Okofen 600 User manual

Installation
manual
Accumulator 600–2000 liter
ENGLISH
PE590 EN

Title:
Article number:
Installation manual 600–2000 liter
PE590 EN 1.2
Version valid from:
Approved:
03/2021
Christian Wohlinger
Author
ÖkoFEN Forschungs- &
EntwicklungsgesmbH
A-4133 Niederkappel, Gewerbepark 1
Tel.: [phone] / 74 50
Fax.: [phone] / 74 50 – 210
E-Mail: oek[email protected]
www.oekofen.com
© by ÖkoFEN Forschungs- und EntwicklungsgesmbH
Subject to modifcations

Contents
1 Dear Customer 4
2 Intended use 5
3 Types of safety warning sign 6
4 Requirements for an accumulator 7
4.1 Guidelines and Standards for an accumulator 7
4.2 Manufacturer's Guidelines 8
4.3 Notices for correct operations 10
4.4 Installation Room 11
5 Product Description 12
5.1 Model Sizes - Technical Data 13
6 Transport and Placement 15
6.1 Transport 15
6.2 Notes on bringing the unit into the building 15
7 Installing the accumulator 16
7.1 Setting Up the accumulator 16
7.2 Mounting the thermowells 16
7.3 Removal of the accumulator tank insulation 17
7.4 Installing the Additional Cylinder 19
8 Connecting up the hydraulics 20
8.1 Connector Arrangement 20
8.2 Hydraulic Connection of the Secondary Return Line 23
9 Starting up for the first time 26
9.1 Checking the Leak Tightness 26
9.2 Filling 26
9.3 Settings 26
Contents

1 Dear Customer
Proficiency, innovation and quality combined. This is the tradition on which ÖkoFEN
shapes the future. We are very pleased that you too have decided to purchase a
product from ÖkoFEN.
•This manual is intended to help you operate the product safely, properly and eco-
nomically.
•Please read this manual right through and take note of the safety warnings.
•Keep all documentation supplied with this unit in a safe place for future reference.
Please pass on the documentation to the new user if you decide to part with the
unit at a later date.
•Please contact your authorised dealer if you have any questions.
ÖkoFEN attaches great importance to the development of new products. Our R&D
Department repeatedlychallenges the eectiveness of tried-and-tested systems and
works continuously on improvements. In thisway, we secure our technological advant-
age. We have already received many national and internationalawards for our prod-
ucts.
All our products comply with European standards in respect of quality, eciency and
emissions.
4 1 Dear Customer
Installation manual

2 Intended use
The ÖkoFEN hot water tank is designed for the heating and storage of heating and
domestic water in single or multi-family dwellings and commercial buildings. Use of
the ÖkoFEN hot water tank for other purposes is not permitted.
No reasonably foreseeable forms of misuse are known.
2 Intended use 5
Installation manual

3 Types of safety warning sign
The warning signs use the following symbols and texts.
Types of safety warning sign
1.Risk of injury
2.Consequences of risk
3.Avoiding risk
DANGER
Danger - indicates a situation that could lead to death or lifethreatening injury.
WARNING
Warning - indicates a situation that could lead life-threatening or serious injury.
CAUTION
Caution - indicates a situation that could lead to injury.
NOTICE
▶indicates a situation that could lead to property damage.
6 3 Types of safety warning sign
Installation manual

4 Requirements for an accumulator
4.1 Guidelines and Standards for an accumulator
The current versions of the relevant national standards must be observed.
Austria – H 5195-1, published 01/12/2010
Prevention of damage in closed-circuit hot water heating systems.
•Contamination:
Dirt and other contaminants represent significant contributory factors to corro-
sion. The introduction of contamination into the heating system must therefore
be prevented. This must be taken into consideration as early as the planning
stage.
•The operator of the heating system is responsible for conducting tests on the
condition of the heating water.
•Such tests must be conducted no less than every 2 years on heating systems with
a water capacity of up to 5000 litres and no less than once a year on systems
with a capacity of over 5000 litres.
•Flushing water:
The water used for flushing the system prior to initial startup or re-commissioning
must be clear, odourlessand free of suspended matter below 25 µm.
•A system report must be prepared for every system after initial startup and re-
commissioning.
•Replenishing water must be odourless and free of suspended matter below 25
µm. If the annual amount ofreplenishing water exceeds the capacity of the expan-
sion tank, the following parameters must be compliedwith.
Water capacity Degree of German hardness
Up to 1000 litres Up to 17
Über 1000 – 5000 litres Up to 6
Über 5000 litres Up to 0,5
4 Requirements for an accumulator 7
Installation manual

•If protective agents are used, compliance must be ensured with the permissible
concentration range in heating water.
Type of protective agent Permissible concentration [mg]
Phosphate P2O5 5 - 30
Polysilicates, SiO2 20 - 60
Polysilicates, 10 - 50
Sulphide denoted as SO3 10 - 30
Molybdate denoted as MoO4 150 - 500
Germany – VDI 2035, published 10/2009
Sheet 1 — Scale formation in DHW and hot water heating systems.
Sheet 2 — Water-side corrosion in DHW and hot water heating systems.
4.2 Manufacturer's Guidelines
Compliance with the manufacturer's guidelines ensures that your system is an
example of state-of-the-art technology and also secures your warranty entitle-
ments.
In all work, you must observe the current applicable legal requirements and the rele-
vant safety regulations:
•for Austria: ÖNORM, EN, ÖVGW-TRF and ÖVE
•for Germany: DIN, EN, DVGW, TRGI, TRF and VDE
•for Switzerland: SEV, SUVA, SVGW, SVTI, SWKI and VKF
You must also observe the connection requirements for the domestic hot water sup-
ply equipment and instructions for the heat generator.
8 4 Requirements for an accumulator
Installation manual

The following points must be observed:
1.Installing the heating system:
•The cylinder may only be connected to closed-circuit heating systems.
•The cylinder may only be connected to approved piping systems.
•ÖkoFEN recommends the installation of a DHW mixer as scalding protection.
•The piping must be insulated suciently to reduce cooling losses.
•The building clearance for installing and removing the cylinder must be
ensured.
•The cylinder must be installed in such a way that it can be shut o and emp-
tied.
•ÖkoFEN recommends use of a pressure regulator in the DHW building con-
nection.
•A fine filter (backwash filter) must be installed in the DHW building connec-
tion.
•The pH value must be at least 5.0.
•Materials that emit chlorides (e.g. seals) are prohibited.
•In the case of connection to galvanised pipes, no iron or zinc particles may be
washed into the DHW heat exchanger. It is advisable to install a dirt trap.
•If a corrosion protection additive is employed, it must be compatible with
stainless steel.
2.Loading the accumulator
Optionally, the speed of this pump can be controlled by the boiler controller. Pro-
vision mustbe made for a safety pressure relief valve (3 bar) in the accumulator
loading circuit.
1 heating circuit
Boiler controller terminal àOutput ZW (hot water)
NOTICE
When using 1 heating circuit, at least software version 4.00 is required
2 heating circuits
Boiler controller terminal àOutput UW
Regardless of the software version, a heating circuit controller is required for two
heating circuits.
4 Requirements for an accumulator 9
Installation manual

3.Underfloor and wall heating
NOTICE
Material damage
Use of a flow temperature limiter in low-temperature systems. Electrical connec-
tion of the temperature limiter according to manufacturer's guidelines.
The accumulator is connected to an underfloor heating system via a mixed heat-
ing circuit.
In the case of underfloor heating systems with plastic pipes according to DIN
4727 (PD), DIN 4728 (PP type 2) and DIN 4729 (VPE) (not 100% impermeable to
oxygen diusion), the following is advisable:
•Corrosion-resistant heat exchanger for system separation
•Anti-corrosion agent
Corrosion and sedimentation damage attributable to disregarding these rec-
ommendations will not
be compensated.
In the case of underfloor and wall heating systems with plastic piping imper-
meable to oxygen according to DIN 4726 E or with copper piping, there are
no additional requirements.
4.Radiator heating
As standard, the accumulator is connected to a radiator system with a mixed
heating circuit. As standard, the buer tank achieves a temperature of at least
60°C.
5.Solar thermal system
Both flat-plate and tubular collectors can be connected to the buer tank. In
order to prevent damage to the collectors, pay attention to the correct concen-
tration of antifreeze in the heat transfer medium.
NOTICE
A heat exchanger register for connection to a solar thermal system is not provi-
ded. This can be realised by an external plate heat exchanger.
4.3 Notices for correct operations
•The installer must check that the flange bolts are properly tightened before start-
ing up the system. The maximum tightening torque must not exceed 25 Nm.
•A suitably sized expansion vessel must be installed on the hot water circuit.
•Install a suitable, according label and application, safety valve in the cold water
inlet.
•Operation of safety valves must be checked periodically. Periodic control, mainte-
nance and replacement of magnesium anode are prerequisites for the guarantee.
•In case of water with a hardness > 17 ° dH (= 30 ° TH), it is advisable to use spe-
cific products in order to avoid excess limestone build-ups.
•Grounding connection is mandatory.
10 4 Requirements for an accumulator
Installation manual

4.4 Installation Room
The Accumulator can be installed either in the boiler room or a neighbouring room.
Conditions in the installation room:
•The access opening must be at least as large as the maximum unit dimension of
the Accumulator.
•The ceiling height must at least correspond to the height of the Accumulator with
insulation (without ventilation).
•The installation room must be frost-proof.
•The floor of the installation room must be capable of bearing the whole weight of
the Accumulator after filling.
4 Requirements for an accumulator 11
Installation manual

5 Product Description
FUNCTION DESCRIPTION
The accumulator is installed between power sources and energy consumers.
It absorbs the energy when it is available and holds it in readiness for when it is nee-
ded.
One or more power sources provide the accumulator with energy. One or more con-
sumers draw energy from the accumulator.
The accumulator can be used for energy management and storage for solar systems
and pellet heating systems.
The POWER SOURCES
Solar
The solar system supplies the accumulator with energy by means of solar heat
exchangers.
Pellematic pellet boiler
The pellet boiler supplies the accumulator with energy by means of water exchange.
The pellet boiler needs a storage tank to achieve a minimum burner running time. If
the operating periods are too short, the eciency of the boiler is reduced and the
boiler is soiled unnecessarily.
The ENERGY CONSUMERS
Heating
The heating system draws energy from the accumulator using the temperature dier-
ence between flow and return.
Hot water
The hot water system draws energy from the accumulator either via a DHW flow heat
exchanger or an external fresh water module.
Secondary return line
The secondary return line pre-heats the domestic hot water, while drawing the energy
required from the accumulator.
It is particularly important to minimise the running times of the return pump to the
greatest possible extent to prevent unnecessary energy losses.
Use timer-controlled and temperature-controlled return pumps.
12 5 Product Description
Installation manual

5.1 Model Sizes - Technical Data
Accumulator 600 800 1000 1500 ** 2000 **
Tank volume 571 liter 732 liter 925 liter 1515 liter 2054 liter
Diameter without insulation 700 mm 790 mm 790 mm 1.000 mm 1100 mm
Diameter with insulation 900 mm 990 mm 990 mm 1200 mm 1300 mm
Height without insulation 1644 mm 1686 mm 2041 mm 2152 mm 2377 mm
Height with insulation 1700 mm 1760 mm 2090 mm 2200 mm 2420 mm
Tilted height 1690 mm 1740 mm 2085 mm 2215 mm 2450 mm
Weight (depending on type) 84 – 156 kg 97 – 202 kg 114 – 232 kg 162 kg 225 kg
Materials
Tank ST 235 JR ST 235 JR ST 235 JR ST 235 JR ST 235 JR
Corrugated pipe heat exchanger
for drinking water
1.4404 1.4404 1.4404 - -
Smooth pipe heat exchanger ST 235 JR ST 235 JR ST 235 JR - -
Max. operating pressure
Heating circuit 3 bar 3 bar 3 bar 3 bar 3 bar
Corrugated pipe heat exchanger
for drinking water
10 bar 10 bar 10 bar - -
Solar smooth pipe heat
exchanger
10 bar 10 bar 10 bar - -
Heat exchanger area (depending on type)
Corrugated pipe heat exchanger
for drinking water
5 m² 6 m² 7,5 m² - -
1. Solar smooth pipe heat
exchanger
2,4 m² 2,8 m² 3,0 m² - -
2. Solar smooth pipe heat
exchanger
- 2,0 m² 2,4 m² - -
Heat exchanger capacity
Corrugated pipe heat exchanger
for drinking water
25 l 30 l 38 l - -
1. Solar smooth pipe heat
exchanger
18 l 21 l 23 l - -
2. Solar smooth pipe heat
exchanger
- 15 l 18 l - -
5 Product Description 13
Installation manual

NL rating according to DIN 4708–3 ***
With 12 kW afterheating NL 2 NL 2 NL 4
With 15 kW afterheating NL 2,5 NL 2,5 NL 5
With 20 kW afterheating NL 3 NL 3 NL 6
With 25 kW afterheating NL 4 NL 4 NL 7
With 32 kW afterheating NL 4,5 NL 8
With 36 kW afterheating NL 5 NL 9
Discharge
without afterheating (at 63° C
accumulator temp., through-loa-
ded, 40° C water delivery, 15 l/
min)
480 l 555 l 720 l - -
Max. water delivery* 30 l/min 30 l/min 50 l/min - -
Energy eciency labelling
Insulation fleece 100
mm
fleece 100
mm
fleece 100
mm
fleece 100
mm
fleece 100
mm
Standby losses [kWh/24h] 2,71 2,81 3,46 4,09 4,90
Energy eciency class C C C C D
Standing loss [W] 113 117 144 170 204
* dependent on constructural parameters such as water pipe sizes.
14 5 Product Description
Installation manual

6 Transport and Placement
6.1 Transport
The accumulator is mounted securely on a pallet.
NOTICE
Material damage
The accumulator must be stored under a roof in a dry environment.
The rainproof packaging oers no protection against surface rust.
6.2 Notes on bringing the unit into the building
1.Remove the cylinder from the pallet.
2.Transport the cylinder to its destination.
The cylinder must be freely accessible within a radius of 0.5 m.
The building clearance for installing and removing the cylinder must be ensured.
Provision must be made for a space requirement around the accumulator for connec-
tion and maintenance of the complete hydraulic system.
NOTICE
Installing the accumulator
Use the standing ring for installing the accumulator!
6 Transport and Placement 15
Installation manual

7 Installing the accumulator
7.1 Setting Up the accumulator
After bringing the unit into the installation room, it must be installed and set up.
1.Installing the accumulator.
2.Positioning the accumulator in the installation room.
3.Setting up the accumulator horizontally with the help of a water level.
7.2 Mounting the thermowells
16 7 Installing the accumulator
Installation manual

7.3 Removal of the accumulator tank insulation
First place the floor insulation!
7 Installing the accumulator 17
Installation manual

NOTICE
Damage to hydraulics
Do not forget to provide ventilation.
We recommend a manual or automatic vent that is directed to the outside of the
insulation, rather than mounted directly on the cylinder.
18 7 Installing the accumulator
Installation manual

7.4 Installing the Additional Cylinder
1. The process of bringing the additional cylinder into the building and installing it is
the same as that for all other types of the accumulator.
When installing and setting up the additional cylinder, the same height must be
attained as for the adjacent accumulator.
Distance between accumulator and additional cylinder
Model size of the accumu-
lator and additional cylin-
der
Distance between centre
of accumulator and cen-
tre of additional cylinder
Space between the insula-
ted cylinders.
600 litres 1080 mm approx. 150 mm
800 litres 1120 mm approx. 80 mm
1000 litres 1120 mm approx. 80 mm
2. Installation is reduced to installing the insulation and connection to the accumu-
lator.
3. See Section Installing the Insulation
7 Installing the accumulator 19
Installation manual

8 Connecting up the hydraulics
8.1 Connector Arrangement
The connector arrangement shows where and at what height the connectors are
located for the hydraulic connections. Mind in any case our Hydraulic connecting dia-
grams in the boiler instructions!
1 Boiler flow – with bae plate
2 disposable
3 disposable – with bae plate
4 Solar loading flow – with bae plate
5 Solar sensor or heating circuit sensor
6 disposable
7 disposable
8 disposable *
9 disposable *
10 Sensor pocket
11 DHW connection – mains water
12 Flow upper solar register
13 Return upper solar register
14 Flow lower solar register
15 Return lower solar register
16 Cold water connection mains water
*) is led into the return channel layer.
20 8 Connecting up the hydraulics
Installation manual