DXstring Smart Thermostat for Home Instruction Manual

Smart Thermostat for Home

Product Information

Specifications:

• Continuous fan operation
• Manual mode available in the menu
• Touch button interface
• Interval-based fan circulation
• Automatic adjustment of fan running time

Product Usage Instructions

Installation:

1. Power off your system and remove the old thermostat. Note: Do
   not remove the wall plate.

2. Take a picture of your old thermostat wires for reference.

3. Label the wires with tags.

4. Please confirm if your old thermostat has a C wiring (Blue
   line).

5. If you have Plan A (compatible wiring):

6. Remove the wall plate by unscrewing it from the wall and gently
   pulling it out.

7. Connect the mounting plate and wire the cables through the
   holes in the temperature controller mounting plate.

8. Connect the wires to the base. Connect the R or RC wire into
   the RC terminal, and connect other wires to their corresponding
   terminals.

9. Attach the thermostat on the base.

10. If you have connected both the RC-wire and the RH-wire to the
    wall plate, adjust the DIP switch on the back of the thermostat
    accordingly.

11. Power on your system to complete configuration.

12. If you have Plan B (power module installation):

13. Find and open the HVAC system’s cover.

14. Take a picture of the wires connected to the terminals of your
    old thermostat for reference.

15. If your system has the required wires (WC, G, Y, R), install
    the power module.

16. If your system does not have these wires, it may not be
    compatible with the power module.

17. Label the wires from the control board to the old
    thermostat.

18. Disconnect the wires of W/W1, Y/Y1, and R from the control
    board to the thermostat.

Frequently Asked Questions (FAQ):

1. 1. What does continuous fan operation mean?

Continuous fan operation refers to the fan running continuously
to circulate indoor air.

1. 1. What is manual mode in the menu?

Manual mode is a setting available in the menu that allows you
to manually control the operation of the thermostat.

1. 1. How does the thermostat automatically adjust the running time  

   of the fan?

The thermostat automatically adjusts the running time of the fan
based on the system’s needs.

1. 1. What should I do if my old thermostat does not have a C  

   wiring?

If your old thermostat does not have a C wiring, you can follow
Plan B for installation, which involves using a power module.

1. 1. What is the purpose of labeling the wires?

Labeling the wires helps in correctly connecting them to the new
thermostat and ensures proper functionality.

2. Fan Runs continuously
3. Menu Manual mode
4. Touch Button

Runs at intervals to circulate indoor air
Automatically adjust the running time of the fan according to the system

Installation
1. Power off, remove the old thermostat. Note: Do not remove the wall plate;
Do not remove the wall plate

Old thermostat

Temporary manual Programming mode

2. Take a picture of your old thermostat wires how to connect to the terminal;

System Fan Menu Clock Turn up Turn down

5. Screen Set heat temp. Set cool temp. Outdoor temp.

Sunny Cloudy Rain Snow

3. Label the wires with Tags;

5

6

4. Please confirm old thermostat if have C wiring(Blue line).

Yes Plan A No Plan B

W1

C

Terminal designation

Terminals Rh Rc C W1 W2 Y1 Y2 G O/B
S
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What it means
24VAC primary for heating 24VAC primary for cooling
24VAC Common Wire Heat Relay (Stage 1) Heat Relay (Stage 2) Compress Relay (Stage 1) Compress Relay (Stage 2) Fan Relay Heat Pump Changeover Valve Optional wiring module terminal to combine Y and G, while reserve an extra in- wall wire to power on the thermostat

Plan A: 1. Remove the wall plate Unscrew the wall plate from the wall and gently pull it to ensure the wires do not fall back into the hole;
2. Connect the mounting plate Wire the cables through the holes in the temperature controller mounting plate;
Wiring backplane
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3. Connect the wires to the base Note: Connect the R or RC wire into the RC terminal, Connect other wires to the corresponding terminals;

5. Attach the thermostat on base

4. DIP Switch If you have connected both the RC-wire and the RH-wire to the wall plate, adjust the DIP on the back of the thermostat to Disconnect ,otherwise switch it to Connect;
DIP Switch
&

6. Power on your system Once powered up, the thermostat screen will light up and display the setup wizard to complete configuration.
ON

9

10

Plan B:
What is Power Module? Power module requires your system to have the following wires:

WC G Y R

4 wires: W/W1, Y/Y1, G, and R (or Rc or Rh) or 3 wires: Y/Y1, G, and R (or Rc or Rh)

Install the Power Module
1. Find the HVAC terminals Find and open the HVAC system’s cover. take a picture of the wires connected to the terminals of your old thermostat, you may need to reference this photo later

RC

WCS R Power module

Y1

W1

G

If you do not have these wires, your system may not be compatible with the power module.

To HVAC control board

The C-wire is used to provide Power module power to the thermostat. If your system does not have the “C” wire, can use the power module to power your thermostat using the existing wires. There are 2 sides with connections, 4 terminals is for thermostat, 5 terminals is for the control board connections.

WC G Y R
WCS R To thermostat

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WC G Y R

WC G Y R

2. Label the wires Only label the wires from the control board to the old thermostat

Control board

WC G Y R

W

G Y

R

To thermostat

C

CR

RC

Label the wires at your thermostat

RH O/B

RG

G

RC Y/Y1 Y/Y1

RH Y2 Y2

O/B W/W1 W/W1

• W2 W2

If you don’t have a c-wire, you will need the labele below

Label the wires at your control board

RC RC R

RG

G

C

C RC RC W/W1 W/W1

S

S RH RH Y/Y1 Y/Y1

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3. Disconnect the wires Disconnect wires of W/W1, Y/Y1, R to thermostat from control board
HVAC control board

WC G Y R

W

GY

R

To thermostat

4. Connect the wiring module Reconnect these wires to the 4-terminal side of the power module. The wires and corresponding terminals are show below

WWCCGGYYRR

Power module

WC G Y R

5. Connect the wires 5-terminal connect to HVAC control board side
HVAC control board
WC G Y R
WC G Y R
Power module

WCS R

W G

YR

To thermostat

6. Position the wiring module The power module should be installed between your thermostat wiring and your control board. Install it at the right position then close the HVAC cover panel securely and return to your thermostat

WC G Y R

WCS R

WG Y

R

To thermostat

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WC G Y R WCS R

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7. Add new tags Add new taps to the following tags to simplify your wiring;

R/RC/RHRC; GC;Y/YIS

G RC
RC

Y1

W1

CS

C

CR

RC

Label the wires at your thermostat

RH O/B

RG

G

RC Y/Y1 Y/Y1

RH Y2

Y2

O/B W/W1 W/W1

• W2

W2

If you don’t have a c-wire, you will need the labele below

Label the wires at your control board

RC RC R

RG

G

C

C RC

RC W/W1 W/W1

S

S RH

RH Y/Y1 Y/Y1

8. Connect the wires to the wallplate First connect 3 wires as shown below;
RC,C,S
W2 W1 O/B RH C Rc

W1

RC RC

C

S

G

Y1

15

S G Y1 Y2 JAD NTC

9. DIP Switch Adjust the DIP switch on the back of the thermostat to the Connect;
DIP Switch
&

10. Attach the thermostat on base 11. Power on your system Once powered up, the thermostat screen will light up and display the setup wizard to complete configuration.

W2 W1 O/B RH C Rc

RC

W1

RC

C

S

G

Y1

S G Y1 Y2 JAD NTC

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Operation

1. Selection System Mode Press to select the mode of: Cool(Cooling only); Heat(Heat only); Auto(Automatic control of heating and cooling based on ambient temperature); EM heat(Emergency heating); Off(Off system).

2. Selection Fan Mode

Press

to select the fan mode of: On(Runs continuously);

Auto(Automatically adjust the running time of the fan according

to the system); Circ(Runs at intervals to circulate indoor air)

3. Selection Menu Press to select the operating mode of: Permanent Hold (Manual mode); Temporary Hold(Emergency heating; Using Schedule(programming mode).

4. Set time Press , the min of time will flash,touch incon / to set your time; Press , the hour of time will flash, touch the icon / set your hour; Press , the week of time will flash, Wait for 4-5 seconds, the settings will be saved automatically.

5. Child lock Press & 3sec to set locked or unlocked.

6. Programming mode Press Four times, Hour will flash, you will see the wake on the screen, means you start setting schedule for programming mode. Press / to set time and temperature. You can set Wake, Away, Home, Sleep 4 time period temperature.
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Such as: Schedule
Wake Away Home Sleep

Time
6:00AM 8:00AM 17:30PM 21.30PM

Heat

Cool

7222 7222)

7222 7222

7222 7222

7222 7222

7. Advance Options: Press & for 3 seconds at the same time, Press to change the different items, you can press / arrows to change settings.

01 Temperature Calibration 02 Standby brightness 03 Min temp set
04 Max temp set
05 1 stage compressor delay time 06 2 stage compressor delay time 07 Fan off delay time 08 Cycle time for fan cycle mode

-9 to 9 , default -4 3 to 99 , default 20 5-15 ,41-59 default 5,41 15-35 ,59 default : 35,95
1-5, default 1
1-5, default 1
1-5, default 1 1-11(5-55), default 2 (10)min

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09 Whether to turn on the outdoor compressor at the lowest temperature 10 Compressor outdoor minimum outdoor temperature 11 Turn on the maximum temperature of the auxiliary heat 12 Auxiliary heat on outdoor maximum temperature 13 Whether the heat pump compressor and auxiliary heat are turned on at the same time
14 Interval temperature
15 Cool& Heat set 16 & display 17 Reset to facture set 18 Filter replacement countdown reminder 19 Enable dual energy
20 Production line test
21 Verison number
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0: no 1: Yes , default 0
: 0-20,: 32-68 default : 2,: 32
0:no 1:Yes , default 0
0-18,32-64 default :18,: 64
0:no 1:Yes , default 1
1.5-5 ,3-9 default : 1.5 ,: 3 0 to 3 , default 3 0: 1: , default 1 0:no 1:Yes , default 0 0 to 180 , default 180 days 0:no 1:Yes , default 0 0Normal Code ,1: test Code default 0 U1

Wiring diagrams Below are the wiring diagrams for common HVAC equipment.

Conventional heating and cooling system

Air conditioner Y1 Y2 C

Furnace Y1 Y2 W1 W2 R C G

S

W2

G

W1

Y1

O/B

Y2

RH

JAD

C

NTC

Rc

For dual heat and cooling system,if applicable
Remove the jumper between Rh, Rc, or R terminals, adjust the DIP switch on the back of the thermostat to ‘Disconnect’ if you have connected both RC-wire and RH-wire to the wallplate, otherwise switch it to the ‘Connect’ side
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