Thermia ATEC Technical manual

Planning guide
Atec
www.thermia.com

Thermia Värmepumpar is not liable or bound by warranty if these
instructions are not adhered to during installation or service.
The English language is used for the original instructions.
Other languages are a translation of the original instructions.
(Directive 2006/42/EC)
© Copyright Thermia Värmepumpar

Table of Contents Table of Contents
1 Transport, unpacking and positioning .................................................. 4
1.1 Transporting heat pump ........................................................ 4
1.2 Unpacking heat pump .......................................................... 4
1.3 Positioning the heat pump ....................................................... 4
2The heat pump .................................................................. 8
2.1 Dimensions and connections ...................................................... 8
2.2 Sound levels ................................................................ 10
3 System example ................................................................. 11
3.1 System example Atec Total ....................................................... 11
4 Piping installation ................................................................ 14
4.1 Water volume in heating system ................................................... 14
4.2 Minimum flow in the heating system ................................................ 14
4.3 Noise and vibrations ........................................................... 14
4.4 Maximum distance between indoor and outdoor units ..................................... 15
5 Electrical Installation .............................................................. 16
5.1 Cable connection ............................................................. 16
5.2 Positioning outdoor sensors ...................................................... 17
6 Technical data .................................................................. 18
6.1 Atec ...................................................................... 18
7 Checklist ...................................................................... 21
Planning guide Atec
Thermia Värmepumpar VIIFB102 3

1 Transport, unpacking and positioning
1.1 Transporting heat pump
Caution The heat pump must always be transported and stored standing and in a dry environment. If the heat pump is
laid on the incorrect side it may become seriously damaged as the oil in the compressor can run out in the
pressure pipe and therefore prevent normal function.
Caution Always secure the heat pump so that it cannot tip over during transportation.
1.2 Unpacking heat pump
1. Check that there is no transport damage.
2. Remove the packaging and check that the delivery contains the following components.
Quantity Name
1 Heat pump
1 Control unit
1 Document set
1 Package (1 x shut-off valve with filter, 1 x outdoor sensor)
1.3 Positioning the heat pump
The location of the outdoor unit is chosen so that neither the own living environment or adjoining properties are exposed to noise inter-
ference.
The device is, to advantage, placed in an environment with lush trees and shrubs with grass surface. Large hard asphalt surfaces and
stone or brick walls around the heat pump should be avoided since they effectively reflect the sound.
Avoid locating the outdoor unit:
▪close to windows or walls to bedrooms etc.
▪facing nearby neighbours.
▪in an inner corner of the building. It gives a very large effect on the direction of sound propagation.
N
Maximum distance between outdoor and indoor units is 15 metres with a pipe diameter of 28 mm. Thinner
pipes decreases the distance.
N
Adhere to national regulations regarding noise interference.
Planning guide Atec
VIIFB102 Thermia Värmepumpar
4

1.3.1 Heat pump foundation
1. The heat pump must be positioned outdoors on a stable base that can take the total weight of the heat pump, see Technical data.
2. Secure all four mounting points on a stable base, for example a cast foundation.
100 mm
~900 mm
b
c
a
7
5
4
3
6
18
2
Measurements 6-9 kW 11-13 kW 16-18 kW
1 450 mm 470 mm 710 mm
2 424 mm 480 mm 480 mm
3 618 mm 672 mm 857 mm
4 130 mm 190 mm 145 mm
5 61 mm 65 mm 65 mm
6 ~1,000 mm ~1,200 mm ~1300 mm
7 ~650 mm ~720 mm ~720 mm
8 Ø 65 mm Ø 65 mm Ø 65 mm
Position Description
a Drainage hole
b Foundation
c Gravel
Bolt size
6-9 kW 11-13 kW 16-18 kW
M10 (4x) M12 (4x) M12 (4x)
Caution A driptray is installed with the purpose of gathering and draining away melt water during defrosting. Connect
a hose or pipe along with a heat trace cable between the outlet of the drip tray and a drain or a free draining
piece of ground. The heat cable must be connected to the terminal provided and is necessary to prevent ice
blockage.
Caution Check with a spirit level that the heat pump is installed horizontally.
Caution Incorrect positioning of the heat pump risks reduction of performance.
Planning guide Atec
Thermia Värmepumpar VIIFB102 5

Caution The unit with water heater must be placed indoors, in an area with a floor drain.
Caution The unit with water heater must be placed indoors, on a stable surface. The floor must be able to support the
gross weight of the unit with filled water tank (see Technical data).
N
Avoid placing the heat pump near windows or walls to noise sensitive areas.
N
Ensure that there is sufficient distance to neighbouring properties so that they are not exposed to noise. Ap-
plicable local regulations must be followed.
N
The heat pump should not be enclosed.
N
Keep the heat pump and its immediate area free of snow, ice, leaves etc.
N
Remember that the heat pump must have a certain amount of space in order to function and for servicing.
Otherwise there is a risk that the air will recirculate from exhaust to intake. Avoid this by following the dimen-
sions given below.
>
5
00m
m
>
5
0
0
m
m
>1500 mm
>
400
m
m
>
500
mm
1.3.2 Lifting instructions
To lift the heat pump into position, unscrew the side plates by slackening off the screws (1).
Then use the side members behind the side panels to lift and position the heat pump.
Planning guide Atec
VIIFB102 Thermia Värmepumpar
6

1
Planning guide Atec
Thermia Värmepumpar VIIFB102 7

2 The heat pump
2.1 Dimensions and connections
4
3
6
5
7
1
2
Position Description 6-9 kW 11-13 kW 16-18 kW
1 Width 856 mm 1,016 mm 1,166 mm
2 Depth 510 mm 564 mm 570 mm
3 Distance from HP side to supply line pipe 251 mm 285 mm 366 mm
4 Height 1,272 mm 1,477 mm 1,557 mm
5 Height to supply line pipe, 28 mm Cu 155.5 mm
6 Height to return line pipe, 28 mm Cu 96.5 mm
7 Length max protruding pipe 30 mm
Planning guide Atec
VIIFB102 Thermia Värmepumpar
8

Control unit Atec Standard
600
380 204
1
1. Lead-in for supply, sensor and communication cables
Control unit Atec Plus
675
420 255
123
4
1. Supply line for heating system, 28 mm Cu
2. Supply line to water heater, 28 mm Cu
3. Supply line from heat pump, 28 mm Cu
4. Lead-in for supply, sensor and communication cables
Planning guide Atec
Thermia Värmepumpar VIIFB102 9

Control unitAtec Total
1845 ±10
596
455 690
1
2
3
45
125
210
330
6
7
89
10
1. Supply line heating system,28 mm Cu
2. Return line heating system,28 mm Cu
3. Connection for bleed valve,22 mm Cu
4. Hot water line,22 mm Cu
5. Cold water line,22 mm Cu
6. Lead-in for supply, sensor and communication cables
7. Supply or return line heat pump
8. Supply or return line heat pump
9. Extra knock-out
10. Safety valve for temperature and pressure (only applies to certain models)
Position 7 and 8 can be connected to either the left or right-hand side or at the
bottom of the control unit.
2.2 Sound levels
The instantaneous sound power in variable speed mode depends on meteorological conditions as well as on present heating demand.
For a heat pump sized according to common practice that operates on/off with 1h or less on cycle periods, the sound level will normally
not exceed the nominal at temperatures A7W30/35.
A weighted Sound Power Level, dB(A) ref. 1 pW
Heat pump size kW 6 9 11 13 16 18
Fan running at constant rpm according to the 'Silent mode' function Sound power, dB(A) 60.1 59.2 59.6 61.0 64.9 72.6
Fan running at the variable speed mode default rpm Sound power, dB(A) 61.3 61.0 61.0 62.4 67.0 76.3
Fan running at the variable speed mode maximum rpm Sound power, dB(A) 66.4 65.8 64.6 66.6 71.1 81.0
Tab. 1: Sound power levels according to ISO EN 3741 at A7W30/35
Planning guide Atec
VIIFB102 Thermia Värmepumpar
10

3 System example
3.1 System example Atec Total
Atec Total includes the control module with supply and return pipe sensors, circulation pump, 3-way valve, electric auxiliary heater and
water heater. The heat pump produces heat, cooling and hot water.
Production of heating and hot water cannot occur at the same time because the exchange valve for heating and hot water is positioned
after the heat pump and the auxiliary heater. Hot water production is prioritised ahead of heat and cooling. Two heating circuits can be
connected, one using a shunt. The shunt is controlled by the heat pump control system.
The flow line temperature is controlled with reference to the outside temperature following a set heat curve. The additional heater starts
automatically on demand. The auxiliary heater carries out peak heating charging (anti-legionella function) in those operating modes
that permit auxiliary heat.
Buffer tank is installed for equalisation of the temperature for the heating system and to guarantee sufficient energy when defrosting.
The buffer tank volume must be 10 l/kW heat pump output (for systems with water heaters).
For position explanations, see the chapter Symbol Key.
Planning guide Atec
Thermia Värmepumpar VIIFB102 11

5
96 91
52
114
100
36
51
50
80
83
10
11
10
11
53
55
77
87
83 80
13
12
18
62
355
107 108 109
133 134 135
101 103
112
10
11
117
10
11
40
79
60
120
63 64 33
3.1.1 Symbol key
The following symbol key applies to all system solutions:
Pos Description Pos Description
5 Heat pump unit 80 Shut-off valve
10 Supply line 83 Non-return valve
11 Return line 85 Air bleeding valve
12 Cold water 87 Safety valve (9 bar, WW)
13 Hot water 91 Dirt strainer with shut-off valve
18 Hot water storage tank 96 Flexible hose
21 Volume tank 100 Security valve (1.5 bar)
33 Circulation pump (shunt additional heater) 101 Reversing valve pool
36 System circulation pump 103 Pool heater exchanger
40 Control unit 107 Shunt valve (distribution circuit 1)
50 Outdoor sensor 108 Supply line sensor (distribution circuit 1)
51 System supply line sensor 109 Circulation pump (distribution circuit 1)
Planning guide Atec
VIIFB102 Thermia Värmepumpar
12

Pos Description Pos Description
52 Return line sensor 112 Expansion vessel (hot gas)
53 Hot water starting sensor 114 Immersion heater
55 Hot water sensor top TWC 117 Additional heater
60 Sensor pool 120 Fan coil
62 Room sensor 133 Shunt valve (distribution circuit 2)
63 Shunt valve (additional heater) 134 Supply line sensor (distribution circuit 2)
64 Supply line sensor, mixing valve 135 Circulation pump (distribution circuit 2)
77 Diverting valve hot water 355 Connecting self-regulating heating cable for drip tray
79 Reversing valve cooling tank
Planning guide Atec
Thermia Värmepumpar VIIFB102 13

4 Piping installation
4.1 Water volume in heating system
In order to secure the defrosting of the outdoor unit, a minimum amount of water must be contained in the heating system. This is
shown in the table below.
If the heating system itself holds the amount of water described in the table, a volume tank is not needed, but recommended.
N
If the amount of water in the heating system is not sufficient, Low Pressure alarms may occur.
Volume tank table Unit 6 kW 9 kW 11 kW 13 kW 16 kW 18 kW
Min water volume in heating system. Atec Standard and
Atec Plus l 120 180 220 260 320 360
Min water volume in heating system. Atec Total l 60 90 110 130 160 180
4.2 Minimum flow in the heating system
Make sure that the dimensioning of the piping in the heating system is sufficient to get the minimum flow presented below:
HP Size 6kW 9kW 11kW 13kW 16kW 18kW
l/min 7.9 11.5 14.5 16.7 19.8 23.7
N
Insufficient flow in the system may result in high pressure-, or low heat circulation flow alarms.
4.3 Noise and vibrations
4.3.1 Installation of the heat pump
To prevent disturbing noise from the heat pump the following recommendations should be observed:
▪In the event the heat pump is positioned on a vibration sensitive base, vibration dampers should be used. The vibration dampers
must be correctly dimensioned with regard to the heat pump's weight so that static spring depression of at least 2 mm is obtained
in all mounting components. Vibration dampers are available to purchase as accessories.
▪Connection of the heat transfer fluid to the heat pump must be made using a flexible hose to prevent transmission of vibration to
building construction and the pipe system, see Flexible hoses.
▪Ensure that pipes at lead-ins are not lying against the walls.
▪Ensure that the electrical supply cable does not provide a path for vibration because it is overstretched.
Planning guide Atec
VIIFB102 Thermia Värmepumpar
14

4.3.2 Flexible hoses
All pipes should be routed in such a way that vibrations cannot be transmitted from the heat pump through the piping and out into the
building. This also applies to the expansion pipe.
We recommend that flexible hoses are used for all pipe connections to avoid the transmission of vibrations. Flexible hoses are available
to purchase as accessories.
The figures below show how appropriate and inappropriate installations look using this type of hose.
Do not twist the flexible hoses as the are installed.
At threaded connections, use a counterhold spanner
Cut the hose to the correct length to avoid excess bowing-out or stretching at
bends
Cut the hose to the correct length to avoid excess bowing-out or
stretching and offset the ends so that the hose is installed completely straight
Use fixed pipe bends to avoid excess stress on bends next to connections
4.4 Maximum distance between indoor and outdoor units
N
Maximum distance is 15 metres with a pipe diameter of 28 mm. Thinner pipes decreases the distance.
Planning guide Atec
Thermia Värmepumpar VIIFB102 15

5 Electrical Installation
5.1 Installation
The control centre contains the necessary components for voltage supply, control systems and operation.
Caution The control centre must be installed in a frost-free environment.
5.1 Cable connection
N
Laying electrical wiring can also cause noise so this installation must be carried out appropriately. An appro-
priate installation is where there is approximately 300 mm free cable between the heat pump and the build-
ing. It is inappropriate to bolt trunking between the heat pump and the wall. This is because vibrations can
then be transmitted from the heat pump through the trunking to the walls of the house.
UV resistant cable must be used for outdoor power cables. Cable choice must follow applicable local and national regulations.
UV resistant, twinned pair date/telephone cable must be used for outdoor communication cables. The cable must be screened with the
one end of the screening (it does not matter which end) earthed in a ground block.
The cable section area must be a minimum of 0.25 mm2.
When the power cable is connected to the terminal block a screwdriver is used to open the terminal block.
1
235 O K!
4
Fig. 1: Connecting power cable to terminal block.
1. Insert the screwdriver.
2. Straighten the screwdriver.
3. Push the screwdriver down to release the cable lock.
4. Insert the cable and hold it in place.
5. Pull the screwdriver out.
6. Check that the cable is secured by carefully pulling on the ca-
ble.
Planning guide Atec
VIIFB102 Thermia Värmepumpar
16

5.2 Positioning outdoor sensors
H
2/3 x H
Recommended location
Unsuitable location
▪Position the outdoor sensor on the north or north west side of the house.
▪For higher buildings, the sensor should be positioned between the second and third storeys. Its location must not be completely
protected from the wind but not in a direct draft. The outdoor sensor should not be placed on reflective panel walls.
▪The sensor must be positioned at least 1 m from openings in the walls that emit hot air.
▪If the sensor cable is connected through a pipe, the pipe must be sealed so that the sensor is not affected by outgoing air.
Planning guide Atec
Thermia Värmepumpar VIIFB102 17

6 Technical data
6.1 Atec
6.1.1 Technical data
Atec 6 kW 9 kW 11 kW 13 kW 16 kW 18 kW
Type Air/Water
Refrigerant Type R407C
Amount Kg 4,0 4,3 5,0 5,1 5,65,6
Test pressurisation MPa 3,4
Design pressure Mpa 3,1
Compressor Type Scroll
Oil POE
Electrical data 3-
N 50Hz heat
pump
Mains power supply V 400
Rated output, compres-
sor kW 2,2 2,9 3,3 4,2 5,0 6,1
Rated output, fan kW 0,18 0,28 0,72
Start current10 A 12 10 18 17 18
Fuse A 10 16
Electrical data 3-
N, 50Hz control
unit
Mains power supply V 230/400
Rated output, circ.
pump8kW 0,07 0,14
Auxiliary heater, 5 step8kW 3/6/9/12/15
Fuse A 1012/1613/1614/2015/2516
Electrical data 1-
N 50Hz heat
pump
Mains power supply V 230
Rated output, compres-
sor kW 2,4 2,8 3,6 4,3 5,5 -
Rated output, fan kW 0,18 0,28 -
Start current10 A 11 21 26 28 -
Fuse A 20 32 32 -
Electrical data 1-
N, 50Hz control
unit
Mains power supply V 230
Rated output, circ.
pump8kW 0,07 0,14
Auxiliary heater, 3 step8kW 3/6/9
Fuse A 1617/3018/4019
Planning guide Atec
VIIFB102 Thermia Värmepumpar
18
Atec
Energy eciency class
Energy eciency class built in temperature control package
Energy eciency class (low temperature applications)
Energy eciency class built in temperature control package
(low temperature applications)
Declared load prole
Energy label water heater
A+
A+
A+
A+
B
A++
A++
A+
A+
XLXL
A
A+
A+
A++
A++
XL
A
A++
A++
A++
A++
XL
A
A+
A+
A++
A++
XXL
B
A+
A+
A+
A+
XXL
B
6 kW 9 kW 11 kW 13 kW 16 kW 18 kW

Atec 6 kW 9 kW 11 kW 13 kW 16 kW 18 kW
Performance11 COP13,26 3,40 3,44 3,38 3,21 3,10
Heat factor1kW 4,73 6,22 7,68 9,10 11,40 13,26
Incoming power1kW 1,45 1,83 2,23 2,69 3,56 4,28
COP24,32 4,38 4,68 4,35 4,12 3,97
Heat factor2kW 6,49 8,59 11,07 12,30 15,21 17,59
Incoming power2kW 1,50 1,96 2,36 2,83 3,69 4,42
COP34,73 4,73 5,01 4,67 4,61 4,25
Heat factor3kW 6,87 8,81 10,91 12,64 15,88 18,58
Incoming power3kW 1,45 1,86 2,18 2,70 3,44 4,37
EER42,23 2,35 2,55 2,41 2,29 2,33
Cooling output4kW 4,21 5,85 7,52 8,85 10,39 13,16
Incoming power4kW 1,88 2,49 2,95 3,67 4,53 5,65
Nominal flow5Heating circuit l/s 0,165 0,215 0,263 0,308 0,372 0,430
External available
pressure9Heating circuit kPa 60,7 59,8 58,7 56,7 96,8 95,9
Pressure
switches /pres-
sure transmitter
Low pressure
(pressure transmitter) MPa 0,05
Operation MPa 2,85
High pressure MPa 3,1
Water volume Water heater6l 180
Condenser l 1,6 2,1 2,7 2,7 3,2 4,3
Min water volume in heating system. 22
Atec Standard and Atec Plus
l 120 180 220 260 320 360
Min water volume in heating system.22
Atec Total
l 60 90 110 130 160 180
Number of units 2
Heat pump Dimensions L x W x H mm 856x510x1272 1016x564x1477 1166x570x1557
Weight (empty) kg 125 131 150 155 185 191
Noise output level:
normal operation7dB(A) 61,5 61,0 61,0 62,5 67,0 74,5
Noise output level:
silent operation7dB(A) 60,0 59,0 59,5 61,0 64,9 70,5
Fan speed min/max rpm 500/745 500/745 425/620 465/690 625/805 770/1000
Control unit
Atec Standard Dimensions L x W x H mm 380x204x600
Weight kg 18
Control unit
Atec Plus Dimensions L x W x H mm 420x255x67520
Weight kg 21
Control unit
Atec Total Dimensions L x W x H mm 596x690x184521
Weight (empty) kg 106
Weight (filled) kg 286
Measurements are carried out on a limited number of circulation pumps, which can give variations in results. Tolerances in the measurement methods can also give variations.
1) At A2/W35 in accordance with EN14511 (incl. circulation pump, fan and defrosting for Atec Plus and Atec Total).
2) At A7/W35 in accordance with EN14511 (incl. circulation pump and fan for Atec Plus and Atec Total).
3) At A7/W35 Δ10K hot side in accordance with EN 255.
4) At A7/W35 according to EN 14511.
5) Nominal flow: heating circuit Δ10K.
6) Only applies to Atec Total.
7) Sound power level measured according to EN ISO 3741 at A7W35 and frost-free evaporator.
8) Only applies to Atec Plus and Atec Total.
Planning guide Atec
Thermia Värmepumpar VIIFB102 19

9) The pressure that must not be exceeded outside the heat pump without falling below the nominal flow.
10) According to IEC61000.
11) The values apply to new heat pumps with clean heat exchangers.
12) Heat pump with 3 kW additional heater.
13) Heat pump with 6 kW additional heater.
14) Heat pump with 9 kW additional heater.
15) Heat pump with 12 kW additional heater.
16) Heat pump with 15 kW additional heater.
17) Heat pump with 3 kW additional heater.
18) Heat pump with 6 kW additional heater.
19) Heat pump with 9 kW additional heater.
20) Including pipe connection
21) Including pipe connection and ± 10 mm for foot adjustment
22) Water volume without hot water heater
6.1.2 Working range compressor operation
Lowest and highest temperatures for production of hot water, heating and cooling.
The control unit controls the heat pump operating range.
1. Water temperature °C
2. Air temperature °C
3. Heating
4. Cooling
Planning guide Atec
VIIFB102 Thermia Värmepumpar
20