Nibe UKV 20 Series Use and care manual

User and Installer
manual
NIBE UKV 20
20-500, 20-750, 20-1000
Accumulator tank
CHB EN 1743-1
431416

Table of Contents
41 Important information
62 For the User
73 For the Installer
144 Technical data
19Contact information
3Table of Contents |NIBE UKV 20

Safety information
This manual describes installation and service procedures
for implementation by specialists.
The manual must be left with the customer.
This appliance can be used by children
aged from 8 years and above and per-
sons with reduced physical, sensory or
mental capabilities or lack of experience
and knowledge if they have been given
supervision or instruction concerning use
of the appliance in a safe way and under-
stand the hazards involved. Children shall
not play with the appliance. Cleaning
and user maintenance shall not be made
by children without supervision.
Rights to make any design or technical
modifications are reserved.
©NIBE 2017.
Symbols
NOTE
This symbol indicates danger to person or ma-
chine .
Caution
This symbol indicates important information
about what you should observe when maintain-
ing your installation.
TIP
This symbol indicates tips on how to facilitate
using the product.
Marking
The CE mark is obligatory for most products sold
in the EU, regardless of where they are made.
CE
General
Serial number
The serial number can be found on top of the product.
Caution
Always give the product's serial number when
reporting a fault.
Recovery
Leave the disposal of the packaging to the in-
staller who installed the product or to special
waste stations.
Do not dispose of used products with normal
household waste. It must be disposed of at a
special waste station or dealer who provides this type of
service.
Improper disposal of the product by the user results in
administrative penalties in accordance with current legis-
lation.
NIBE UKV 20Chapter 1 | Important information4
1 Important information

Inspection of the installation
Current regulations require the heating installation to be inspected before it is commissioned. The inspection must
be carried out by a suitably qualified person.
DateSignatureNotesDescription
✔
Heating medium (page 13)
Shut off valves
Safety valve
5Chapter 1 | Important informationNIBE UKV 20

Maintenance
The safety valve in the system where the accumulator
tank is installed must be inspected regularly (about four
times a year) to prevent blockages.
To inspect the valve, open the safety valve manually and
check that water flows through the overflow pipe. If this
does not happen then the safety valve is defective and
must be replaced.
Emptying
1. If an immersion heater is installed, disconnect the
power to the accumulator tank.
2. Shut off the incoming cold water.
3. Open the drain connection, or the drain valve if fit-
ted.
During draining, air must be let into the accumulator
tank by opening a vent valve or a hot water connection.
To ensure that the accumulator tank drains completely,
a hose or a pipe with an outlet below the lowest level
of the water heater must be attached to the drain con-
nection or drain valve. When installed where there is a
risk of frost, the accumulator tank must be emptied
whenever it is not in operation. Freezing could result in
the accumulator tank bursting.
Service
For service, contact the installer. The serial number (PF3)
(14 digits) and installation date should always be stated.
Only replacement parts supplied by NIBE may be used.
NIBE UKV 20Chapter 2 | For the User6
2 For the User

General
NIBE UKV 20 is an accumulator tank that is suitable for
connection to a heat pump or other external heat source.
NIBE UKV 20 can have several different areas of applica-
tion, and can be used during external control of the
heating system.
The heat pump then charges NIBE UKV 20 with floating
or fixed condensing. The external control function con-
trols the heat distribution from NIBE UKV 20 to the con-
sumer. If the flow to the heating system can be restricted
using radiator thermostats, for example, install a
NIBE UKV 20 as an intermediate tank. This ensures a se-
cure flow for the heat pump. NIBE UKV 20 also allows a
greater flow to the heating system than across the heat
pump. In some installations, so-called heat spikes occur
as a result of movements during temperature changes.
To eliminate temporary temperature changes, and
thereby prevent heat spikes, install a NIBE UKV 20 after
the heating installation.
The water tank consists of a high-quality steel jacket, the
outside of which is coated with rust-protection paint.
UKV 20-500 is designed and manufactured for a maxim-
um cut-off pressure of 6 bar in the water tank. UKV 20-
750 and UKV 20-1000 is designed and manufactured
for a maximum cut-off pressure of 3 bar in the water
tank. Maximum permitted temperature is 85 °C. All
NIBE UKV 20 are equipped with a temperature gauge,
which can be installed at various levels in the accumulat-
or tank.
UKV 20-750 and UKV 20-1000 are equipped with a
special pressure gauge. This gauge is located on the left
side of the accumulator tank and is tasked with prevent-
ing the stratification of the water in the accumulator
tank.
The insulation is polyurethane, which provides excellent
heat insulation. The insulation and grey plastic outer
cladding can be removed to make it easier to move the
water heater through doorways, for example.
NIBE UKV 20 is equipped with an immersion heater
socket and a submerged tube for controlling hot water
heating.
UKV 20-750 and UKV 20-1000 can be equipped with an
immersion heater and UKV 20-500 can be equipped with
up to two immersion heaters.
Transport
NIBE UKV 20 should be transported and stored vertically
in a dry place. The NIBE UKV 20 may, however, be care-
fully laid on its back when being moved into a building.
R
0
+2
0
-2
1
R
0
HMflow 49(50)°C
Hotwater
51°C
+2
0
-2
1
R
0
HMflow
49(50)°C
Hotwater
51°C
R
0
R
0
+2
0
-2
1
R
0
HMflow 49(50)°C
Hotwater
51°C
+2
0
-2
1
R
0
HMflow
49(50)°C
Hotwater
51°C
R
0
Assembly
NIBE UKV 20 must only be installed vertically.
The accumulator tank must be installed in a dry area at
a temperature that does not drop below 0 °C.
Position NIBE UKV 20 on a firm base that can take the
weight, preferably on a concrete floor or foundation.
Use the product's adjustable feet to obtain a horizontal
and stable set-up.
Ensure that there is sufficient space to perform servicing
and maintenance.
0-15 mm
7Chapter 3 | For the InstallerNIBE UKV 20
3 For the Installer

Component location and pipe
connections
UKV 20-750 and UKV 20-1000UKV 20-500
UL1
PF3
XL2
XL47
XL46
XL1
XL9
UA1
XL42
UA2
XL41
UA3
XL54
XL8
QM25
XL35
UL1
PF3
XL1
XL35
XL2 XL35
UA2
UA3
XL8
XL54
QM25
XL9
UA1
Dimensions of conn.NameDesignation
UKV 20-750
/20-1000
UKV 20-500
int. 1½"Connection, HP, SupplyXL1
int. 1½"Connection, HP, ReturnXL2
int. 1½"Docking connection, heating system, supplyXL8
int. 1½"Docking connection, heating system, returnXL9
int. 2"Connection, immersion heaterXL35
int. 2"Docking connection, level 1XL41
int. 2"Docking connection, level 2XL42
int. 2"Docking connection, level 3XL46
int. 2"Docking connection, level 4XL47
int. Ø 10 mmConnection, measurement point (thermometer)XL54
int. ¾"Valve, bleedingQM25
int. Ø 16 mmSubmerged tube, dockingUA1
int. Ø 16 mmSubmerged tube, dockingUA2
int. Ø 16 mmSubmerged tube, dockingUA3
Adjustable feetUL1
Serial number platePF3
NIBE UKV 20Chapter 3 | For the Installer8

Removing the insulation
The insulation can be removed to facilitate handling in
confined spaces.
■Remove the temperature gauge and the covers over
the immersion heater connections.
■Lift off the top cover and remove the insulation at the
top.
■Remove the covers over the connections and the cover
discs.
■Undo all the screws along the joining plate on all parts
of the jacket.
■Remove the insulated jacket.
■Remove the four insulated jacket sections; the outer
diameter of the accumulator tank decreases by 100
mm without the insulated jackets.
When the accumulator tank has been placed in the cor-
rect location, reinstall the removed components in the
reverse order.
Finally, fit all the supplied cover discs on the relevant
connections by pressing them over the connections.
NOTE
Fit the cover discs before the pipe installation
is made.
9Chapter 3 | For the InstallerNIBE UKV 20

Installation
The accumulator tank must be installed in an upright
position. The three feet are height-adjustable.
All connections (including connections or holes that are
not used) must be insulated to minimise energy losses.
NIBE UKV 20 can be equipped with the following ele-
ments, connection dimension G50. When installing the
water heater, ensure that there is enough room in front
of the connection area to remove the element, see fol-
lowing table.
Immersion heaters
Free spaceOutputElement
250 mm1500 WIU 31
260 mm2250 WIU 33
280 mm3000 WIU 34
400 mm4500 WIU 36
400 mm6000 WIU 39
400 mm7500 WIU 310
400 mm9000 WIU 311
NIBE UKV 20Chapter 3 | For the Installer10

Dockings
Volume and flow equaliser
For multi-occupancy buildings, industrial halls or similar.
When the system volume in the climate system is below 20 l/kW (heat pump output at 7/45 °C) and/or the flow is
choked uncontrolled, a UKV tank is installed as a volume and flow increaser.
Volume increase as well as reduction of heat spikes
For houses.
When the system volume in the climate system is below 20 l/kW (heat pump output at 7/45 °C) and/or the flow is
choked uncontrolled, a UKV tank is installed as a volume increaser.
A UKV tank is installed to reduce heat spikes in the climate system.
11Chapter 3 | For the InstallerNIBE UKV 20

Flow equaliser as well as reduction of heat spikes
For houses.
When the system volume in the climate system is below 20 l/kW (heat pump output at 7/45 °C) and/or the flow is
choked uncontrolled, a UKV tank is installed as a flow increaser.
A UKV tank is installed to reduce heat spikes in the climate system.
Diagram for charging the hot water production
BT6
BT7
AA5
GP11
VVC
VV
KV
For multiple-occupancy properties.
NOTE! These are outline diagrams. Actual installations must be planned according to applicable standards.
NIBE UKV 20Chapter 3 | For the Installer12

Pipe installation
Pipe installation must be carried out in accordance with
current norms and directives.
The drain valve is installed on the heating system’s return
line (XL9).
The system where UKV 20-500 is installed must be sup-
plied with a safety valve of max. 6 bar (0.6 MPa), and the
system where UKV 20-750 or UKV 20-1000 is installed
must be supplied with a safety valve of max. 3 bar (0.3
MPa). The overflow pipe must be the same size as the
safety valve. Route the overflow pipe from the safety
valve, sloping along its entire length, and ensure that it
is frost proof. The mouth of the overflow pipe must be
visible and not placed close to electrical components.
Filling
Fill the accumulator tank as follows:
1. Open the vent valve (QM25) at the top of the accu-
mulator tank.
2. Fill the vessel through the drain valve.
3. When only water comes out of the vent valve (ini-
tially an air-water mixture comes out of the valve),
the vent valve can be closed the accumulator tank
is filled.
Electrical installation
NOTE
Electrical installation and service must be car-
ried out under the supervision of a qualified
electrician, and in accordance with applicable
electrical safety regulations.
UKV 20-750 and UKV 20-1000 can be equipped with an
immersion heater and UKV 20-500 can be equipped with
up to two immersion heaters.
Each immersion heater is supplemented with junction
box type K11 (2-pole thermostat, 3-pole temperature
limiter). Do not modify or reconnect! A separate supply
from group central is routed to each immersion heater.
NOTE
The accumulator tank must be completely filled
with water before it can be connected on the
electrical side.
13Chapter 3 | For the InstallerNIBE UKV 20

Dimensions
UKV 20-750UKV 20-500
21 -0/+15
100
498
528
1028
1548
100
708
1023
1213
1393
1773
2010
558
1400
350
967
21 -0/+15
357
387
897
1277
1437
1855
547
Insulator end panel NIBE UKV 20UKV 20-1000
A
B
533
563
1063
1583
115
743
1058
1248
1428
1828
2078
593
21 -0/+15
115
BAModel
856852mmUKV 20-500
10001020mmUKV 20-750
11101130mmUKV 20-1000
NIBE UKV 20Chapter 4 | Technical data14
4 Technical data

Technical specifications
UKV 20-1000UKV 20-750UKV 20-500Type
85°CMax. temperature in the tank
36(bar)Max. working pressure in the tank
200170110kgWeight
085 003085 002080 014Part No.
Energy labelling
NIBESupplier
UKV 20-1000UKV 20-750UKV 20-500Model
C
Energy efficiency class
14012398WHeat loss
992741496lVolume
Accessories
Not all accessories are available on all markets.
Immersion heater IU
Immersion heater IU 31 - IU 311
See table
See table (page 10)
Connection box K11
Connection box with thermostat and overheating protec-
tion. (When connecting Immersion heater IU)
Part no. 018 893
15Chapter 4 | Technical dataNIBE UKV 20

Contact information
KNV Energietechnik GmbH, Gahberggasse 11, AT-4861 Schörfling
Tel: [phone] E-mail: [email protected] www.knv.at
AT
NIBE Wärmetechnik c/o ait Schweiz AG, Industriepark, CH-6246 Altishofen
Tel: [phone] E-mail: [email protected] www.nibe.ch
CH
Druzstevni zavody Drazice s.r.o, Drazice 69, CZ - 294 71 Benatky nad Jizerou
Tel: [phone] E-mail: [email protected] www.nibe.cz
CZ
NIBE Systemtechnik GmbH, Am Reiherpfahl 3, 29223 Celle
Tel: [phone] E-mail: [email protected] www.nibe.de
DE
Vølund Varmeteknik A/S, Member of the Nibe Group, Brogårdsvej 7, 6920 Videbæk
Tel: [phone] E-mail: [email protected] www.volundvt.dk
DK
NIBE Energy Systems OY, Juurakkotie 3, 01510 Vantaa
Tel: [phone] E-mail: [email protected] www.nibe.fi
FI
NIBE Energy Systems France Sarl, Zone industrielle RD 28, Rue du Pou du Ciel, 01600 Reyrieux
Tel : [phone] E-mail: [email protected] www.nibe.fr
FR
NIBE Energy Systems Ltd, 3C Broom Business Park, Bridge Way, S419QG Chesterfield
Tel: [phone] E-mail: [email protected] www.nibe.co.uk
GB
NIBE Energietechniek B.V., Postbus 634, NL 4900 AP Oosterhout
Tel: [phone] E-mail: [email protected] www.nibenl.nl
NL
ABK AS, Brobekkveien 80, 0582 Oslo, Postadresse: Postboks 64 Vollebekk, 0516 Oslo
Tel: [phone] E-mail: [email protected] www.nibe.no
NO
NIBE-BIAWAR Sp. z o. o. Aleja Jana Pawła II 57, 15-703 BIALYSTOK
Tel: [phone] E-mail: [e-mail] www.biawar.com.pl
PL
© "EVAN" 17, per. Boynovskiy, RU-603024 Nizhny Novgorod
Tel: [phone] E-mail: [email protected] www.nibe-evan.ru
RU
NIBE AB Sweden, Box 14, Hannabadsvägen 5, SE-285 21 Markaryd
Tel: [phone] E-mail: [email protected] www.nibe.se
SE
For countries not mention in this list, please contact Nibe Sweden or check www.nibe.eu for more information.

WS name: -Gemensamt
WS version: a434
WS release date: 2017-10-23 10:36
Publish date: 2017-10-23 10:39
NIBE AB Sweden
Hannabadsvägen 5
Box 14
SE-285 21 Markaryd
info @nibe.se
www.nibe.eu
431416