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5

System deactivation by means of magnetic switch

It is also possible to force temperature control exclusion via the use of a magnetic window 
switch connected to the relevant terminals. This helps to avoid wasted energy. The activa-
tion of this mode is indicated on the display by the word 

.

Frost Protection Control

Whenever temperature control on the TA450 is bypassed, either manually or automatically, 
differential FROST protection remains active thus safeguarding both the boiler and the water 
pipes. The FROST PROTECTION temperature is programmable from +3°C to +16°C.

+3°C

–3°C

Temperature measurement calibration

Should the positioning of the TA450 not prove to be ideal (for example when situated close 
to a heat source) temperature measurement can be inaccurate: to overcome this problem 
the reading can be calibrated by +/– 3°C thus optimising comfort and energy consumption.

Thermal differential control

This control system is recommended for installations that are particularly difficult to control 
such as those that experience extreme variations in external temperature. It guarantees 
maximum benefit from the installation with minimum consumption. In order to adapt the 
system to installations that feature differing thermal inertias (convector heaters, underfloor 
heating, electric heaters) the temperature differential can be set between 0°C and 0 9°C

PI

Proportional/Integral Control

Allows for the optimisation of fuel consumption while enjoying the maximum of environ-
mental comfort by reducing the number of times the boiler is ignited as a function of the 
difference between the set temperature and room temperature: the smaller the difference 
between the two temperatures the fewer the number of times the boiler is ignited thus 
leading to a considerable reduction in energy consumption while maintaining a certain 
degree of comfort. The TA450 allows for the selection from among three preset programmes 
depending on the type of system to control (P1, P2 and P3). Alternatively programme P4, 
which is completely manual, can also be selected (See table 1 on page 18).
Integral proportional adjustment has the advantage of permitting the management of a 
wider variety of systems with respect to the setting of the thermal differential. It is especially 
suitable for underfloor and radiant systems. The difference between the set temperature 
and the ambient temperature is just a few tenths of a degree. This allows for more precise 
adjustment.

Temperature Set-point Adjustment Blocking

The TA450 can block the programming of temperature set-points thus avoiding accidental 
changes to settings. Using this feature the user is free to select one of three pre-pro-
grammed levels without the possibility to change them.

Summary of Contents for TA 450

Page 1: ...Digital Thermostat Wall Mounting TA 450 Instruction Manual TA450E 24806660 13 03 13...

Page 2: ...and keep it available for future reference Read Carefully Read the warnings contained herein with care as they furnish important instructions regard ing safe use installation and maintenance After re...

Page 3: ...ERATURE 13 9 OVERALL SYSTEM OPERATING TIME 13 10 TEMPERATURE CONTROL LEVEL PROGRAMMING COMFORT ECO AND NIGHT 14 11 PROGRAMMING THE FROST PROTECTION TEMPERATURE 15 12 TEMPERATURE MEASUREMENT CALIBRATIO...

Page 4: ...and intuitive way three different temperature levels COMFORT ECO and NIGHT which together allow for temperature programmability over the range 3 C to 35 C The TA450 is pre programmed with the followin...

Page 5: ...nderfloor heating electric heaters the temperature differential can be set between 0 C and 0 9 C PI Proportional Integral Control Allows for the optimisation of fuel consumption while enjoying the max...

Page 6: ...temperature COOLING mode active HEATING mode active Battery Status Indicators Battery charge status When this warning indicator appears on the display it means that there is around 1 month left to re...

Page 7: ...ng of operating parameters Operating Modes COOLING HEATING or OFF User profile selection Window switch or remote control mode selection Frost protection temperature setting Display of overall system o...

Page 8: ...be wall mounted as follows Open the unit by pressing button A fig 2 while at the same time pulling in the direc tion of the arrows Remove the terminal block cover fig 3 and fasten the back of the uni...

Page 9: ...to use the NC connection within the instal lation remove the breakable tab that blocks access to the terminal block Loads U1 boiler circulation pump sole noid valve etc U2 motorised valve NOTE For con...

Page 10: ...ng way round could damage the unit If nothing appears on the display within 10 seconds press the reset button R fig 60 Close the unit making sure that the hooks are inserted into the slots fig 12 Once...

Page 11: ...When pressed and held down the numbers on the display will scroll slowly for the first five seconds and then more quickly Press button fig 16 The hour digits flash Press either button or until the co...

Page 12: ...ELECTION Cycle through the operating modes HEATING COOLING and BYPASS by pressing the button The final selection will be verified by the displaying of either the heating cooling or bypass icons fig 21...

Page 13: ...MPERATURE At any moment a temporary temperature setting can be manually set A temporary temperature setting can be set by means of the buttons From this moment on the thermostat will control the heati...

Page 14: ...e word appears on the display signifying COMFORT The required temperature for the COMFORT temperature control level can now be set by means of the or buttons fig 30 the word will disappear from the di...

Page 15: ...g 34 Press the button to exit and save the new temperature to memory Close the cover 12 TEMPERATURE MEASUREMENT CALIBRATION Make sure that the unit is in OFF mode Press button P fig 35 The word will a...

Page 16: ...or the button fig 38 to select Press the P button once again fig 39 The current thermal differential value will appear on the display Press button or fig 40 to modify this value as desired During oper...

Page 17: ...r the button or the button fig 42 to select The proportional inte gral control system is selected Press the P button appears on the display fig 43 Press button or fig 44 so as to select control system...

Page 18: ...P2 and P3 are fixed programmes whereas programme P4 can be complete ly programmed by the user Programme Cycle duration Minimum ON time Proportional Range System type P1 10 minutes 1 minute 1 5 C Base...

Page 19: ...es between 1 and 5 minutes Press button P fig 49 appears on the display Press either the button or the button fig 50 to modify the proportional range between 1 and 3 C Press button P to exit programmi...

Page 20: ...2 Press buttons P and to exit program ming Note After five seconds the display will auto matically exit programming mode Close the cover 16 REMOTE CONTROL In order to enable remote control operation O...

Page 21: ...ons or fig 57 select to disable the remote control input Press button fig 58 Using buttons or fig 59 select to enable the magnetic switch input or to disable it Press button to exit programming Close...

Page 22: ...d reset the unit The TA450 will restart in HEATINGmode or COOLING if reset in this mode and at the COMFORT control level temperature 19 BATTERY REPLACEMENT When the indicator flashes on the dis play i...

Page 23: ...mage the unit There will be approximately 2 minutes available for replacing the batteries To restart the unit proceed as described in chapter 4 Close the unit Make sure that the hooks have been insert...

Page 24: ...ilable contacts 1 NO NC switch contacts Range of adjustment from 3 to 35 C Room temperature measuring interval 15 seconds Reading resolution 0 1 C Displayed reading range from 0 C to 40 C Precision 0...

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