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- ENGLISH -

THW01B0000SE 031861 190319

1

BATTERY POWERED WEEKLY DIGITAL PROGRAMMABLE THERMO-HYGROSTAT

GENERALITIES

This device is a battery powered weekly digital programmable thermo-

hygrostat for the control of room temperature and relative humidity on 

three levels: Comfort, Economy or Off / Antifreeze. The device can be 

used in heating and cooling plants.

The programmable thermo-hygrostat has a large backlit LCD display 

for all functional indications, the program schedule set, the room 

temperature reading, the relative humidity reading, or, as desired, the 

actual time.

Allows to set up to 7 different programs, one for each day of the 

week, with a minimum intervention time of 1/2 hour over 24 hours.

In addition, the device offers the possibility of setting the Antifreeze 

temperature value, dew point control and sensor Offset value 

adjustment.

DESCRIPTION OF CONTROLS

Fig. 1

F

G

H

I

B

A

C

D

E

LEGEND

A

  Button with double function:

 - 

In normal operation: activates the function 24 hours Manual / 

Permanent Manual / Automatic.

 - 

In schedule programming: sets the regulation temperature into 

Economy mode.

B

  Button with double function:

 - 

In normal operation: turns on and off the programmable thermo-

hygrostat.

 - 

In schedule programming: sets the regulation temperature into 

Off / Antifreeze mode.

C

  Button with triple function:

 - 

In normal operation: displays current time or temperature.

 - 

In schedule programming: sets the regulation temperature into 

Comfort mode.

 - 

In ‘Set-Point temperatures settings’, shows either the Comfort or 

the Economy temperature

D

  Changes  the  setpoint  temperature  and  the  configuration 

parameters (increasing the value).

E

  Changes  the  setpoint  temperature  and  the  configuration 

parameters (decreasing the value).

F

  Gives access to the user parameters list.

G

  Button with double function:

 - In normal operation updates the values sampled by the 

thermostat.

 - In ‘User parameters settings’, enables the selected parameter 

modification and confirms the modified value.

H

  Screw hole for fixing the programmable thermo-hygrostat body to 

the wall mount plate

I

  Battery compartment

DISPLAY SYMBOLS

In the following is explained the meaning of some symbols which may 

appear on the display:

Battery status indication.

Flashing:

Batteries discharged; replace batteries.

Temperature regulation in Comfort mode.

Temperature regulation in Economy mode.

Temperature regulation in Off / Antifreeze mode.

Chronostat off: antifreeze function active, the display shows 

‘OFF’.

Heating mode enabled.

Cooling mode enabled.

Activation in de-humidificationor humidification.

24h

Temperature regulation in Comfort mode for 24 hours.

24h

Permanent temperature regulation in Comfort mode.

P

Fixed

: shows access to the user parameters

Flashing

: meansthat the selecteduserparameter can be modified

Flashing:

Cleaning program active (the remaining time is shown on the 

display).

Flashing:

Vacation program active (the remaining time is shown on the 

display).

Fixed:

Indicates that the telephone interface is active.

Flashing:

Indicates that the remote command received by the 

telephone interface has been overridden by another local 

request through the chronostat buttons.

Fixed:

The temperature shown on the display is the one measured by 

the internal sensor, yet the temperature regulation takes place 

according to the remote sensor.

Flashing:

Both temperature shown and room temperature regulation refer 

to the internal sensor.

Fixed:

The temperature shown on the display is the one measured by the 

remote sensor, yet the temperature regulation takes place according 

to the internal sensor.

Flashing:

Both temperature shown and room temperature regulation refer to 

the remote sensor.

STARTING UP

When starting up for the first time:

-  Insert the batteriesobserving the polarity markings shown in the battery 

compartment (see ‘INSERTION / BATTERIES REPLACEMENT’).

-  Set the time and day of the current week.

- Set the operating mode of the thermostat (user parameter ‘

C-H

’): 

Heating (factory set) or Cooling.

Setting the current time and day

To set the clock of the programmable thermo-hygrostat carry out the 

following steps:

1.

 Open the flap of the battery compartment.

2.

 Keep the ‘

OK

’ button pressed for at least 2 seconds; the hour digits 

will start flashing.

3.

 Set the hour using buttons ‘   ’ and ‘   ’.

4.

 Confirm by pressing ‘

OK

’; the minute digits will start flashing.

5.

 Set the minutes using buttons ‘   ’ and ‘   ’.

6.

 Confirm  with  ‘

OK

’; the display shows the word ’dAY’ and the  

square symbol corresponding to the current day flashes.

7.

 Set the current day of the week using buttons ‘   ’ and ‘   ’ 

(the current day is highlighted by a box surrounding the number 

corresponding to the day of the week, 1 Monday .. 7 Sunday )

8.

 Confirm by pressing ‘

OK

’; the output of the time and day setting is 

automatic.

Time/Temperature/Humidity Display

By repeatedly pressing the ‘ 

 ‘ the display can alternately show the 

actual time, the room temperature (in °C) read by the internal sensor, 

distinguished by the ‘   ‘ icon, the room temperature (in °C) read by 

the remote probe (if connected) distinguished by the ‘ 

 ‘ icon and the 

room humidity (in %RH) read by the internal sensor, distinguished by 

the ‘   ‘ icon. The temperature and humidity readings are displayed 

corrected by the Offset value set.
Note:

If the ‘ 

rEG 

’ parameter is set at ‘ 

In

 ‘, but an error is detected on the 

internal sensor, the display will show ‘ 

SEnS E xx 

’. In this situation 

the adjustment will be automatically interrupted and both relays will 

be placed in the Normally Open position.

If the ‘ 

rEG

 ’ parameter has been set at ‘ 

Out

 ‘ but the remote 

probe has not been connected or is damaged, the display will show 

the respective wording ‘ 

SEnS OPEN

 ‘ or ‘ 

SEnS SHrt

  ‘  with  the                  

‘ 

 ‘ icon on.

ATTENTION: In order to optimise battery duration, the 

programmable thermo-hygrostat performs sensor readings 

and error controls every 3 minutes or when ‘Ok’ is pressed and 

consequently, decides on activation or deactivation of the relay.

Any error message must disappear within 3 minutes or on 

pressing the ‘Ok’ key. If the message does not disappear then 

problems have been detected on the sensors.

Comfort and Economy temperatures/humidity adjustment

During normal operation, the display shows the room temperature 

and humidity reading and the icon relative to the current setting mode          

‘   ‘ or ‘   ‘.

The programmable thermo-hygrostat reads the room temperature 

from the internal or external sensor (depending on the setting made in 

the ‘ 

rEG

 ’ parameter), while the humidity is only read on the internal 

sensor.

The flashing ‘ 

 ‘ icon indicates that the adjustment (temperature or 

humidity) takes place on an internal sensor, while the flashing ‘ 

 ‘ 

icon indicates that the adjustment (temperature only) takes place on 

the remote probe.

Activation of the relay that controls the room humidity management 

system is indicated on the display by switch-on of the ‘   ‘ icon.

The activation of the relay that controls the room heating/cooling 

management system is indicated on the display by the switch-on of 

the ‘   ’ icon for heating and the ‘   ’ icon for cooling.
Proceed as follows to adjust:

- Display the actual time.

- Press the ‘   ’ or ‘   ’ key once: the display shows the comfort 

temperature set (distinguished by ‘   ‘ icon) and the ‘ 

SET °C

 ’ icon 

(indicating that the setpoint temperature is being displayed).

- Press the ‘   ’ and ‘   ’ keys to modify the setpoint temperature 

displayed.

- Press the ‘ 

 ‘ key, the display shows the economy temperature 

set (distinguished by the ‘   ‘ icon and the ‘ 

SET °C

 ’ icon (indicating 

that the setpoint temperature is being displayed).

- Press the ‘   ’ and ‘   ’ keys to modify the setpoint temperature 

displayed.

- Press the ‘ 

 ‘ key, the display shows the comfort humidity set 

(distinguished by the ‘   ‘ icon) and the ‘ 

SET %RH

 ’ icon (indicating 

that the setpoint humidity is being displayed).

- Press the ‘   ’ and ‘   ’ keys to modify the setpoint humidity 

displayed.

- Press the ‘ 

 ‘ key, the display shows the economy humidity set 

(distinguished by the ‘   ‘ icon) and the ‘SET %RH’ icon (indicating 

that the setpoint humidity is being displayed).

- Press the ‘   ’ and ‘   ’ keys to modify the setpoint humidity 

displayed.

- Press the ‘   ‘ key or after a few seconds of inactivity, the display 

goes back to showing the room temperature, memorising the values 

set.

Note: Normally, in order to have night -time adjustment, the 

economy temperature/humidity must have a value lower than 

the comfort value.

The programmable thermo-hygrostat will adjust the room temperature 

in comfort or economy mode in agreement with the hourly program set 

(see ‘ USER PARAMETER SETTING ‘ paragraph).

Dew point control

The dew point (managed in the user parameter ‘ 

C-dP

 ’), represents 

the temperature below which condensate forms on the surfaces and 

depends on the temperature and humidity present in the room. 

ATTENTION

- The dew point control is only active if the ‘ C-dp ’ (Dew Point 

control) parameter has been activated.

- The dew point control is only managed in cooling and/or 

dehumidification mode.

- If the conditions listed above are true, on the basis of the dew 

point, the cooler and dehumidifier command will have priority 

with respect to normal adjustment (i.e. with dew point control 

disabled).

The table blow (table 1) shows the dew point value (expressed in °C), 

depending on the room temperature and relative humidity, expressed 

as ‘ 

%RH

 ’.

T.HYGROS

Cod. THW01B

Via del Commercio, 9/11 36065 Mussolente (VI) ITALY
Tel.: +39.0424.567842 - Fax.: +39.0424.567849
http://www.seitron.it - e-mail: [email protected]

Summary of Contents for T.HYGROS THW01B

Page 1: ...ighlighted by a box surrounding the number corresponding to the day of the week 1 Monday 7 Sunday 8 Confirm by pressing OK the output of the time and day setting is automatic Time Temperature Humidity Display By repeatedly pressing the the display can alternately show the actual time the room temperature in C read by the internal sensor distinguished by the icon the room temperature in C read by t...

Page 2: ... button 5 To exit the user parameter settings and resume normal operation press the button or wait 10 seconds without pressing any key OFS2 REMOTE SENSOR OFFSET SETTING With this parameter it is possible to correct the temperature reading of the remote sensor by 5 C in order to correct any systematic reading errors due to the positioning of the remote sensor in areas unsuitable for measuring the r...

Page 3: ... del punto di rugiada impostato nel sottoparametro d EC HYdP dew point hysteresis equal to 0 5 C cannot be modified d FP dew point control on fixed points If the dew point control function C dP is activated on d FP the programmable thermo hygrostat controls the cooling and dehumidification devices on the basis of the comparison of the temperature value of the dew point calculated and the temperatu...

Page 4: ... are lit inside the symbol If the symbol completely empty flashes it means that the batteries are depleted and must be replaced In this case both the relays are placed in the safety position N C and the display alternately shows the time or temperature or humidity and the word BATT If the batteries are not replaced as soon as possible the or symbols will also flash indicating that the device is bl...

Page 5: ...n Fig 1 see paragraph HOW TO INSERT REPLACE THE BATTERIES 6 QUICKGUIDEFORSETTINGTHETIMESCHEDULE Press button P The display shows PrOG with the icon P turned on Press key OK the display shows the word dAY the icon P and the squares corresponding to the flashing days Press buttons and in order to choose one of the four days combinations available as pre set Press button OK to confirm the choice The ...

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