Heat pumps

• Heat pumps for central heating Installer‘s Quick Guide

aroTHERM split

Comfort for my home

Important Note:
This quick guide shall support the professional installer in planning, installing and commis-
sioning 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.
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 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, 2020.

Hint: Hint:
Follow the symbol to dedicated documents Scan the QR code to download the digital
for more detailed information. version of this Quick Guide.

0020297932
Get started quickly!
Your perfect installation with aroTHERM split step-by-step:

Plan your Work …

» Select the ideal aroTHERM split to fit your needs: performance, dimensions, sound 4
» Find the perfect space for your installation: quiet, vented 7
» Select the perfect domestic hot water and buffer storage 12
» Dimension the expansion vessel 13
» Select your system scheme (system components, hydraulics and wiring) 14
» Decide on installation type to select required accessories (ground, wall, roof) 15
» Tick your planning checklist 18

… work your Plan: Install the aroTHERM split system

» Start with the hydraulic installation 19
» Proceed to the power supply and eBUS connection 22
» Connect the uniTOWER or hydraulic module 24
» Commission the refrigerant circuit 27
» Tick your installation checklist 28

... and start your System

» Scan the QR code to easily set up the system 29
» Just in case: Find remedies to error, status and maintenance codes 29

Find technical data…

» aroTHERM split 30
» uniTOWER, hydraulic module 31

Check the product installation manuals for further information.

We are here to help you!

Don‘t hesitate to contact us for further support:

Vaillant GmbH
Berghauser Str. 40 D-42859 Remscheid
Tel. +492191 18 0 Fax +492191 18 2810
info@vaillant.de www.vaillant.de
 10

0
-20 -15 -10 -5 0 5 10 15 20

25

Plan your work …

25

20
20

15
15

10
10

Select
5 the ideal aroTHERM split to fit your5needs
0
0 VWL 35/5 VWL 75/5 VWL 105/5 (230 V/400 V)
Heating -20 -15 -10 -5 0 5 10 15 20
-20 -15
VWL 55/5
-10 -5 0 5 10 15 20
VWL 125/5 (230 V/400 V)

Flow temperature 35 °C Flow temperature 45 °C

25 25

20 20
Power output [kW]

Power output [kW]

15 15

10 10

5 5

0 0
-20 -15 -10 -5 0 5 10 15 20 -20 -15 -10 -5 0 5 10 15 20
Outdoor temperature [°C] Outdoor temperature [°C]

25
Flow temperature 55 °C
14
25
12 20

20
10
15
Power output [kW]

8
15
10
6
10
4 5

25
0
0 -20 -15 -10 -5 0 5 10 15 20
020 25 30 35 40 45 50
-20 -15 -10 -5 0 5 10 15 20
Outdoor temperature [°C]

Cooling
25 VWL 35/5
VWL 55/5
VWL 75/5
VWL 105/5 (230 V/400 V)
VWL 125/5 (230 V/400 V)

20 Flow temperature 7 °C Flow temperature 18 °C

14 14
15
12 12

10
10 10
Power output [kW]

Power output [kW]

8 8
5
6 6

40 4
-20 -15 -10 -5 0 5 10 15 20
2 2

0
25 0
20 25 30 35 40 45 50 20 25 30 35 40 45 50
Outdoor temperature [°C] Outdoor temperature [°C]
20

15
4 Back to main menu Installer's Quick Guide - aroTHERM split 02/2021

10
14
Product dimensions

70

107
1.10
0m 449 41
m
1565 mm
VWL 105/5
VWL 125/5
191 kg*

965 mm
VWL 75/5
113 kg*

765 mm
VWL 35/5
VWL 55/5
82 kg*

44
9m
m

180 740 180

14
477

106
14

270

*unboxed, ready for operation

Installer's Quick Guide - aroTHERM split 02/2021 Back to main menu 5

Sound pressure level

Nominal operation with max. output Operation at 60 % compressor speed reduction

VWL 35/5, VWL 55/5 VWL 75/5

70 70

59,0 60,0
Sound pressure level* [dB(A)]

Sound pressure level* [dB(A)]

60 60
53,0 54,0
49,5 52,0 50,5
50,0
50 47,0 50 48,0
45,0 46,0 46,0
44,0 43,4 44,4
40,9 42,5 41,9
40,5 39,0 40,0 40,0
40 38,0 37,4 40 38,0 38,4
36,0 35,5 36,4 36,5
34,4 33,9
31,9 32,0
30,0 30,4 28,5
30 28,4 30
26,5

20 20
0 2 4 6 8 10 12 14 0 2 4 6 8 10 12 14
Distance from heat pump [m] Distance from heat pump [m]

VWL 105/5 (230 V), VWL 125/5 (230 V) VWL 105/5 (400 V), VWL 125/5 (400 V)
70 70
65,0 65,0
59,0 59,0
Sound pressure level* [dB(A)]

Sound pressure level* [dB(A)]

60 57,0 55,5 60 55,5

53,0 59,0 53,0
51,0 51,0 51,0
49,4 53,0 49,4
50 47,5 46,9 50 46,9
45,0 45,0 49,5 45,0
43,0 43,4 43,4
41,4 41,5 46,0 41,5
38,9 45,0
40 37,0 40 43,4
35,4 40,9
33,5 39,0
37,4
35,5
30 30

20 20
0 2 4 6 8 10 12 14 0 2 4 6 8 10 12 14
Distance from heat pump [m] Distance from heat pump [m]

* Sound pressure level applicable to the following installation situations:

< 5m
< 5m
< 3m < 3m

... this sound pressure level is reduced as follows:

-3 -6
db(A) db(A)

or
< 3m > 3m

0020222099
0020297932

6 Back to main menu Installer's Quick Guide - aroTHERM split 02/2021

Find the perfect space for your installation

A quiet space for your installation

Do! Don't

Installer's Quick Guide - aroTHERM split 02/2021 Back to main menu 7

A vented space for perfect operation

Do! Don't

Minimum distances for flawless operation

1m

)
5m
m (0,2
0,2

m
0,1

0,6
m m
0,5
3m

8 Back to main menu Installer's Quick Guide - aroTHERM split 02/2021

Install several aroTHERM split in one spot

1,5 m*
1m
m
0,1 m*
02,

5m *
0,2 ,45 m
0
m
0,5

1
1,7 ,2 m
m* m
0,5
3m

m
0,5

1,5 m*
1m

5m *
0,2 ,45 m
0
0, ,1 m
*
m
0
2

1
2,2,2 m
m*
m
5

VWL 105/5
0,

VWL 125/5
0, ,4 m

0
*
m

1,2 ,6 m
0
6

m*

Installer's Quick Guide - aroTHERM split 02/2021 Back to main menu 9

Install several aroTHERM split in one spot

1,5 m*
1m
0, ,1 m
*
m
0
2 5m *
0,2 ,45 m
0

m
5
0,
2
3,2 m
m*

m
5
0,
0, ,4 m
*
m
0
6

m
5
0,
1
0, ,4 m

1,7 ,2 m
*
m
0
6

m* VWL 105/5
VWL 125/5
0, ,4 m
*
m
0
6

10 Back to main menu Installer's Quick Guide - aroTHERM split 02/2021

Maximum height difference between indoor and outdoor unit
Outdoor unit above indoor unit

VWL 35/5
VWL 55/5

173
≤4
0m

R = 40 40

R = 40

≤3
0m 10 m

VWL 75/5
10 m VWL 105/5
VWL 125/5

256

R = 60 40

R = 60

Outdoor unit below indoor unit

≤2
5m

≤1
0m

Installer's Quick Guide - aroTHERM split 02/2021 Back to main menu 11

Select the perfect domestic hot water and buffer storage

Scan the QR code to quickly calculate

the required storage volume

Storage heated up by ... ... heat pump only ... heat pump and solar heat

uniTOWER uniSTOR uniSTOR uniSTOR uniSTOR uniSTOR uniSTOR

Storage
../5 IS VIH RW 200 VIH RW 300 VIH RW 400 VIH RW 500 VIH SW 400 VIH SW 500

Capacity heated up by
190 l 200 l 300 l 400 l 500 l 200 l 250 l
the heat pump

Tap capacity with 38 °C

at 55 °C inside the 305 l 321 l 482 l 643 l 804 l 321 l 402 l
storage

Time to reheat storage to 55°C without backup heater,

aroTHERM split
once temperature falls below 46°C at 7°C outdoor temperature

VWL 35/5 31 min 32 min 48 min 64 min * 80 min * 32 min 40 min

VWL 55/5 24 min 25 min 37 min 49 min 62 min * 25 min 31 min

VWL 75/5 18 min 19 min 29 min 38 min 48 min 19 min 24 min

VWL 105/5 15 min 16 min 24 min 31 min 39 min 16 min 20 min

VWL 125/5 15 min 16 min 24 min 31 min 39 min 16 min 20 min

* Limited comfort -> We recommend to select the aroTHERM split next in size.

12 Back to main menu Installer's Quick Guide - aroTHERM split 02/2021

Minimum required buffer/ water volume for deicing

With active backup heater, Without active backup heater,

aroTHERM split
system temperature > 25°C system temperature > 15°C

VWL 35/5, VWL 55/5 15 l 40 l

VWL 75/5 20 l 55 l

VWL 105/5, 125/5 45 l 150 l

Dimension the expansion vessel

Scan the QR code to easily dimension your expansion vessel

Scan or Click QR-Code for dimensions

of the expansion vessel

Installer's Quick Guide - aroTHERM split 02/2021 Back to main menu 13

Remaining pressure head of heating circuit pump

800
VWL 5../5 IS: 3,5 kW - 540 l/h
700 VWL 5../5 IS: 5,0 kW - 790 l/h

VWL 7../5 IS: 7,0 kW - 1.020 l/h

Remaining pressure head [mbar]

600
VWL 12../5 IS: 10 kW - 1670 l/h

VWL 12../5 IS: 12 kW - 1.850 l/h

500

400

300

200

100

0
40 50 60 70 80 90 100

Pump power [%]

Select your system scheme (system components, hydraulics and wiring)

Scan the QR code to select a system scheme from our broad data base

Scan or Click QR-Code

to select system scheme

14 Back to main menu Installer's Quick Guide - aroTHERM split 02/2021

Decide on the installation type
On the roof ...

On the wall ...

300 mm

On the ground ...

100 mm

100 mm

Installer's Quick Guide - aroTHERM split 02/2021 Back to main menu 15

Select mounting accessories
Installation option
Ground/Roof Wall

Mounting

Simple Big rubber feet Wall brackets

for insulated walls
Art.-No.: 0020250226 Art.-No.: 0020250224

Small rubber feet Wall brackets

Art.-No.: 0020252091 for non-insulated walls
Art.-No.: 0020250225

Snow Snow spacer

Art.-No.: 0020173403

16 Back to main menu Installer's Quick Guide - aroTHERM split 02/2021

Select refrigerant pipes

Connection type and Installation accesories

Distance between outdoor unit and indoor unit
aroTHERM split up to 5 m 5 m to 10 m up to 25 m
VWL 35/5 Twin tubes Twin tubes Refrigerant pipe, 25 m
VWL 55/5 including eBUS, 5 m including eBUS, 10 m (1/4“)
(1/4“ + 1/2“) (1/4“ + 1/2“)
Art.-No: 0020250311
Art.-No: 0020250307 Art.-No: 0020250308
+
Refrigerant pipe, 25 m
(1/2“)
Art.-No: 0020250312

VWL 75/5 Twin tubes Twin tubes Refrigerant pipe, 25 m

VWL 105/5 including eBUS, 5 m including eBUS, 10 m (3/8“)
VWL 125/5 (3/8“ + 5/8“) (3/8“ + 5/8“)
Art.-No: 0020250309
Art.-No: 0020250305 Art.-No: 0020250306
+
Refrigerant pipe, 25 m
(5/8“)
Art.-No: 0020250310

Scan or Click
QR-Code for
installation instructions

Installer's Quick Guide - aroTHERM split 02/2021 Back to main menu 17

Check your plan!

Tick your planning checklist

Heat pump depending on the heating and cooling load calculation chosen

Installation site planned (quiet, vented)

System temperatures chosen (underfloor, radiator, fan coil)

Domestic hot water and buffer tank chosen

Expansion vessel determined

System scheme selected

System components incl. accessories for installation ordered

18 Back to main menu Installer's Quick Guide - aroTHERM split 02/2021

… work your Plan
Install the aroTHERM split system.

Start with the hydraulic installation

Realize the condensate drain

Do! Don't

100 mm
100 mm

Installer's Quick Guide - aroTHERM split 02/2021 Back to main menu 19

Realize the quietest installation

Origin of vibrations Avoid kinks in the pipe

Do! Don‘t!

Origin

Vibration / noise
e

How to minimize vibrations

Fix refrigerant pipes with

appropriate refrigerant clamps

pipe with refrigerant

insulation clamp

OR

pipe with refrigerant

insulation clamp

20 Back to main menu Installer's Quick Guide - aroTHERM split 02/2021

Connect the refrigerant pipes

Scan or Click QR-Code for installation video

aroTHERM split

VWL 35/5 1/4 “ 1/2 “

VWL 55/5

VWL 75/5 3/8 “ 5/8 “

VWL 105/5
VWL 125/5

Installer's Quick Guide - aroTHERM split 02/2021 Back to main menu 21

Proceed to the power supply and eBUS connection
Calculate the cable cross section
Scan the QR-Code to easily calculate the required cable cross section for the wiring

Scan or Click QR-Code

for calculating the cable cross section

Preparation Power supply connection (230 V / 400 V)

400 V 1,5 x 5,5

X200
X206 X211 X210

L1 L2 L3 N

T20

L1 L2 L3 N
400 V

≤ 30 mm

L 230 V 1,5 x 5,5

N
PE X200
≤ 40 mm
X206 X211 X210

+
- L1 L2 L3 N

≤ 30 mm

L1 N
230 V
eBUS
230 V / 400 V

22 Back to main menu Installer's Quick Guide - aroTHERM split 02/2021

eBUS connection Fasten cable strain reliefs

X200
X206 X211 X210

PH2
L1 L2 L3 N

+ -

≥0,75 mm2 eBUS

Simple power supply Dual power supply

5 5
N 4 N N 4 N
X200 L3 3 X200 L3 3
L2 2 L2 2
L1 1 L L1 1 L

230 V L 2 L 2
X210 N
X210 N
1 1

L 4 L 4 L
N 3 N 3 N
X211 2 X211 2
1 1

5 5
N 4 N N 4 N
X200 L3 3 X200 L3 3
L2 2 L2 2
L1 1 L3 L1 1 L3
L2
400 V L 2 L1 L 2
L2
L1
X210 N
X210 N
1 1

L 4 L 4 L
N 3 N 3 N
X211 2 X211 2
1 1

Installer's Quick Guide - aroTHERM split 02/2021 Back to main menu 23

Connect the uniTOWER or hydraulic module

Install the uniTOWER

Scan or Click QR-Code for installation video

228 70 70 70

112 75
G 1“
G ³/“
112 75
376

136
124

G¾”
G¾”
G1”
G1”

1866
1922

1816

59
5m
m

1880 mm

69
3m
m

24 Back to main menu Installer's Quick Guide - aroTHERM split 02/2021

 Click on images for
installation instructions

Select hydraulic accessories for the uniTOWER

Connection kit without filling with filling

On-wall uniTOWER connection kit, on-wall uniTOWER connection kit, on-wall with filling
Art.-No.: 0020250219 Art.-No.: 0020250221

In-Wall uniTOWER connection kit, in-wall uniTOWER connection kit, in-wall with filling
Art.-No.: 0020250220 Art.-No.: 0020250222

Circulation without pump with pump

Circulation pipe set Circulation pump set
Art.-No.: 0020170502 Art.-No.: 0020170503

Domesitc hot water expansion vessel

DHW expansion vessel back DHW expansion vessel front
Art.-No.: 0020180979 Art.-No.: 0020170500

Additional system components

18l Buffer tank for uniTOWER
Art.-No.: 0020269273

Installer's Quick Guide - aroTHERM split 02/2021 Back to main menu 25

Install the hydraulic module

Scan or Click QR-Code for installation video

22
0
44 87 22
0m 0
10
m 1

88
720 mm

35
0m
m

36 81 36 67

G 1“ G 1“
207
143

G 1¹/“
81

51 47
39,3
64,5

36

26 Back to main menu Installer's Quick Guide - aroTHERM split 02/2021

Commission the refrigerant circuit

Scan or Click QR-Code for installation video

Amount of refrigerant to be filled up VWL 35/5

VWL 55/5
VWL 75/5
VWL 105/5 (230 V/400 V)
VWL 125/5 (230 V/400 V)

2.500

2.250

2.000
Additional refrigerant to be filled up [g]

1.750

1.500

1.250

1.000

750

500

250

0
0 5 10 15 20 25 30 35 40

Pipe length one way [m]

Installer's Quick Guide - aroTHERM split 02/2021 Back to main menu 27

Check your installation!

Tick your installation checklist

Heat pump positioned according to type of installation (ground, wall, roof)

Refrigerant pipes bent and connected

Tightness of refrigerant circuit checked

Refrigerant circuit evacuated

Optional: Additional refrigerant filled up

Refrigerant released from outdoor unit into refrigerant circuit

Safety valve installed

Expansion vessel installed and connected

Manometer installed

All valves installed in system

Hydraulic connected and tight (pressure test performed)

Wiring connection done

Heating system vented

Optional: Warranty extension/ maintanance and service contract signed

28 Back to main menu Installer's Quick Guide - aroTHERM split 02/2021

... and start your System
Scan the QR code to easily set up the system ...

aroTHERM split System - Up & Running!

Just in case ...

Find remedies to error, status and maintenance codes

Scan or Click QR-Code to find remedies

Installer's Quick Guide - aroTHERM split 02/2021 Back to main menu 29

Technical Data - aroTHERM split
VWL 35/5 VWL 55/5 VWL 75/5 VWL 105/5 VWL 105/5 VWL 125/5 VWL 125/5
aroTHERM split
AS AS AS AS AS AS AS
Rated voltage 230 V 230 V 400 V 230 V 400 V
(+10%/- 15%), 50 Hz 1~/N/PE 1~/N/PE 3~/N/PE 1~/N/PE 3~/N/PE
Rated power, maximum 2,96 kW 2,96 kW 3,84 kW 4,90 kW 7,60 kW 4,90 kW 7,60 kW
Rated power factor 1
Rated current, maximum 11,5 A 11,5 A 14,9 A 21,3 A 13,5 A 21,3 A 13,5 A
In-rush current 11,5 A 11,5 A 14,9 A 21,3 A 13,5 A 21,3 A 13,5 A
IP rating IP 15 B
Refrigerant circuit
Max. height difference 30 m
when outdoor unit is
above indoor unit
Max. length of refrigerant 40 m
pipe when outdoor unit is
above indoor unit
Max. height difference 10 m
when indoor unit is above
outdoor unit
Max. length of refrigerant 25 m
pipe when indoor unit is
above outdoor unit
Refrigerant, fill quantity 1,50 kg 1,50 kg 2,39 kg 3,60 kg
Heating output / Cooling output
A-7/W35 3,56 kW 4,88 kW 6,68 kW 10,15 kW 11,80 kW
A2/W35 2,46 kW 3,37 kW 4,51 kW 8,20 kW 8,23 kW
A7/W35 3,13 kW 4,42 kW 5,78 kW 9,70 kW 10,25 kW
A7/W45 3,05 kW 4,04 kW 5,47 kW 9,06 kW 9,60 kW
A7/W55 2,73 kW 3,69 kW 4,95 kW 10,35 kW 10,90 kW
A35/W7 (cooling) 3,12 kW 3,12 kW 4,40 kW 8,69 kW 8,69 kW
A35/W18 (cooling) 4,83 kW 4,83 kW 6,30 kW 12,78 kW 12,78 kW
Coefficient of performance COP, EN 14511 (heating) / Energy efficiency ratio EER, EN 14511 (cooling)
A-7/W35 3,11 2,67 2,64 2,78 2,46
A2/W35 3,75 3,67 3,68 3,87 3,69
A7/W35 4,89 4,68 4,58 4,57 4,61
A7/W45 3,54 3,49 3,57 3,49 3,53
A7/W55 2,62 2,67 2,69 2,77 2,78
A35/W7 (cooling) 2,69 2,69 2,8 2,49 2,59
A35/W18 (cooling) 3,76 3,76 3,58 3,28 3,36
Power consumption, effective
A-7/W35 1,15 kW 1,83 kW 2,53 kW 3,65 kW 4,81 kW
A2/W35 0,66 kW 0,92 kW 1,23 kW 2,12 kW 2,26 kW
A7/W35 0,64 kW 0,95 kW 1,26 kW 2,12 kW 2,26 kW
A7/W45 0,86 kW 1,16 kW 1,53 kW 2,60 kW 2,75 kW
A7/W55 1,05 kW 1,38 kW 1,84 kW 3,74 kW 3,94 kW
A35/W7 (cooling) 1,16 kW 1,16 kW 1,57 kW 3,49 kW 3,49 kW
A35/W18 (cooling) 1,29 kW 1,29 kW 1,76 kW 3,90 kW 3,90 kW
Power consumption
A-7/W35 5,40 A 8,60 A 11,80 A 17,40 A 5,70 A 22,70 A 7,50 A
A2/W35 3,20 A 4,40 A 5,50 A 10,20 A 3,30 A 10,50 A 3,40 A
A7/W35 3,20 A 4,60 A 5,80 A 9,90 A 3,20 A 10,50 A 3,50 A
A7/W45 4,10 A 5,40 A 6,80 A 12,00 A 4,10 A 12,70 A 4,30 A
A7/W55 4,90 A 6,30 A 8,00 A 17,00 A 5,80 A 18,30 A 6,20 A
A35/W7 (cooling) 5,40 A 5,40 A 7,30 A 15,50 A 5,10 A 15,50 A 5,10 A
A35/W18 (cooling) 6,00 A 6,00 A 7,90 A 17,40 A 5,90 A 17,40 A 5,90 A
Sound power, EN12102, EN ISO 9614-1
A7/W55 53 dB(A) 54 dB(A) 54 dB(A) 60 dB(A) 60 dB(A) 60 dB(A) 60 dB(A)
A-7/W35 46 dB(A) 46 dB(A) 48 dB(A) 53 dB(A) 55 dB(A) 53 dB(A) 55 dB(A)
A35/W18 (cooling) 54 dB(A) 54 dB(A) 56 dB(A) 59 dB(A) 59 dB(A) 59 dB(A) 59 dB(A)

30 Back to main menu Installer's Quick Guide - aroTHERM split 02/2021

Technical Data - uniTOWER
VWL 58/5 IS VWL 78/5 IS VWL 128/5 IS
Rated voltage 230 V
230 V 1~/N/PE
(+10%/- 15%), 50 Hz
Rated voltage 400 V
400 V 3~/N/PE
(+10%/- 15%), 50 Hz
Rated power, maximum 5,4 kW 5,4 kW 8,8 kW
Rated current, maximum , 230 V 23,5 A
Rated current, maximum , 400 V 14,5 A
IP rating IP 10 B
Heating circuit
Heating water temperature, minimum/ 20 … 55 °C
maximum
Water content 16,6 l 17,1 l 17,6 l
Operating pressure, minimum 0,05 MPa (0,50 bar)
Operating pressure, maximum 0,30 Mpa (3,00 bar)
Domesitc hot water circuit
Water capacity hot water tank 185 l
Cylinder temperature by heat pump max. 57 °C

Technical Data - hydraulic module

VWL 57/5 IS VWL 77/5 IS VWL 127/5 IS
Rated voltage 230 V
230 V 1~/N/PE
(+10%/- 15%), 50 Hz
Rated voltage 400 V
400 V 3~/N/PE
(+10%/- 15%), 50 Hz
Rated power, maximum 5,4 kW 5,4 kW 8,8 kW
Rated current, maximum , 230 V 23,5 A
Rated current, maximum , 400 V 14,5 A
IP rating IP 10 B
Heating circuit
Heating water temperature, 20 … 55 °C
minimum/maximum
Operating pressure, minimum 0,05 MPa (0,50 bar)
Operating pressure, maximum 0,30 Mpa (3,00 bar)

Installer's Quick Guide - aroTHERM split 02/2021 Back to main menu 31

 Heat pumps
•
Heat pumps for central heating

0020309852 • Installer‘s Quick Guide • aroTHERM split • 02/2021 • Technische und inhaltliche Änderungen vorbehalten • Angaben ohne Gewähr