Bpt TH 450 User manual

THERMOPROGRAM
DIGITAL PROGRAMMABLE
THERMOSTAT
TH 450
INSTRUCTIONS FOR USE
TH450
TH450E 24806640 13-03-13

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Congratulations on the purchase of this TH450 pro-
grammable thermostat. For best performance and
to enable the best use of this programmable ther-
mostat's characteristics and functions please read
this manual carefully and keep it available for future
reference.
WARNINGS FOR THE INSTALLER
• Read the warnings contained herein with care as
they furnish important instructions regarding safe
use, installation and maintenance.
• After removing the packaging check the condition of
the unit.
• The system must be installed in compliance with
current safety standards.
• The manufacturer declines all liability for any dam-
age as a result of improper, incorrect or unreasonable
use.
• Should the unit be in need of repair contact only a
technical support centre authorised by the manufac-
turer.
• Failure to comply with the above instructions may
compromise the unit's safety.
THERMOPROGRAM TH450
The TH450 programmable thermostat has been
designed to ensure perfect temperatures any time of
day, any day of the week.
It features a new temperature control system and
new functions.
The TH450 has been designed to adapt itself to all
types of systems featuring different thermal inertias
(convector heaters, radiant underfloor heating, elec-
tric heaters, etc.), it ensures maximum comfort and
savings in any environmental condition.
It is possible to choose between differential control
mode and integral proportional mode (cycles per
hour management). The latter allows the program-
mable thermostat to reduce the time the boiler is in
operation as the room temperature approaches the
desired temperature.

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This provides a greater reduction in energy consump-
tion while at the same time providing the highest
levels of comfort.
The TH450 has new features and functions that
include:
• a backlit display;
• the possibility to set boiler ignition down to the
quarter-hour;
• a new AUTOMATIC ADVANCE function that allows
the TH450 to self-learn the periodicity required to
achieve the desired temperature at any chosen point
in time;
• an option to calibrate the measured room temper-
ature;
• the use of a GSM relay interface which makes it
possible to remotely activate a manual or timer
controlled programme thus ensuring a welcoming
return home.
Wall mounting the installation takes only minutes.
The thermostat can be connected to the heating/
cooling installation simply by means of two wires.
Three LR03 1.5V penlight AAA alkaline batteries
are used to power the TH450 for over a year. Once
installed the unit is ready to operate based upon
on its standard pre-define programme residing in
memory. Based on actual needs, this programme
can be modified as required by setting the desired
temperatures for different times of the day and week.
The TH450 can be programmed with great ease, even
before it is installed. The ample backlit display makes
this easier, because at any time it permits the viewing
of all data and set programmes which can subse-
quently be changed as required.
Pressing the programming buttons causes the display
to light up for about 15 seconds from the last time
any key was pressed. The temperature differential can
be programmed from 0°C to 0.9°C.
The TH450 can control both heating and air-condi-
tioning systems, and can be installed as a replace-
ment for a previous on/off programmable thermostat.

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The temperature differential can be
set between 0°C and 0.9°C
Suitable for systems with differing thermal
inertias (convector heaters, underfloor
heating, electric heaters) thus ensuring
best system use with the lowest possible
consumption.
Proportional/integral adjustment
programme
Allows for energy consumption optimisa-
tion with maximum room comfort thus
reducing boiler operating times based
on the difference between the set tem-
perature and the room temperature. The
smaller the difference between these
temperatures the shorter the boiler igni-
tion time will be compared to previously.
AUTOMATIC ADVANCE function
The TH450 self-adjusts so as to provide the
desired temperature at the pre-selected
time.
Boiler ignition and shutdown setting
with 15 minute precision
In automatic operating mode the TH450
can ignite or shutdown the boiler on the
half or quarter of each hour, thus allowing
for more precise management of room
comfort programmes while at the same
time substantially optimising boiler ener-
gy consumption.
Temperature measurement calibration
If the TH450 is not properly situated (e.g.
installed near a heat source), temperature
measurement may be incorrect or may
not correspond to the actual temperature.
To solve this problem, it is possible to
calibrate the reading to within ±3°C and
in so doing optimise comfort and con-
sumption.

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Easy and complete daily and weekly
3-level programming
With the TH450, temperatures for any
time of any day of the week can be
programmed in a simple and intuitive
manner. Just a few buttons are used to set
the hourly temperature while at the same
time providing constant on-screen moni-
toring of programming progress.

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TH450
4
2
1
3
8
7
6
51011 13
14
15
16
17 18
12
9
22
2324
2627 25 21
19
20
28
Fig. 1

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EXTERNAL CONTROLS AND SYMBOLS (see fig. 1)
ATTENTION. To turn on the backlight simply press
any button. To enter one of the selected functions
(e.g. setting the clock, etc.) the appropriate button
will need to be pressed twice. The backlight stays
on for 15 seconds after the last press of a button.
INFORMATION DISPLAYED
10 ÷ 23
Program display for the hours.
The flashing cursor indicates the hour
corresponding to the clock time.
2Temperature range T1.
3Temperature range T2.
4Temperature range T3.
5Button for selecting MANUAL or
AUTOMATIC mode.
6
ALL-PURPOSE or MANUAL TIMER-
CONTROLLED programme activation
button.
7 1÷7 Days of the week.
8Battery charge status.
9Digital clock.
10 System bypass.
11 Activation of the all-purpose pro-
gramme mode.
12 On-off time delays.
13 Manual operating mode.
14 Remote activation.
15 Frost protection.
16
COOLING programme.
When the cooling system is in opera-
tion this icon is animated.
17
HEATING programme.
When the heating system is in opera-
tion this icon is animated.
18 Button to increase temperature,
time, etc.

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19 Button to decrease temperature,
time, etc.
20 Digital thermometer.
21 C Copy programme.
22 1÷7 Day Selection.
23 0÷23 Decrease or increase of the hour
within the ‘Daily’ programme display.
24 HEATING ( ), COOLING ( ) or OFF
programme selection.
25 P
Temperature programming in the
three ranges T1, T2, T3. Setting of
operating parameters.
26 Setting of the clock and of the on/
off delay time.
27 R Reset.
28 When this warning appears, it means
that the batteries are low .

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CONTENTS
1 - INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . .Page 11
2- ELECTRICAL CONNECTIONS. . . . . . . . . . . . . .Page 12
3 - POWER SUPPLY. . . . . . . . . . . . . . . . . . . . . . . . .Page 14
4- SETTING THE CLOCK. . . . . . . . . . . . . . . . . . . . .Page 15
6 - PRE-MEMORISED PROGRAMMES. . . . . . . . .Page 18
6.1 - Heating programme . . . . . . . . . . . . . . . . 18
6.2 - Cooling programme . . . . . . . . . . . . . . . . 19
7 - CUSTOMISATION OF THE
DAILY TEMPERATURE PROGRAMME .........Page 20
8 - CUSTOMISATION OF THE
TEMPERATURE LEVELS FOR
THE HEATING PROGRAMME. . . . . . . . . . . . . . . .Page 23
9 - CUSTOMISATION OF THE
TEMPERATURE LEVELS FOR
THE COOLING PROGRAMME. . . . . . . . . . . . . . . .Page 25
10 - ALL-PURPOSE PROGRAMME. . . . . . . . . . . .Page 25
11 - MANUAL OPERATION ..................Page 27
12 - SYSTEM BYPASS .......................Page 28
13 - FROST PROTECTION FUNCTION. . . . . . . .Page 29
14 - TIMED MANUAL PROGRAM. . . . . . . . . . . . .Page 31
15 - SETTING OF SYSTEM ON-OFF
TIME DELAYS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 33
16 - TEMPERATURE MEASUREMENT
CALIBRATION .............................Page 35
17 - AUTOMATIC ADVANCE . . . . . . . . . . . . . . . . .Page 36
18 - THERMAL DIFFERENTIAL ...............Page 37
19 - PROPORTIONAL-INTEGRAL
PROGRAMMING ...........................Page 39
20 - SYSTEM OPERATING TIME ..............Page 43
21 - REMOTE CONTROL ....................Page 44
22 - RESET. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 48
23 - BATTERY REPLACEMENT ...............Page 50
24 - COVER REPLACEMENT . . . . . . . . . . . . . . . . .Page 52
25 - TECHNICAL FEATURES .................Page 54

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1  INSTALLATION
Install the unit in a position which is suitable for cor-
rect room temperature measurement for example on
an internal wall. Avoid installation in niches, behind
doors or curtains, or near heat sources
The TH450 is to be wall mounted as follows:
• Open the unit by pressing button A (fig. 2) while at
the same time pulling in the direction of the arrows.
Remove the terminal cover (fig. 3) and using the
screws and expansion plugs supplied (fig. 5.6) fasten
the back of the unit either to the wall (fig. 4) or within
the recessed box.
ATTENTION. For the unit to work properly, we recom-
mend that it be mounted on a flat surface. Be careful
not to tighten the screws excessively.
A
Fig. 2 Fig. 3

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2 ELECTRICAL CONNECTIONS
Wiring will depend on the type of equipment to be
controlled by the programmable thermostat: refer to
the diagram in fig. 7, 8 or 9.
KEY
Mains power supply wires
N= neutral
L= phase
Fig. 4
Fig. 5
Fig. 6

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L
N
NC NA
C
12
U2
LOAD
M
CLOSED
OPEN
Relay contacts
C= common
NO = normally open contact
NC =normally closed contact
Remote control inputs
1input
2input
Loads
U1 = boiler, circulation pump, solenoid valve, etc.
U2 = motorised valve
L
N
NC NA
C
12
U1
LOAD
L
N
NC NA
C
12
Fig. 9Fig. 7
Fig. 8

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NOTE. For connection details, refer to the technical
documentation of the device to be controlled.
3  POWER SUPPLY
Insert three alkaline LR03 size AAA 1.5V batteries
within the housing. Pay attention to polarity as shown
on the bottom of the housing (fig. 10).
ATTENTION. Inserting the batteries the wrong way
round could damage the unit.
Use only ALKALINE batteries
If nothing appears on the display within 10 seconds
press the reset button R (fig. 82).
Close the unit making sure that the hooks are inserted
into the slots (fig. 11).
Once the batteries have been inserted the display
comes on featuring the symbols illustrated in fig. 12
The unit is now set to operate in automatic mode and
with the heating programme activated ( ).
The room temperature reading and battery status
indicators now appear.
Fig. 10 Fig. 11

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4 SETTING THE CLOCK
4.1- Open the cover.
4.2- Press button twice (fig.13).
The first press of the button simply activates the
backlight.
The minutes digits flash.
4.3- Press button or until the correct value for
the minutes is reached(fig. 14).
4.4- Press button (fig. 15).
The hour digits flash.
TH450
Fig. 12
TH450
TH450
Fig. 13
Fig. 14

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4.5- Press either button or until the correct
value for the hour is reached (fig. 16).
4.6- Press button (fig. 17).
The indicator for the days of the week flashes.
4.7- Press either button or until the display
shows the current day (fig. 18).
4.8- Press button to end the procedure for setting
the time and day (fig. 19).
The colon between the hours and minutes flashes to
confirm the operation is complete.
TH450
TH450
TH450
Fig. 15
Fig. 16
Fig. 17

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If no button is pressed for 15 seconds, the unit auto-
matically exits this procedure, saving the last data
values.
4.9- Close the cover.
Note. Each time buttons or are pressed the
numbers on the display decrease or increase by one.
When pressed and held down the numbers on the
display will scroll slowly for the first five seconds, and
then more quickly.
TH450
TH450
TH450
Fig. 18
Fig. 19
Fig. 20

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5  PROGRAMME FOR HEATING,
COOLING AND SYSTEM OFF
Press button once to activate the cooling pro-
gramme (fig. 20) or twice to turn the system OFF (fig. 21).
When the icon is on, it confirms that the TH450
control of the system has been bypassed.
For 5 seconds the room temperature reading disappears
to be replaced by .
Press button again to restore the heating
programme.
6  PREMEMORISED PROGRAMMES
6.1 - Heating programme
For easier use a heating programme has been mem-
orised within the TH450 with the temperature trend
shown in figure 22 from Monday to Friday (1÷5) and
in figure 23 for Saturday and Sunday (6 and 7), where
the fixed temperature levels are:
Range T1 16°C
Range T2 18°C
Range T3 20°C
TH450
TH450
Fig.21 Fig. 22

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6.2 - Cooling programme
The memorised cooling programme includes the
temperature trend shown in figure 24, where the
fixed temperature levels are:
Range T1 24 °C
Range T2 26 °C
Range T3 28°C
TH450
Once satisfied with the memorised programmes, the
TH450 will not require any further intervention and will
be ready for immediate use.
For the creation of customised programmes, refer to
chapters 7, 8 and 9.
TH450
Fig. 23 Fig. 24

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7  CUSTOMISATION OF THE DAILY
TEMPERATURE PROGRAMME
7.1- Open the cover.
7.2- Use button 1÷7 to place the day indicator in
position 1 (Monday) (fig. 25).
The parentheses for the selected day flash.
7.3- Use buttons 0÷23 to move the flashing indi-
cator to hour 0 on the graph of the ‘Daily’ pro-
gramme (fig. 26).
TH450
Note. When this button is used, the information on the
display changes as follows:
a) The clock shows the hour indicated by the flashing
segment . The colon between the hours and min-
utes does not flash.
b) The temperature shown is the value for the selected
level at the time indicated by the flashing segment.
7.4 - Use button or (fig. 27) to select the desired
temperature range.
TH450
Fig. 25 Fig. 26