Nibe UKVS 20-300 User manual

Installa on and Opera ng Manual
Bu er Tank with Coil
22.02.2016
25618
20-300
20-500
20-750
20-1000
UKVS
UKVS
UKVS
UKVS

2Buer tank with coil
UKVS 20-300/1000
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

3Buer tank with coil
UKVS 20-300/1000
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......................................... 11
7.1 Dimensions ...................................................11
8. WARRANTY TERMS & CONDITIONS............. 14

4Bu er tank with coil
UKVS 20-300/1000
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
Bu er tanks with coil can be used for storage and transfer of
energy contained in the hea ng medium. The accumulated
energy is transferred to the hea ng system. The coil can re-
ceive heat from a separate hea ng system. Bu er tanks can
operate with a variety of heat sources in central hea ng sys-
tems such as heat pumps, solid fuel boilers, solar hea ng sys-
tems, etc.
When used in the system containing a solid fuel- red boiler,
the bu er tank allows uniform heat removal for a longer pe-
riod of opera on of the boiler, which reduces the amount of
 re ups and addi onally enables the boiler opera on at the
design power ra ng. This also enhances the e ciency and
life of the boiler. NIBE bu er can operate with virtually any
central hea ng system. During the installa on and opera on,
always follow the instruc ons given in this Manual.
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
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
Fig. 1 UKVS 20-300/500 bu er tank.
Fig. 2 UKVS 20-750/1000 bu er tank.

5Bu er tank with coil
UKVS 20-300/1000
2. DESIGN
UKVS bu er tanks with coil by NIBE are made of high quality
steel sheet, 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 Tempe-
rature gauge. Tanks have connector pipes and temperature
sensor covers for moun ng the sensor and temperature me-
asurement at di erent levels in the tank, as well as connectors
for moun ng an electrical hea ng unit. The built-in coil allows
combina on of open and closed central hea ng systems or
systems using di erent hea ng media (e.g. water and glycol.)
Fig. 3 Sec on of the UKVS 20-300/500 bu er tank Fig. 4 Side view of the UKVS 20-300/500 bu er tank
1
3
5
5
8
7
5
9
11
12
13
14
15
15
Descrip on:
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. Coil supplying connector pipe
8. Tank insula on
9. Connector pipe (return from the hea ng system)
10. Connector pipe (return to the heat source)
11. Connector pipe, return from the coil
12. Lower tank insula on
13. Adjustable foot
14. Thermometer
15. Connector pipe for moun ng electric hea ng unit
4
2
10
6
INSTALLATION AND OPERATING MANUAL
Bu er tanks with coil with a capacity of 750 and 1000 litres
are equipped with a special bar (gate) located on the le side
of the tank, whose task is to provide layered arrangement of
the hea ng medium in the tank.
All products are ready for the installa on of a hea ng
unit containing an electric heater with thermostat and
thermal switch.
Informa on

6Bu er tank with coil
UKVS 20-300/1000
1
3
5
5
8
7
7
5
10
12
14
15
16
4
7
9
7
2
11
13
6
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. Connector pipe
8. Coil supplying connector pipe
9. Tank insula on
10. Connector pipe, return from the coil
11. Connector pipe (return to the heat source)
12. Connector pipe (return from the hea ng system)
13. Lower tank insula on
14. Adjustable foot
15. Thermometer
16. Connector pipe for moun ng electric hea ng unit
Fig. 5 Sec on of the UKVS 20-750/1000 bu er tank Fig. 6 Side view of the UKVS 20-750/1000 bu er tank
INSTALLATION AND OPERATING MANUAL

7Bu er tank with coil
UKVS 20-300/1000
3. INSTALLATION
3.1 Loca on of the Tank
Bu er tanks of UKVS 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 rou ng of the central hea ng system. We recom-
mend installa on of the bu er tanks in the immediate vicinity
of the main heat source in order to avoid unnecessary heat
losses. Consider 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.
0-15 mm
Fig. 8 Housing disassembly
1
2
3
4
5
6
Fig. 7 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.
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.
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 tank with coil
UKVS 20-300/1000
3.3 Installa on Requirements
Bu er tanks with coils Series UKVS 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 Ta-
ble 1 Technical data.)Connect the bu er tank in accordance
with the installa on diagram. Remember to install the ap-
propriate safety valves.
1. Bu er tank
2. Cut-o valve
3. Drain valve
4. Pump unit (to be installed either in the supply
line or in the return line from the coil)
5. Strainer
6. Open expansion tank
Closed System
Bu er tanks with coils Series UKVS can be connected to a clo-
sed C/H system in accordance with relevant regula ons. Buf-
fer tank opera ng in a closed circuit must be equipped with
correctly dimensioned safety valve (preferably in the hea 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.
1. Bu er tank
2. Cut-o valve
3. Drain valve
4. Strainer
5. Pump unit (to be installed either in the supply line or in
the return line from the coil.)
6. Safety valve
7. Expansion vessel
2
22
2 24 5
3
2
2
1
5
supply from the
heat source
hea ng system
supply
coil supply
return from
the coil
return to the
heat source
return from the he-
a ng system
6
1
2 2
2
2 245
2
2
3
7
6
return to the
heat source
to sewerage
coil supply
return from
the coil
to sewerage
supply from the
heat source
hea ng system
supply
return from the he-
a ng system
Installa on and commissioning of the buff er tank with
coil shall only be done by appropriately quali ed instal-
ler. The installer should inform the user of the func ons
of the product and provide the necessary informa on
on its safe use.
CAUTION
Open System
UKVS bu er tanks can be included in an open C/H system
protected in accordance with actual norms or standards of
protec on.
Fig. 9 Diagram of the bu er tank installa on in an open system
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
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
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
Fig. 10 Diagram of the bu er tank installa on in a closed system
INSTALLATION AND OPERATING MANUAL

9Bu er tank with coil
UKVS 20-300/1000
4. CONNECTION AND START-UP
4.1 Connec on
1. Connect the supply line from the heat source (4)
2. Connect the return line to the heat source (10 in UKVS
20-300/500, or 11 in UKVS 20-750/1000)
3. Connect the hea ng system supply line (3)
4. Connect the return line from the hea ng system (9 in
UKVS 20-300/500, or 12 in UKVS 20-750/1000)
5. Connect the coil supply line, (7) in UKVS 20-300/500, or
(8) in UKVS 20-750/1000, and the return line from the
coil to the connector pipe (11) in UKVS 20-300/500, or
(10) in UKVS 20-750/1000.
6. Install the required temperature sensors (5)
7. If necessary, connect the electric hea ng unit to the con-
nector pipe (15) in UKVS 20-300/500, or (16) in UKVS 20-
750/1000.
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 proce-
dure below (for the connector pipe numbers, refer to Fig. 3,
4, 5 and 6):
Filling and ven ng the bu er tank:
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. 11.)
Fig. 11Ven ng the bu er tank
The coil can operate with almost any central hea ng system
or other heat source such as solar panels, heat pumps, etc.
However, when installing the coil, a en on should be paid to
the fact that the max pressure in the supply system may not
exceed the max opera ng pressure of the coil and that the
temperature of the hea ng medium in the system may not
exceed the allowable coil opera ng temperature. For the allo-
wable coil opera ng temperatures, see Table 1 Technical data.
Connec ng the Coil
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
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
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
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.
INSTALLATION AND OPERATING MANUAL

10 Buer tank with coil
UKVS 20-300/1000
4.5 Warnings and Praccal Recommendaons
• 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 periodi-
cally increase the hot water temperature in tank to pre-
vent bacterial growth.
• Report any malfuncons in the buer tank operaon to
the 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.
• In the systems with the electric heang unit, ensure that
the electrical installaon is properly protected by protec-
ve circuit.
• Limit the setpoints of the heang medium temperature
controllers in the buer tank supply lines to 80 °C in order
to avoid triggering of the thermal cut-o.
Praccal Recommendaons:
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.
• When heang with only the electric unit, the coil circuit
may not be isolated.
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
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
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

11Bu er tank with coil
UKVS 20-300/1000
Parameter U/m Bu er tank
UKVS 20-300 UKVS 20-500 UKVS 20-750 UKVS 20-1000
Energy effi ciency class -CCCC
Storage volume (V)* l282,3 480,7 723,2 964,8
Standing loss (S)* W92,9 97,5 125,0 139,6
Max tank opera ng temp. °C 85
Max coil opera ng temp. °C 110
Max tank opera ng pressure bar 6
Max coil opera ng pressure bar 16
Coil area m21,6 2,13 2,74 2,74
Electric hea ng module
connec on inch 2 x 2” female 2” female
Weight kg 114 154 230 250
7. TECHNICAL DATA
Table 1. Technical data
* Acc. to EU regula ons No. 812/2013 & 814/2013
7.1 Dimensions
F
E
D
N
M
P
O
I
K
L
J
H
G
D
E
F
GH
I
J
K
L
M
N
W
R
Fig. 12 Dimensions of the UKVS 20-300/500 bu er tanks
INSTALLATION AND OPERATING MANUAL

12 Bu er tank with coil
UKVS 20-300/1000
Connec on U/m Bu er tank
UKVS 20-300 UKVS 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 coil inch 1” male
IReturn from hea ng system inch 1 ½” female
JTemperature sensor cover mm ø16 female
KSupply of coil inch 1” male
LTemperature sensor cover mm ø16 female
MTemperature sensor cover mm ø16 female
NSupply of the hea ng system inch 1 ½” female
OThermometer enclosure mm ø10 female
PVent inch ¾” female
C
B
Table 2. Connector pipe diameters in the UKVS 20-300/500 bu er tanks
Dimensions
UKVS 20-300 UKVS 20-500
B
mm
725 865
C718 854
D275 350
E830 962
F1253 1400
G270 357
H280 288
I376 289
J460 547
K784 805
L876 897
M1194 1277
N1309 1437
R1634 1834
W21 -0/+15
Table 3. Dimensions of the UKVS 20-300/500 N tanks
INSTALLATION AND OPERATING MANUAL

13Buer tank with coil
UKVS 20-300/1000
Dimensions
UKVS 20-750 UKVS 20-1000
B
mm
1020 1130
C1000 1110
D113 128
E511 526
F541 576
G1041 1076
H1561 1596
I113 128
J447 482
K571 606
L721 756
M890 925
N1036 1071
O1226 1261
P1406 1441
S1786 1841
U2023 2091
W21 -0/+15
Table 3. Dimensions of the UKVS 20-750/1000 tanks
H
G
F
D
E
N
O
P
T
S
R
I
K
L
M
J
DI
E
F
G
H
JK
L
M
N
O
P
W
S
U
Fig. 13 Dimensions of the UKVS 20-750/1000 tanks
Connecon U/m Buer tank
UKVS 20-750 UKVS 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
JReturn from coil inch 1” male
KTemp. sensor enclosure mm ø16 female
LConnector pipe inch 2” female
MCoil supply inch 1” male
NTemp. sensor enclosure mm ø16 female
OConnector pipe inch 2” female
PTemp. sensor enclosure mm ø16 female
RThermometer enclosure mm ø10 female
SHeang system supply inch 2” female
TVent inch ¾” female
Table 4.Connector pipe diameters in the UKVS 20-750/1000 buer tanks
INSTALLATION AND OPERATING MANUAL

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: inf[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: inf[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: inf[email protected] 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: inf[email protected] www.nibe.fr
FR
NIBE Energy Systems Ltd, 3C Broom Business Park, BridgeWay, Chestereld S41 9QG
Tel: [phone] Fax: [phone] E-mail: inf[email protected] www.nibe.co.uk
GB
NIBE Energietechniek B.V., Postbus 634, NL 4900 AP Oosterhout
Tel: [phone] Fax: [phone] E-mail: inf[email protected] www.nibenl.nl
NL
ABK AS, Brobekkveien 80, 0582 Oslo, Postadresse: Postboks 64 Vollebekk, 0516 Oslo
Tel. sentralbord: [phone] E-mail: pos[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
© „EVAN” 17, per. Boynovskiy, Nizhny Novgorod
Tel./fax [phone] E-mail: inf[email protected] www.nibe-evan.ru
RU
NIBE AB Sweden, Box 14, Hannabadsvägen 5, SE-285 21 Markaryd
Tel: [phone] Fax: [phone] E-mail: inf[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.