Thermia Atria User manual

User manual
Atria
Atria Duo
Atria Duo Optimum
Atria Optimum
Comfort
Diplomat
Diplomat Duo
Diplomat Duo Optimum
Diplomat Duo Optimum G2
Diplomat Optimum
Diplomat Optimum G2
086U6297 Rev. 6 EN

If these instructions are not followed during
installation and service, Thermia Värme
ABliability according to the applicable war‐
ranty is not binding. Thermia Värme AB
retains the right to make changes to com‐
ponents and specifications without prior
notice.
© 2010 Copyright Thermia Värme AB.
The Swedish language is used for the orig‐
inal 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 Principles of function.................................................................................... 6
2.2 Components................................................................................................. 7
2.3 Outdoor and defroster function..................................................................... 10
2.4 Passive cooling function.............................................................................. 12
2.5 Speed (rpm) control.................................................................................... 12
2.6 HGW technology........................................................................................ 12
2.7 Auxiliary heat............................................................................................. 13
2.8 Water heater.............................................................................................. 14
3 Control computer...................................................................................... 17
3.1 Control system........................................................................................... 17
3.2 Display...................................................................................................... 19
4 Trimming the heating system...................................................................... 23
5 Instructions.............................................................................................. 25
5.1 Setting operating mode................................................................................ 25
5.2 Setting ROOM values.................................................................................. 25
5.3 Adjusting CURVE values.............................................................................. 26
5.4 Adjusting a specific part of the heat curve...................................................... 26
5.5 Setting MIN and MAX values........................................................................ 26
5.6 Setting HEATSTOP..................................................................................... 27
5.7 Reading off temperatures............................................................................. 27
5.8 Calculating energy consumption................................................................... 28
5.9 Manual defrost, outdoor unit........................................................................ 33
6 Regular checks......................................................................................... 34
6.1 Checking operation..................................................................................... 34
6.2 Checking the brine level.............................................................................. 34
6.3 Checking the water level in the heating system.............................................. 35
6.4 Checking the safety valve............................................................................ 36
6.5 In the event of leakage................................................................................ 36
6.6 Cleaning the strainer for the heating system................................................... 37
6.7 Cleaning the strainer for the brine circuit....................................................... 38
7 Accessories............................................................................................... 39
086U6297 Rev. 6 EN – 1

7.1 Room sensor.............................................................................................. 39
8 Troubleshooting........................................................................................ 41
8.1 Alarm........................................................................................................ 41
9 Terms and abbreviations............................................................................ 43
10 Default setting in the control computer....................................................... 45
11 References............................................................................................. 46
11.1 Check list................................................................................................ 46
11.2 Installation carried out by:......................................................................... 47
2 – 086U6297 Rev. 6 EN

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 086U6297 Rev. 6 EN – 3

1.1 Safety precautions
1.1.1 Installation och underhåll
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 Förändringar av systemet
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 Säkerhetsventil
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 086U6297 Rev. 6 EN

1.2 Protection
1.2.1 Korrosionsskydd
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 086U6297 Rev. 6 EN – 5

2 About your heat pump
2.1 Principles of function
A heat pump utilises the free energy from the sun and that is also found
in a natural heat source, such as rock, ground, ground water or air. The
heat pump can be compared to a reversed refrigerator; in a refrigerator
heat is transferred from the inside of the refrigerator to the outside,
whereas in a heat pump, the solar energy that is stored in a heat source
is transferred to the inside of the house. The heat pump uses the solar
energy in the heat source and gives back two to three times more heat
energy than it uses in electrical energy. The heat pump is, therefore, a
very environmentally friendly and economical way of heating a house.
Figure 1. The relationship between consumed electrical energy and
free solar energy
In order for the heat pump to be able to retrieve heating energy from the
heat source and transfer it to the heating system of the house, three
6 – User manual 086U6297 Rev. 6 EN

separate fluid circuits are required. The figure below shows the different
circuits and how they work together in the transfer of heat energy.
1
2
3
4
B
C
A
A fluid (brine) (A) filled hose is lowered
into a lake, buried in the ground or low‐
ered into bedrock. The cold brine
obtains energy from the heat source by
the fluid temperature in the hose being
heated a few degrees by the surround‐
ing heat source. The fluid filled hose is
also known as a collector. The heated
brine (A) is routed into the heat pump's
evaporator (1) and heats the enclosed
refrigerant (B). The heat in the
enclosed refrigerant in the refrigerant
circuit (B) is increased due to a pres‐
sure increase in the compressor (2).
The extremely hot refrigerant, which is
now in a gaseous state, continues into
the condenser. The heating system
transports the heat energy out to the
water heater, radiators or the under
floor heating system, which indirectly
heat up the house (3). Here, the refrig‐
erant is cooled and releases its heat
energy to the heating system. The
refrigerant’s temperature decreases
and condenses back to a liquid state.
The refrigerant is then transported
through the expansion valve (4) where
the pressure drops and the refrigerant
starts to boil and then the process
starts again.
2.2 Components
The heat pump is a complete heat pump installation for heating and hot
water. It has an integrated hot water tank and auxiliary heater. Using
the TWS (Tap Water Stratificator) technique, more effective heat transfer
and efficient layering of the water in the water heater is achieved.
The heat pump is equipped with control equipment, which is operated
via a control panel.
User manual 086U6297 Rev. 6 EN – 7

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.
8 – User manual 086U6297 Rev. 6 EN

The heat pump unit consists of five basic units:
3
4
5
1
2
Symbol explanation
1 Heat pump unit
•Compressor
•Stainless steel heat exchanger
•Circulation pumps for brine and
heating systems
•Valves and safety equipment for
cooling systems and corresponding
electrical components.
2 Water heater
•Internal anti-corrosion protection
with copper or made completely of
stainless steel
•It has an anode that normally does
not require replacing, which means
that it is maintenance-free
3 Exchange valve or shunt valve
•The heated water either passes
through to the heating system or to
the water heater depending on
whether heating or hot water is to be
produced
User manual 086U6297 Rev. 6 EN – 9

Symbol explanation
4 Auxiliary heat
•Immersion heater installed on the
heating system’s supply line
•Covers the demand of extra energy if
the heat pump’s capacity is excee‐
ded
•Automatically connected if operating
mode AUTO is selected.
5 Control equipment
•Control panel
•Temperature sensors (outdoor, sup‐
ply line, return line, brine and hot
water)
•Room sensor (option)
The control equipment controls the heat pup unit’s included components
(compressor, circulation pumps, auxiliary heaters and exchange valve)
and determines when to start and stop the pump as well as producing
heat for the house or hot water.
2.3 Outdoor and defroster function
Atria models are equipped with an outdoor unit that uses air as a heat
source down to -20°C. The outdoor unit has a coil where brine recovers
free energy from the outside air. It also has a fan that increases the
airflow through the coil. During operation the coil is cooled by the energy
exchange at the same time as the humidity causes it to become covered
in frost.Atria models have an automatic function to defrost the coil using
the produced heat energy. If necessary, a defrosting sequence starts
which means the following:
•The defrosting sequence starts when the temperature of the brine
reaches its set parameter for defrosting.
•The compressor is stopped so that the defrosting sequence should
not load the compressor unnecessarily. On the other hand the com‐
pressor is not stopped when it produces hot water because the water
heater is cooled when defrosting. The fan on the outdoor unit is
10 – User manual 086U6297 Rev. 6 EN

stopped in conjunction with defrosting to shorten the time of defrost‐
ing.
•The shunt valve in the heat pump opens so that hot brine from the
defrosting tank is mixed with the cold brine circulating to the outdoor
unit. The mixture has a temperature of about 15°C.
•The fifteen degree heated brine melts the frost on the outside of the
coil at the same time as the liquid is cooled.
•When the brine is no longer cooled to temperatures below 11°C the
coil is sufficiently defrosted.
•The shunt valve closes the flow of hot brine from the defrosting tank.
•Operation returns to normal.
The unit (Atria models) consists of the following basic components:
1
3
2
Figure 2. The figure
shows Atria Duo,
equipped with a sepa‐
rate water heater
1 Heat pump unit
•Compressor
•Stainless steel heat exchanger
•Circulation pumps for brine and heat‐
ing systems
•Valves and safety equipment for cool‐
ing systems and corresponding elec‐
trical components.
2 Water heater
•Internal anti-corrosion protection
with copper or made completely of
stainless steel
•It has an anode that normally does
not require replacing, which means
that it is maintenance-free
•Defrosting tank containing heated
brine for defrosting the outdoor unit
3 Outdoor unit
•Heat exchanger
•Fan
User manual 086U6297 Rev. 6 EN – 11

2.4 Passive cooling function
Note! Not sold on all markets.
Heat pump Comfort is equipped with an extra heat exchanger to use the
passive cooling effect from the brine. Because the temperature in the
collector (borehole or equivalent) is lower than the indoor temperature,
the temperature difference can be exploited to cool the radiator circuit.
At the same time the collector is charged with energy before the cold
periods of the year.
Comfort is a complete installation for heating, hot water and passive
cooling where the control automatically ensures that the desired indoor
climate is reached. Because Comfort uses the same pipe system for
heating and cooling, it is important to use a temperature that does not
cause condensation on the pipe system when cooling. (If the system is
not adapted to it.) Use of fan convectors is recommended.
2.5 Speed (rpm) control
Applies from Optimum
A heat pump requires optimum conditions in the heating system and
brine circuit in order to be able to run as efficiently as possible. The
temperature difference between the heating system’s supply line and
return line must be constant between 7–10°C. For the brine circuit a
temperature difference of 3°C between supply and return line applies. If
the differences are greater or less, the heat pump is less efficient and
savings are lower.
A heat pump with speed controlled circulation pumps always ensures
that they retain the temperature differences. The control equipment
detects if the balance is in jeopardy and increases or decreases the speed
of the circulation pumps as necessary.
2.6 HGW technology
The HGW technique is a new and unique method for hot water heating,
which is used in Diplomat Optimum G2 and Diplomat Duo Optimum
G2.
At the same time as the water is heated to be distributed around the
house heating system, a small proportion flows via an extra de-super‐
12 – User manual 086U6297 Rev. 6 EN

heater, which heats the water before it enters the water heater. A shunt
valve controls the flow between hot water and heating system.
During heating production, the shunt ensures a certain flow over the de-
superheater to the water heater. The flow through the shunt is continu‐
ously regulated by the heat pump control by sending opening or closing
pulses to the shunt.
2.7 Auxiliary heat
Diplomat models, Comfort
If the heat demand is greater than the heat pump’s capacity, the auxiliary
heater engages automatically in operating mode AUTO. The auxiliary
heater is made up of an electric heating element on the supply pipe that
has two outputs, ADD.HEAT 1 and ADD.HEAT 2, and can be controlled
in three steps.
For three phase, 400V 3N, installations:
•Step 1 = ADD.HEAT 1 = 3 kW
•Step 2 = ADD.HEAT 2 = 6 kW
•Step 3 = AUX. HEAT 1 + AUX. HEAT 2 = 9 kW
For single phase, 230V 1N, installations (not Comfort)
•Step 1 = ADD.HEAT 1 = 1.5 kW
•Step 2 = ADD.HEAT 2 = 3 kW
•Step 3 = AUX. HEAT 1 + AUX. HEAT 2 = 4.5 kW
In the event of an alarm, the auxiliary heater engages automatically on
the condition that operating mode AUTO is selected and that at least
one additional step is permitted.
Atria models
The auxiliary heater for 400V 3N heat pumps is made up of an electric
heating element on the supply line that has three outputs, AUX. HEAT
1, AUX. HEAT 2 and AUX. HEAT 3, and can be controlled in five steps:
•Step 1 = ADD.HEAT 1 = 3 kW
•Step 2 = ADD.HEAT 2 = 6 kW
•Step 3 = AUX. HEAT 1 + AUX. HEAT 2 = 9 kW
•Step 4 = ADD.HEAT 2 + ADD.HEAT 3 = 12 kW (only connected
at switched off compressor)
User manual 086U6297 Rev. 6 EN – 13

•Step 5 = ADD.HEAT 1 + ADD.HEAT 2 + TILLSATS 3 = 15 kW
(only connected at switched off compressor)
•Step +4 = ADD.HEAT 2 + ADD.HEAT 3 = 12 kW (compressor
operation permitted)
•Step +5 = ADD.HEAT 1 + ADD.HEAT 2 + ADD.HEAT 3 = 15 kW
(compressor operation permitted)
The two power steps, step 4 and step 5, cannot be activated when the
compressor is running. There are further auxiliary heating steps: step +4
and step +5, which means that these additional steps can be activated
whilst the compressor is running. Step +4 and +5 must only be selected
on the condition that the building where the heat pump is installed has
a large heating demand and the building’s electric installation is suitable
for high current consumption.
The auxiliary heater for 230V 1N heat pumps is made up of an electric
heating element on the supply line that has two outputs, AUX. HEAT 1
and AUX. HEAT 2, and can be controlled in three steps:
•Step 1 = ADD.HEAT 1 = 1.5 kW
•Step 2 = ADD.HEAT 2 = 3 kW
•Step 3 = AUX. HEAT 1 + AUX. HEAT 2 = 4.5 kW
In the event of an alarm, the auxiliary heater engages automatically on
the condition that operating mode AUTO is selected and that at least
one additional step is permitted.
2.8 Water heater
Thermia heat pumps Diplomat, Diplomat Optimum, Diplomat Optimum
G2 and Comfort supplied with an integrated 180 litre water heater. They
14 – User manual 086U6297 Rev. 6 EN

are equipped with a TWS coil that means more effective heat transfer
and efficient layering of the water in the water heater.
1
2
3
4
5
7
8
6
Symbol explanation
1 Tap hot water
2 Peak temperature sensor
3 Water heater
4 TWS coil
5 Start temperature sensor
6 Supply line to TWS coil
7 Return line from TWS coil
8 Cold water line
Water heater for Diplomat mod‐
els, Comfort
Hot water production is prioritised ahead of heat production, i.e. no heat
is produced when there is a hot water demand at the same time.
The temperature of the hot water cannot be adjusted. Normally, hot
water production does not cease at a determined temperature but when
the compressor’s operating pressure switch reaches its maximum oper‐
ating pressure, which corresponds to a hot water temperature of approx‐
imately 50-55°C.
Using a regular time interval, the water in the water heater is given extra
heat by the integrated auxiliary heater to prevent the build up of bacteria
(anti-legionella function). The factory set time interval is seven days (can
be adjusted). When the anti-legionella function is active the heat pump
produces hot water until the temperature for the start temperature sensor
(5) has reached 60°C. If the heat pump cannot raise the temperature
sufficiently within 3.5 hours the control checks if there is any heating
requirement, before the anti-legionella function tries again.
In the control system’s TEMPERATURE menu, a number of measured
and calculated temperatures for the hot water and supply are displayed.
The current temperature for the peak temperature sensor (2) and the
temperature of the supply line during heating and hot water production
are displayed. The temperature of the supply line often exceeds the
User manual 086U6297 Rev. 6 EN – 15

maximum permitted hot water temperature, but usually during hot water
production.
The hot water heaters for Atria models differ from the other heat pumps
in that the function for defrosting the outdoor unit is different.
The only difference between an Atria/Atria Optimum and an Atria Duo/
Atria Duo Optimum is that the water heater is integrated in Atria/Atria
Optimum and a separate unit for Atria Duo/Atria Duo Optimum.
The integrated 180 litre hot water heater has a defrosting tank (mantle)
on the outside of the heater that contains heated brine (approx 47 litres)
which is used during defrosting.
1 6 7
8
2
3
4
5
Figure 3. Water heater with
defrosting tank
Symbol explanation
1 Tap hot water
2 Peak temperature sensor
3 Defrosting tank
4 Water heater
5 TWS coil
6 Cold water line
7 Supply line to TWS coil
8 Expansion outlet when outdoor
unit is positioned at high level
16 – User manual 086U6297 Rev. 6 EN

3 Control computer
3.1 Control system
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 consists of a display, a keypad and an indicator. In
the display, a simple menu system is used to navigate the desired set‐
User manual 086U6297 Rev. 6 EN – 17

tings and values. During operation, the 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 4. Display, keypad and indicator.
Position Description
1 The display text and symbols are only shown as examples. Cer‐
tain 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 used to adjust the following:
•Operation
•Heat curves
•Temperatures
18 – User manual 086U6297 Rev. 6 EN