WIKORA WBO 306 UNO Technical Document

© Wikora GmbH Page 1 As of 2/1/2019
Errors excepted.
WIKORA GmbH
Friedrichstr. 9
89568 Hermaringen
Phone: [phone]
Fax: [phone]
email: contac[email protected]
Installation manual
Operating instructions
DHW storage tank
WBO 306 UNO/DUO/H/WPSOL
Installation and commissioning must be
undertaken by a specialist.
General terms and conditions of warranty state that
all installations must be carried out by a suitably
trained and qualified plumber who observes the
local norms and regulations.
The installation and maintenance record must
be entirely completed and the user has to be
instructed accordingly.
Efficient operation can only be guaranteed if the
instructions of this manual are followed.
Warranty does not cover any damage caused due
to non-observance of this manual and the technical
rules in force.
The system is to be checked annually by a
specialized company. In addition, occurring defects
must be repaired immediately.
This document should be handed over to the
client on completion of the installation.
.
Index
1 General...................................................................................................................................................................................2
2 Transport and installation .......................................................................................................................................................2
3 Dimensions and connections..................................................................................................................................................3
4 Technical data ........................................................................................................................................................................4
5 Installation ..............................................................................................................................................................................5
6 Commissioning .......................................................................................................................................................................6
7 Maintenance and wear parts ..................................................................................................................................................6
8 Recycling and disposal...........................................................................................................................................................6
9 Warranties and guarantee......................................................................................................................................................7
10 Installation record...................................................................................................................................................................8

© Wikora GmbH Page 2 As of 2/1/2019
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1 General
Depending on the type and design, the tanks are suitable for heating and / or storing DHW and / or heating water. The heating
is achieved indirectly via heat generators, if applicable, from different heat sources. The maximum working pressure and
working temperature can be found in the technical data.
Set-up, installation and commissioning must be undertaken by a qualified specialist, who must observe these instructions.
The site of installation must be frost-protected according to DIN 4753 and should be in direct proximity to the heat
generator.
When setting-up and installing the tank, the following regulations should be considered:
In addition to the technical rules in force DIN 1988, DIN 18160, DIN 4753, DIN 4109, DIN 4708, DIN 4751 section 2-4 energy
conservation law and VDE regulations are to be observed. Moreover, the relevant regulations of the suppliers as well as legal
building regulations are to be considered.
DHW requirements:
•Minimum hardness:
- 2° dh (sum of alkaline earths 0,4 mmol/l)
•Conductivity
- if external current anode is used ≥ 100 µs/cm
- if Mg-anode is used 130 µs/cm – 1500 µs/cm
•pH-value according to Drinking Water Ordinance (6,5-9,5)
Important: The exhaust pipe must be at least as big as the safety valve outlet in width. It may not have more than 2 bends and
should not be longer than 2 m. If for any compelling reasons 3 bends or a length up to 4 m are required, then the entire exhaust
line must be designed one nominal size larger. More than 3 bends, or a length exceeding 4 m is prohibited. The exhaust pipe
must be installed with downward gradient. The drain line behind the funnel must feature at least the double width of the valve
entrance. A sign is to be attached close to the exhaust pipe of the safety valve or on the safety valve itself. „For safety reasons
water may leak from the exhaust pipe during the heating process! Do not lock! "The operability of the safety valve is to be
checked at regular intervals by means of de-ventilation.
2 Transport and installation
In order to prevent damage during transport, the packaging should only be removed at the site of installation. During shipment,
it should be ensured that the tank does not come in contact with any spiky or sharp items, nor is damaged through dropping or
knocks.
During installation, the tank must be disconnected from any humidity carrying components. Moreover, sufficient space for
maintenance and cleaning purposes should be kept free in front of, beside, above and behind the tank.
Important information for the specialist:
1. Screw the provided anode loosely in the corresponding socket before tank installation. Once the tank is filled
and vented, the anode must be screwed tightly and hermetically sealed.
2. If the tank is not equipped with an electric heating element, the corresponding IG 11/2“ socket must be sealed
on site with a red brass screw plug. Please remove the existing protection cap and replace it with this plug.
3. The sleeves IG ½ "for venting and emptying must be sealed with suitable plugs or venting / draining valves.
Please remove the existing protective caps and replace them with these plug or vent / drain valves.

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3 Dimensions and connections
Illustration1
Dimensions:
Type ∅d ∅D E F G H K L M N O R W B
[mm]
[mm]
[mm]
[mm]
[mm]
[mm]
[mm]
[mm]
[mm]
[mm]
[mm]
[mm]
[mm]
[mm]
WBO 306 UNO 500 700 215 1422 758 1770 858 243 - - 290 905 1750 105
WBO 306 DUO 500 700 215 1422 758 1770 1397 958 858 243 290 905 1750 105
WBO 306 H 35 500 700 215 1422 840 1170 940 243 - - 290 1040 1750 105
WBO 306 H 500 700 215 1422 758 1770 858 243 - - 290 905 1750 105
WBO 306 WPSOL 500 700 215 1422 758 1770 1397 958 858 243 290 905 1750 105
Chart1
W = Tilting dimension
Connections:
Type
WBO 306
UNO
WBO 306
DUO
WBO 306
H
WBO 306
H 35
WBO 306
WPSOL
Cold water / hot water
1/2
Ga
1
1
1
1
1
Circulation
3
Ga
¾
¾
¾
¾
¾
Aux boiler flow / return
4/5
Gi
1
1
5/4
5/4
5/4
Solar flow / return
6/7
Gi
-
1
-
-
1
Plug for electric heater
12
Gi
6/4
6/4
6/4
6/4
6/4
Inspection flange
14
NW
116
116
116
116
116
Sensor tube
15
Ømm
10
10
10
10
10
Anode
19
Gi
5/4
5/4
5/4
5/4
5/4
Vent / Drain
13/B
Gi
½
½
½
½
½
Chart 2
Ga = male thread
Gi = female thread
NW = nominal size

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4 Technical data
Description WBO 306
UNO
WBO306
DUO
WBO306
H
WBO 306
H 35
WBO 306
WPSOL
Storage volume (real) acc. to DIN EN 12897 [litre] 289 296 295 292 294
Max. working temperature DHW / Heating [°C] 95 / 130 95 / 130 95 / 110 95 / 110 95 / 110
Max. working pressure DHW / Heating [bar] 10 / 16 10 / 16 10 / 16 10 / 16 10 / 16
Capacity of heat exchanger lower / upper [litre] 8,6 8,6 / 5,7 19,5 22,7 8,6 / 13,5
Surface of heat exchanger lower / upper [m²] 1,45 1,45 / 0,85 3,00 3,5 1,45 / 2,1
Flow rate of heat exchanger lower / upper [m³/h] 2,4 2,4 / 2,4 2,4 2,4 2,4 / 2,4
Pressure drop of heat exchanger lower / upper [mbar] 48 48 / 42 22 25 48 / 13
Insulation [mm] 100 - Neopor / fleece
Performance lower heat exchanger
DHW 80 °C / 60 °C / 10 °C upper heat exchanger
[l/h (kW)] 560 (32) 560 (32)
350 (21) 1070 (62)
1111 ( 65 ) 560 (32)
844 (49)
Standing loss
[Watt
] 67 69 67 69 67
Willingness to heat Kwh/ 24h 1,61 1,67 1,61 1,67 1,61
Energyefficiency class B B B B B
Weight (empty) [kg] ca. 97 ca. 109 ca. 126 Ca. 135 ca.134
Chart 3

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5 Installation
All pipes connecting to the tank should have removable connections (fitting/flange). Pipe thread seals with teflon are
to be avoided.
All tank connecting pipes are to be planned, constructed and tested according to the technical rules in force, as well as to the
corresponding norms and regulations in accordance with their application and supply medium.
Appropriate filters should be used to prevent dirt or particles from entering the tanks. Moreover, the tank should be ensured
against pressure fluctuations and excess pressure through the installation of tested pressure reducing valves and safety
valves.
Sensors and thermostats necessary for temperature control must be securely and permanently positioned on the tank
(immersion sleeve and sensor rail).
The tank’s venting and draining facilities must have the appropriate dimensions and be correctly installed.
The installation company is responsible for the correct execution of work and for the safe and careful insulation of the pipes.
•When connecting to a solar plant, a temperature limiter is required and must be installed on site at the hot water outlet
in order to prevent scalding.
SF
SR
Connection Scheme (according to DIN 1988)
BR
BF
Water plug
Drain
CW
Circlation
HW
Pressure reducing valve
Test valve
Backflow preventer Manometer conn.
Stop valve
Stop valve
Safety group according to
DIN 1988
Drian pipe
Safety valve
HW
BF
Circulation
BR
Drain
Safety valve
Drain pipe
Connection Scheme (according to DIN 1988)
Stop valve
Manometer conn. Backflow preventer
Test valve
Pressure reducing valve
Safety group according to
DIN 1988
water pipe
Stop valve
CW
Illustration 2 (Schematic diagram)
The size of the DHW safety valve is shown below:
Content of DHW space
Min. valve size
Max. heating performance
up to 200 l
NW 15 (1/2“)
75 kW
above 200 to 1000 l
NW 20 (3/4“)
150 kW
Illustration 3 (Schematic drawing– example hydraulic system heating)

© Wikora GmbH Page 6 As of 2/1/2019
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6 Commissioning
Before putting into operation, the entire system should be flushed through. Particles in the system compromise the
operating reliability.
Fill the heating system slowly with water and vent all the air.
Open the cold water stop valve and all hot water nozzles. The hot water heat exchanger is full when water leaks out
of all hot water nozzles. Then close all nozzles again.
Start-up the heating system.
Set the DHW temperature and supervise the system while heating up.
While the System is heating up, water will leak out of the safety valve.
Before the handover of the system to the end user/owner, the plumbing contractor should ensure that the
system is tested to full load, controls are set and that pipe work and connections are without leaks. Afterwards,
the end user has to be instructed in the operation and handling of the tank, as well as the system. The instruction must
to be documented in the installation and maintenance record.,
Please note that the operation and lifetime of the system depend decisively on a regular maintenance.
7 Maintenance and wear parts
Regular maintenance increases the lifetime and operation reliability of the system. Decalcification at regular intervals may be
necessary in highly calcareous water areas.
1 . Close the cold water stop valve and drain the tank to check the inner tank as well as the heat exchanger. Disconnect any
electrical devices from the appliance. Then, carefully remove the insulation of the flange cover and unscrew the flange
cover. Limescale and rough residues can be crushed by a wooden bar. Only use an approved decalcifier. Screw the
flange cover hermetically after the cleaning process by using a new flange seal. Fill the tank and check all connections for
tightness. Finally, replace the insulation and, if necessary, remount the electrical devices accordingly.
A chemical decalcification can be carried out by a specialist using an approved decalcifier and taking the appropriate
precautions. Please note that the tank must be disconnected from the DHW installation (cold water / hot water /
circulation).
2. For protection purposes, the tank is equipped with a magnesium protection anode. Its transmission depends on the local
water properties. It should be examined for the first time after 2 years and afterwards annually in order to check its
transmission. The diameter should be at least 1/3 of the original diameter, the surface should be homogenous and without
any limescale crust. If necessary, it should be replaced by an original anode of the manufacturer to protect the tank
against corrosion.
2.a. Alternatively, the tanks can be equipped with an external current anode. Please note that a protection against
corrosion is only guaranteed if the anode is energized and connected accordingly.
If the protection anode is neglected, this can cause damage through corrosion and lead to a loss of warranty.
3. The safety valve protects the tank against excess pressure. The functional capacity must be checked at regular intervals
by venting. If an expansion vessel is used, the safety valve is not, or only rarely, required. Over a longer period of time
therefore, it can become blocked and not function when needed.
4. If there is a danger of freezing, the DHW tank should be permanently heated or completely emptied.
5. A damp cloth is sufficient to clean the outer parts. Please avoid using any abrasive or solvent cleaning agents.
8 Recycling and disposal
The products are specified and manufactured according to VDI 2243. The products are mechanically separable and 100%
recyclable. Make sure that the components are disposed according to the relevant regulations.

© Wikora GmbH Page 7 As of 2/1/2019
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9 Warranties and guarantee
The warranty for our products is based on the legal provisions of the general Civil Code and the Consumer Protection Act.
In addition, defective appliances are replaced within the framework of our full warranty within 1 year, as of the date of the
invoice, including the replacement, procurement and incidental costs. As far as our hot-water heaters and pressurized boilers
are concerned, the warranty amounts for 6 months, as of the date of the invoice.
Subsequent to the full warranty, defective tanks are replaced within the framework of our guarantee. The guarantee of the
different products and the conditions are shown in the table below.
All other claims are excluded. Repairs and costs which occur due to damage, inappropriate installation, chemical,
electrochemical or electrical influences, incorrect operation or improper manipulation, are excluded. Furthermore, the warranty
becomes invalid if th eappliance has been modified through the installation of externally supplied parts or through irregular
professional maintenance.
Subject to our general terms and conditions.
Legal
warranty
2 years
Guarantee
years*
Conditions
WBO T/ToF/TB/TOFB ●520 / 27
WBL ●520 / 27
WBO Uno ●520 / 27
WBO Duo ●520 / 27
WP/Sol ●520 / 27
WBO H ●520 / 27
GS ●520 / 27
Wikosol Twin ●10 27
Wikosol ●10 27
WPKR H Twin ●520 / 27
WPKR Twin ●520 / 27
WPKR ●520 / 27
WPK ●520 / 27
WPH-FW (tank) ●527
WPR-FW (tank) ●527
WPS ●520 / 27
WPH ●5 -
WPR ●5-
WPRR ●5 -
WKS ●5 -
Cu-finned tube heat exchanger ●-27
Electric heating element ●- -
Conditions:
20
27
Coverage Germany:
Compliance with the limits of the valid DHW regulations(TrinkwV 2001), especially the limits in
accordance with Appendix 2, Part 1-2 and Appendix 3
Coverage EU :
Compliance with the limits of the EG-Regulations 83/98
* Start of guarantee at date of invoice
Products
DHW storage tanks
Combi buffer tanks
Buffer tanks
Tank accessories
Under condition that the limits of the valid DHW regulations have been respected, the anode has
been examined for the first time after 2 years and afterwards annually and that the anode has
been replaced by an original anode of the manufacturer (individual receipts needed) by a
specialized company.

© Wikora GmbH Page 8 As of 2/1/2019
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10 Installation record
The installation has been completed according to DIN and the technical rules in force. In addition, the customer has received
instruction concerning the operation and maintenance.
Place……………………………………………….. Date…………………………………………………………
Customer Installer
……………………………………………………. ……………………………………………………………….
Signature Signature
Place of installation: ………………………………………………………………………………………………………………………
Name: ……………………………………………………………………………………………………………………...
ZIP Code/Place: …………………………………………………..………………………………………………………………….
Street: ……………………………………………………………………...………………………………………………
Phone: ……………………………………………………………………………...……………………………………...
Tank model: ………………………………. Serial number …………….………………..………………
Date of invoice ………………………………………………………...…………………………………………………………..
Anode maintenance record
Date
Visual examination
of anode
Exchange of
anode
Signature + stamp of installer
In the case of reclamation, the receipts for maintenance must be provided as proof. Please complete the data sheet, including
the reason for reclamation, and submit to Wikora.
Submitting the maintenance record does not ensure any promise of guarantee or claim.