Vaillant aroTHERM plus User manual

Comfort for your home
aroTHERM plus
Air-to-water heat pumps •aroTHERM plus
Installer‘s Quick Guide

Important Note:
This quick guide shall support the professional installer in planning, installing and
commissioning the appliance. It shall on no account replace or modify the installation,
operating and maintenance instructions delivered with the appliance which always have to
be observed. This guide does not replace the need for training, Vaillant training should be
completed before installation.
The non-observance of the instructions delivered with the appliance can lead to
malfunctions of the appliance and can result in death or serious injuries. Some
characteristics of the appliance shown in this quick guide may vary from those of the most
current series version. Vaillant Group UK Ltd shall not be held liable for any damages or
injuries arising directly or indirectly from the use of this quick guide.
©All rights reserved. Vaillant UK, 2019.
Download our aroTHERM plus
manual here
Download our technical specification
brochure here
You can scan or click QR-Codes in this brochure

Vaillant Group UK Ltd.
Nottingham Road, Belper, Derbyshire DE56 1JT
Telephone [phone]
www.vaillant.co.uk/renewables
[e-mail]
Plan your work …
»Select the correct aroTHERM plus to fit your needs: performance, dimensions,
sound emmissions
4
»Find the perfect space for your installation: quiet, vented, safe 7
»Select the perfect domestic hot water storage 11
»System expansion vessel sizing 12
»Decide on installation type to select required accessories (ground, wall, roof) 13
»Tick your planning checklist 16
… work your plan: Installing the aroTHERM plus system
»Choose your system schematic 17
»Start with the hydraulic connection 18
»Proceed to the power supply and eBUS connection 19
»Choose your indoor unit uniTOWER, hydraulic module or heat pump interface 21
»Connect the system accessories heat exchanger module 26
»Connect the buffer tank 28
»Tick your installation checklist 30
... and start your system
»Follow the instructions of the installation assistant 31
»Just in case: Find remedies to error, status and maintenance codes 31
»Technical data 32
»Accessories 34
»Notes 37
Check the product installation manuals for further information.
Get started quickly!
Your step-by-step guide to installing the aroTHERM plus
We are here to help you!
Don‘t hesitate to contact us for further support:

4Installer's Quick Guide - aroTHERM plus 11/2020 4Back to main menu
aroTHERM output 35°C flow 40°C flow 45°C flow 50°C flow 55°C flow
Output SCOP Output SCOP Output SCOP Output SCOP Output SCOP
3.5kW
-5°C 4.2
4.41
4.1
4.03
4
3.65
3.9
3.37
3.8
3.10
-3° C 4.6 4.4 4.3 4.2 4
0°C 4.7 4.7 4.6 4.5 4.4
2°C 4.9 4.9 4.9 4.7 4.6
5kW
-5°C 6.3
4.48
6
4.13
5.6
3.77
5.5
3.41
5.4
3.06
-3° C 6.8 6.4 6.1 5.9 5.8
0°C 6.9 6 .7 6.6 6.4 6.2
2°C 7.1 76.9 6.7 6.5
7kW
-5°C 8.2
4.36
8.1
4.13
8
3.91
7.5
3.65
7
3.39
-3° C 8.8 8.6 8.4 7.9 7.4
0°C 9.5 9.3 9.1 8.6 8.1
2°C 10 9.8 9.6 9 8.5
10kW
-5°C 9.9
5.03
9.7
4.58
9.4
4.13
9.1
3.85
8.8
3.58
-3° C 10.7 10.3 10 9.6 9.2
0°C 1 1.9 11.6 11.3 1 0.7 10.2
2°C 12.8 12.5 12.1 11.5 10.9
12kW
-5°C 13.1
4.88
12.8
4.55
12.5
4.21
1 1.7
3.92
10.8
3.63
-3° C 13.9 13.4 12.9 12.1 11.2
0°C 15.2 14.6 14.1 13.2 12.3
2°C 16 15.5 14.9 13.9 13
Plan your work …
Select the correct aroTHERM plus to fit your needs
Performance data
When designing a heating system that utilises a heat pump, there are a number of design factors that need to be considered.
Heat loss
MCS recommend using the MIS 3005 installation standard for designing a heat pump system. Systems should be specified
at peak winter requirements, depending on location, to ensure year round comfort as detailed in the table below.
SCOP data
MIS 3005 design temperatures Hourly dry-bulb temperature (/
oC)
equal to or exceeded for % of
the hours in a year
99%
Belfast -1.2
Birmingham -3.4
Cardiff -1.6
Edinburgh -3.4
Glasgow -3.9
London -1.8
Manchester -2.2
Plymouth -0.2
A room-by-room heating requirement check will then need to be carried out at the set outside temperature in order to
understand the heating needs of the total property.

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Product dimensions
90
26
122
765 mm
449 mm
1100 mm
3.5kW
5kW
965 mm
7kW
15
65 mm
10kW
12kW
185 kg*
270
106
740180180
477
14 14
133 kg*
121 kg*
G 1¹/“
*unboxed, ready for operation

6Installer's Quick Guide - aroTHERM plus 11/2020 6Back to main menu
Sound power and pressure level
For sound pressure calculations, use sound power values in table below to ensure compliance with building regulations.
See charts for reference and guidance.
20
30
40
50
60
0510 15
Sound pressure level[dB(A)]
Distance from heat pump [m]
aroTHERM VWL 55/6
53,4
47,4
43,9
41,439,4
37,8 35,3 33,4 31,829,9
44,4
38,4
34,9
32,4
30,4 28,8
26,324,4 22,820,9
20
30
40
50
60
0510 15
Distance from heat pump [m]
Sound pressure level[dB(A)]
58,9
52,9
49,4
46,9
44,9
43,3
40,838,9 37,3 35,4
49,0
43,0
39,5
37,035,0
33,430,929,0 27,4 25,5
aroTHERM VWL 125/5 (230V)
20
30
40
50
60
0510 15
Distance from heat pump [m]
Sound pressure level[dB(A)]
55,0
49,0
45,5
43,0
41,039,4
36,9 35,0 33,431,5
44,2
38,2
34,7
32,2
30,228,6 26,124,2 22,620,7
aroTHERM VWL 75/6
VWL 35/6
VWL 55/6
VWL 105/6 (230V)
VWL 125/6 (230V)
VWL65/6
VWL 75/6
Nominal operation with max. output Operation at 60 % compressor speed reduction
aroTHERM plus 3.5 kW 5 kW 7 kW 10 kW 12 kW
Sound power level A7/W55 54 dB 54 dB 55 dB 60 dB 60 dB
Listen here

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Find the perfect space for your installation
A quiet space for your installation
Whilst the aroTHERM plus has been accredited by Quiet Mark* for it‘s super low noise levels. When siting pay consideration to
bedroom windows and flat roof installations.
Do!
Avoid
*Models 3.5, 5, 7 and 12kW

8Installer's Quick Guide - aroTHERM plus 11/2020 8Back to main menu
Installation and R290 clearances
1 m 1 m
1 m
1 m 1 m
1 m
1 m
0,5 m
2,3 m
0,5 m 1 m
1,2 m
0,5 m
0,5 m
0,5 m
0,5 m
0,5 m
1 m
2,3 m
1,6 m
0,5 m
0,5 m
0,5 m
0,25 m
0,25 m
0,5 m
0,5 m
0,1 m
0,5 m
0,25 m
When placing the unit you must be aware of drains and
openings.
In the unlikely event of a refrigerant leak the gas needs to be
allowed to disperse to stop the risk of the gas igniting.
Follow the diagrams below to ensure adequate clearance.
C
D
A
B
Minimum clearances Unit Dimension
A mm 2100
B mm 3100
C mm 200/250
D mm 1000
C
D
A
B
There must be no ignition sources, such as plug sockets,
lamps or rotary insolation switches in the protective zone.
Air vents to void areas and air tight drains can be within the
protective zone.
Protective zone

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A vented space for perfect operation
Do!
Don't
Operation clearances
0,6m
0,1m
0,5m
0,25m
0,2m
1m

10 Installer's Quick Guide - aroTHERM plus 11/2020 10 Back to main menu
Install several aroTHERM plus in one spot: quiet, vented, safe!
Do!
Don't
500 mm
500 mm

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Select the perfect domestic hot water storage
?
uniSTOR Heat Pump standard cylinder range
Storage temperature in
cylinder 150 200 250 300 500 800
Amount of useable hot water at point of use (litres)
50oC200 267 333 400 667 1067
55oC225 300 375 450 750 1200
60oC250 333 417 500 833 1333
65oC275 367 458 550 917 1467
note: 40oC temperature at point of use
uniSTOR Heat Pump pre-plumbed cylinder range
Storage temperature in
cylinder 150* 200 250 300
Amount of useable hot water at point of use (litres)
50oC200 267 333 400
55oC225 300 375 450
60oC250 333 417 500
65oC275 367 458 550
*150 litre slimline cylinder
note: 40oC temperature at point of use
Cylinder compatibility matrix
aroTHERM
plus
uniSTOR
150 litre
cylinder
uniSTOR
200 litre
cylinder
uniSTOR
250 litre
cylinder
uniSTOR
300 litre
cylinder
uniSTOR
500 litre
cylinder
auroSTOR
500 litre
cylinder
uniSTOR
800 litre
cylinder
3.5kW  
5kW 
7kW 
10kW 
12kW 
Scan or click the QR-Code for DHW sizing

12 Installer's Quick Guide - aroTHERM plus 11/2020 12 Back to main menu
Minimum required buffer water volume for deicing
aroTHERM plus Minimum open volume required
aroTHERM plus 3.5 and 5kW 15 litres
aroTHERM plus 7kW 20 litres
aroTHERM plus 10 and 12kW 45 litres
System expansion vessel sizing
Scan the QR code to easily size the expansion vessel
?
Scan or click the QR-Code for dimensions of the expansion vessel

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Installer's Quick Guide - aroTHERM plus 11/2020 13
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Decide on the installation type
On the roof ...
On the wall ...
300 mm
On the ground ...
100 mm
100 mm
Soak away should
always be used

14 Installer's Quick Guide - aroTHERM plus 11/2020 14 Back to main menu
Select mounting accessories
Installation option
Ground/Roof Wall
Connection
Plain aroTHERM straight pipe connection kit
Art.-No.: 0010027976
Mounting
Simple Anti-vibration feet large
Art.-No.: 0020250226
Anti-vibration rubber feet small
Art.-No.: 0020252091
Wall brackets
for insulated walls
Art.-No.: 0020250224
(excludes rubber feet)
Wall brackets
for non-insulated walls
Art.-No.: 0020250225
(excludes rubber feet)
Click on Art.-No. for
Installation instructions
Please note that the wall brackets are only suitable for the 3.5kW, 5kW and 7kW models.

15
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Installation option
Ground/Roof Wall
Mounting
Snow Snow spacer
Art.-No.: 0010027984
(excludes rubber feet)
Connections kits - piping and insulation
Simple Wall EPP insulation kit
Art.-No.: 0010027974
(includes short straight flexible hose)
Snow Floor EPP insulation kit
Art.-No.: 0010027971
(includes short right angled
flexible hose)
Floor EPP extension kit
Art.-No.: 0010027972
Click on Art.-No. for
Installation instructions

16 Installer's Quick Guide - aroTHERM plus 11/2020 16 Back to main menu
Check your plan!
Tick your planning checklist
Heat pump chosen depending on the heating load calculation chosen
Installation site planned (quiet, vented, safe)
System temperatures chosen (underoor, radiator, fan coil)
Domestic hot water and buffer tank chosen
Expansion vessel determined
System schematic selected
System components including accessories for installation ordered

17
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Scan or click the QR-Code to download the
aroTHERM plus schematics PDF
Choose your system schematic....
Scan or click QR-Code for installation video playlist
Watch our installation videos....

18 Installer's Quick Guide - aroTHERM plus 11/2020 18 Back to main menu
… work your plan
Installing the aroTHERM plus system.
Start with the hydraulic connection
0.75 m min.
Scan or click QR-Code for installation video
NOTE: use of system filter and
de-airing is important for the long
running low maintenance of the
system

19
Installer's Quick Guide - aroTHERM plus 11/2020 19
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Proceed to the power supply and eBUS connection
Preparation
T20
B
A
-
+
N
L
PE
30 mm
≤
30 mm
≤
40 mm
≤
eBUS 230 V Fuse T4
A
Power supplyconnection (230 V)
X211 X210
X200
X206
NL1
NL1 L2 L3
230 V
230 V
1,5 x 5,5
If possible e-bus and power cable must be run
separately, if this is not possible the e-bus cable must
be shielded to prevent voltage induction

20 Installer's Quick Guide - aroTHERM plus 11/2020 20 Back to main menu
eBUS connection
eBUS
+ -
X211 X210
X200
X206
NL1 L2 L3
0,6 x 3,5
Fasten cable strain reliefs
PH2
Power supply
230 V
N
L
1
2
3
4
5
1
2
L
N
L1
L2
L3
N
L
N
X211
X210
X200
4
2
3
1