Saswell T18UTW-7-WIFI User manual

T18UTW-7-WIFI
T18UTW-7-WIFI
INSTALLATION
MANUAL
www.saswell.com
INSTALLATION MANUAL
SASWELL CONTROL

Contents
01
THERMOSTAT INSTALLATION
Install your thermostat (with C wire) 13
Install your thermostat (without C wire) 22
Android IOS Accessory 40
Start your install 07
Link APP 49
Thermostat introduction 01

WIFI Status
Indoor Temperature
System mode
Humidity
Quick changes
Menu
Voice control
Alerts and
reminders
Here’s what you will see on the home screen: System mode
Shows your current setting:
(heat/cool/auto/off/aux)
Humidity
Shows the indoor humidity
in your home.
Indoor temperature
Shows the indoor temperature
in your home. Click to slide up
or down to adjust preferred
temperature.
Menu
Allows you to control your system,
schedule a vacation, and more.
Quick changes
Touch this button to easily Check the
time, set the current mode, adjust the
brightness/sound,switch between home
and away.
Voice control
Allows you to enable / disable
microphone.
Status
Ventilator/dehumidifies / humidifies
Alerts and reminders
The alarm sign will appear if the
temperature or humidity exceeds
the designed limit.
0201

165mm
129mm
10mm
110mm
110mm
28.6mm
Back plate
Thermostat
Thermostat appearance
* Power supply: 24VAC(18-30VAC)60Hz
* Ambient temperature : 32°F~122°F(0°C~50°C)
* Temperature setting range: 41°F~95°F(5°C~35°C)
* Temperature setting accuracy: 1°F(0.1°C),1%RH
* Temperature display range: 41°F~99°F(5°C~37.5°C)
* Humidity range: 20%~90%RH
* Operating temperature range: ±1°F(0.5°C), ±1%RH
* Transport temperature range: 14°F~140°F(-10°C~60°C)
* Output: Relay Load Imax 24V/(1A)
* Wifi Communication protocol : TCP/IP,MQTT
* Wifi Frequency : 2.412GHz-2.4848GHz
* RF antenna emission frequency: 915MHz(not the standard)
* Wireless sensor control quantity: 10pcs(Not standard)
* IP rating: IP 21
* Color: black
* Thermostat size: L110mm*W110mm *H28.6mm
* Backplate size: L165mm*W129mm *H10mm
T18UTW-7-WIFI
0403

T510-45(Electric Control Module)
* Power supply: 24VAC(18-30VAC) 60Hz
* Ambient temperature : 32°F~122°F(0°C~50°C)
* Shipping temperature：14°F~140°F(-10°C~60°C)
* Output: Relay Load Imax 24V/(1A)
* IP rating: IP 21
* Color:white
* Size: 67.1*47.5*30.3mm
67.1mm
47.5mm
30.3mm
Five-core lead length 500mm (18#AWG) input: R,C,G,Y,G
R: Air conditioning equipment 24VAC power input
C: Air conditioning equipment 24VAC power supply public input
G: Air conditioner fan input
Y: Air conditioning equipment refrigeration compressor input
W: Air conditioning equipment heating input
Terminal output: R,C,S,W
R: Converter 24VAC power output
C: Converter 24VAC power supply common output
S: Converter control terminal (with G and Y collinear control)
W: Converter heating terminal
T18UTW-7-WIFI Intelligent voice control thermostat
Power supply: 24VAC (18-30VAC) power supply through RC or RH, C terminal
(no C line can be transferred through four-wire to five-wire module)
Support stages: 1H/0C,0H/1C,1H/1C,2H/1C,2H/2C,3H/2C,4H/2C
Terminal 1:RT+,RT-,S,G,Y1,Y2,O/B
RT+: External sensor + terminal input
RT-: External sensor - terminal input
S: Control terminal input (with G and Y collinear input)
G: Fan output
Y1: One stage cooling or heat pump heating output
Y2: Two stage cooling or heat pump heating output
O/B: Four-way directional valve output
Terminal2: C,RC,RH,W1,W2,AC-,AC+ (, AC-, AC+ function software and hardware design are
reserved, not standard, follow-up optional)
C: 24VAC power supply common input
RC: 24VAC cooling or single power input
RH: 24VAC heating power input
W1: One stage heating output
W2: Two stage heating output
AC-: Single wire is empty, two wires are passive common output
AC+: Humidification or dehumidification, fresh air auxiliary equipment output (only one of the three
types of equipment can be selected for control, 24VAC output when single wire)
0605

08
THERMOSTAT INSTALLATION
1. Fasten the mounting back
plate and mounting plate to
the mounting box and tighten
the screws
2. After fastening and installing
the back plate and the mounting
plate, snap into the display part
3. The installation
is complete
07
STEP1
Power off your Heating , Ventilation , and Air Conditioning(HVAC) system by using
the master switch or circuit breaker box. This is important for your safety.
STEP2
Confirm your system is off by turning on your heat(during winter)or your AC(during
summer).Wait a few minutes-you should not feel air coming from your vents.
STEP3
Remove your old thermostat cover from the wall.
1.Look for your master switch or circuit breaker box in the basement,attic,utility
close,or behind a wall panel near the thermostat.
2.If you have a boiler,check to see that the main flame is extinguished.
3.Many thermostat simply pop off or unclip from the base,while others may have
screws that you will need to remove.
TIPS:
Two ways to install thermostat
1
2
Tighten the screws and
snap into the display part.

CHECKPOINT:COMPATIBILITY
√
Does your old thermostat’s backplate have any of these indicators?
L1 L2
WARNING
HIGH VOLTAGE
110VAC
OR
120VAC
OR
240VAC
YES
Sadly,you might not
be compatible.
you can double-check
at compatibility.
NO
Great,please continue
to the NEXT PAGE.
STEP4
Take a picture of the wires connected to the terminals of your old thermostat.
you may need to reference this photo later on.
1009

CHECKPOINT:C WIRE
√
Do your have a C wire connected to you old thermostat ?
YES
Great,please continue
to the NEXT PAGE.
NO
Go to install
with a ECM.
RC RH G Y W C RC RH G Y W C
TIPS:
The wiring on your old thermostat may look different, just check to see if there’s
a C wire. 1211
FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.
This equipment should be installed and operated with minimum distance 20cm between the radiator
& your body.
FCC Warning
This device complies with Part 15 of the F CC Rules. Operation is subject to the
following two conditions:
(1) This device may not cause harmful interference,and (2) this device must accept any interference
received, including interference that may cause undesired operation.
NO TE 1: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and on, the user is encouraged to try
to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
-Consult the dealer or an experienced radio/TV technician for help.
NO TE 2: Any changes or modifications to this unit not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment.
FCC ID:2AOIFT18UTW

13 14
STEP5
Carefully disconnect and label the wires from your old thermostat one at a time,
using the labels provided.
RC RH G Y W C
TIPS:
If you have a jumper between RC, RH, OR R, leave it alone.
Only label the wires that run from your wall into a terminal block.
RC
C
G
Y1W 1
W
1
Install your thermostat
with a C wire
If you have a C wire, it will power your thermostat. you won’t need the Electric
Control Module included in the box.
TIPS:
TO install accessories(humidifier,dehumidifier or ventilator)please refer to the wiring
diagrams at wiring.

15 16
STEP7
Decide if you want to use the Base platewith your thermostat.
The Base plateis useful if you want to hide marks or holes left on the wall by your
old thermostat.
If using the Base plate,align the mounting holes on the Base plateand backplate and
press them into place together.
C
RC
RH
W1
W2
AC+
AC-
RT
+
RT-
S
G
Y1
Y2
O/B
Base plate
Backplate
( Please fill the exposed
hole on the Base plate with
the rubber plug we provided. )
STEP6
Unscrew the mounting plate of your old thermostat to remove it from the wall.
RC RH G Y W C
RC
C
G
Y1W 1
W
1
！WARNING:
Be careful, as some thermostat may contain mercury.
Recycle your old thermostat safely with your local hazardous waste facility.

CHECKPOINT: INSERT YOUR R WIRE(S)
√
Do your have more than one R wire?
(That includes R,RC,and RH)
YES
Insert your wires:
R or RC → RC
RH → RH
NO
Insert your single wire:
R,RC,or RH→ RC
17
C
RC
RH
W1
W2
AC+
AC-
RT+
RT-
S
G
Y1
Y2
O/B
C
G
Y1
W
1
RH
C
RC
RH
W1
W2
AC+
AC-
RT+
RT-
S
G
Y1
Y2
O/B
RC
C
G
Y1
W
1
RC
RH
18
STEP8
Pull the wires through the hole in the middle of the backplate and then attach the
backplate to the wall using the drywall anchors and screws provided.
TIPS:
Use a 3/16'' drill a hole for the drywall anchors.
C
RC
RH
W1
W2
AC+
AC-
RT+
RT-
S
G
Y1
Y2
O/B
RC
C
G
Y1
W
1
( Please use the rubber plug
we provided to cover this screw)

20
STEP11
Gently press your thermostat into the backplate until it “clicks” into place.
TIPS:
If the thermostat “rocks”or is not flush with the wall,be sure the excess wires are
pushed all the way into the wall.
19
C
RC
RH
W1
W2
AC+
AC-
RT+
RT-
S
G
Y1
Y2
O/B
RC
C
G
Y1
STEP9
Insert your remaining wires into the side (not the front) of their corresponding
terminal blocks.
TIPS:
1.Press the terminal block levers to insert the wires more easily.
2.When a wire has been connected correctly, the level on the block will lower.
STEP10
Tug on the wire gently to ensure they are securely connected.
W
1

21
Install your thermostat
without a C wire
If you don’t have a C wire, you will need to use the Electric Control Module
included to reliable power your thermostat.
22
STEP12
Turn the power to your HVAC system back on using the master switch or at the
circuit breaker box.
Congratulations, you did it!
Say hi to your new thermostat! To complete your setup and registrations,
follow the instructions on your thermostat screen.

18
CHECKPOINT: 3 OR 4 WIRES
√
The Electric Control Module requires your system to have either of the following:4 wires
W1,Y1,G,and R(or RC or RH)
Do you have these wires?
YES
Great,please continue
to the NEXT PAGE.
NO
Please check compatibility
or contact us!
RC RH G Y W C RC RH G Y W C
The Electric Control Module
will work with your system!
STEP5
Take your Electric Control Module, wire labels, tools, your smart-phone, and go to
your HVAC system.
Thermostat wire labe
Label wires at your:
2423

2625
STEP6
Open your HAVC system’s cover to
reveal at control board.
STEP7
Take a picture of the wires connected
to your control board.
You may need to reference
this photo later on.
HVAC system contain high voltage wires. Use caution when working with the control
board. If you’d rather leave it up to a professional.
WARNING:
！
STEP8
Label only the R,Y,or Y1,G,and W or
W1 wires with the matching labels
provided.
If you have more than one wire going
into these terminals, only label those
going to your thermostat.
STEP9
Disconnect the wires labeled
R,Y,G,and W from the control board.
Y
W
G
C
R
Y
W
R
G
Wires going
to You're A/C
(ignore this )
Wires going to
Your thermostat
control board
Control board
Y
W
G
C
R
Y
W
G
C
R
RC/RH R
G C
Y S
* Important＊
Attention please，at this time, you need to
change the wire number. As follow:

27 28
STEP10
Connect the wires you disconnected
from the control board into their
matching green terminal blocks on
the Electric Control Module .
STEP11
Tug on the wires gently to
ensure they are securely
connected.
TIPS:
1. Insert the wires more easily.
2.When a wire has been connected correctly ,tight screw to ensure the wiring.
STEP12
Connect the five wires coming out of your Electric Control Module to their
correspending terminals on the control board .
Y
W
G
C
R
control board
s
W
R
c
S
W
C
R
Electric Control Module
S
W
R
C
S
W
C
R
C
S
s
c
S
W
R
C
S
W
C
R
C
S
Y
W
G
C
R

3018
CHECKPOINT: Electric Control Module
√
Check that you have installed the Electric Control Module correctly. It should be
installed between your thermostat wiring and your control board.
29
STEP13
Mount the Electric Control Module inside your HAVC system, taking care not to strain
the wires.
Close the HVAC cover panel securely return to your thermostat.
TIPS:
Make sure your HVAC panel is fully closed .Some systems will not turn on if the
cover panel has not been closed properly.
BEFORE AFTER

RC
RH
G
Y
W
C
31 32
STEP14
Back at your thermostat:
Carefully disconnect and label the wires from your old thermostat one at a time,
using the labels provided. If you have a jumper between RC,RH,or R leave it alone.
Only label the wires that run from your wall into a terminal block.
STEP15
Unscrew the mounting plate of your old thermostat to remove it from the wall.
WARNING:
Be careful, as some thermostat may contain mercury.
Recycle your old thermostat safely with your local hazardous waste facility.
！
R/RC/RH RC
G C
Y S
W W1
* Take a phone before disconnect the
wires from your old thermostat ,
You may need to reference this photo
later on. RC RH G Y W C
RC
W1
C
S
RC RH G Y W C
RC
W
1
C
S
* Important＊
Attention please，at this time, you need to
change the wire number. As follow:

33 34
STEP17
Pull the wires through the hole in the middle of the backplate and then attach it to
the wall using the drywall anchors and screws provided.
Use a 3/16'' drill a hole for the drywall anchors.
STEP16
Decide if you want to use the Base plate with your thermostat.
The Base plate is useful if you want to hide marks or holes left on the wall by your
old thermostat.
If using the Base plate, align the mounting holes on the Base plate and backplate and
press them into place together.
RT+
RT-
S
G
Y1
Y2
O/B
C
RC
RH
W1
W2
AC+
AC-
Base plate
Backplate
( Please fill the exposed
hole on the Base plate with
the rubber plug we provided. )
C
RC
RH
W1
W2
AC+
AC-
RT+
RT-
S
G
Y1
Y2
O/B
RC
C
G
Y1
W
1
( Please use the rubber plug
we provided to cover this screw)
TIPS:

35 36
STEP18
First, connect these 4 wires as show: RC,C,S,W1. Then connect any remaining
wires to their corresponding terminal.
TIPS:
Press the terminal block levers to insert the wires more easily.
C
RC
RH
W1
W2
AC+
AC-
RT+
RT-
S
G
Y1
Y2
O/B
RC
C
W/W
1
Y1
S
STEP20
Tug on the wire gently to ensure
they are securely connected.
CHECKPOINT: DON’T SKIP AHEAD
√
Did you connect the correct
wires to the RC,C,S,W1
terminals, as shown below?
YES
Please continue to the
NEXT PAGE.
NO
Please ensure that your
wiring is as shown above
C
RC
RH
W1
W2
AC+
AC-
C
RC
RH
W1
W2
AC+
AC-
RT+
RT-
S
G
Y1
Y2
O/B
RC
C
W
1
S