Nibe UKV 20-220 User manual

Installa on and Opera ng Manual
Bu er tanks:
20-220
20-300
20-500
20-750
20-1000
UKV
UKV
UKV
UKV
UKV
29.01.2016
25617

2
Buer tanks
UKV 20-220/300/500/750/1000
All installaon diagrams in this manual do not replace the system design; they can only be used for illustrave purposes. The
product is not intended for use by persons with reduced physical tness/mental eciency or without sucient experience and
knowledge, if they are not supervised or instructed by a person responsible for their safety. Operaon of the product by children
is strictly prohibited.
We reserve the right to make the product design changes and changes in the manual.
©NIBE 2016

3
Buer tanks
UKV 20-220/300/500/750/1000
CONTENT
CONTENT:
1. GENERAL ........................................................... 4
1.1 Introducon .........................................................4
1.2 Intended Use .......................................................4
2. DESIGN .............................................................. 5
3. INSTALLATION.................................................... 7
3.1 Locaon of the Tank ............................................7
3.2 Housing Disassembly ...........................................7
3.3 Installaon Requirements ...................................8
4. CONNECTION AND START-UP ............................. 9
4.1 Connecon ..........................................................9
4.2 Start-Up ...............................................................9
4.3 Thermal Insulaon of the System ........................9
4.4 Frost Protecon ...................................................9
4.5 Warnings and Praccal Recommendaons .......10
5. SERVICE ........................................................... 10
6. RECYCLING AND DISPOSAL............................... 10
7. TECHNICAL DATA.............................................. 10
7.1 Dimensions ........................................................11
8. WARRANTY TERMS & CONDITIONS.................. 14

4Bu er tanks
UKV 20-220/300/500/750/1000
1. GENERAL
1.1 Introduc on
Thank you for your con dence and choice of equipment by
NIBE. To fully bene t from the advantages of this product, ple-
ase read this Manual before using it, and in par cular chap-
ters rela ng to the applica on, installa on and maintenance,
and warranty. Please keep this Manual in a safe place for fu-
ture reference.
1.2 Intended Use
Fig. 2 UKV 20-500 bu er tank.
Fig. 3 UKV 20-750 bu er tank.
Fig. 1 UKV 20-220 bu er tank.
Buff er tanks are designed to heat up and supply water
for domes c purposes. Any inappropriate use, not in
compliance with its intended use is not permi ed. Ne-
ither manufacturer nor supplier shall be responsible for
damages resul ng from this.
CAUTION
INSTALLATION AND OPERATING MANUAL
Sec ons of the Manual rela ng to the installa on, in-
spec on and maintenance are intended for the quali-
 ed installer.
CAUTION
The manufacturer shall not be held liable for any da-
mages caused by failure to comply with the recommen-
da ons and observa ons contained in this Manual.
CAUTION
Bu er tanks are used for storage and transfer of energy conta-
ined in the hea ng medium. The accumulated energy is trans-
ferred to the hea ng system. Bu er tanks can operate with a
variety of heat sources in central hea ng systems such as heat
pumps, solid fuel boilers, solar hea ng systems, etc.
When used in the system containing a solid fuel- red boiler,
the low capacity tank improves the uniform heat removal. It
reduces the amount of  re ups and addi onally enables the
boiler opera on at the design power ra ng. This also enhan-
ces the e ciency and life of the boiler. NIBE bu er tanks ena-
ble opera on with virtually any type of central hea ng sys-
tem. During the installa on and opera on, always follow the
instruc ons in this Manual.

5
Bu er tanks
UKV 20-220/300/500/750/1000
2. DESIGN
Bu er tanks with a capacity of 750 and 1000 litres are equip-
ped with a special bar (gate) located on the le side of the
tank, whose task is to provide layered arrangement of the he-
a ng medium in the tank.
Fig. 4 Sec on of the UKV 20-220 bu er tank
Fig. 5 Sec on of the UKV 20-300/20-500 bu er tank
Fig. 6 Side view of the UKV 20-220 bu er tank
Fig. 7 Side view of the UKV 20-300 and UKV 20-500 bu er tank
1
1
3
3
5
5
5
5
7
7
5
5
8
8
10
10
11
11
12
12
13
13
13
1. Vent.
2. Upper tank insula on.
3. Connector pipe (hea ng system supply).
4. Connector pipe (supplying from the heat source).
5. Temperature sensor cover.
6. Steel tank.
7. Tank insula on.
8. Connector pipe (return from the hea ng system).
9. Connector pipe (return to the heat source).
10. Lower tank insula on.
11. Adjustable foot.
12. Thermometer
13. Connector pipe for moun ng electric hea ng unit.
14. Tank cover.
4
4
2
2
9
9
6
6
All products are ready for the installa on of a hea ng
unit containing an electric heater with thermostat and
thermal switch.
Informa on
INSTALLATION AND OPERATING MANUAL
14
14
UKV Bu er tanks by NIBE are made of high quality steel she-
et, coated on the outside with an -corrosion paint. Specially
selected tank insula on provides excellent thermal insula on
proper es of these devices. All devices in the Series are in
aesthe c plas c body and are equipped with a Temperature
gauge. Tanks have connector pipes and temperature sensor
covers for moun ng the sensor and temperature measure-
ment at di erent levels in the tank, as well as connectors for
moun ng an electrical hea ng unit.

6Bu er tanks
UKV 20-220/300/500/750/1000
INSTALLATION AND OPERATING MANUAL
Fig. 8 Sec on of the UKV 20-750 and 20-1000 bu er tank
1
3
10
10
5
5
5
7
8
12
13
1. Vent.
2. Upper tank insula on.
3. Connector pipe (hea ng system supply).
4. Connector pipe (supplying from the heat source).
5. Temperature sensor cover.
6. Steel tank.
7. Tank insula on.
8. Connector pipe (return from the hea ng system)..
4
10
11
10
2
9
6
Fig. 9 Side view of the UKV 20-750 and UKV 20-1000 bu er tank
14
15
9. Connector pipe (return to the heat source).
10. Connector pipe.
11. Water gate.
12. Lower tank insula on.
13. Adjustable foot.
14. Thermometer
15. Connector pipe for moun ng electric hea ng unit.
16. Tank cover.
16

7
Bu er tanks
UKV 20-220/300/500/750/1000
3. INSTALLATION
3.1 Loca on of the Tank
0-15 mm
Fig. 10 Levelling the unit.
3.2 Housing Disassembly
Removable housing with thermal insula on facilitate trans-
port and installa on of the tank. Disassembly the housing in
the following order (see Fig. 11):
A er the installa on of the tank in its  nal loca on, reinstall
the removed components in the reverse order.
Fig. 11 Housing disassembly
1. Remove the Temperature gauge and plugs of the hea ng
element connector pipes.
2. Remove the upper cover of the housing together with
thermal insula on.
3. Remove the plugs from the connector pipes and black
bushings.
4. Remove the  xing screws and the strip connec ng the
housing jacket.
5. Remove the jacket surrounding the tank (housing jacket.)
6. Remove the four-piece thermal insula on.
1
2
3
4
5
6
Bu er tanks of UKV Series should be installed in a dry area,
protected against temperatures below 0°C (e.g. in the base-
ment, boiler room, etc.). Loca on and manner of installa on
must ensure trouble-free maintenance and servicing of the
unit in the future.
Select the device loca on in a way allowing the ra onal ro-
u ng of the central hea ng system. We recommend installa-
 on of the bu er tanks in the immediate vicinity of the main
heat source in order to avoid unnecessary heat losses. Consi-
der the  lled tank weight when selec ng its loca on as well as
free space above and on the sides of the bu er tank required
to perform maintenance and inspec ons of the unit.
The tank stands on three adjustable feet that can be adjusted
within the range from 0 to 15 mm to level the tank.
INSTALLATION AND OPERATING MANUAL

8Bu er tanks
UKV 20-220/300/500/750/1000
3.3 Installa on Requirements
Installa on and commissioning of the buff er tank shall
only be done by appropriately quali ed installer. The
installer should inform the user of the func ons of the
product and provide the necessary informa on on its
safe use.
CAUTION
Bu er tanks Series UKV can be connected to open or closed
central hea ng systems. Pressure in the C/H system may not
exceed the max opera ng temperature of the unit (for the
allowable opera ng parameters of the units, see Table 2 Tech-
nical data.) Connect the bu er tank in accordance with the
installa on diagram. Remember to install the appropriate
safety valves.
In closed systems, use of a safety with blow-off pressu-
re not exceeding the max opera ng pressure of the
unit is mandatory (for the max opera ng pressures of
the units, see Table 1 Technical data.)
CAUTION
Water can drip from the safety valve, which is normal
and you should never prevent it, since blocking of the
safety valve can cause a threat to the user’s safety.
CAUTION
Open System
UKV bu er tanks can be included in an open C/H system pro-
tected in accordance with actual norms or standards of pro-
tec on.
Fig. 12 Diagram of the bu er tank installa on in an open system
1. Bu er tank.
2. Cut-o valve.
3. Drain valve.
4. Open expansion tank.
Closed System
Bu er tanks Series UKV can be connected to a closed C/H sys-
tem in accordance with relevant regula ons and standards.
Bu er tank opera ng in a closed circuit must be equipped
with correctly dimensioned safety valve (preferably in the he-
a ng medium return line to the hea ng source), with blow-
-o pressure not exceeding the max opera ng pressure of the
unit (for the max opera ng pressures of the units, see Table
1 Technical data.) Some amount of the hea ng medium can
leak from the safety valve during normal opera on, therefore,
you should install a drain line in the safety valve, allowing safe
drain of the hea ng medium to the sewerage or drain grate.
Safety valve drain line should be installed with a decline, in an
environment free of freezing and remain open to the atmos-
phere. NIBE is not responsible for  ooding the room through
the safety valve.
Installa on of necking of any kind (such as reducers,
dirt pockets, cut-off valves, etc.) between the safety
valve or open expansion tank and the buff er is not al-
lowed. Only a T-pipe with a drain valve and a T-pipe
with an expansion vessel may be installed in these line
sec ons.
CAUTION
Never use the equipment with clogged safety valves.
CAUTION
Check the opera on of the safety valve periodically as
described by the manufacturer of the valve in order to
check whether it is not clogged.
CAUTION
Fig. 13 Diagram of the bu er tank installa on in a closed system
1. Bu er tank
2. Cut-o valve
3. Drain valve
4. Safety valve
5. Expansion vessel
2
22
3
2
1
2
2 3
4
51
2
2
supply from the
heat source
return to the
heat source
supply from the
heat source
return to the
heat source
hea ng system
supply
return from the he-
a ng system
return from the he-
a ng system
hea ng system
supply
to sewerage
When connec ng the buff er tank to a closed C/H sys-
tem, you have to install an addi onal or increase capaci-
ty of the exis ng expansion vessel.
Informa on
to sewerage
4
The lower return connec ons to the hea ng source and
from the hea ng system can be connected in opposite
confi gura on.
Informa on
INSTALLATION AND OPERATING MANUAL

9
Bu er tanks
UKV 20-220/300/500/750/1000
4. CONNECTION AND START-UP
4.1 Connec on
4.2 Start-Up
A er connec ng all components of the C/H system, do the
following:
1. Fill up the C/H system with the hea ng medium.
2. Check  ghtness of all connec ons.
3. A er checking for  ghtness, insulate the pipelines to-
gether with the tank   ngs thoroughly.
4. Fill up the C/H system with the hea ng medium and vent
the system.
A er the installa on and levelling the tank, follow the pro-
cedure below (for the connector pipe numbers, refer to Fig.
4, 5, 6, 7, 8, 9 ):
Filling and ven ng the bu er tank:
Ensure that the en re C/H system is  lled with the he-
a ng medium before hea ng the system up for the  rst
 me or a er a longer break in its opera on.
CAUTION
4.3 Thermal Insula on of the System
In order to minimize thermal energy losses, insulate all con-
nector pipes, pipelines and temperature sensor covers tho-
roughly a er the installa on of the unit and performance of
the leak proof test. For this purpose, use thermal insula on
of correctly selected thickness and thermal insula on para-
meters.
Lack of thermal insula on, its incorrect thickness or in-
sula on made of inadequate materials will cause decre-
ase of thermal insula on proper es of the unit and the
system.
Informa on
You can  ll the bu er tank directly from the C/H system or
through the tank drain valve. Vent the tank and the C/H sys-
tem a er  lling them. Vent the unit through the vent installed
in the top head of the tank (see Fig. 14.)
A er comple on of the above steps, the system is ready for
opera on. You can use the facility hea ng system a er star-
 ng up the heat source and reaching the required temperatu-
re of the hea ng medium.
Switch OFF the hea ng units and wait un l the he-
a ng medium cools down completely in the C/H system
before ven ng the buff er tank.
CAUTION
4.4 Frost Protec on
If you plan to interrupt opera on of the unit and there is a risk
of freezing the hea ng medium in the tank, drain the tank and
the en re hea ng system associated with it completely.
Fig. 14 Ven ng the bu er tank
We recommend connec ng the tank connector pipes
with the system lines by means of unions to allow discon-
nec on of the tank, if required.
Informa on
INSTALLATION AND OPERATING MANUAL
The storage tank connec ons may not be made of
materials more precious than carbon steel due to the
increased electrochemical corrosion. This applies to
connector pipes (  ngs) contac ng the tank connec-
tor pipe thread. Preferably, use galvanized connector
pipes (  ngs.)
CAUTION
1. Remove protec ng plugs from the connector pipes.
2. Connect the supply line from the heat source (4).
3. Connect the return line to the heat source (9).
4. Connect the hea ng system supply line (3).
5. Connect the return line from the hea ng system (8).
6. Install the required temperature sensors (5).
7. If necessary, connect the electric hea ng unit to the con-
nector pipe (13) in UKV 20-300, 20-500 or (15) in UKV
20-750, 20-1000.

10
Buer tanks
UKV 20-220/300/500/750/1000
5. SERVICE
Report any malfuncons in the buer tank operaon to the
authorized service centres.
The tank may only be repaired / serviced by an au-
thorized service since improper repair can cause safety
risks, and the loss of product warranty.
CAUTION
Parameter U/m Tank model
UKV 20-220 UKV 20-300 UKV 20-500 UKV 20-750 UKV 20-1000
Energy eciency class -CCCCC
Storage volume (V)* l218,3 296,0 495,6 740,7 991,0
Standing loss (S)* W77,1 94,6 97,5 122,5 140,4
Max tank operang temp. °C 85
Max tank operang pressure bar 6
Electric heang module
connecon inch 2” female 2 x 2” female
2 x 2”
female 2” female 2” female
Weight kg 61 83 111 170 200
7. TECHNICAL DATA
6. RECYCLING AND DISPOSAL
According to the NIBE rules, the products have been manufac-
tured of high quality materials using the latest technologies
and soluons that do not endanger the environment.
When selecng materials, we took into account both the pos-
sibility of reuse of materials (recycling) that can be disassem-
bled and separated from materials unsuitable for recycling,
as well as risks arising from the processing of materials not
intended to reuse.
The purchased device consists in more than 90 % of parts that
can be recycled and reused, so they are safe for the environ-
ment and human health.
In order to prevent damage to piping systems and
environmental polluon, the product should only be
disassembled and taken out of service by appropriately
qualied specialists.
CAUTION
At end-of-life, take care that the product and all the
equipment were disposed of in accordance with appli-
cable regulaons.
CAUTION
The packaging, in which the product is delivered, is made
mainly of materials suitable for recycling and ulizaon.
Aer installaon, you should ensure the proper disposal
of packaging in accordance with applicable regulaons.
Informaon
Warnings:
• Never acvate circulaon of the heang medium unless
the buer tank is lled with the heang medium.
• Never operate the buer tank if you nd any malfuncon
in the safety valve operaon.
• Never install any device (such as cut-o and/or check
valves, etc.) between the tank and the safety valve or
open expansion tank (except T-pipes.)
• Any repairs of the buer tank by the user are forbidden.
• Stopping water leaks from the safety valve is not allowed.
Table 1. Technical data
• Limit the setpoints of the heang medium temperature
controllers in the buer tank supply lines to 85 °C.
• Check the operaon of the safety valve periodically as
described by the manufacturer of the valve in order to
check whether it is not clogged
• In order to eliminate any odour of hydrogen sulphide (caused
by bacteria in the oxygen decient water), we recommend
observing the periodic cleaning of the tank and replacement
of the anode and, in addion periodically increase the hot wa-
ter temperature in tank to prevent bacterial growth.
• Report any malfuncons in the buer tank operaon to
the authorized service centres. You can nd the complete
list of our authorized service centres
• Open the vent to vent the buer tank before the heang
season start.
• Check lling of the C/H system from me to me.
Praccal Recommendaons:
4.5 Warnings and Praccal Recommendaons
* Acc. to EU regulaons No. 812/2013 & 814/2013.
INSTALLATION AND OPERATING MANUAL
To prevent bacterial growth we recommend to make
sure a periodically increase of hot water temperature for
a shorter me at regular intervals e.g. every 14th day.
CAUTION

11
Bu er tanks
UKV 20-220/300/500/750/1000
INSTALLATION AND OPERATING MANUAL
7.1 Dimensions
F
F
E
E
D
D
L
L
N
N
M
M
J
J
K
K
H
H
I
I
G
D
D
E
E
F
F
G
H
H
I
I
J
J
K
K
L
L
O
O
W
W
Fig. 15 Dimensions of the UKV 20-220 bu er tanks
Fig. 16 Dimensions of the UKV 20-300, 20-500 bu er tanks

12 Bu er tanks
UKV 20-220/300/500/750/1000
Dimensions
UKV 20-220 UKV 20-300 UKV 20-500
Bmm 650 725 852
Cmm 625 702 856
Dmm 215 275 350
Emm 547 830 967
Fmm 1336 1253 1400
Gmm - 270 357
Hmm 247 376 387
Imm 457 460 547
Jmm 857 876 897
Kmm 1257 1194 1277
Lmm 1376 1309 1437
Omm 1650 1634 1834
Wmm 21 -0/+15
C
B
Table 2.Connector pipe diameters in the UKV 20-220, 20-300, 20-500 bu er tanks.
Table 3. Dimensions of the UKV 20-220, 20-300, 20-500 bu er tanks.
INSTALLATION AND OPERATING MANUAL
Connec on U/m Buff er tanks
UKV 20-220 UKV 20-300 UKV 20-500
DReturn to heat source inch 1 ½” female
EHea ng unit connec on inch 2” female
FSupply from heat source inch 1 ½” female
GHea ng unit connec on inch - 2” female
HReturn from hea ng system inch 1 ½” female
ITemperature sensor cover mm ø16 female
JTemperature sensor cover mm ø16 female
KTemperature sensor cover mm ø16 female
LSupply of the hea ng system inch 1 ½” female
MThermometer enclosure mm ø10 female
NVent inch ¾” female

13
Bu er tanks
UKV 20-220/300/500/750/1000
Connec on U/m Buff er tank
UKV 20-750 UKV 20-1000
DReturn to heat source inch 2” female
EConnector pipe inch 2” female
FHea ng unit connec on inch 2” female
GConnector pipe inch 2” female
HSupply from heat source inch 2” female
IReturn from hea ng system inch 2” female
JTemp. sensor enclosure mm ø16 female
KConnector pipe inch 2” female
LTemp. sensor enclosure mm ø16 female
MConnector pipe mm 2” female
NTemp. sensor enclosure mm ø16 female
OThermometer enclosure mm ø10 female
PHea ng system supply inch 2” female
NVent inch ¾” female
Dimensions
UKV 20-750 UKV 20-1000
Bmm 1020 1130
Cmm 1000 1110
Dmm 100 115
Emm 498 533
Fmm 528 563
Gmm 1028 1063
Hmm 1548 1583
Imm 100 115
Jmm 558 593
Kmm 708 743
Lmm 1023 1058
Mmm 1213 1248
Nmm 1393 1428
Pmm 1773 1828
Smm 2010 2078
Wmm 21 -0/+15
INSTALLATION AND OPERATING MANUAL
G
H
F
D
E
L
N
M
K
O
P
R
I
J
D
E
F
G
H
I
J
K
L
M
N
P
S
W
Fig. 17 Dimensions of the UKV 20-750, 20-1000 bu er tanks
Table 4.Connector pipe diameters in the UKV 20-750, 20-1000 bu er tanks.
Table 5. Dimensions of the UKV 20-750, 20-1000 bu er tanks.

14
Buer tanks
UKV 20-220/300/500/750/1000
NOTES
NOTES:

KNV Energietechnik GmbH, Gahberggasse 11, 4861 Schöring
Tel: [phone] Fax: [phone] E-mail: [e-mail] www.knv.at
AT
NIBEWärmetechnik c/o ait Schweiz AG, Industriepark, CH-6246 Alshofen
Tel: [phone] Fax: [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] Fax: [phone] E-mail: [email protected] www.nibe.cz
CZ
NIBE Systemtechnik GmbH, Am Reiherpfahl 3, 29223 Celle
Tel: [phone] Fax: [phone] E-mail: [email protected] www.nibe.de
DE
Vølund Varmeteknik A/S, Member of the Nibe Group, Brogårdsvej 7, 6920 Videbæk
Tel: [phone] Fax: [phone] E-mail: [e-mail] www.volundvt.dk
DK
NIBE Energy Systems OY, Juurakkoe 3, 01510 Vantaa
Puh: 09-274 697 0 Fax: [phone] E-mail: info@nibe. www.nibe.
FI
NIBE Energy Systems France Sarl, Zone industrielle RD 28, Rue du Pou du Ciel, 01600 Reyrieux
Tel : [phone] Fax : [phone] E-mail: [e-mail] www.nibe.fr
FR
NIBE Energy Systems Ltd, 3C Broom Business Park, BridgeWay, Chestereld S41 9QG
Tel: [phone] Fax: [phone] E-mail: [email protected] www.nibe.co.uk
GB
NIBE Energietechniek B.V., Postbus 634, NL 4900 AP Oosterhout
Tel: [phone] Fax: [phone] E-mail: [email protected] www.nibenl.nl
NL
ABK AS, Brobekkveien 80, 0582 Oslo, Postadresse: Postboks 64 Vollebekk, 0516 Oslo
Tel. sentralbord: [phone] E-mail: [email protected] www.nibeenergysystems.no
NO
NIBE-BIAWAR Sp. z o. o. Aleja Jana Pawła II 57, 15-703 BIAŁYSTOK
Tel: [phone] Fax: [phone] E-mail: [e-mail] www.biawar.com.pl
PL
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RU
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Tel: [phone] Fax: [phone] E-mail: [email protected] www.nibe.eu
For countries not menon in this list, please contact Nibe Sweden or check www.nibe.eu for more informaon.