] Selecting yes, enables the Filter Reminder feature

Filter Period [Monthly], Quarterly, Semi-Annu-

ally, Annually

Filter Start Month [Jan] - Dec Select the Filter Reminder start month

System Maint Enable Yes, [No] Selecting yes, enables the System Maintenance Reminder feature

First Maint Month Jan - Dec Select the rst System Maintenance month

Second Maint Month Jan - Dec Select the second System Maintenance month

Once all selections have been made, press the Done button to exit and return to Menu. Press Next to navigate to the next setting.

Select how often the reminder will be displayed

Scheduling

Schedule Setup Procedure

The 624 comfort control is preset at the factory with a 7 Day energy savings schedule. Each day of the week is pre-programmed with the
following schedule:

Scheduling

Time Schedule Name Heat Temperature Setting Cool Temperature Setting

6:00 AM Wake 70 F 78 F

8:00 AM Day 62 F 85 F

6:00 PM Evening 70 F 78 F

10:00 PM Night 62 F 78 F

The schedule may be changed locally at the control with the Edit Schedule menu. You can also schedule the Thermostat at

https://emonitor.us With the eMonitor you can establish your own time period names (they will not display locally) and more than 4
time periods. The eMonitor will override this default schedule.

5

User Guide

Scheduling

Edit Schedule (Local)

Press the following button sequence to edit or create an entirely new daily schedule.

Edit Schedule

Button Press Menu Displayed What Needs to Be Done?

Press Menu from Home
screen

Press Next SCHEDULE

Press Select EDIT SCHEDULE

Press Select SELECT DAY Continue to press “Next” until the day of week to edit is displayed.

Press Select SET TIME Set the start time for each of four periods for the day displayed. Use the Up/Down

Press Next HEAT SETPOINT Use the Up/Down arrows to set the Heat set point for the period displayed

Press Next COOL SETPOINT Use the Up/Down arrows to set the Heat set point for the period displayed

Press Next Continue pressing Next and using up/down arrows until all Heat & Cool set points

After Pressing Done Copy Schedule is dis-

Press Yes to Copy COPY “_ _ _” To is

Press Done** EDIT SCHEDULE

Press Done** Home Screen is displayed

The schedule may be changed locally at the control with the Edit Schedule menu. You can also make temporary changes at

https://emonitor.us or with the eMonitor mobile apps.

USER SETTINGS

played at the top of the
screen. Yes
and No buttons are dis­played on the right side of
the screen.

displayed at the top of the
screen. Yes and
No buttons are displayed
on the right side of the
screen.

menu is displayed

buttons to set the start time for the period displayed. Wake is the default period.
Pressing the “Next” button three times cycles through the period displayed (Wake,
Day, Evening and Night).*

are set for the day displayed. After editing a start time or editing the set point
temperature for one or more periods press “Done” to save edits. If “Done” is not
pressed edits will not be saved.

Press yes to copy or no to return to Edit Schedule menu.

Pressing Yes will copy the day displayed to the next day in the week. If Yes is

pressed ve more times the scheduled will be copied to the remaining 5 days in

the week. To skip over a day and avoid copying the schedule to that day press No.

To return to the Home Screen press “Done” one more time.

6

User Guide

Scheduling

Copying Schedules

Press the following button sequence to access “Copying Schedules” from the Home Screen.

Copying Schedules

Button Press Menu Displayed What Needs to Be Done?

Menu

Next USER SETTINGS screen

Select EDIT SCHEDULE screen

Next COPY SCHEDULE screen

Select COPY FROM screen (Mon) Defaults to Monday

Next Advances to next day

Back Goes back to previous day

Select Copy To screen Select the day to copy to by pressing on Yes or No buttons until the copy to day

is selected.

Press Done COPY SCHEDULE Continue copying one days schedule at a time to another or Press Done until

the Home Screen Appears

Press Done SCHEDULE

Press Done HOME SCREEN is dis-

played

The schedule may be changed locally at the control with the Edit Schedule menu. You can also make temporary schedule changes at

https://emonitor.us or with the eMonitor mobile apps.

7

User Guide

Enroll Comfort Control into existing Z-Wave Network

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1

2

Enroll the Comfort Control into the QHWZRUN. (Inclusion)

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b Press WKH1(;7EXWWRQWRDGYDQFHWRWKH=:$9(PHQX.
c. 3UHVV6(/(&7

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3

Verify enrollment of the Comfort Control.

a. Press Menu Button on the main Comfort Control screen.

b. Press the Next Button to advance to the About screen and press the Select Button.

c. Press the Next Button to advance through the menu options to Node ID

• If the number listed there is anything other than “00”, the Comfort Control has been successfully enrolled.

• If the number listed there is “00”, the Comfort Control has NOT been successfully enrolled. In this case, repeat stepV and

verify again.

8

About

About

Setting Range

Version Current rmware version loaded on the control

ZWAVE Ver Current version of the ZWAVE rmware

Node - ID ZWAVE identication for this device

Home - ID ZWAVE identication for the connected ZWAVE network

Out - Type Identies the type of outdoor unit installed

C/O - Type Indicates whether the switchover valve (SOV) is energized in cooling or heating mode

In - Type Identies the type of indoor unit installed

Once all selections have been made, press the Done button to exit and return to Menu. Press Next to navigate to the next setting.

Clean Screen

Clean Screen

Setting Range Description

Clean Screen Yes, No Selecting yes allows the user to clean the screen without activating any

of the onscreen touch points. Use only water and a soft cloth, no harmful
chemicals.

Once all selections have been made, press the Done button to exit and return to Menu. Press Next to navigate to the next setting.

Installer’s Guide

Product Specications

Specication Description

Product Model: TCONT624AS42DAA

Product: HVAC System comfort control. Z-Wave™ RF communications enabled

Size: 5.75” wide x 3.5” height x 1” depth

Display: Fixed Segment LCD, 4” x 2.25”, with 17 character alpha numeric display

Touchscreen: Yes.

Backlight: Yes, White, Controllable, on, off, timeout

Power: 24VAC from HVAC System

HVAC System Type: Standard (gas/electric), Heat Pump, or Dual Fuel

Heat/Cool Stages: Up to four stages of heat/two stages cool

PWM Output (BK) Proprietary Variable speed motor control

Heat Pump Switchover valve: Selectable change over with cool or with heat

Auxiliary Contact Ventilation or dehumidier control

Communications: Z-Wave™ RF

Memory: Non-volatile

Date/Time: 24 hour super capacitor backup

Time is automatically updated if the control is connected toWKHH0RQLWRU

Installation and Wiring

MERCURY NOTICE

When this Comfort Control is replacing an old thermostat that contains mercury in a sealed tube, do not dispose of your old thermostat in
the trash. Dispose of properly. Contact your local waste management authority for instructions regarding recycling and proper disposal
of the old thermostat.

A listing of heating, ventilating and air conditioning wholesalers that participate in the Thermostat Recycling Corporation’s recycling
program are available at
www.thermostat-recyle.org.

Physical Location

Temperature Sensing Considerations

The624Controlisdesignedforinstallationinclimatecontrolledlivingspaces.Itisrecommendedtoplacetheunitincentral
locationswithgoodcirculation.Avoidexteriorwallsandareasnearwindows,doors,ventsorconcealedpipesorchimneys.

Correct

Correct
Placement

Placement
of the 950

of the 624

2 FEET

Optimum
Zone

5 FEET

Natural heat
dissapation
from the 924
Touch Screen

Onboard
Thermistor

Incorrect
Placement
of the 624

Heat from the 624 screen may be

trapped within the body of the 624

control by an external top-down airflow

source, such as a ceiling fan.

The onboard thermistor may be

biased by this heat causing the

displayed indoor temperature to be

Ceiling Fan

elevated.

:

PM

F

Menu

H

Co

o
ld

oling

Sched

C
o

ol

Mode

Auto

Fa

n

10

AUX/C

J2 AUX NC

C

R
W1
W2
O/B

G

BK

J2

J1

RS
RS
ODT
ODT

AUX NO

Y1
Y2 J1

AUX/C

J2 AUX NC

C

R
W1
W2
O/B

G

BK

J2

J1

RS

RS
ODT
ODT

AUX NO

Y1
Y2 J1

AUX/C

J2 AUX NC

C
R
W1
W2

O/B

G

BK

J2

J1

RS
RS
ODT
ODT

AUX NO

Y1
Y2 J1

Installer’s Guide

AUX/C

J2 AUX NC

C

R

W1

W2

O/B

G

BK

J2

J1

RS

RS
ODT
ODT
AUX NO

Y1
Y2 J1

1

CAUTION: Before proceeding with installation, verify system power has been removed.

Separate the face of the new Comfort Control from the wall plate.

Apply pressure at two tabs on top of wall plate to release it.

2

Mark two mounting holes using new wall plate.

• Pull wires through hole in center of wall plate.

• Locate the new wall plate over existing opening.

• Mark two holes with pencil.

• Use a level to verify that the two hole locations are level.

• Correct hole locations as needed.

3

Install new wall plate.

• Pull wires through hole in center of wall plate.

• Locate the new wall plate over existing opening.

• Attach wall plate to wall using two screws provided. Do not overtighten.

CAUTION: ELECTRICAL HAZARD

Î NOTE: It is not recommended that this Z-waveTM Comfort Control be mounted onto metal structures.

Metal may adversely affect the radio frequency (RF) communication between the Comfort Control and
the Z-wave

TM

bridge.

4

Attach all wires securely to the new Comfort Control.

(See the Field Wiring Diagrams on the following pages.)

Note: A wire must be connected to “C” to power the Comfort Control.

• Use the information from the Field Wiring Diagrams to match the wires to the correct terminals.

• Use 1/8” blade screwdriver to secure wires in terminals.

CAUTION: EQUIPMENT DAMAGE HAZARD

Improper wiring can lead to equipment damage. Use the eld wiring diagrams to ensure the Comfort

Control is wired properly. After wires are secure, bare wires MUST NOT touch each other. See the Field Connection Wiring Diagrams on

the following pages for specic system applications.

5

Attach the Comfort Control face to the wall plate.

a. Carefully align the face plate to the wall plate while aligning pins into wire terminals.
b. Once Comfort Control face is properly aligned, apply pressure at top and bottom of Comfort

Control face until it is secure.

6

Turn power to heating and cooling system back on.

The Comfort Control display should turn on and begin displaying information. Proceed to Installer’s Setup to congure system

J1

C
R
W1

W2
O/B

G

Y1
Y2 J1

BK

J2
RS
RS

ODT
ODT
AUX NO
AUX/C

J2 AUX NC

settings.

11

Field Wiring Diagrams

Heat/Cool Diagram 1: 1 or 2 Stage Cooling w/TAM7 Model Variable Speed Air Handler

G

W1

YI (In)

R

B/C

Y2

BK

W2

Y1

R

B

Y2

Notes:

1. Cut/remove the factory installed “BK” jumper at the indoor unit

2. “Y2” & “R” connections at outdoor are only required for two
stage units

3. Jumper “W2” to “W3” if three stages of indoor heat is available

4. “YI” and “YO” connections must be made as shown for freeze
protection and internally mounted condensate overflow circuits to
work properly

5. If third party condenstate overflow switched are installed, they
should be wired between “Y1” of the thermostat and “YI” of the
airflow control board

Sensor Options in the Installer Settings/Sensor Settings menu
Remote Sensor (connect to the RS terminals)

- None

- Replaces internal sensor

- Average with internal sensor
Outdoor Temp Sensor (connect to the ODT terminals)

- None

- Outdoor
Caution: Do not run sensor wires in the same bundle with HVAC
wires. Keep away from high voltage wiring to avoid interference.

Remote Tempurature Sensor Connections and Operation:

Aux relay
outputs

RS

C

RS

R

ODT

W1

W2

BK

ODT

NO

C

Y1

NC

Y2

O/B

G

Thermostat Connection

Outdoor

Sensor

Remote

Sensor

W3

YO

VS Air Handler &

Electric Heat

One or Two Stage

Cooling Only

(Note 1)

(Note 2)

(Note 2)

(Note 3)

(Note 5)

(Note 4)

Heat/Cool Diagram 2: 1 Stage Cooling w/“GAM5A” & “TAM4” Model Air Handler

G

W1

YI (In)

R

B/C

W2

B

Y

Notes:

1. Jumper “W2” to “W3” if three stages of indoor heat is available

2. “YI” and “YO” connections must be made as shown for freeze
protection and internally mounted condensate overflow circuits to
work properly

3. If third party condenstate overflow switched are installed, they
should be wired between “Y” of the thermostat and “YI” of the
airflow control board

Sensor Options in the Installer Settings/Sensor Settings menu
Remote Sensor (connect to the RS terminals)

- None

- Replaces internal sensor

- Average with internal sensor
Outdoor Temp Sensor (connect to the ODT terminals)

- None

- Outdoor
Caution: Do not run sensor wires in the same bundle with HVAC
wires. Keep away from high voltage wiring to avoid interference.

Remote Tempurature Sensor Connections and Operation:

Aux relay
outputs

RS

C

RS

R

ODT

W1

W2

BK

ODT

NO

C

Y1

NC

Y2

O/B

G

Thermostat Connection

Outdoor

Sensor

Remote

Sensor

W3

YO

Non-VS

Air Handler &

Electric Heat

One Stage

Cooling Only

(Note 1)

(Note 2)

O

Heat/Cool Wiring Diagrams

Installer’s Guide

12