Danfoss DHP-S Eco, DHP-S 7Ua User Manual

User manual

DHP-S&DP

VUIFM102

If these instructions are not followed during
installation and service, Danfoss A/Sliability
according to the applicable warranty is not
binding. Danfoss A/S retains the right to
make changes to components and specifi­cations without prior notice.

© 2010 Copyright Danfoss A/S.
The Swedish language is used for the original

instructions. Other languages are a transla­tion of original instructions.
(Directive 2006/42/EG)

Contents

1 Important information......................................................................................................................... 3

1.1 Safety precautions

................................................................................................................................... 4

1.2 Protection.................................................................................................................................................... 5

2 About your heat pump........................................................................................................................ 6

2.1 Product description................................................................................................................................. 6

2.2 The principles of the heat pump........................................................................................................ 6

2.3 Hot water tank (option).......................................................................................................................... 8

2.4 Room sensor (option)............................................................................................................................. 8

3 Operating instructions......................................................................................................................... 9

3.1 Control panel............................................................................................................................................. 9

3.2 Checking the coolant circuit pressure............................................................................................ 14

3.3 Checking the water level in the heating system........................................................................ 15

3.4 Checking safety valves......................................................................................................................... 15

3.5 In the event of leakage......................................................................................................................... 16

4 Menu information............................................................................................................................... 17

4.1 INFORMATION menu............................................................................................................................ 17

5 Troubleshooting.................................................................................................................................. 25

5.1 Alarm.......................................................................................................................................................... 25

6 Terms and abbreviations.................................................................................................................. 26

7 References............................................................................................................................................. 28

VUIFM102 – 1

1 Important information

Note! If the installation is not used during the winter, the heating
system must be drained of water, otherwise there is a risk of frost
damage to the installation.

The system can be considered maintenance free but certain checks are
necessary.

Before changing the control computer’s settings, first find out what these
changes mean.

Contact your installer for any service work.

Caution! This apparatus is not intended for persons (including
children) with reduced physical, sensory or psychological
capacity, or who do not have knowledge or experience, unless
supervised or they have received instructions on how the
apparatus functions from a safety qualified person.

Note! Children are not permitted to play with the apparatus.

User manual VUIFM102 – 3

1.1 Safety precautions

1.1.1 Installation and maintenance

DANGER! Only authorized installers may install, operate and

carry out maintenance and repair work on the heat pump.

DANGER! Only authorized electricians may modify the electrical
installation.

DANGER! DANGER TO LIFE! Only authorized refrigeration
technicians may work on the refrigerant circuit.

1.1.2 System modifications

Only authorized installers may carry out modifications on the following
components:

•

The heat pump unit

•

The pipes for the refrigerant, brine, water and power

•

The safety valve

Do not carry out construction installations that may affect the operational
safety of the heat pump.

1.1.3 Safety valve

The following safety precautions apply to the hot water circuit’s safety
valve with corresponding overflow pipe:

•

Never block the connection to the safety valve’s overflow pipe.

•

Water expands when it is heated, this means that a small amount of
water is released from the system via the overflow pipe. The water
that exits the overflow pipe can be hot! Therefore, allow it to flow to
a floor drain where there is no risk of burning yourself.

4 – User manual

VUIFM102

1.2 Protection

1.2.1 Corrosion Protection

Due to the risk of corrosion, avoid using different types of sprays in the
vicinity of the heat pump. This particularly applies to:

•

Solvents

•

Chlorinated cleaning agents

•

Paints

•

Adhesives

User manual VUIFM102 – 5

2 About your heat pump

2.1 Product description

The heat pump is a heating system for heating and hot water if an external
water heater is installed (accessory). It has a compressor developed solely
for heat pumps.

The heat pump is equipped with control equipment which is presented
in a graphical display. The control equipment is also prepared for moni­toring via the internet.

Heat enters the house via a water borne heating system. The heat pump
supplies as much of the heat demand as possible before auxiliary heating
is engaged and assists. Additional heater is an accessory.

The heat pump heating system consists of two basic units:

•

Heat pump unit

•

Control equipment

The heat pump unit consists of the following components:

•

Scroll compressor

•

Stainless steel heat exchanger: condenser, evaporator and de-super­heater

•

Circulation pumps for collector- and heating system

The control equipment controls the components included in the heating
installation (compressor, circulation pumps and exchange valve) and
determines when to start and stop the pump as well as producing heat
for the house or hot water. If the additional heat (accessory) is installed
the additional heating is controlled by the control equipment. The control
equipment unit consists of the following components:

•

Control computer, as well as operator’s panel with graphical display

•

Temperature sensors (outdoor, supply line, return line and hot water)

•

Room sensor (option)

2.2 The principles of the heat pump

A heat pump utilises the energy found in a natural heat source. Simply
put, it obtains energy in the form of heat from a heat source.

6 – User manual VUIFM102

The heat pump is, therefore, a very environmentally friendly and eco­nomical way of heating a house.

5

4

7

1

2

3

6

8

Figure 1. The principles of the heat pump

The heat pump has four separate fluid circuits

•

Brine circuit (1) – is a fluid (brine) filled hose lowered into a lake, buried
in the ground or lowered into bedrock. The brine obtains energy from
the surroundings by the fluid temperature in the hose being heated
a few degrees.

•

Refrigerant circuit (7) – is a circuit in the heat pump that through
evaporation, compression and condensation takes energy from the
brine circuit and supplies it to the heat transfer fluid circuit. The refrig­erant is chlorine free.

User manual VUIFM102 – 7

•

Heat transfer fluid circuit (8) – is the water that transports the heat/
energy to the heating system and the hot water tank.

•

Hot gas circuit – is a high temperature circuit for the hot water circuit’s
final heater. If the heat pump is not connected to any water heaters,
the hot gas circuit does not need to be connected.

1. The brine circuit (1) evaporates the refrigerant in the evaporator
(2), using heat from lake, ground or rock. The refrigerant is turned
to gas.

2. The refrigerant passes the compressor (3) where the pressure and
temperature are raised.

3. The refrigerant then continues to the de-superheater (4). Here a
small high temperature output is used, for example, to top up the
hot water temperature.

4. The heat transfer fluid circuit (hot gas circuit) condenses refrigerant
to liquid form in the condensor (5), by giving off heat to the house
and hot water.

5. The refrigerant then passes through the expansion valve (6) where
the pressure and temperature drop and converts the refrigerant
from liquid to liquid and gas. The process then starts again.

2.3

Hot water tank (option)

The heat pump can also produce hot water for an external water heater.
The water temperature of the hot water tank is controlled by the control
switch and cannot be adjusted.

Hot water production stops when the control switch reaches its maximum
operating pressure.

2.4 Room sensor (option)

The heat pump system can be equipped with a room sensor as an option.
Only authorised electricians may carry out the installation.
See wiring diagram for connections.

8 – User manual

VUIFM102

3 Operating instructions

3.1 Control panel

3.1.1 Function description

The heat pump has an integrated control system which automatically cal­culates the heat demand in the house to ensure that the correct amount
of heat is produced and emitted where necessary. There are many differ­ent values (parameters), which are required in order to do the calculation
of the heat demand.

During installation and service, the control panel is used to set and change
values that have to be adapted according to the house demand. The con­trol panel is integrated into the front of the heat pump and consists of a
display, a keypad and an indicator. In the display, a simple menu system
is used to navigate the desired settings and values. During operation, the

User manual VUIFM102

– 9

display always shows the set ROOM value, the operating mode and the
status of the heat pump.

3

2

1

ROOM

NO HEAT DEMAND
OPERAT. AUTO

20°C

(20°C)

Figure 2. Display, keypad and indicator.

Position Description

1 The display text and symbols are only shown as examples. Certain

symbols cannot be displayed at the same time.

2 Keypad:

+ Plus sign used to scroll up a menu or increase the values.

- Minus sign used to scroll down a menu or reduce the values.
> Right arrow used to select a value or open a menu.
< Left arrow to cancel selection or exit a menu.

3 Indicator

The control system is operated via a user-friendly menu system, which is
shown in the display. Use the keypad’s four navigation symbols to navi­gate the menus and increase or reduce the set values.

The INFORMATION menu is opened by pressing the left or right buttons.
The INFORMATION menu has a number of sub menus, see Menyinforma­tion.

10 – User manual VUIFM102

For installation and service, the SERVICE menu is used, which is opened
by pressing the left button for five seconds. The SERVICE menu has a
number of sub menus, see Menu information.

The INFORMATION and SERVICE menus are intended for two categories
of user, customers and installers. Customers may only open the INFOR­MATION menu with a limited number of settings. Installers have to be able
to change many settings in the control settings. The SERVICE menu is
therefore hidden from the customers.

1

2

Figure 3. The menus are reached by pressing different buttons.

Position Description

1 Information menu

Press the left or right buttons.

2 Service menu

Press and hold the left button for at least five seconds

The indicator at the bottom of the control panel has three modes:

•

Not lit, means that the heat pump is not powered.

•

When the light shines continuously, the heat pump has power and is
ready to produce heat or hot water.

•

Flashing, means an active alarm

Caution! During a service that consists of replacing the display
card, all heat pump settings are reset to factory settings.
Therefore note current settings before replacement.

User manual VUIFM102 – 11

3.1.2 Display

The display shows information about the heat pump’s operation, status
and any alarms, in text form. Operating mode and status, indicated by
symbols, are also shown in the lower part which shows the heat pump’s
active processes.

Note! To change the display language, press the following
sequence of buttons: right arrow, arrow down to bottom menu,
arrow right, scroll between languages using + or -. Then select
language using right arrow.

3.1.2.1 Operating modes

Table 1. Shows the set operating mode of the heat pump.

Operating
mode

Meaning

(OFF)

The installation is fully switched off. This mode is also used
to acknowledge certain alarms.

Caution! If the operating mode OFF is to be
used for long periods during the winter, the
water in the heating system in the heating
system must be drained, otherwise there is a
risk of frost damage.

AUTO The heat pump and the auxiliary heater are automatically

controlled by the control system.

HEAT PUMP The control system is controlled so that only the heat pump

unit (compressor) is allowed to operate. In this operating
mode peak heating charging (anti-legionella function) of
the hot water will not run because the auxiliary heater is not
used.

12 – User manual VUIFM102

Operating
mode

Meaning

AUX. HEATER The control system only permits the auxiliary heater to be

in operation.

HOT WATER In this mode the heat pump only produces hot water, no

heat goes to the heating system.

3.1.2.2 Symbols

Table 2. Symbols shown in the display.

Symbol Meaning

HP Indicates that the compressor is in operation.

1

LIGHT
NING

Indicates that the auxiliary heater is in operation. The number
indicates what additional step is activated.

HOUSEIndicates that the heat pump produces heat for the heating sys-

tem.

TAP Indicates that the heat pump produces heat for the water heater.

F FLOW

SEN­SOR

An F indicates that a flow sensor is installed.

CLOCKIndicates that tariff control is active.

TANK Indicates the level of hot water in the water heater. When hot

water is produced for the water heater, this is indicated by a
flashing icon for the tank. A lightning symbol by the symbol
indicates peak heating charging (anti-legionella function).

SQUAREEither indicates that the operating pressure switch has deployed,

or that the pressure pipe temperature has reached its maximum
temperature.

User manual VUIFM102 – 13

3.1.2.3 Operational information

Table 3. Shows information about the heat pump.

Message Meaning

ROOM Shows the set ROOM value. Standard value: 20°C.

If the accessory room sensor is installed it shows the
actual temperature and the desired indoor temperature
is shown within brackets.

START Indicates that there is a need for heat production and that

the heat pump will start.

EVU STOP Indicates that the additional function EVU is active. This

means that the heat pump is off as long as EVU is active.

NO HEAT DEMAND Indicates that there is no heating production demand.

HEAT PUMP START --XXIndicates that there is a heating production demand and

will start in XX number of minutes.

HEAT PUMP+AUX.
HEAT

Indicates that heat production is active with both com­pressor and auxiliary heater.

AUX. HEATER Indicates that there is an auxiliary heater demand.

3.2 Checking the coolant circuit pressure

The brine circuit must be filled with the correct amount of fluid otherwise
the installation may become damaged.

Ensure that system has the necessary pressure, however, not above max­imum pressure of 6 bar.

14 – User manual VUIFM102

See the installation instructions when filling brine.

1

2

Figure 4. Filling the brine
system

Symbol explanation

1 Used when filling
2 Connected to brine circuit

3.3 Checking the water level in the heating system

The line pressure of the installation must be checked once a month. Ensure
that heating system has the necessary pressure, however, not above max­imum pressure of 6 bar.

You can use normal tap water when topping up the heating system. In
certain exceptional cases the water quality may be so poor (for example
very hard water) that it is not suitable for filling the heating system. If
unsure, contact your installer.

Do not use any additives for water treatment in the heating system’s water!

3.4 Checking safety valves

Both the safety valves for the heating system must be checked at least
four times a year to prevent lime deposits clogging the mechanism.

The safety valve of the water tank protects the enclosed heater against
over pressure in the water tank. It is mounted on the cold water inlet line,
its outlet opening facing downwards. If the safety valve is not checked

User manual VUIFM102 – 15

regularly, the water tank might be damaged. It is quite normal that the
safety valve lets out small amounts of water when the water tank is being
charged, especially if a lot of hot water was used previously.

Both safety valves can be checked by turning the cap a quarter of a turn
clockwise until the valve lets out some water through the overflow pipe.

If a safety valve does not work properly, it must be replaced. Contact your
installer.

The opening pressure of the safety valves is not adjustable.

3.5 In the event of leakage

In the event of leakage in the hot water pipes between the unit and water
taps, close the shut-off valve on the cold water inlet immediately. Contact
your installer, see References, Page 28.

In the event of leakage in the brine circuit, turn off the heat pump and call
your installer immediately, see References, Page 28.

16 – User manual VUIFM102

4 Menu information

4.1 INFORMATION menu

Open the menu by pressing the left or right button. The menu also shows
history and operating times.

Menus in italics are only visible if the expansion card (accessory) is instal­led.

Table 4. Used to change the heat pump's operating modes and to adjust
the heat curve.

Menu Sub menu Sub menu Sub menu

INFORMATION

OPERAT.

Ø CANCEL

Ø

AUTO
HEAT PUMP
AUX. HEATER (must
be activated)
HOT WATER (must be
activated)
MANUAL TEST

HEAT CURVE

CURVE
MIN
MAX
CURVE 5
CURVE 0
CURVE -5
HEAT STOP
REDUCTION
TANK TEMP (if buffer tank is activated)
OVERCHARGE (if buffer tank is activated)
ROOM FACTOR (if a room sensor is installed)

POOL (expansion card)
POOL HYSTERESIS (expansion card)

HEAT CURVE 2 (if shunt group is activated)

User manual VUIFM102 – 17

Menu Sub menu Sub menu Sub menu

CURVE
MIN
MAX

TEMPERATURE

OUTDOOR
ROOM (if a room sensor is installed)
SYSTEM SUPPLY (if buffer tank is activated)
SUPPLY LINE
RETURN LINE
BUFFER TANK (must be activated)
HOT WATER (must be activated)
INTEGRAL
BRINE IN
BRINE OUT

POOL (expansion card)

COOLING
SHUNT GROUP (must be activated)
2ND HEAT CIR.

CURRENT (expansion card)

OPERAT. TIME

HEAT PUMP
AUX. HEAT 1
AUX. HEAT 2
AUX. HEAT 3
HOT WATER (must be activated)
COOLING
ACT COOLING

LANGUAGE

SVENSKA
ENGLISH
DEUTSCH
NEDERLANDS
FRANÇIS
ESPAÑOL
ITALIANO
NORSK
DANSK
SUOMI
EESTI
POLSKI
ČEŠTINA

18 – User manual VUIFM102

4.1.1 Sub-menu OPERAT.

Table 5. Used to select operating mode.

Menu
selection

Meaning Factory

setting

(OFF)

The installation is fully switched off. This mode is
also used to acknowledge certain alarms.

CANCEL = starting point, no changes made.
To select OFF as operating mode, press the minus

sign once to scroll down one step and press the
right arrow once.

-

AUTO

Automatic operation with both heat pump and
auxiliary heater permitted. If the number of power
stages for auxiliary heating are set to zero (SERVICE

-> AUX. HEATER -> MAX STEP) only AUTO or OFF
can be selected as operating mode.

-

HEAT PUMP

Operation with only heat pump permitted.

Note! No peak heating charging
(anti-legionella function) with only
heat pump operation.

-

AUX.
HEATER

Operation with only auxiliary heater permitted. -

HOT WATER

Operation with heat pump for hot water produc­tion and auxiliary heater during peak heating
charging (anti-legionella function).

-

MANUAL
TEST

Only displayed when the value for MANUAL TEST
is set to 2 in
The SERVICE menu. Outputs that control compo­nents are activated manually.

-

User manual VUIFM102– 19

4.1.2 Sub-menu HEAT CURVE

Table 6. Used to change settings for the heat curve.

Menu
selection

Meaning Factory

setting

CURVE

Calculated supply temperature at 0°C outdoor
temperature. Shown as a graphic curve. The curve
will be limited by the set values of MIN and MAX.

40°C
(for under
floor heating
30°C)
(range:
22°C / 56°C)

MIN

Minimum permitted supply temperature, if the
temperature for heat stop has been reached and
the heat pump has stopped.

10°C
(range:
10°C / 50°C)

MAX

Maximum calculated setpoint value of the supply
temperature.

55°C
(for under
floor heating
45°C)
(range:
40°C / 85°C)

CURVE 5

Local increase or reduction of CURVE at an outdoor
temperature of +5°C. Shown in the graph for
CURVE.

0°C
(range: -5°C /
5°C)

CURVE 0

Local increase or reduction of CURVE at an outdoor
temperature of 0°C. Shown in the graph for CURVE.

0°C
(range: -5°C /
5°C)

CURVE -5

Local increase or reduction of CURVE at an outdoor
temperature of -5°C. Shown in the graph for
CURVE.

0°C (range:

-5°C / 5°C)

HEAT STOP

Maximum outdoor temperature when heat pro­duction is permitted.

If the heat stop has been activated the outdoor
temperature must drop 3°C below this setting
before the heat pump resumes the heating cycle.

17°C
(range: 0°C /
40°C)

REDUCTION

Only appears if the tariff control function has been
activated. Lowering set room temperature. Active
when a 10 kΩ connection is placed across the EVU
input connections.

2°C
(range: 1°C /
10°C)

20 – User manual VUIFM102

Menu
selection

Meaning Factory

setting

TANK TEMP

Displayed if buffer tank is active. Charges the buf­fer tank to the set temperature. AUTO setting
charges the tank to the supply line setpoint value.

AUTO
(range:
30°C / 55°C)

OVER­CHARGE

Displayed if the buffer tank is active and TANK
TEMP is set to AUTO. Charges the buffer tank to
supply line setpoint value + the value of OVER­CHARGE.

0°C
(range: 0°C /
5°C)

ROOM FAC­TOR

Only displayed if an accessory Room temperature
sensor is installed.

Determines how great an impact the room tem­perature is to have when calculating the supply
temperature. For under floor heating it is recom­mended that ROOM FACTOR is set to 1, 2 or 3. For
radiator heating it is recommended that ROOM
FACTOR is set to 2, 3 or 4.

2
(range: 0 / 4)
(0 = no
impact,
4 = very large
impact)

POOL
(Expansion
card)

Only appears if POOL is selected. The temperature
in the pool is controlled by a separate sensor
regardless of the heating and hot water system.

20°C
(range: 5°C /
40°C)

POOL HYSTE­RESIS (Expan­sion card)

Only appears if POOL is selected. The difference
between the desired charge value (adjustable) and
actual value to the pool sensor. Pool hysteresis
does not affect the integral value.

0°C
(range: 5°C /
40°C)

User manual VUIFM102 – 21

4.1.3 Sub menu HEAT CURVE 2

Only appears if shunt group sensor is connected and activated in menu
SERVICE -> INSTALLATION -> SYSTEM -> SHUNT GROUP.

Table 7. Used to change settings for heat curve 2.

Menu
selection

Meaning Factory

setting

CURVE 2

Calculated shunt group temperature at 0°C out­door temperature. Shown as a graphic curve. The
curve will be limited by the set values of MIN and
MAX.

40°C
(range:
22°C / 56°C)

MIN

Minimum permitted shunt group temperature, if
the temperature for heat stop has not been
reached.

10°C
(range:
10°C / 50°C)

MAX

Maximum permitted shunt group temperature. 55°C

(range:
15°C / 70°C)

4.1.4 Sub-menu TEMPERATURE

The history of different temperature measurements can be viewed by
pressing the right arrow key. The graph shows the last 60 measurement
points for the set time interval (SERVICE -> INSTALLATION -> LOG TIME).
In the event of an alarm, history stops being logged until the alarm is reset
by changing the operating mode to OFF.

Table 8. Used to indicate the prevailing temperatures, history and set/cal­culated values.

Menu
selection

Meaning Factory set-

ting

OUTD

Shows the actual outdoor temperature. -

ROOM

Shows the actual set temperature. -

SYSTEM
SUPPLY

Displays system supply temperature at the buffer
tank system.

-

22 – User manual VUIFM102

Menu
selection

Meaning Factory set-

ting

SUPPLY
LINE

Shows the actual supply temperature. The calcu­lated supply temperature to the heating system
group is within brackets.

During hot water production in operating mode
AUX. HEATER the value for HOT WATER STOP + 10°
is shown within brackets.

-

RETURN
LINE

Shows the actual return temperature. The stop
temperature, MAX RETURN is within brackets.

-

BUFFER
TANK

Indicates the buffer tank temperature. -

HOT WATER

Shows the actual hot water temperature. -

INTEGRAL

Shows the actual calculated value for integral. -

REFR 1

Shows the actual temperature of refrigerant sen­sor 1.

-

REFR 2

Shows the actual temperature of refrigerant sen­sor 2.

-

POOL
(Expansion
card)

Only appears if POOL is selected. Shows the actual
pool temperature.
The set pool temperature is shown in brackets.

-

SHUNT
GROUP

Only appears if SHUNT GROUP is selected. Shows
the actual supply temperature. The calculated
supply temperature to the shunt group is within
brackets.

-

2ND HEAT
CIR.

Shows the temperature of the second heating cir­cuit if installed by the buffer tank system.

CURRENT
(Expansion
card)

Only appears if CURRENT LIMITER is selected.
Shows the actual current consumption. The set
value for MAX CURRENT is shown between brack­ets.

-

User manual VUIFM102 – 23

4.1.5 Sub-menu OPERAT.TIME

Table 9. Used to show the operating time for each component. Time given
in hours.

Menu
selection

Meaning Factory

setting

HEAT PUMP

Compressor operating time for both heating and
hot water production.

-

AUX. HEATER Operating time of auxiliary heater. -

HOT WATER Operating time for hot water with compressor. -

4.1.6 Sub-menu LANGUAGE

Table 10. Used to set the language of the menu system.

Menu selection

SVENSKA

ENGLISH

DEUTSCH

NEDERLANDS

FRANÇAIS

ESPAÑOL

ITALIANO

NORSK

DANSK

SUOMI

EESTI

POLSKI

ČEŠTINA

24 – User manual VUIFM102

5 Troubleshooting

5.1 Alarm

In event of alarm this is indicated in the display with the text ALARM and
an alarm message, see following table. For alarms that are not reset auto­matically acknowledgement is required. Acknowledge the alarm by set­ting the heat pump to operating mode OFF.

Message Meaning

HIGH PRESSURE
ERROR

Tripped high pressure switch. Compressor stopped.

LOW PRESSURE
ERROR

Tripped low pressure switch. Compressor stopped.

MOTOR P ERROR Deployed overload relay (Overcurrent relay compressor),

or deployed overload relay for outdoor unit fan. Com­pressor stopped.

OUTDOOR SENSOR Fault in outside sensor. When the control system calcu-

lates the heat demand, zero degrees is used.

SUPPLY LINE SEN­SOR

Supply line sensor error. Everything stops except the
heating system’s circulation pump.

RETURN LINE SEN­SOR

Return sensor fault. Return temperature = Supply line – 5
is used. Calculated supply temperature limited to maxi­mum 45°C.

HOT WATER SENSOR Fault on sensor for start temperature. No hot water pro-

duction.

ERR PHASE SEQ. Alarm that indicates that there is an incorrect phase

sequence to the compressor. Only display and only the
first 10 minutes.

HIGH RETURN Alarm that indicates that high return temperature pre-

vents the compressor’s operation.

BRINEFLOW LOW The flow sensor produces an alarm when the ambient

temperature of the brine circuit becomes too low.

In event of alarm the heat pump will if possible supply heating to the
house, primarily with the compressor, secondarily with the additional
heater. Hot water will stop to indicate that something noteworthy has
occurred.

User manual VUIFM102 – 25

6 Terms and abbreviations

Table 11. Terms and abbreviations

Term Explanation

Evaporator In the evaporator, energy is retreived from the heat source

and the refrigerant passing through the evaporator turns
to gas.

De-superheater In the de-superheater part of the total heating output is

released (approx. 15%). A higher temperature than the
normal condensation temperature can found here.

Integral INTEGRAL is the heating system’s energy balance. Heat

generation is controlled by a calculated requirement. This
value is determined by comparing the actual supply tem­perature with its calculated supply temperature. The dif­ference between the temperatures is added over time.
The resulting value is referred to as the integral. The inte­gral is calculated automatically. The value of the integral
can be viewed in the display under the sub-menu TEM­PERATURE.

Compressor The compressor raises the temperature and pressure of

the refrigerant.

Condenser In the condenser, the refrigerant supplies its heat energy

to the heat transfer fluid circuit.

Curve The CURVE value is set via the display. The set value is the

calculated set point value of the flow line at outdoor tem­perature of 0°C.

Brine Is a water based mixture that transports energy from the

heat source to the heat pump.

Brine circuit The fluid circuit transports energy from the heat source to

the heat pump.

Refrigerant circuit Is the circuit in the heat pump that through evaporation,

compression and condensation takes energy from the
brine circuit and supplies it to the heat transfer fluid circuit.

Refrigerant Is the fluid that transports heat from the brine circuit and

supplies it to the heat transfer fluid circuit.

Radiator Heater element, element.

26 – User manual VUIFM102

Term Explanation

Control computer The control computer controls the entire heating instal-

lation. All settings are stored and the history of the instal­lation is registered here. The control computer’s settings
can be changed via the display.

Room If ROOM shows 20°C the heat curve is unaffected. If ROOM

shows higher or lower, this indicates that the heat curve
has been adjusted up or down to change the indoor tem­perature.

Heat transfer fluid
circuit

The heat transfer fluid circuit obtains heat/energy from
the refrigerant circuit, which it then transports to the
water tank or heating system.

Heat curve The control computer determines the correct tempera-

ture of the water to be distributed to the heating system
based on the heat curve. The indoor temperature is adjus­ted by changing the gradient of the heating system’s
CURVE.

User manual VUIFM102 – 27

7 References

Piping installation

Date ........................................................

Company ........................................................

Name ........................................................

Tel. No. ........................................................

Electrical Installation

Date ........................................................

Company ........................................................

Name ........................................................

Tel. No. ........................................................

System adjustment

Date ........................................................

Company ........................................................

Name ........................................................

28 – User manual VUIFM102

System adjustment

Tel. No. ........................................................

User manual VUIFM102 – 29

VUIFM102