Hotowell HTW-31RT Programmable Radiator Thermostat User Manual

Hotowell HTW-31RT Programmable Radiator Thermostat

INTRODUCTION

Thermostatic Radiator Valves (TRVs) sense the air temperature around them and regulate the flow of water through the radiator which they are fitted to. They do not control the boiler.
They should be set at a level that gives you the room temperature you want. These settings may have to be different in each room, and you should set the TRVs to suit each room and then leave them to do their job.
Turning a TRV to a higher setting will not make the room heat up any faster. How quickly the room heats up depends on the boiler size and setting, and the radiator size. Turning a TRV to a lower setting will result in the room being controlled at a lower temperature, and saves energy. TRVs need a free flow of air to sense the temperature so they must not be covered by curtains or blocked by furniture.

Functions

• M30 x 1.5 Universal Type Head to body connection
• LCD display can be clearly read with the background lighting.
• easy for installation
• Five buttons make it easy to use.
• PID control
• 7 days program(4 periods/day)
• The display shows the set temperature or measured temperature, time.
• Temperature display in degrees Celsius.

Technical data

• Thermostat operating voltage: 2 x AA1.5 V, alkaline batteries.
• Backup storage: EEPROM
• Switching options: 7 days of programming (4 periods/day)
• Frequency: 2.4Ghz
• Temperature settings: 5°C ~ 35°C, in 0.5℃
• Accuracy: ± 1℃
• Control: PID
• Thermostat dimensions: φ55*69mm
• Max Extention 5.0mm
• Color: White
• IP protection rating: 20.
• Certification: CE， ROHS,RED

Display and buttons

Battery Installation and valve installation( Take M30 adaptor as an example)

Initialization and Adaption

1. Once the battery is installed, the TRV display INIL, which means initialization.
2. Install the TRV onto your radiator.
3. Then the TRV display AdAP, then press UP button （change 0 to 1), which means the TRV will adapt itself to the stroke of your valve body. To do this, the TRV will now be opened and closed twice to store the endpoints.

Mode setting
Press M button to choose Manual mode/Away mode/PRG mode.

Clock & Weekday setting

Press and hold P button for 5s, set the clock (Min-Hour-Weekday) by pressing UP and DOWN button, each press of P button will go to next item setting.

7 days programmable setting

After finish the clock setting, press P to go to PRG schedule setting. Set the schedule (Weekday-Period-Start time-Temp.) by pressing UP and DOWN button, each press of P button will go to next item setting.

Default Setting:

Period

1

2

3

4

5

6

Time

Temp.

Time

Temp

Time

Temp

Time

Temp

Time

Temp

Time

Temp

12345(Mon.~Fri.)

6:00

25℃

8:00

20℃

11:30

25℃

12:30

20℃

17:00

25℃

22:00

20℃

6(Sat.)

8:00

25℃

11:30

20℃

12:30

25℃

17:00

20℃

22:00

25℃

23:30

20℃

7(Sun.)

8:00

25℃

11:30

20℃

12:30

25℃

17:00

20℃

22:00

25℃

23:30

20℃

Open window detect function (OWD function)
When the Open Window mode is enabled in the parameter setting, the system will automatically stop heating when it detects a sudden drop of room temperature (2°C in 15 minutes as default). This is normally caused when a window or door is opened without turning off the heating device.
The device will return to the previous mode of operation after 30mins, then OP disappear. Pressing any button will exit OWD function during the heating off period.

Pair with Host device

1. Make the host device(eg.gateway) is on the status waiting for adding slave thermostats. (Please pair the gateway with Mobile app first.)
2. Enter gateway page on the mobile app, and press the button for adding sub-devices, find the thermostat and click to add.
3. Turn HTW-31RT off by pressing ON/OFF button, then long press M button until it shows a “0 and signal icon”, then press UP button, when HTW-31RT display 3 or signal icon stop moving, means code pairing done. Press ON/OFF button to return, and press again to turn it on.

Parameter setting

Turn off the thermostat, Press and hold M and UP buttons for 3s, until it shows item 01, each press of M button will go to next item setting, adjust the range by using UP and DOWN button.

Menu 01	Description Temp. calibration for internal sensor		Range -8 ℃~8 ℃		Default Value 0℃
02	Set Point Max.		5 ℃ ~35℃		35 ℃
03	Set Point Min.		5 ℃ ~35℃		5 ℃
05	Frost Protection Temp.		5 ℃ ~15℃		5 ℃
10	Display		0: Room temp. 1: SET temp.		0
12	Open window detect function		1: ON	0: OFF	0
13	OWD Detect Time		2~30mins		15mins
14	OWD Drop temp. select (within detect time）		2.3.4’C		2 ‘C
15	OWD Delay time select (Return to previous working status)		10~60min		30mins
17	Factory reset		0: No		0
			1: Yes, and then press On/off button for 5s, wait until thermostat restart
18	Software version
19	Software version
31	Battery voltage		Unit: 10mv
32	PID	P-band select	2 ℃ ~10℃		7℃
33	PID	I-time select	30~90min		30min

Mounting

Reference:

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Hotowell HTW-31RT Programmable Radiator Thermostat User Manual

Hotowell HTW-31RT Programmable Radiator Thermostat User Manual