Intiel DT 3.4 User manual
PROGRAMMABLE DIFFERENTIAL THERMOSTAT
DT 3.4
USER MANUAL
Pomorie
Major Kolontaevski 10
Str.
tel. 0596/33366 fax: 0596/32580
www.intiel.com e-mail: [email protected]
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TECHNICAL DESCRIPTION
1. Application
Differential thermostat is integrated in systems for preparing domestic hot water
into boilers, heated by combination by boiler, solar panels and electric heaters. Designed
to manage the work of two circulation pumps installed in:
- Water circuit between the panels and serpentine the boiler;
- Water circuit between the boiler and the second serpentine of the boiler.
In this way regulate heat exchange therebetween.
It is possible to include a third pump to regulate the heat exchange between the
solar panels and a second tank (buffer tank or pool).
2. Operation
The thermostat has four temperature sensors mounted respectively in the heater,
solar panels and boiler. The process works with the following parameters:
2.1 dT1, Δt1- set and actual temperature difference between the panel and the
boiler. dT1 can be set within the range of 2 to 20 °C. The default setting is 10 °C;
2.2 dT2, Δt2- set and actual temperature difference between the boiler and the
heater. dT2 can be set within the range of 2 to 20 °C. The default setting is 10 °C;
2.3 Tbset - set temperature in the heater to which it could reasonably be heated by
solar panels, boiler, electric heaters. Set in the range of 25 to 80 °C. The default setting
is 60 °C;
2.4 Tbmax - critical maximum temperature in the heater. Set in the range from 80
to 100 ° C. The default setting is 95 °C;
2.5 Tbmin - minimum water tank temperature below which the defrost is terminated
on the panel. Do not set. The default setting is 20 °C;
2.6 Tpmin - minimum temperature of the solar panel. Set in the range from 20 to
50°C. The default setting is 40 °C;
2.7 Tpmax - maximum permissible temperature of the solar panel. Set in the range
from 80 to 110°C. The default setting is 105 °C;
2.8 Tpdef - defrosting temperature of the solar panel. Set in the range from -20 to
10 °C. Default without defrosting - -;
2.9 Tkset - boiler water temperature at which the pump 2 will turn without
monitoring differential (only if the corresponding option is selected). Set in the range from
30 to 90 °C. The default setting is 60 °C;
2.10 Tkmin - minimum boiler water temperature. Set in the range from 20 to 50
°C. The default setting is 40 °C;
2.11 Tkmax - maximum boiler water temperature. Set in the range from 80 to 100
°C. The default setting is 95 °C;
2.12 Tkdef - temperature of the boiler water, under which is turn a pump 2
continuously the purpose to prevent freezing of the water in the pipes. Do not set.
The default setting is 10 °C;
3
2.13 Tbuff - Set temperature to a second tank (buffer tank or pool) It is used only
when it is selected Heaters Opt.3 (see point 4.2). Set in the range of 25 to 80°C. Default
40 °C.2.14 Thdef - temperature of the boiler water, under which is turn a electical heaters.
Set in the range from 20 to 80 °C. The default setting is 10 °C;
- When any of the temperatures higher than +120° C and is not connected temperature
sensor of the display shows "hi"
- When one of the temperatures is lower than -20 °C or has a bridged temperature sensor
is displayed on the display "low"
The operation of the thermostat is defined according to the status of the sensors as follows:
А)Normal modes
Conditions defining the operation of pump 1:
- At a temperature in the lower part of tank Tb1lower than the set Tbset and positive
difference Δt1between the temperature Tp of the panel and the bottom heater, more than
the set dT1by 2 °C, is turn a pump 1 is carried heating of heater from the panel. If in
the process of heating the boiler Δt1equals the set dT1, turns off pump 1 (relay output 1)
- The heating is done until the temperature at the bottom of the tank Tb1equals with set
Tbset, then the pump is switched off;
- If the above conditions of the panel temperature drops below Tpmin, the pump operation
is prohibited, however, that there may be Δt1> dT1+2 °C and Tb1<Tbset;
- If the temperature of the solar panel drops below Tpdef, pump 1 turn on enforcement,
although it was off because of temperatures below Tpmin (only if option enabled for
defrosting);
- If the previous regime tank temperature drops under Tbmin, the pump turns off, as is
terminated defrost panel.
When the water tank temperature Tb1 is above the assigned Tbset and in the same time is
grеater than the solar panel temperature, in terms of preventing water tank overheating the
circulation pump will be switched on. Its operation goes on until the water tank
temperature Tb1 is being decreased to the assigned one Tbset. In this case the water tank
gives the excessive heat, as it cool itself through the solar panel.
Conditions defining the pump 2 operation:
- At a temperature in the lower part of tank Tb2lower than the setpoint and a positive
difference Δt2between the temperature Tkof the boiler and the upper part of the heater,
more than the set dT2by 2 °C, turn on a pump 2 and is carried to the heating heater from
the boiler. If in the process of heating the heater Δt2declining, after Δt2align the set dT2
turn off the pump (relay output 2);
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- The heating is done until the temperature at the top of the tank Tb2equals with setpoint
Tbset, then the pump is switched off;
- If the above conditions, the boiler drops below Tkmin, the pump operation is turn off,
however, that there may be ∆t2>dТ2+2° C and Тb2<Tbset;
- If the boiler temperature drops below Tkdef, pump 2 is force, although it has been
turned off because of temperatures below Tkmin.
- In systems with buffer tank, pump 2 operation is controlled by Tb1!
Conditions determining the operation of electric heaters on the tank:
- If the temperature at the top part of tank Tb2is lower than the set Thset-h.syst is
allowed heating by electric heaters (relay output 3). Does this happen when there are no
conditions for the pumps and heaters to work independent of the pump, select the option
"Heaters" in the menu (see section 4.2).
Conditions determining the operation of pump 3:
- With option Heaters Opt.3 (see section 4.2), the controller is configured to work with a
third pump that is connected to the relay output 3 instead of electric heaters and Tb2
sensor is mounted in the second tank
- At a temperature Tb2in the second heater below the setpoint Tbuff and panel
temperature Tp, as well as a positive difference Δt3between the temperature Tp of the
panel and the second heater, larger than the set dT1by 2 °C, turn on a pump 3 . But only
in cases where there is no running pump 1;
- Heating is performed while the temperature Tb2equals the set Tbuff, then the pump is
switched off;
- If the conditions for their turn on of pump 1, work pump 3 is terminated.
In this way the heating of the first heater is given priority.
B) Alarm Modes
- If in the process of heating the heater, the temperature of the panel exceeds Tpmax,
pump 1(and the pump 3 if used) will be forced the purpose cool the panels. This is done
despite the temperature at the bottom of the tank Tb1can exceed Tbset.
- If in the process of heating the heater, the temperature of the boiler exceeds Tkmax,
pump 2 (and the pump 3 if used ) is force for cooling of the boiler. This is done despite the
temperature at the bottom of the tank Tb1can exceed Tbset.
- If, at the above conditions temperature in the lower or upper part of the heater reaches
the critical maximum value Tbmax, pump 1 is turned off, although this may result to
overheating of the panel. In this way the temperature in the boiler has a higher priority to
the temperature of the panel.
In this case operation of the pump 2 also terminate.
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When using a third pump, it is switched off when the temperature of the water in the
buffer vessel reaches Tbmax.
3. Front panel
On the front panel are the control elements and programming. These are graphical
LCD display, LED display and three buttons - button up, button down and button "SET".
Appearance of the front panel is shown in Figure 1.
3.1 Graphic LCD display with a resolution of 128x64 pixels (1) - provides information
on the current temperature measured by the sensors Figure 1.1a, state information system
shown by icons fig.1.1b (see Table 3) Ability to adjust the controller by user menu
fig.1.1c;
Figure 1.1a
3.2 LED (2) - indicates abnormal conditions;
3.3 Buttons (3) - buttons to adjust the controller.
Фиг.1
Figure.1
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4. Programming
After power supply the thermostat automatically established reset, which shows the
temperature the tank, solar panel and boiler and system status by icons.
4.1 Enter the menu of the controller
By
pressing
and
holding
the
"SET"
button
for
more
than
3
seconds.
With
the
up
and
down
to
navigate
forwards
and
backwards
in
the
menu.
Change
the
selected item
by pressing
of a button
SET.
A
when the
value
is changed
after
pressing the
button
SET
value
start flashing,
changing it
is done
by pressing
up
or down.
Confirm
the
selected value
-
again
with
SET.
4.2
Options
-
Vacation.
On and off
mode
"Vacation."
Mode
is designed
for
cases where
tank
is not
used
for a long time.
When activated,
the temperature
of the water heater
is
set at
40 ° C
and the inclusion
of electric
heaters
is
terminate.
Pump 1
turns
as necessary
in order
avoid
overheating
the water heater
or
the panel.
This mode
does not affect
the operation of the
pump
3, where the
controller
is used
with the
selected option
-
Heaters Opt.3;
-
Pump
2
ON.
With
option
dT2,
management
of
pump
2
becomes
differential
temperature
between
the
water
heater
and
the
boiler.
With
option
Tkset,
pump
2
turns
following an assigned
temperature,
without monitoring
the differential
difference;
-
Heaters.
When
selected,
Opt.1,
electric
heaters
switch
when
no
pump
running
for
more than 15
minutes and
compliance with the conditions
of
point 2.
When
selected,
Opt.2
heaters
shall
switch
on
independently
of
whether
they
have
turned
a pump, as long as
the conditions
specified in
point 2.
When
selected
Opt.3
electric
heaters
are
not
used.
In
this
case
Tb2
sensor
can
be
mounted
in the second
boiler,
buffer tank
or
pool and
to
relay output
3
to
include a third
pump to
the solar system;
-
h. hyst.
Temperature
hysteresis for switchig electric heaters.
-
Freez Def.
Enables or disables
the function
for defrosting
the panel;
-
Default data.
Returns
the default
set
of
manufacturer;
-
Save & Exit.
Save Settings
from the menu.
When
not
changed
settings
is done only
output
from the menu.
If
a period of
15
sec.
no buttons are pressed, it should
automatically
exit the menu,
as
the
changes
are not saved
in memory.
In this case they
will be valid
until it is
stopped
power.
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5. Electrical connection
Electrical connection involves connection of sensors, mains power pumps and
electrical heaters, according to Figure 2. The sensors are a type Pt1000 .
If necessary connecting cables of the sensors can be prolonged.
Recommended length that does not affect the measurement is to 100m.
Terminals 16, 17 are input to the sensor in the solar panel.
Terminals 18, 19 are input to the sensor at the bottom of the water tank.
Terminals 20, 21 are input to the sensor on top of the water tank or secand water tank or
swimming pool.
Terminals 22, 23 are input to the sensor in the boiler.
Terminals 1 ÷ 4, 5 ÷ 8 and 9 shall be conected accordingly protective ground zero phase
power supply.
At terminals 10, 12 and 14 are respectively connected to pump 1, pump 2 and the
electrical heaters, which starting phase (L1, L2 and L3). At terminals 11, 13 and 15 out
phase (L1, L2 and L3), when terminals 10, 12 and 14 not out and vice versa.
6. Hydraulic connection
Example of a system with one heater, system with 2 tank (buffer tank, swimming
pool). Heated by solar panels, boiler and electrical heaters.
A) Heatingt water tank with boiler, solar panels and electric heaters. With a common
pump tank and heating.
Фиг.3
Figure 2
2222
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PT - working heater thermostat
BT - block heater thermostat
B) With two pumps for water tank and heating. Rather than pump 2 can be installed
solenoid valve or a two-way valve with motor actuator:
PT - working heater thermostat
BT - block heater thermostat
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C) Heating a second heating boiler, electric instead electric heaters mounted a third
pump:
7. Technical data
Rated supply voltage ~ 230V/50-60Hz
Rated current commutated 7A / ~ 250V / 50-60Hz
Number of output contacts three switching
Differential temperature 2 ° - 20 ° C
Sensors: Pt1000 (-50 ° to +250 ° C)
Current through the sensor 2,6 mA
Measuring range -20 ° to +120 ° C
Indication graphical LCD display
Measurement unit 1 ° C
Humidity 0 - 80%
Level of Protection IP 20
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Table 1 P A R A M E T E R S
indication on
the display
description range default setting the user
setting
dT1Setpoint the temperature
difference between the panel
and the water tank. 2 ÷ 20°С 10° С
dT2Setpoint the temperature
difference between the boiler
and the water tank. 2 ÷ 20°С 10° С
Tbset
Setpoint water tank temperature
to which it can normally be
heated by solar panels and
boiler
25 ÷ 90° С60° С
Тbmax Critical maximum temperature
in the heater. A lso for the
buffer, if used. 80 ÷ 100°С 95° С
Tbmin
Minimum water tank
temperature below which the
defrost is terminated on the
panel.
not set 20° С
Трmax Maximum temperature of the
solar panel. 80 ÷ 110°С 105° С
Трmin Minimum temperature of the
solar panel. 20 ÷ 50° С 40° С
Тpdef Temperature at which defrost
allows the solar panel. -20 ÷ 10°С --
Тkset Setpoint boiler water
temperature to which is
operated pump 2 30 ÷ 90°С 60° С
Тkmax Maximum boiler water
temperature 80 ÷ 100°С 95° С
Тkmin Minimum boiler water
temperature 20 ÷ 50° С 40° С
Тkdef Protective boiler temperature
below which turn on a pump 2 not set 10° С
Tbuff Setpoint temperature for the
buffer or pool (only used when
- Heaters Opt.3) 25 ÷ 90° С 40° С
Thset Setpoint water tank temperature
below which the heaters are
enabled 20 ÷ 80° С 40° С
h.hyst.Temperature hysteresis for
switchig electric heaters 2 ÷ 10° С 3° С
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Table 2
O P T I O N S
indication on the
display
description
default
setting
the user
setting
Vacation
Mode "Vacation."
OFF
Pump 2 ON
The turn on of the pump 2 will be
made by:
dT2 - differential;
Tkset - set boiler water
temperature.
dT2
Heaters Opt.
1) electric heaters turn on when
the pumps are not working;
2) are turn on regardless of
pumps;
3) Opt3-heaters are not used, the
output is used for the third pump.
Opt.1
Freez Def.
Frost protection of solar panels
OFF
Table 3
I C O N S
image
description
Function antifreeze is activated
Overheating of the solar panel
The temperature in the tank is above
the maximum
Temperature in the boiler is above the
maximum
The temperature in the boiler is
below 10 ° C
turned electric heaters
turned Pump 1
turned Pump 2
turned Pump 3
no Pump 3 is ised
Notes:________________________________________________________
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7. Warranty
The warranty period is 24 months following the purchase date of the unit or its
installation by a qualified staff, but not exceeding 28 months after the production date.
The warranty is extended to the malfunctions that occur during the warranty period and
are result of the production reasons or defective used parts.
The warranty does not relate to malfunctions corresponding to not-qualified
installation, activities directed to the product body interference, not regular storage or
transport.
The repairs during the warranty period can be done after correct filling of the
manufacturer warranty card
Warranty Card
Manufacturer: INTIEL
Product type:
Programmable differential thermostat DT -3.4
Production number:
Production date:
29.01.2016
Dealer’s confirmation
Purchase date:
Invoice number:
Dealer’s name,
address and stamp:
Seller’s name and signature:
Installation date
Date:
Company (address, stamp):
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