IVT Greenline HT Plus E Operating manual

Greenline HT Plus
C and E
Assembly, Commissioning
and Maintenance Guide
Art. no.: 10245 Version 1.4

2
Manual for Heat pump Greenline HT Plus C and E
IVT Industrier AB, September, 2008
Article number: 10245
Version 1.4
Copyright © 2008. IVT Industrier AB. All rights reserved. IVT reserves the right to make changes to the product without prior notice.
This manual contains copyright protected information that is the property of IVT Industrier AB. No part of this document may be copied or forwarded, electronically or
mechanically, without prior, written permission from IVT Industrier AB. This includes photographing and translation to another language.
Thank you for choosing a heat pump from IVT
Industrier AB
We hope that our heat pump meets your expectations and gives you many years of energy saving. We want you and
your family to enjoy a good economy at the same time as you actively safeguard the environment. We have taken today’s
demands on heat pumps into consideration and believe that your Greenline HT will give you many useful functions in the
future. Your heat pump features an advanced control unit that monitors and controls the temperature in the house and
contributes towards improved overall economy. The heat pump Greenline HT Plus has, for example, a holiday function,
that's to say the heat pump can be set at a “low level” while you are away on holiday.
IVT is the leading heat pump manufacturer in the Nordic Countries. We have worked with solutions to reduce energy
consumption on the environment’s terms for more than 30 years. Today we can presented the widest range of heat pumps
for efficient energy saving in all types of housing and properties.

3
Table of Contents
Contents
FOR THE USER.....................................................................................................5
Important information....................................................................................... 5
This is how your heat pump works ..................................................................... 6
Technology in and around the heat pump................................................................................................................6
Component parts of the heat pump .................................................................... 8
IVT Greenline HT Plus C........................................................................................................................................8
IVT Greenline HT Plus E........................................................................................................................................9
Control unit Rego 637..................................................................................... 10
The control unit’s two methods to control the heat pump........................................................................................11
Control panel.................................................................................................. 12
Controls and status lamps .....................................................................................................................................12
Menu dial .............................................................................................................................................................13
How to use the control panel .................................................................................................................................13
Basic functions (Customer level 1) ................................................................... 13
Menu outline for Basic functions (Customer level 1).............................................................................................14
Select scrolling information on the menu display...................................................................................................14
Set the heating ......................................................................................................................................................15
Set the desired room temperature ..........................................................................................................................18
Set the heat pump for extra hot water ....................................................................................................................18
Heating and hot water settings ..............................................................................................................................19
Read the temperatures on the heat pump...............................................................................................................19
Extra functions (Customer level 2) ................................................................... 21
Menu outline for Extra functions (Customer level 2).............................................................................................21
Temperature settings.............................................................................................................................................22
Set extra heat curve with shunt .............................................................................................................................23
Hot water settings..................................................................................................................................................24
Timer control........................................................................................................................................................24
Reading operating times on the heat pump and additional heat ............................................................................25
Set the time and date ............................................................................................................................................26
Alarms given by the heat pump .............................................................................................................................27
Return to factory settings.......................................................................................................................................27
Maintenance................................................................................................... 28
Opening the front cover .........................................................................................................................................28
Sight glass.............................................................................................................................................................28
Expansion tank .....................................................................................................................................................29
Particle filter.........................................................................................................................................................30
Checking the protective anode ...............................................................................................................................30
What to do if a fault occurs .............................................................................. 31
Dimmed menu display ..........................................................................................................................................31
Fuses and reset buttons in the heatpump ...............................................................................................................32
All alarms.............................................................................................................................................................32

4
FOR THE INSTALLER .......................................................................................... 39
Important information for the installer.............................................................. 40
Checklist ........................................................................................................ 40
What the shipment includes............................................................................. 41
Dimensions and connections ........................................................................... 42
The heat pump and collector hose in general..................................................... 43
Transporting the heat pump..................................................................................................................................43
Positioning the heat pump.....................................................................................................................................43
Maximum working temperatures ..........................................................................................................................43
Minimum working temperatures...........................................................................................................................43
Fit the particle filter ..............................................................................................................................................43
Collector hose ........................................................................................................................................................44
Installing the expansion vessel ...............................................................................................................................46
Preparations before connection........................................................................ 47
Moving the heat transfer fluid pipe for side entry ...................................................................................................47
Supplementing the heat pump with a ground water system....................................................................................50
Ground water system: Electrical connection ..........................................................................................................51
Connecting the heat pump to the heating system ............................................... 51
Connecting to the heating system without a bypass:................................................................................................52
Connect heat pump C to the heating system ...........................................................................................................53
Connect heat pump E to the heating system ...........................................................................................................54
Connect the heat pump to a heating system with bypass .........................................................................................55
Filling water in the heating system .......................................................................................................................56
Filling the heat transfer fluid in the collector hose .................................................................................................56
Connecting the heat pump to the power supply ................................................. 59
Safety switch and earth-fault breaker.....................................................................................................................59
Installing the sensor ..............................................................................................................................................59
External connections to the heat pump ..................................................................................................................60
Connecting the general alarm, external input and load monitor............................................................................61
Installer and service menu (I/S) ...................................................................... 62
How to use the control panel .................................................................................................................................62
Commissioning the heat pump......................................................................... 63
Manual test run of the heat pump .........................................................................................................................63
Start the heat pump ..............................................................................................................................................63
Menu displays you might need to adjust or check ...................................................................................................64
Start the heat pump with only additional heat.......................................................................................................67
Important points to check after start up.................................................................................................................67
Technical information...................................................................................... 68
The heat pump's factory settings ............................................................................................................................68
Sensor table...........................................................................................................................................................68
Technical information 3-phase models ..................................................................................................................69
Technical information 1-phase models ..................................................................................................................70
Table of Contents

5
Note
It is important as the user that you
read through the User manual.
Under no circumstances may the user
make settings that are designed for
the installer. This can cause serious
malfunction of the heat pump.
Important information
The heat pump Greenline HT Plus represents a new generation of heat
pumps from IVT Industrier. It contains numerous functions to control the
temperature and production of hot water in the house. The control unit Rego
637 is the brains of the heat pump. Rego 637 includes a control and monitor-
ing function that stores important settings about the heat pump's operation
and maintenance. The settings are made by the installer and the user via a
control panel on the front of the heat pump. Settings, intended for the user
are presented under the headings Basic functions and Extra functions.
When the heat pump has been installed and started there are a number of
points you should check regularly. This may concern an alarm triggering
or performing basic maintenance actions. Initially you should perform
these actions on your own. This manual describes each step in detail. If the
problem remains you should contact your dealer.
For the user
Only a trained and qualified technician may carry out repairs to this machine. Incorrect repairs
can lead to serious risks to the user, and a reduction in savings.
Visits from an authorised Service representative to make corrections or adjustments after such
a repair, cannot in such cases be carried out free of charge, not even during the warranty period.
Note

6
FOR THE USER
This is how your heat pump works
The heat pump HT Plus has been manufactured for easy and reliable use as well as to provide your house with inexpensive
and environment friendly heating. The easiest way to describe how a heat pump works is to say it works like a refrigerator,
however, the other way round. In a refrigerator heat is moved from the inside to the outside. In a heat pump, heat stored in
the ground, rock or water, is moved into the house. The heat pump reclaims the stored solar energy, which is then led into
the house via a hose. The temperature is then increased in the heat pump and the heat is distributed to the house’s heating
system.
The heat pump collects stored solar energy
Boiling point in relation to the
pressure:
The boiling point of different liquids
varies with pressure, the higher the
pressure, the higher the boiling point.
For example, water boils at +100ºC
at normal pressure. Double the pres-
sure and water boils at +120ºC. Half
the pressure and water then boils at
+80ºC. The refrigerant in the heat
pump acts in the same way, the boil-
ing point changes when the pressure
changes. However, the boiling point of
the refrigerant is as low as approxi-
mately -40ºC at atmospheric pressure.
Consequently, it is also suitable for
low heat source temperatures.
Note
Bedrock heat Ground heat Lake water heat
The heat pump consists of four main parts:
1. Evaporator
Evaporates the refrigerant to gas and at the same time transfers the
heat from the heat transfer fluid to the refrigerant circuit.
2. Condenser
Condenses the gas to fluid again and transfers the heat to the heating
system.
3. Expansion valve
Lowers the pressure and temperature of the refrigerant
4. Compressor
Increases the pressure and temperature of the refrigerant
These four main parts are linked in three circuits. A refrigerant circulates
in the heat pump, which in some parts of the circuit is in a liquid state and
in other parts in a gas state. Read more about the properties of the refriger-
ant in the sidebar to the right.
The heat pump is a unit of the indirect system type, which is pressure
tested and test operated from the factory.
See the detailed description of the technologies used in the heat pump on
the next page.
Technology in and around the heat pump
This is how your heat pump works

7
FOR THE USER
Heat transfer fluid in. The plastic hose contains a heat transfer fluid, which is a mixture of water and anti-
freeze. The fluid collects the stored solar energy from the ground and with the help of the HTF pump leads it
into the heat pump and the evaporator. The temperature is then 0ºC.
In the evaporator the heat transfer fluid meets the refrigerant. At this stage the refrigerant is in a fluid state
and is at approximately -10ºC. When the refrigerant meets the zero degree heat transfer fluid it starts to boil.
It then forms a vapour, which is led into the compressor. The temperature of the vapour is 0ºC.
I the pressure of the refrigerant increases in the compressor and the vapour temperature rises from 0ºC to
approximately +100ºC. The warm gas is then forced into the condenser.
In the condenser, the heat is transferred to the house’s heating system (radiators and floor heating) and the
hot water system. The vapour is cooled and becomes fluid. The pressure in the refrigerant is still high when it
is led on to the expansion valve.
The refrigerant pressure is lowered in the expansion valve. At the same time, the temperature also drops to
approximately -10ºC. When the refrigerant passes the evaporator it changes to vapour again.
HTF (coll) out. The heat transfer fluid is led out from the heat pump to the rock to collect new stored solar
energy. The temperature of the fluid is approximately -3ºC.
1
2
3
4
5
6
Floor heating
Radiator
Fan-assisted
radiator
Heat pump
Rock
Soil
0ºC
-3ºC
0ºC +100ºC
-10ºC
1
6
2 3 4
5Heat carrier
pump
Heat transfer
fluid pump
This is how your heat pump works
"Hot side"
"Cold side"

8
FOR THE USER
Component parts of the heat pump
Three-way valve
The valve switches between heating
the heating water and hot water.
Hot water heater
Double-shelled hot water cylinder
with inner section for hot water and
outer section heating water.
Electric cassette
The electric cassette is used
to provide extra output in cold
weather conditions, with large
water consumption and at hot
water peaks.
Reset button
Press in the button if the overheat
protector on the electric cassette
has tripped. The button is located
on the side.
Heat carrier pump
The pump ensures the heating
water circulates within the heating
system.
Compressor
The compressor increases the
pressure of the refrigerant.
The temperature of the vapour
increases from 0ºC to approxi-
mately +100ºC. The compressor is
insulated to reduce the noise level.
Electrical connections
Connections for the mains supply
as well as sensors.
Control panel
The control panel has a back-
ground lit menu display with four
rows of text information, three
buttons and a dial.
Electric box
The distribution box is enclosed.
It houses a reset function for the
motor cut-out as well as miniature
circuit breakers (MCB) for the
heat pump and electric cassette.
Heat transfer fluid pump
The pump is insulated and
features an anti-corrosive finish.
It ensures the heat transfer fluid
circulates from, e.g. the rock to
the heat pump.
Control unit
The control unit is enclosed. It
controls and monitors all heat
pump functions.
Expansion valve
Lowers the pressure of the refrig-
erant that enters the evaporator
and collects energy from, e.g. the
rock.
Flexible hoses
The hoses counteract vibrations in
the heat pump.
IVT Greenline HT Plus C
Evaporator
The evaporator evaporates the
refrigerant to gas and transfers
heat from the heat transfer fluid to
the refrigerant circuit.
Condenser
The condenser condenses the
vapour to fluid again and transfers
the heat to the heating system.
Component parts of the heat pump
Venting nipple
The nipple is used to vent the
heating water in the cylinder.
Sight glass
The sight glass is used to check the
amount of heat transfer fluid in the
HTF circuit. Air bubbles must not
form in the sight glass when the heat
pump is running. However, there
might be bubbles when the heat
pump is started and stopped.

9
FOR THE USER
IVT Greenline HT Plus E
Reset button
Press in the button if the overheat
protector on the electric cassette
has tripped. The button is located
on the side.
Heat carrier pump
The pump ensures the heating
water circulates within the
heating system.
Compressor
The compressor increases the
pressure of the refrigerant.
The temperature of the vapour
increases from 0ºC to approxi-
mately +100ºC. The compressor is
insulated to reduce the noise level.
Electrical connections
Connections for the mains supply
as well as sensors.
Control panel
The control panel has a back-
ground lit menu display with four
rows of text information, three
buttons and a dial.
Electric box
The distribution box is enclosed.
It houses a reset function for the
motor cut-out as well as miniature
circuit breakers (MCB) for the
heat pump and electric cassette.
Heat transfer fluid pump
The pump is insulated and features
an anti-corrosive finish. It ensures
the heat transfer fluid circulates
from, e.g. the rock into the heat
pump.
Control unit
The control unit is enclosed. It
controls and monitors all heat
pump functions.
Expansion valve
Lowers the pressure of the
refrigerant that enters the evapora-
tor and collects energy from, e.g.
the rock.
Sight glass
The sight glass is used to check the
amount of heat transfer fluid in the
HTF circuit. Air bubbles must not
form in the sight glass when the heat
pump is running. However, there
might be bubbles when the heat
pump is started and stopped.
Flexible hoses
The hoses counteract vibra-
tions in the heat pump.
Evaporator
The evaporator evaporates the
refrigerant to gas and transfers
heat from the heat transfer fluid to
the refrigerant circuit.
Particle filter
The filter can be opened for easy
cleaning. It also has a shut off
function.
Electric cassette
The electric cassette is used
to provide extra output in cold
weather conditions, with large
water consumption and at hot
water peaks.
Three-way valve
The valve switches between heating
the heating water and hot water.
Condenser
The condenser condenses the
vapour to fluid again and transfers
the heat to the heating system.
Component parts of the heat pump

10
FOR THE USER
Control unit Rego 637
The control unit is the brains of the heat pump. It makes sure the heat
pump gives the best energy savings and that it runs for many years. The
control unit controls and monitors the heating and hot water supply in your
house. The monitoring function is especially important. It shuts down the
heat pump in the event of operational disturbances so that no critical parts
are damaged.
Additional heat gives more output
When the heat pump can not manage to heat the house by itself, for
example, if there is a considerable drop in the outdoor temperature, the
control unit ensures the additional heat source is connected. Together
the heat pump and additional heat guarantee the right temperature in the
house. Additional heat in the Greenline HT Plus is provided by a built
in electric cassette. Additional heat can never completely take over the
heating from the heat pump. It only adds the output necessary for the heat
pump to be able to produce the right temperature. When the heat pump
can once again manage heating on its own the additional heat is automati-
cally disconnected.
Hot water is given priority over heating water
In a house with water based heating a difference is made between heating
water and hot water. The heating water is for radiators/floor heating and
hot water is for showers and taps. Hot water is heated in a hot water heater.
The hot water heater is fitted with a sensor that senses the temperature of
the hot water. C models include a hot water heater in the heat pump while
E models have an external hot water heater. The heating water passes
through the hot water cylinder’s outer shell and heats up the hot water
heater’s inner tank. The control unit makes sure the heating of hot water is
always given priority over the heating of the heating water. This means you
never need to be without hot water. The control unit controls a three-way
valve that switches between heating the heating water and hot water. Once
the hot water has been heated the three-way valve switches so that the
heating water is heated.
Control unit
Electric cassette
(additional heat)
Three-way
valve
Double-shelled
hot water cylinder
Heating water
Hot water
Control unit Rego 637

11
FOR THE USER
Control unit Rego 637
The control unit’s two methods to control
the heat pump
The control unit uses two different methods to control the heat pump.
These two methods are: Control with an outdoor sensor and Control with an
outdoor sensor supplemented with a room sensor.
Control with an outdoor sensor
Control with an outdoor sensor is the most common method used by the
control unit to control the heat pump. When the heat pump is delivered it
is set for this control method. A sensor is fitted on the outside wall of the
house. It sends signals to the control unit in the heat pump. Control with
an outdoor sensor means that the heat pump automatically regulates the
heating in the house depending on the outdoor temperature. If the outdoor
temperature drops, i.e. it becomes colder; the radiators inside the house
will become warmer.
You determine the temperature of the radiators, in relation to the outdoor
temperature, with the help of a number of settings such as selecting the
heat curve on the control unit. A lower curve gives higher energy savings.
Control with an outdoor sensor supplemented with
a room sensor
Control with an outdoor sensor supplemented with a room sensor means
that you also place a sensor in a central position inside the house. This is
connected to the heat pump and provides the control unit with information
about the room temperature. The signals affect the control unit’s settings
(curves) and ensure the heat pump gives the best possible energy savings.
This control method is used when factors other than the outdoor tem-
perature influence the indoor temperature of the house. For example, this
can be when a stove or fan-assisted radiator is used in the house, or if the
house is sensitive to the wind.
It is only the room where the room
sensor is located that can influence
regulation of the temperature.
Note
When using night reduction or a form
of external control of the heat pump,
the room sensor becomes inactive for
2 hours.
Note

12
FOR THE USER
Control panel
All settings are made from the control panel. It also displays heat production
statistics and information about different alarms. When you have made your
settings, the control panel makes sure they are saved in the control unit
Rego 637 to carry out your wishes.
Control panel
Controls and status lamps
Power switch (ON/OFF)
You start and stop the heat pump using the power
switch button.
Lamp on: The heat pump is on.
Lamp flashes: The heat pump is off.
Operating status
Lamp on: The heat pump (compressor) is
operational.
Additional heat status
Lamp on: The heat pump is using additional heat
from an electric cassette.
Hot water status
Lamp on: The heat pump is heating water in the
heater.
Lamp flashes: The heat pump has a hot water
peak or is producing extra hot water.
Alarm status
Lamp flashes: A fault has occurred in the heat
pump.
Lamp on: The alarm has been acknowledged, but
the fault remains.
Temperature Temperature
Pressing once gives a shortcut to the most frequent
temperature settings.
Info
Pressing once gives continuous information about the
heat pump’s and additional heat’s operating conditions.
Menu
Press once to enter the main menu. The main menu
contains all setting menus and temperature displays.
Info
Menu
Control panel
Menu dial
Status lamps
Power switch (ON/OFF)
Menu display
Menu buttons
Rego 637 K1
080922 16:08:15 Fr
Heat Info Menu
Rego 637 K1
080922 16:08:15 Fr
Heat Info Meny

13
FOR THE USER
Control panel
Menu dial
The menu dial is used to scroll through the menu display windows. Turn
the menu dial clockwise (to the right) to move down through the menus.
Turn the menu dial anti-clockwise (to the left) to move up through the
menus. You also determine the values of different settings by using the dial.
The menu display gives you information and the chance to make settings.
You can:
Choose different temperature and hot water settings.
Choose extra hot water and the holiday function.
See alarm causes and receive corrective instructions.
Obtain operating statistics.
How to use the control panel
The principle of the control panel is based on the user using three
menu buttons and a menu dial to move between the different
menus and settings. On the lower row of the menu display you will
always see information about the significance of the buttons. The
function of the buttons changes depending on which window you
are currently in.
Example
If, from the initial menu, you press the Heat button, you will access
the menu Temp. incr. / decr. In this menu you can increase and
decrease the heating in the house. Note that the significance of the
buttons has now changed. You can either return to the initial menu
by pressing the Return button or you can choose to change the
heating setting in the house by pressing the Adjust button. If you
press the Adjust button you can increase or decrease the heating in
the house by using the menu dial. Save your adjustment by pressing
the Save button.
Initial menu display
+
Initial menu
ClockDate
Customer level 1
Day
Basic functions (Customer level 1)
Basic functions (Customer level 1) are the functions most frequently used
and the ones you have the most benefit of. You reach the basic functions
by pressing one of the Heat, Info or Menu buttons in the initial menu.
The designation K1 in the upper right corner indicates you are in Basic
functions - Customer level 1.
Rego 637 K1
080922 16:08:15 Fr
Heat Info Menu
Rego 637 K1
080922 16:08:15 Fr
Heat Info Menu
Rego 637 K1
080922 16:08:15 Fr
Heat Info Menu
Temp. incr. / decr.
0 5,0 10
Return Adjust

14
FOR THE USER
Basic functions - Customer level 1
The menu display is standard
on all heat pumps.
=
=The menu display is only
shown on the heat pump in
combination with an extra
sensor or for a specific model of
Greenline HT Plus.
Note
Each menu is numbered in the lower
right-hand corner; this indicates which
main display it is associated to.
Select scrolling information on the menu display
If you press the Info button in the initial menu you will receive continuous
information about the heat pump’s operation and working temperatures.
This is what to do:
1. Press the Info button in the initial menu.
Here follows a few of the windows displayed:
Menu outline for Basic functions (Customer level 1)
Rego 637 K1
080922 16:08:15 Fr
Heat Info Menu
Rego 637 K1
080922 16:08:15 Fr
Heat Info Menu
Temp. fine-tune
Page 17
Temp. incr. / decr.
Page 16
Room temperature
Page 18
Extra hotwater
Page 18
STANDBY
No rad heat required
No hotwater required
Page 15
HOTWATER MODE
Heat pump only
Page 15
HEAT RAD MODE
Compr. + Add. heat
Page 15
HEAT RAD REQ
Heat pump starts
in #### seconds
Page 15
Main menu
Indoor temperature
settings 1
Page 19
Temperature settings
Temp. incr. / decr.
range 0-10 1.1
Page 16
Temperature settings
Temp. fine-tune
range -10/+10 1.2
Page 17
Temperature settings
Setting of room
temperature 1.10
Page 18
Main menu
Adjusting the hot
water settings 2
Page 19
Hot water setting
Duration of
add. hot water 2.1
Page 18
Main menu
Monitor all
temperatures 3
Page 19
Temperature readings
Return radiator GT1
Temperature readings
Out GT2
Temperature readings
Hot water GT3
Temperature readings
Shunt, flow GT4
Temperature readings
Room GT5
Temperature readings
Compressor GT6
Temperature readings
Heat trfluid out GT8
Temperature readings
Heat tr fluid in GT9
Temperature readings
Ht trfld(coll)inGT10
Temperature readings
Httrfld(coll)outGT11
Page 20

15
FOR THE USER
The heat pump is in standby mode.
The heat pump is producing hot water. You see at which temperature
the heat pump will stop and the present temperature. Note that the stop
temperature is read at the bottom of the heater. The hot water is several
degrees hotter at the top of the cylinder.
The heat pump and additional heat are running.
The heat pump has received signals that it should produce heating. It now
waits for the restart time to countdown to zero.
Return to the initial menu by pressing one of the buttons or turn the dial.
Basic functions - Customer level 1
Set the heating
It is easy to set the heating level on the heat pump. However, before we
explain how to do this it is important to understand the relation between
the outdoor temperature, return temperature and heat curve slope. The
easiest way to explain the relation is with a heat curve.
Heat curve
You use the heat curve to help set the indoor temperature you would
like. The heat pump is controlled by the outdoor temperature. When the
weather becomes colder the heat pump ensures more heating is produced
automatically.
Return temperature:
The return temperature is the temperature of the water that returns to the
heat pump from the radiators. The water led out from the heat pump to the
heating system is normally 7-10ºC higher than the return temperature.
When the outdoor temperature is -10ºC and curve 4 is set, the pump
attempts to keep the return water at approximately 40ºC.
Outdoor temperature:
The outdoor temperature determines how much heating the heat pump
should produce. A sensor placed outdoors sends signals to the control unit,
which then adjusts the heat pump.
Curve slope:
You can change the curve slope to increase or decrease the heating in the
house. The scale is between 0-10.
On delivery the heat pump curve
slope is set to position 4. This means
that the return temperature is +35ºC
when it is 0ºC outdoors.
Note
STANDBY
No rad heat required
No hotwater required
HEAT RAD REQ
Heat pump starts
in 320 seconds
HOTWATER MODE
Heat pump only
Stop temp 53,0°
Present temp 42,0°
HEAT RAD MODE
Compr. + Add. heat
Stop temp 45,0°
Present temp 44,0°

16
FOR THE USER
In cold weather (below +5ºC):
If you are not satisfied with the indoor temperature when it is colder than
+5ºC outdoors, you need to change the slope of the heat curve.
This is what to do:
1. Press the Heat button in the initial menu.
2. Press the Adjust button.
3. Turn the menu dial clockwise to increase the heating.
Turn the menu dial anti-clockwise to lower the heating.
(Adjust in small increments, 0.2-0.6 units is usually enough.)
4. Save the new value by pressing the Save button.
Basic functions - Customer level 1
Dashed line:
If the return temperature exceeds 57ºC an alarm is given and the compres-
sor switches off. The heat pump starts automatically when the return
temperature drops.
Curve slope:
2-4 Normal setting for floor heat-
ing.
4-6,5 Normal setting for radiators.
7-10 Abnormal high setting.
From the heat curve we see that
curve slope 4 gives a return tempera-
ture of +35ºC when it is 0ºC outdoors.
If the outdoor temperature drops we
can see that the return temperature
increases. The colder the outdoor
temperature the higher the return
temperature. At an outdoor tempera-
ture of approximately -30ºC we see
the curve slope has nearly reached
the limit value (+57ºC) for the return
temperature.
You should wait at least one day when
increasing or decreasing the heating
before making a new adjustment.
If it is still difficult to get a comfort-
able indoor temperature at an outdoor
temperature around 0ºC, despite
several attempts, you should "adjust
the heat curve". Read how to "adjust
the curve"in the section Extra func-
tions - Customer level 2 / Temperature
settings / Adapting the heat curve.
Note
Change the curve slope
Raising or lowering the curve slope in the menu Temperature increase/
decrease influences the heat pump’s production of heat. This is especially
effective in cold weather conditions.
Return temperature (ºC) Curve slope (0-10)
Outdoor temperature (ºC)
Temp. incr. / decr.
0 4,0 10
Return Adjust
Temp. incr. / decr.
0 5,0 10
Return Adjust

17
FOR THE USER
Basic functions - Customer level 1
Fine-tune the temperature setting
The heat curve can also be fine-tuned. Fine-tuning means that you offset
the heat curve in parallel. Fine-tuning is done in the menu Temp. fine-tune
The diagram for fine-tuning shows how the dashed line has been offset
upwards in parallel. This means the heating has been fine-tuned in a
positive direction and the heat pump will be instructed to maintain a higher
temperature on the return water at all outdoor temperatures.
Outdoor temperature (ºC)
Return temperature (ºC)
By using the menu dial on the
control panel the fine-tuning line
has been moved up so the heat
pump produces more heat.
In warm weather (above +5ºC):
If you are not satisfied with the indoor temperature when it is warmer than
+5ºC outdoors, you should offset the curve in the menu Temp. fine-tune
This is what to do:
1. Press the Heat button in the initial menu.
2. Turn the menu dial clockwise until you reach the menu Temp. fine-tune
3. Press the Adjust button.
4. Turn the menu dial clockwise to increase the heating.
Turn the menu dial anti-clockwise to lower the heating.
(Adjust in small increments, 0.5-1.0 units is usually enough.)
5. Save the new value by pressing the Save button.
Temp. fine-tune
-10° 0,0 10°
Return Adjust

18
FOR THE USER
Set the desired room temperature
If you have a room sensor connected to the heat pump, use menu Room
temperature in the room from the Room temperature menu. From Extra
functions (Customer level 2) you can also set how much you want the sensor
to influence the heating system.
This is what to do:
1. Press the Heat button in the initial menu.
2. Turn the menu dial clockwise until you reach the menu Room temperature.
3. Press the Adjust button.
4. Turn the menu dial clockwise to increase the room temperature.
Turn the menu dial anti-clockwise to lower the room temperature.
5. Save the new value by pressing the Save button.
Note
The example describes how to set the
required room temperature with the
help of a connected room sensor. The
range is 10ºC to 30ºC.
Set the heat pump for extra hot water
You can obtain extra hot water by temporarily increasing the temperature
of the water in the hot water cylinder. This may be appropriate when, for
example, a large number of people need to shower. On the control panel
and the menu Extra DHW you choose how long the function should run.
This is what to do:
1. Press the Heat button in the initial menu.
2. Turn the menu dial clockwise until you reach the menu Extra DHW.
3. Press the Adjust button.
4. Turn the menu dial clockwise to choose the number of hours that the
electric cassette should be on (e.g. 24 hours).
5. Save the value by pressing the Save button.
When the set time has elapsed you
must repeat the setting to get extra
hot water again.
Note
Basic functions - Customer level 1
Room temperature
10° 20,0 30°
Return Adjust
Extra hotwater
1h 24h 48h
Return Adjust
Extra hotwater
1h 24h 48h
Return Save

19
FOR THE USER
Basic functions - Customer level 1
Heating and hot water settings
Move to the temperature settings for heating on Customer level 1 like this:
1. Press the Menu button in the initial menu.
2. Press the Select button and scroll through the heating menus with the
menu dial.
Move to the temperature settings for hot water on Customer level 1 like this:
1. Turn the menu dial clockwise until you reach the menu Adjusting the hot
water settings.
2. Press the Select button and scroll through the hot water menus with the
menu dial.
Read the temperatures on the heat pump
There are several different temperature sensors in the heat pump. Each
sensor plays an important part in the heat pump's daily operations. It may, for
example, adjust the heating production so that the pump does not become
overheated. Proceed as follows to read the temperatures on the heat pump:
1. Press the Menu button in the initial menu.
2. Turn the menu dial clockwise until you reach the menu Monitor all
temperatures (menu 3).
3. Press the Select button.
4. Turn the menu dial to scroll through all the heat pump’s temperature
sensors.
Note
Each menu is numbered in the lower
right-hand corner; this indicates which
main display it is associated to.
Rego 637 K1
080922 16:08:15 Fr
Heat Info Menu
Main menu
Indoor temperature
settings 1
Return Select
Main menu
Adjusting the hot
water settings 2
Return Select
Main menu
Monitor all
temperatures 3
Return Select

20
FOR THE USER
All the temperature sensor menus
All the windows associated with the heat pump's temperature sensors are
presented below. Note that you cannot make any settings in these menus,
only read the current values. Some menus are standard for all models of
Greenline HT Plus while others are only available in combination with
different accessories.
The sensors give an alarm if the temperature is outside of the permitted
interval/values.
Note
All sensors are not included as
standard on the heat pump, some are
available as accessories for different
application areas. See more informa-
tion under respective menus.
The menu shows the temperature in the heating system’s return, i.e. the water from the
radiators back to the heat pump in heating mode. This temperature varies depending on
the outdoor temperature.
The menu shows the outdoor temperature. Some deviation compared to the true tempera-
ture may occur due to thermal radiation from the house to the installed outdoor sensor.
The menu shows the set and present temperature in the lower section of the outer
container in the hot water cylinder. The temperature is approximately 5ºC lower than the
temperature of the hot water inside the inner container.
The menu only applies together with a flow sensor. If an extra curve with mixing valve
is used, for example, for a floor heating system, you can see the temperature on the flow
water in the circuit. The temperature varies with the outdoor temperature.
The menu only applies together with a room sensor. The menu shows the set point value
and present temperature in the room where the sensor is fitted.
The menu shows the compressor’s working temperature. The temperature varies
between 70ºC and 125ºC during operations.
The menu shows the temperature of the radiator water as it leaves the heat pump. It
varies depending on the outdoor temperature and whether the heat pump is in hot water
production mode.
The menu shows the temperature of the water that is led into the heat pump. It varies
depending on the outdoor temperature and whether the heat pump is in hot water produc-
tion mode. The heat pump stops at 57ºC for reasons of safety.
The menu shows the temperature of the heat transfer fluid that is led into the heat pump
from the bore hole or the ground. It can vary between -5ºC to +15ºC during a season.
The menu shows the temperature of the heat transfer fluid that is led out of the heat
pump to the bore hole or the ground. Normally, during operations, it is 1.5 - 5.0 degrees
lower than the heat transfer fluid that is led into the heat pump.
Basic functions - Customer level 1
Temperature readings
Return radiator GT1
Off 41,3O Now 40,3O
Return
Temperature readings
Out GT2
14,0°
Return
Temperature readings
Hot water GT3
Set 51,0° Now 50,0°
Return
Temperature readings
Shunt, flow GT4
Tgt 40,3° Now 43,0°
Return
Temperature readings
Room GT5
Tgt 20,0° Now 19,5°
Return
Temperature readings
Compressor GT6
90,0°
Return
Temperature readings
Heat trfluid out GT8
45,0°
Return
Temperature readings
Heat tr fluid in GT9
40,3°
Return
Temperature readings
Ht trfld(coll)inGT10
0,0°
Return
Temperature readings
Httrfld(coll)outGT11
-4,0°
Return