CTC Union EcoLogic L Manual

Providing sustainable energy solutions worldwide
162 505 61-2 2021-02-25
Important!
• Read carefully before use, keep for future reference.
• Translation of the original instructions.
Installation and Maintenance Manual
CTCEcoLogic L/M

162 505 61-2 2021-02-25
Installation and Maintenance Manual
CTCEcoLogic L/M

4CTC EcoLogic M/L
Table of Contents
Important to remember! ______________________________________________ 6
Safety instructions _______________________________________________________ 7
1. Design and function of CTCEcoLogic _______________ 8
1.1 Main components ______________________________________________8
1.2 Scope of delivery _______________________________________________9
1.3 Heating circuit__________________________________________________10
1.4 DHW ______________________________________________________________13
1.5 Additional heat_________________________________________________14
1.6 Solar panels* ___________________________________________________15
1.7 Recharging bedrock/ground* ____________________________16
1.8 Cooling*__________________________________________________________17
1.9 Pool* ______________________________________________________________17
1.10 Active cooling*_________________________________________________18
2. The house heating curve____________________________________ 21
3. Technical data _____________________________________________________ 25
4. Detailed menu descriptions _______________________________ 26
4.1 Start menu ______________________________________________________26
4.2 Installation wizard_____________________________________________27
4.3 Heating/Cooling_______________________________________________ 28
4.4 DHW ______________________________________________________________31
4.5 Ventilation _______________________________________________________32
4.6 Weekly program_______________________________________________33
4.7 Operation data_________________________________________________ 35
Installer ___________________________________________________________________49
4.8 Display____________________________________________________________49
4.9 Settings __________________________________________________________51
4.10 Define _____________________________________________________________76
4.11 Service____________________________________________________________93
5. Parameter list ______________________________________________________ 99
6. Operation and Maintenance ____________________________ 101
7. Troubleshooting/
Appropriate measures ______________________________________ 102
7.1 Information messages ____________________________________ 104
7.2 Alarm messages ____________________________________________ 105
8. Pipe installation_________________________________________________ 108
8.1 System Type 1*______________________________________________ 108
8.2 System Types 2 and 3* ___________________________________ 113
8.3 System Types 4 and 5* ___________________________________ 120
8.4 System Type 6*______________________________________________ 128
9. Valves _________________________________________________________________ 135
9.1 Three-way mixing valve___________________________________ 136
9.2 Diverting valves______________________________________________ 137
9.3 Bivalent mixing valve ______________________________________ 138
10. Electrical installation_________________________________________ 139
10.1 High voltage __________________________________________________ 139
10.2 Communication between EcoLogic and EcoAir/
EcoPart_________________________________________________________ 140
10.3 Protection – low voltage (sensor)______________________ 147
11. Wiring diagram __________________________________________________ 151
11.1 Relay card_____________________________________________________ 151
11.2 Expansion card______________________________________________ 152
11.3 Parts list________________________________________________________ 153
11.4 Resistances for sensors__________________________________ 155
12. Installation Communication _____________________________ 156
12.1 CTC Remote - Screen Mirroring_______________________ 157
12.2 MyUplink - App______________________________________________ 157
13. First start____________________________________________________________ 158

5CTC EcoLogic M/L
You have just purchased a CTC EcoLogic, with which
we hope you will be very pleased. Read about how you
can take care of your CTC EcoLogic on the following
pages. One part contains general information for the
property owner etc. and one part has been written for
the installer. Save this manual containing the installation
and maintenance instructions. You will be able to enjoy
the benefits of your CTCEcoLogic for many years, and
this manual provides all the information you will need.
CTC EcoLogic is available in two different designs,
EcoLogic L and EcoLogic M. EcoLogic L has
more features (marked with * in the Installation and
Maintenance Manual) than Ecologic M. EcoLogic M
can easily be upgraded to EcoLogic L by installing an
extension card.
The Complete System
CTC EcoLogic is a complete heat pump able to meet
your home’s heating and hot water requirements. It is
equipped with a unique control system that monitors
and controls your entire heating circuit regardless of how
you choose to tailor it.
Congratulations on buying your new
product!
CTC EcoLogic has a control system that:
• monitors all DHW and heating circuit functions;
• monitors and controls your heat pump, solar
panels*, additional heat, buffer tank, pool*, etc.;
• allows for individual settings;
• indicates desired values, for instance,
temperatures and energy consumption;
• facilitates settings in a simple and structured
manner.
Service-friendly, second to none
Easily accessible electrical components, along with
effective troubleshooting functions in the control
program, make the CTC EcoLogic easy to service. It
is supplied with a room sensor as standard, which is
equipped with LED lights that flash in the event of a
fault. CTC EcoLogic is fully equipped to work with the
CTC EcoAir outdoor air heat pump, the CTC EcoPart
ground source heat pump, solar panels* and an external
boiler where present. CTC EcoLogic can control a
number of combinations to give you an extremely
flexible, eco-friendly and energy-saving heating system.
* Only applies to CTCEcoLogic L.

6CTC EcoLogic M/L
Important to remember!
Check the following points at the time of delivery and installation:
• Remove the packaging and check that the product (electrical
connection box and display) has not been damaged in transit. Report
any transport damage directly to the carrier.
• Check for missing parts.
• The product must not be installed where the ambient temperature is
higher than 60°C.
• CTCEcoAir510M230 V1N~ must have software version HP control
card 20160401 or later.
• CTCEcoAir520M must have software version HP control card
20160401 or later.
• To control CTC EcoPart 600M, CTC EcoLogic must have software
version 20190620 or later.
• Register your product for warranty and insurance purposes on our
website:
https://www.ctc-heating.com/customer-service#warranty-registration
No liability is accepted for any misprints. We reserve the right to make design changes.
For your own reference
Fill in the information below. It may come in useful if anything should happen.
Product: Serial number:
Installer: Name:
Date: Tel. no.:
Electrical installer: Name:
Date: Tel. no.:
!
If these instructions
are not followed
during the installation,
operation and
maintenance of the
system, Enertech’s
liability under the
applicable warranty
terms is not binding.
!Information in
this type of box
[!] is particularly
important for
correctly installing
and using the
product.
iInformation in this
type of box [i] is
intended to help
ensure that the
product functions
optimally.

7CTC EcoLogic M/L
Turn off the power with an omnipolar switch before doing any work on the product.
The product must be connected to protective earth.
The product is classified as IPX1. The product must not be rinsed with water.
When handling the product with a hoist ring or similar device, make sure that the
lifting equipment, eyebolts and other parts are not damaged. Never stand under the
hoisted product.
Never jeopardise safety by removing bolted covers, hoods or similar.
Any work on the product’s cooling system should be carried out by authorised
personnel only.
The product’s electrical systems should only be installed and serviced by a qualified
electrician.
-If the supply cord is damaged, it must be replaced by the manufacturer, its service
agent or similarly qualified persons in order to avoid a hazard.
Safety valve check:
-Safety valve for boiler/system to be checked regularly.
The product must not be started if it is not filled with water; instructions are in the
“Pipe installation” section.
WARNING: Do not switch on the product if there is a possibility that the water in the
heater is frozen.
This device can be used by children from the age of eight years and above and by
people with reduced physical, sensory or mental ability or lack of experience or
knowledge if they have been taught, either with supervision or with the instructions
provided, how to use the device safely and understand the risks involved. Children
should not play with the device. Cleaning and maintenance should not be carried
out by children without supervision.
If these instructions are not followed when installing, operating and maintaining the
system, Enertech’s commitment under the applicable warranty terms is not binding.
Safety instructions

8CTC EcoLogic M/L
BJ
C
D
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E
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B
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GHI
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1. Design and function of CTCEcoLogic
This chapter describes the main components as well as the subsystems, which, in
different configurations, form part of the six main systems (System Types 1 to 6). For
more information about System Types 1 to 6, refer to the "Pipe Installation" chapter.
1.1 Main components
1.1.1 Printed circuit board (PCB)
The images below show important components when connecting the CTC EcoLogic.
* Supplied with CTC EcoLogic L.
Accessory pack available for CTC
EcoLogic M.
A Circuit board power supply
B Connection 230 V
C Terminal block, low voltage
D Communication display unit
relay/extension card
E Communication, heat pump
F USB port
G BMS connection
H Network connection (Ethernet)
I Display unit power supply/
internal communication
J Network connection (supplied wire L)
Circuit board A (A2) Extension card (A3)*
1.1.2 Display unit

9CTC EcoLogic M/L
M
P
O
N
L
K
1.2 Scope of delivery
The figure below shows the main components in the EcoLogic delivery.
K Base unit
L Electrical connection box communication cable – display unit
M Display unit
N Room sensor
O Outdoor sensor
P 3 x Primary flow sensors (22k)

10 CTC EcoLogic M/L
1.3 Heating circuit
CTC EcoLogic can control up to four heating circuits using room sensors –
for example, two radiator circuits and two floor heating circuits.
The required curve inclination and adjustment is set when operating outdoor
sensors only. This value is different from home to home and should be
adjusted to suit your needs.
A room sensor that is correctly positioned provides more comfort and
more heating circuit savings. The room sensor picks up the current indoor
temperature and adjusts the heat, for example when it is windy outside and
the house is losing heat, which the outdoor sensor is unable to register.
During solar insolation, or other instances when heat builds inside the
house, the room sensor can also reduce the heat supplied, thus saving
energy. Another way to save energy is to use the night reduction function,
which reduces the indoor house temperature at certain times or periods, for
example during the night or when you are away on holiday.
Degree minutes, System Types 1-3
For System Types 1, 2 and 3 (see the schematic diagrams for System Types
1 to 6 in the "Pipe installation" chapter), the control system measures the
temperature in the heating circuit each minute. Once a certain cumulative
heat loss (measured in degree minutes) is measured, the heat pump is
started up to compensate for the loss.
“Degree minutes” refers to the product of the cumulative heat loss in degrees
(°C) and the time measured for this in minutes. For example, 60 degree
minutes may arise if a total of one degree of heat loss accumulates for one
hour, or three degrees of cumulative heat loss is measured after 20 minutes.
The first heat pump starts when heat loss reaches 60 degree minutes
(factory setting) and stops when the system has recovered the loss (at 0
degree minutes). If several heat pumps are connected at the same time as
the heat loss increases, heat pump 2 starts when there is a loss of 90 degree
minutes (the factory-set difference between the heat pumps is 30 degree
minutes). If additional heat is needed, this is added when there is a heat loss
of 500 degree minutes and stops at 400 degree minutes (both values are
factory set).
Heating circuit 1
Heating circuit 2
Heating circuit 4
Heating circuit 3
*Only applies CTCEcoLogic L. CTC
EcoLogic M can control up to two
heating circuits

11CTC EcoLogic M/L
G11
HP 1
1.3.1 Heat pump
CTC EcoLogic can control up to ten heat pumps*, two of which can be
connected via 3-way valves to deliver heat to either the heating circuit or the
DHW circuit.
Heat pump operation is a so-called floating condensation, where the
heat pump heats to the temperature required by the heating circuit. This
temperature varies depending on the outdoor temperature and which set
inclination and adjustment of the heat curve has been chosen. Installed room
sensors affect the temperature required in the heating circuit.
Savings from a heat pump are directly linked to the COP value. COP means
the output in proportion to the supplied power. Thus, COP = 3 means that
for 1 kW of supplied power from the compressor, 3kW of heat output is
produced.
The lower the temperature the heat pump needs to produce, the higher the
COP value obtained from the heat pump, as this is a more advantageous
operation for the compressor. The heat pump therefore only heats to the
temperature required by the heating circuit. This is economical in terms of
the service life of the compressor and in maximising operating economy.
Buffer Tank, System Types 4-6
If a buffer tank is connected (see the schematic diagrams for Systems Types
4 to 6 in the "Pipe Installation" chapter), the heating circuit can be kept at a
constant temperature.
The heat pump is controlled based on the temperature in the buffer tank.
The compressor starts at a certain predefined time after the sensor in the
tank measures a temperature that is lower than the setpoint for the tank and
stops when the tank measures a temperature difference that is set higher
than the setpoint for the tank. The indoor temperature in conjunction with the
outdoor temperature and chosen heat curve determine at which temperature
the primary flow temperature will be aimed.
Heating buffer tank
*Only applies CTCEcoLogic L. CTC
EcoLogic M can control up to two
heating pumps

12 CTC EcoLogic M/L
+
HP 1
HP 2
HP 3-10
8 kW 12 kW
17 kW17 kW
8 kW 12 kW 17 kW
17 kW 17 kW17 kW
1.3.1.1 More than two heat pumps*
Two heat pumps can be connected via 3-way valves that alternate the
charging between the DHW tank and the heating circuit. If more than two
heat pumps are installed, these are connected to the heating circuit. The
heat pumps are connected via the Modbus communication interface.
When two or more heat pumps are connected to the same system, the
common pipes, 3-way valves and mixing valves must be sized so that they
are able to cope with the total flow from the heat pumps. Check the flow of
the heat pumps by comparing primary/return/outdoor temperature (refer to
the "Installation and Maintenance Manual" chapter in the heat pump manual).
1.3.1.2 Prioritisation of heat pump operation
When CTC EcoLogic controls two or more heat pumps of different sizes, the
connected heat pumps are divided into two categories: small or large heat
pumps. Dividing the available heat pumps into two different size categories
means it is possible to change the output in small steps and in this way
achieve modulating operation.
When, for example, a need for power occurs, a large heat pump is switched
on at the same time as a small heat pump is switched off, and vice versa
when reducing power. Within both the small and large groups, reciprocal
heat pump operation is prioritised according to accumulated operation time.
When combining different types of heat pumps, air/water and ground source
pumps are prioritised according to the current outdoor temperature.
1.3.1.3 Different Heat Pumps
CTC EcoLogic can control different types of CTC heat pumps, for example,
CTC EcoAir (air/water heat pump) and CTC EcoPart (liquid-to-water heat
pump).
The outdoor temperature at which CTC EcoAir is prioritised over CTC
EcoPart is set in the "Installer/Settings/Heat Pump" menu. This means that
the operating economy can be maximised, as at a high outdoor temperature
a greater energy yield is obtained from the CTC EcoAir than from the CTC
EcoPart. This combination works exceptionally well for installations where,
for example, the ground source heat pump is undersized. An air-to-water
heat pump can then be used to give the bedrock a longer time to ‘recover’
and provide the system with increased power.
*Only applies to CTCEcoLogic L.
In the example above, 8 kW and 12 kW
are classed as small, while the two 17
kW machines are classed as large.
In the example above, 8 kW and 12 kW
are classed as small, while the four 17
kW machines are classed as large.

13CTC EcoLogic M/L
1.3.1.4 Pressure/level switch
In some cases, extra protection is required due to local requirements or
provisions. For example, the requirement in some areas is for the system to
be installed within a water catchment area.
The pressure/level switch connects to terminal blocks K22/K23/K24/K25
and is then defined in the "Installer/Define/Def. Heat Pump" menu. If there
is a leak, the compressor and brine pump stops and the Flow/level switch
alarm appears on the display.
1.3.1.5 Speed-controlled charge pump
Each heat pump should have a separate charge pump that starts and
stops together with its respective heat pump. If the charge pump is speed-
controlled, the flow will be automatically set without adjustment via the
control valve.
In the heating circuit, the charge pump will work towards a fixed difference
between supply and return from the heat pump.
If a speed-controlled charge pump is not installed, the flow may be adjusted
manually in accordance with the heat pump’s manual. The difference
between incoming and outgoing water from the heat pump will vary
depending on the operating conditions during the year.
When the outdoor temperature is less than +2 °C, the charge pumps
must start in order to protect against frost in cases where an air/water
heat pump is installed. A speed-controlled charge pump will only work at
50% of its maximum capacity. This provides for increased savings on the
charge pump’s operating economy. In addition, the heat losses are lowered
compared with a charge pump with a fixed speed setting.
1.4 DHW
DHW can be directed from heat pumps, solar panels and additional heat to
the DHW tank.
The required DHW comfort level is set in the DHW menu. In this main menu,
it is possible to schedule increased water temperatures during certain times
of the day.
The stop temperature in the DHW tank is factory-set at 55°C. When DHW
is being drained and the temperature in the tank falls to 5°C below the stop
temperature, the heat pump starts and raises the water temperature towards
the set stop temperature.
The stop temperature is adapted to DHW needs and to the heat pump
model installed.
When there is a requirement for heat in the house at the same time, the heat
pump charges the heating circuit even when the stop temperature (55°C) in
the DHW tank has been reached.

14 CTC EcoLogic M/L
1.5 Additional heat
CTC EcoLogic can control an external additional heat source (pellet, oil, gas
or electric boiler) which is connected before or after the DHW system.
In the "Installer/Settings/Additional Heat" menu, systems 1, 2 and 3 can
be set according to the cumulative heat loss in degree minutes at which
EcoLogic will start the additional heat as well as the difference between the
start and stop of the additional heat. Additional heat is factory set to start
when there is a loss of 500 degree minutes and to stop when the loss totals
400 degree minutes (set difference = 100 degree minutes).
For System Types 4, 5 and 6, additional heat can be set to start at a certain
time after heat loss occurs in the tank. The factory setting is 180 minutes.
1.5.1 Wood boiler
In system 1, CTC EcoLogic can be connected to a wood boiler.
When wood-firing is started and the flue gas sensor reaches the value set in
the "Installer/Settings/Additional Heat/Start Flue Gas °C" menu (factory-set
to ‘Off’), the control activates the "Wood operation" status.
When wood operation is active, the heat pump(s) or additional heat are not
used for heating. When the flue gas sensor is below the set value, wood
operation status is interrupted.
A charging system such as Laddomat 21 is recommended for the wood
boiler for optimum performance. In special cases, for instance operating
a water-jacketed stove, a charge pump controlled directly by the flue gas
temperature can be used.
Wood operation can also be activated when the primary flow sensor (B1) is
10 °C above the setpoint.

15CTC EcoLogic M/L
*Only applies to CTCEcoLogic L.
Solar panels
1.6 Solar panels*
Solar panels can be connected to the buffer tank, DHW system and the
bedrock/ground source heating circuit via 3-way valves.
When the temperature rises and the temperature difference exceeds 7°C
(factory setting) between the solar panels and the DHW tank, the charge
pump starts and transfers the solar heat to the DHW system. The speed-
controlled pump controls the flow so that it always delivers a temperature of
at least 7°C higher. This means that if solar panel output rises, the charge
pump will increase the flow, and if solar panel output decreases, the charge
pump will reduce the flow. When the DHW tank temperature increases or the
solar panels drop in temperature and the temperature difference becomes
3°C (factory setting), the charging stops and does not start again until the
temperature is at least 7°C warmer than in the DHW tank.
If both the DHW tank and buffer tank are defined, the DHW tank is
prioritised. Charging first takes place to the DHW tank; once the set setpoint
has been reached, charging changes to the buffer tank. Charging continues
until a need for DHW arises or the set setpoint has been reached.
There are protective functions for the solar panels/the collector (refer to the
"Installer/Settings/Solar Panels/Protection Collector" menu).
Heat exchangers and pumps (G32) do not need to be installed to the solar
heating circuit if there is already an existing loop in the connected DHW/
heating tank.

16 CTC EcoLogic M/L
1.7 Recharging bedrock/ground*
If a liquid-to-water heat pump (the CTC EcoPart) is used, a 3-way valve can
be installed in the solar circuit and connected to the brine circuit (the loop in
the borehole or the ground heat loop) to recharge the bedrock/ground when
the DHW tank/buffer tank are fully charged (factory set at 85°C), or when the
temperature in the solar panels is not sufficiently high to charge the tank but
is able to provide an addition to the brine circuit. Refer to the "Settings/Solar
Panels/Max DHW Tank°C" menu or the "Settings/Solar Panels/Max Buffer
Tank °C" menu.
The solar panel temperature should be factory set at 60°C warmer than the
brine temperature for the charging to start (refer to the "Installer/Settings/
Solar Panels/dT Max Bedrock °C" menu). When the difference between
the temperature in the solar panels and the brine circuit falls to 30°C, the
charging is stopped. If the brine circuit temperature becomes warmer than
the set value, recharging will also be interrupted, as the temperature then
becomes too high for the heat pump to work (refer to the "Installer/Settings/
Solar Panels/Max Brine °C" menu).
When the solar energy system works towards the brine circuit, the flow is
factory set to switch to the DHW circuit every thirty minutes (refer to the
"Installer/Settings/Solar Panels/Test Frequency Min" menu) to check whether
charging is possible, since the DHW circuit always has the highest priority.
If possible, charging towards the DHW tank will continue. Otherwise the
charging reverts to the brine circuit.
Solar panels
*Only applies to CTCEcoLogic L.

17CTC EcoLogic M/L
1.8 Cooling*
Cooling – also called “natural cooling” or “passive cooling” – exploits the free
cooling found in bedrock. A bedrock/ground source heat installation is easily
supplemented with a fan convector, a circulation pump, pipe and pipe parts,
e.g. CTC EcoComfort. Operating costs are very low as the cold itself does
not need to be produced, instead being simply transferred from the bedrock
to the house.
In the "Installer/Settings/Cooling" menu, the temperature from which cooling
will be permitted, among other things, can be set.
1.9 Pool*
For System Types 4 to 6, the pool can be connected in parallel with the
heating circuit via a heat exchanger in order to separate the liquids.
Fan convector
*Only applies to CTCEcoLogic L.
Via a sensor in the pool, the pool’s charge pump starts and stops in order
to maintain the set temperature in the pool (factory set at 22°C) and the
temperature is allowed to fall by 1°C before the charge pump starts again. It
is also possible to set a high and low pool priority, which determines whether
additional heat will be used to heat the pool. See the "Installer/Settings/Pool"
menu.
Pool

18 CTC EcoLogic M/L
*Only applies to CTCEcoLogic L.
1.10 Active cooling*
1.10.1 EcoLogic System 4
• 3-way valve (Y61) is activated when heat pump(s)
produce cooling. Additional heat (E1-E3) is
bypassed if the 3-way valve is installed.
• The mixing valve (Y2) is closed for additional heat
during cooling.
• Return sensor (B73) is used for the cooling return
from the heating system.
• All heat pumps of model CTC CombiAir (1- 4 HP)
can produce cooling. They are connected to a
3-way valve (Y61).
• Max. two heat pumps (HP1 and HP2) are used
to produce hot water (via 3-way valve (Y21) and
(Y22)). Together, these heat pumps will produce
either cold, hot water or heating.
Common heating/cooling tank
• When switching from heating to cooling:
- Heating is deactivated.
- Delay until cooling is allowed (see menu
”Installer/Settings/Cooling”).
• When switching from cooling to heating:
- Heating is activated.
• Cooling and heating cannot be active at the same
time.
Separated heating/cooling tank
• Cooling and additional heat sources cannot be
active at the same time.
1.10.2 EcoLogic System 5
Common and separated heating/cooling
• The only difference compared to system 4 is that
system 5 lacks additional heat (E1-E3).
EcoLogic System 4 - bypassing additional heat during cooling.
Example with three heat pumps.
EcoLogic System 4/5 - Common heating/cooling tank.
Example with four heating systems, no pool heating allowed when
cooling.
HP1
Heating/Cooling
HP2
Heating/Cooling/DHW
HP1
Heating/Cooling
Heating
Heating
Heating
Heating,
Cooling
or
Heating/Cooling
B73-Cooling
Buffer
Heating,
Cooling

19CTC EcoLogic M/L
Y62
B61
Buffer
Cooling
Buffer
Heating
Y61-Cooling
B73-Cooling
B73-Cooling
Heating or Cooling
Heating
Heating
Heating,
Cooling
or
Heating/Cooling
Option A
Option B
Option
A:B
DHW
EcoLogic System 4 - separated heating/cooling tank.
1.10.3 Electrical components
The following electrical components must be installed during active cooling:
• Sensor (B61) in cooling tank.
• Return sensor (B73).
• Primary flow sensor 3 (B3)
- When separated heating/cooling, the system is regulated with (B3).
• 3-way valve, heating/cooling (Y61).
- With separate heating/cooling tank and to bypass additional heat.
• 3-way valve, cooling relay (Y62).
- To avoid heat loss from the heat tank in a separate heating/cooling
tank system. The external control signal that is sent when cooling
demand is active can also be used for, for example, a floor heating
system.

20 CTC EcoLogic M/L
1.10.3.1 Control logic, consumer
The control logic for the consumer is described below. See the “Settings
Cooling” section of the “Control system” chapter for more information about
relevant menu settings.
Active cooling must be defined in the “Installer/Define/Cooling” menu in order
to be activated as shown below.
Common heating/cooling
Active cooling in a common system is permitted if the following criteria are
met at the same time:
• the delay time has passed after the production of heat has ended.
--> see menu bar “Heating off, delay”.
• the outdoor temperature exceeds (or is equal to) the temperature from
which cooling is to be permitted.
--> see the “Cooling permit. from outdoor T ºC” menu.
Non-common heating/cooling
Active cooling in a separate system is permitted if the following criteria are
met at the same time:
• the outdoor temperature exceeds (or is equal to) the temperature from
which cooling is to be permitted.
--> see the “Cooling permit. from outdoor T ºC” menu.
• For systems with common heating/cooling tank:
the delay time has passed after the production of heat has ended.
--> see menu bar “Heating off, delay”.
Room sensor installed
If a room sensor has been installed, active cooling is permitted if the
following criteria are met at the same time:
• the room temperature exceeds (or equals) the set value plus the set
temperature diff.
--> see the “Room temp cooling ºC” menu.
--> The temperature diff. is set in the “Service/Coded settings” menu.
• when the delay time has passed.
--> see the “Start delay” menu.
Active cooling is stopped when the room temperature is less than (or equal
to) the set stop temperature minus the set temperature diff.
Room sensor not installed
• Cooling is activated when the delay time has passed.
--> see the “Start delay” menu.
Block cooling
• Cooling can be temporarily deactivated by blocking cooling externally
without any effect on delays.
--> see the “Ext. block cooling” menu.