Gebwell G-Energy User manual

Installation, operation and maintenance manual
G-Energy

2 Gebwell G-Energy
G-Energy accumulators are designed and manufactured in accordance with sound engineering practices (Article 4.1 and 4.3 of the Pressure
Equipment Directive 2014/68/EU) in order to ensure their safe operation.
KEEP THE OPERATION INSTRUCTIONS IN THE IMMEDIATE VICINITY OF THE DEVICE!
You should familiarise yourself thoroughly with the instructions before the device is installed or serviced. The instructions issued must be
adhered to.

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1 WARRANTY
Gebwell Ltd.
Patruunapolku 5, 79100 LEPPÄVIRTA, tel. [phone], [e-mail]
issues this product,
G-Energy accumulator
with the following warranty regarding manufacturing and material faults.
Warranty period and entry into force
Gebwell Ltd. grants a two-year (2) warranty for the accumulator,
covering any material and manufacturing defects. The warranty will
enter into force from the purchase date. Gebwell Ltd. grants a two-year
manufacturer’s warranty for the accessories of the accumulators that it
sells.
The start date of the warranty must be verified with a purchase receipt.
If no receipt is presented, the delivery date from the factory is considered
the warranty start date.
Warranty content
This warranty includes manufacturing or material defects detected in this
product within the warranty period, as well as direct costs resulting from
repairing the device.
The buyer is liable for all defects caused to accumulators as a result of
storage conditions during the period between the delivery date and the
deployment date (see installation, operation and maintenance manual;
storage).
Warranty limitations
The warranty does not cover costs resulting from a defective device
(travel, energy, etc. costs), damage caused by a defective device, the
buyer’s production losses, profits not realised, or other indirect costs.
This warranty has been provided on the grounds that the product
functions correctly in normal conditions and that the user manual is
carefully followed. The liability of the warrantor is limited in accordance
with these terms and shall not therefore cover any damage caused by the
product to another object or person.
The warranty does not apply to direct personal injuries or damage to
property caused by a defective product delivered.
The warranty is granted on condition that all effective regulations,
generally accepted installing methods and product mounting instructions
provided by the manufacturer have been complied with.
The customer is liable for visually inspecting the product before
installation. A product that is clearly defective must not be installed.
The warranty will become void if any data on the data plate of the
accumulator has been removed or modified.
Gebwell Ltd. is not liable for the breakdown of an incorrectly installed
device.
The device may only be repaired by a professional designated by
Gebwell Ltd.. Faulty repairs and adjustments may pose a hazard to the
user, damage the device and weaken the efficiency of the device. Please
bear in mind that a visit by a retailer or service technician is not free,
even during the warranty period, if the repair is done due to a faulty
installation, repair or adjustment.
The warranty does not include damage that has been caused
 by the transportation or storage or the product
 by negligent or faulty use of the product
 by electrical installations, pipe installations, maintenance, repairs
or modifications carried out by a third party
 by conditions beyond the control of the warrantor
 by installation or placement of the product against the instructions
of the installation, operation and maintenance manual, or otherwise
incorrectly.
Moreover, the warranty does not cover the repair of faults that are
insignificant in terms of the operation of the equipment, such as
superficial scratches. The warranty does not include normal adjustments
described in the operation manual, user guidance visits, service and
cleaning, or tasks due to negligence of the precautions and installation
instruction or investigations of the same.
The warranty terms in accordance with the joint recommendation by the
Association of Finnish Metal and Engineering Industries and
Kuluttajaneuvosto (Consumer Council) are applied to matters not
covered by the above-mentioned sections.
Conditions of the validity of the warranty
 the product is in normal operation for which it is designed
 the installation is carried out by a professional in the field,
following the instructions issued by the manufacturer
If the product changes ownership during the valid warranty period, a
free-form written notification of the change must be submitted to the
manufacturer.
Measures when a fault is detected
If a fault is detected during the warranty period, the customer must
immediately (normally within 14 days) report it to the authorised
Gebwell retailer which sold the product, or to Gebwell. The information
to be provided includes the equipment model and serial number of the
product, as well as a detailed description of how the fault was discovered
and the conditions under which it developed and/or can be detected. The
warranty form properly completed in relation to the purchase must be
presented upon request. Reporting any defects after the warranty period
is invalid unless done in writing during the warranty period.
Reporting must be done immediately after detecting the fault, but within
14 days at the latest. If reporting is not done immediately when the
customer detects the fault, or when the customer should have detected
the fault, the buyer will lose his/her right to claim based on this warranty.

4 Gebwell G-Energy
Repair under warranty will be carried out free of charge.
Servicing in Finland
Servicing for this product during the warranty period and after the
warranty period in Finland will be performed by the servicing
organisation authorised by the manufacturer throughout the economic
service life of the accumulator.
Making a service request
Repairs under warranty, servicing requests and orders for spare parts
must be directed straight to the authorised Gebwell retailer that
sold/delivered the product. Before making a service request, please:
 carefully read the installation, operation and maintenance manual,
and consider whether you have followed the manual when using
the device
 ensure, before making the request, that the warranty period has not
run out, you have carefully read the warranty terms and know the
product’s model and serial numbers
 all parts belonging to the device to be returned must be packed with
the device
 the device to be returned must be closed in such a way that handling
it does not have adverse effects on health or the environment.
The device replaced under warranty is the manufacturer’s property.
Gebwell Ltd. reserves the right to decide how, where and who will
perform the repair or replacement under the responsibility of the
manufacturer.
Gebwell Ltd. is not liable for the breakdown of an incorrectly installed
device.

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Congratulations for making a good choice!
Gebwell Ltd. is a Finnish company, specialised in environmentally friendly heating and cooling solutions. At our plants in Leppävirta, we
manufacture heat pumps, district heating substations and accumulators, as well as Pivaset fire extinguishing products.
Gebwell G-Energy® accumulators
In water-circulating heating systems, the heat generated by the heating device is stored in energy accumulators, to be used to heat the
building and domestic water. The Gebwell G-Energy energy accumulator is a Finnish product, manufactured by experts of the heating
sector at the Leppävirta factory.
Our generous product range offers models to be used with different heating methods. The G-Energy energy accumulator enables the parallel
use of different heating systems. The accumulator can be connected to a floor heating or radiator network Our accumulators can be
connected to underfloor or radiator heating systems. G-Energy accumulators are available for both single-family houses and large
properties. Our range of models includes accumulators with 501L, 1000L, 2000L, 3000L, 4000L and 5000L capacities.
Easy to handle
Thanks to its steel framework mounted on the bottom, the Gebwell accumulator is easy to transport, haul around and install, regardless of
the model or size. The accumulators have detachable insulation, which makes it easy to carry them into confined spaces without removing
doorframes. Depending on the size of the accumulator, the detachable insulation comes in 3- 5 loose segments. For example, the 1000L
accumulator has a diameter of 850mm without insulation. The insulation segments are attached to each other with quick latches, which
makes it easy to remove or install them. The accumulator’s connections do not reside inside the insulation; to facilitate pipe installations,
the connections extend to the insulation surface level. Adjustment legs (adjustment tolerance 0-60 mm) allow the accumulator to be easily
set to stand vertically even on an uneven surface.
High quality and long life-cycle
The Gebwell factory in Leppävirta employs strict quality controls. Robot welding ensures first-grade welding and even quality. The tanks
are made out of steel, primed, and pressure tested using water. The insulation material in the accumulators is pressure cast polyurethane,
which has extremely good thermal insulation capacity and minimal thermal loss. The insulation is made of closed-cell urethane, and the
surface plate of the insulation segments is a painted steel plate covered with a protective membrane. Shape wise, Gebwell’s vertical
cylindrical accumulator provides the best thermal option. Ease of use has also been taken into consideration in the design of connections.
The drain connection located at the front of the accumulator makes it easy to drain the accumulator.
Sufficient fresh water
Using an energy accumulator, i.e. a hot water accumulator, is an ecological and economic way to produce a comfortable, even room
temperature and sufficient hot water. The hot water accumulator stores and distributes the heat produced by heating systems, which is then
used to heat the property and domestic hot water. In Gebwell accumulators, domestic water is heated in a copper coil, which offers a quick
turnover of water. The coil distributes water energy-efficiently, ensuring its freshness. Coils for accumulators must be ordered separately,
with the exception of the G Energy Coil domestic hot water heater, which comes with ready-installed coils.

2 Handling the accumulator
2.1 Content of the delivery
 Accumulator
 Installation, operation and maintenance manual 1 pc
 Accessory bag containing a hoist ring for lifting the
accumulator and a handle for detaching insulation
segments.
2.2 Optional accessories
 Coil
 Electric heater
2.3 Transportation
It is recommended that you transport the accumulator in a
vertical position and well supported. However, if the
accumulator is transported in a horizontal position, care must be
taken to ensure that the outer covering is not damaged.
Any notes regarding visible damage caused by transportation
must be entered in the waybill and communicated to the
manufacturer without delay.
Carefully remove the plastics packaging.
2.4 Hauling the accumulator
It is recommended that the accumulator be hauled on a pallet
jack or forklift. The steel framework mounted on the base of the
accumulator facilitates hauling. The forks of a pallet jack or
forklift must be inserted into the holes present in the steel
framework, after which the device can be lifted.
The 1,000-litre accumulator is also available in a model with a
two-part steel framework. At the installation site, the lower steel
framework can be removed, thereby lowering the accumulator
by 150mm. By doing so, the accumulator can be fitted into a
space that is lower than the space required by the standard 1,000-
litre accumulator.
The accumulator can also be lifted from a hoist ring attached to
the top of the accumulator. In order to attach the hoist ring, the
insulation plate located on top of the accumulator must be
removed.
Ensure that the hoist ring is properly screwed in place! When
lifting the accumulator extreme caution must be exercised, and
lifting the device in an oblique direction is prohibited!
If the accumulator is transported to its site of installation lying
on its side, the length of the accumulator in this position must be
taken into account. The tables at the end of the manual give the
lengths in question.
2.5 Detachable insulation segments
As a standard, accumulators are fitted with detachable insulation
segments. Insulation segments are easy to detach and reinstall.
Insulation segments can be detached by unlocking the quick
latches using the handle included in the delivery.
The number of segments is three to five, depending on the
volume of the accumulator. The diameter of the accumulator is
reduced by 180mm when the insulation segments are detached.
For example, with all the insulation segments detached, the
diameter of a 1,000-litre accumulator is as little as 850mm.
In order to detach a detachable insulation segment, remove the
plastic plug in the hole of the quick latch, push the latch into the
hole and turn it anticlockwise. There are two quick latches, one
located at the upper edge of the insulation segment, the other at
the lower edge. When installing insulation segments, turn the
handle anticlockwise to cause the quick latch to lock.
2.6 Placing the accumulator
When placing an accumulator, account must be taken to ensure
that the floor supports the weight of the accumulator when it is
filled with water, and that there is sufficient room for the
technician to install connectors and perform maintenance tasks.
The steel framework located at the
bottom of the accumulator has levelling
feet with an adjustment range of 0 –
60mm. By adjusting the feet, the
accumulator can be installed in an
upright position, even on an uneven
surface.
On the low-height model, the levelling feet are mounted on the
lower, detachable part of the steel framework. Move the
levelling feet to the upper part after removing them.

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2.7 Detaching the hauling frame – the
height-adjustable accumulator models
With regard to 1,000-litre accumulators, our product range
includes models whose height can be reduced. In such models,
the steel framework beneath the accumulator has two parts. The
lower part of the framework, the one facilitating hauling, can be
detached at the installation site, thereby reducing the height of
the accumulator by 150mm.
Lift the accumulator up from the hoist ring, or, alternatively,
remove the insulation (see the previous page for instructions)
and carefully turn the accumulator onto its side.
1. Detach the lower framework by loosening the bolts.
2. Detach the lower framework.
3. Detach the levelling feet from the lower framework.
4. Screw the legs into place on the framework that was left on
the bottom of the accumulator.
NOTE: The connection on the bottom of the model with a
reduced height is no longer available. The connection is ready-
plugged on delivery.

8 Gebwell G-Energy
3 Information about the tank
Every accumulator that we deliver comes with a data plate which
indicates the serial number of the accumulator, and other
important information about it which is needed when ordering
accessories or possible maintenance for the accumulator. The
data plate also includes information on the accumulator that must
be entered in the installation log.
4 Installation
Only an HVAC professional may install and commission an
accumulator.
G-Energy accumulators can only be installed in a vertical
position.
All connections must be insulated during installation work in
order to minimise thermal loss. While installing, it must be
ensured that the number of thermometers is sufficient and that
there is sufficient space for insulation when performing tube
fittings.
4.1 Tube fittings
Tube fittings must be performed in accordance with the valid
regulations and instructions. The accumulator must be fitted with
the necessary valves, such as a safety valve, a shut-off valve, a
non-return valve and a vacuum breaker/vacuum valve. The
accumulator must be fitted with at least one pressure safety
valve, the operation of which has been tested in accordance with
the manufacturer’s instructions.
The accumulator must be fitted with a mixing valve, which limits
the temperature of the supply water to 60 degrees. If plastic or
heat-treated copper tube is used, internal support bushing must
be used during installation. The safety valve overflow pipe must
be led to the nearest drain. The safety valve overflow pipe must
be the same size as the safety valve. The safety valve overflow
pipe must be installed so that it slants all the way to the drain and
is protected against freezing. The tip of the overflow pipe must
be visible, and not located near electrical components.
The discharge valve can be installed either on a discharge
connection located beneath the accumulator, or on a
measurement connection located at the bottom part of the
accumulator, with the size of the connection being 1”.
4.2 Filling
The accumulator should be filled with water that is as warm as
possible in order to facilitate bleeding and to diminish heat
expansion caused by heating. The overflow piping of the
accumulator must be built in such a manner that the water
coming from the piping causes no water damage. Also ensure
the water’s suitability as domestic water.
The pressure in the system must remain below the planned
structural pressure indicated on the data plate. The piping must
be insulated only after the leak tightness of the joints has been
checked. When insulating the piping, due attention must be paid
to the maintainability of the devices.
The company performing the installation must provide the
owner with training on the use of the accumulator. The
installation log on page 11 must be filled in to complete the
installation and orientation training. A completed installation
log is a precondition for the validity of the warranty. It is
recommended that all components be marked with clear stickers
in order to enable the user to identify them.
A sufficient number of bleeding valves must be installed in the
system in order to ensure the functionality of the accumulator
and the system. Air may bleed from the system and the
accumulator for several days after they have been
commissioned.
The expansion tank to be installed must be correctly
dimensioned and the initial pressure must be set in accordance
with the manufacturer’s instructions in order to prevent the
breakdown of the accumulator.
4.3 Installing the heater
Some G-Energy accumulators can be fitted with electrical
heaters. The connection size of heaters is 2”. Electrical heaters
enable, for instance, a wood-heated house to be electrically
heated during a holiday trip. When installing heaters, you should
use the flat gaskets delivered with the product or, alternatively,
hemp and putty. When installing the accumulator, due attention
must be paid to ensuring that
there is sufficient space in front of the accumulator to enable the
removal of the heaters (consult the table in question: length).

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Installing the heater’s thermostat box
Thermostat box 571398530
Thermostat Rathgeber RAC 4090 dual thermostat
Adjustment range 30–75°C, safety thermostat 98°C
Approvals in accordance with EN60730-1/-2-9, VDE, CE, RoHS
400V AC, 2083.3) A, 50/60 Hz
INSTALLATION MAY BE PERFORMED ONLY BY A
PERSON TRAINED FOR THE INSTALLATIONS IN
QUESTION!
1. Place a cardboard thermal insulation ring on top of the
heater flange, so that it will be positioned between the
thermostat box and the flange.
2. Place the bottom part of the thermostat box on top of the
heater flange.
3. Connect the free earth connector of the box to the fastening
screw.
4. Thread the metal installation ring of the box over the
heaters’ connectors. Fasten the bottom of the box using
hexagon socket head screws, ensuring that the installation
ring presses the box bottom tightly against the heater
flange.
5. Thread the power cable though the pipe sleeve of the box
and connect the phase conductors to the terminals of the
thermostat. Connect the zero conductor directly to the
heater.
6. Connect the earth cable leading from the switchboard (see
the previous figure).
Captions:
Circuit diagram
Attach the power cables to the connectors of the thermostat.
Connect the thermal heater to the thermostat using connector
cables
ATTACH THE POWER
CABLES TO THE
CONNECTORS OF THE
THERMOSTAT.
KOPPLA ELPATRONEN TILL
TERMOSTATEN MED
KOPPLINGSLEDNINGAR
CIRCUIT DIAGRAM

10 Gebwell G-Energy
7. Push the capillary sensors of the thermostat to the middle,
into the thermostat pocket.
8. Connect the phases of the power cables to the screw
terminals of the thermostat.
9. Connect the wires of the thermostat to the electrical
connectors L1, L2 and L3 on the heater. Check the tightness
of the nut fastening of the spade terminals. NOTE: If the
terminal (or the nut) has loosened, tighten the nut only
slightly. If force is used when tightening, the electrical
connector may break.
10. Close the lid of the junction box. Ensure that no cables or
the tube of the capillary sensor are trapped between the
box and its lid when closing the lid.
5 Installing coils
A gasket available from the manufacturer can be considered
adequate. Secure the flange by tightening each bolt a little at a
time. The gasket must not protrude more than 5mm beyond the
flange and the hatch.
6 Maintaining the accumulator
Annual checks for leak tightness count as sufficient maintenance
procedures of the accumulator. All connections and coil hatches
must be visually checked for leaks.
7 Precautions
The following must be taken into account during installation and
use:
The load exerted by a filled accumulator on the floor, including
any need to reinforce the floor.
Any risks posed by the fluid in the system in connection with
installation, use and maintenance.
The heating up of the components of the system and the hot fluid
within it, in order to avoid burns.
An accumulator air extraction system for preventing air pockets
from forming inside the accumulator.
If not used properly, the accumulator may pose a considerable
risk. It must be ensured that the system is fitted with sufficient
safety devices to prevent an excessive rise in temperature.
Electrical equipment may be installed and maintained only by an
authorised professional with regard to electrical products.
Making a fire and using tools that generate sparks next to the
accumulator is prohibited.
8 Recycling
We recommend that the connections of the system be detached
by a professional technician. The system must be pressure-free
and the fluid in it must be cooled before dismantling work can
begin. If the system contains any chemicals, they must be
disposed of as stipulated by legislation.
The metal parts of the accumulator (tank, connections and
possible coils), as well as all plastic components can be recycled.
Plastic components, such as the insulation of the accumulator,
can also be thrown into an energy waste dumpster.

11
10 Installation log
An installation log must be filled in during installation, as a completed log is a precondition for the validity of the warranty.
Information about the accumulator can be found on the data plate mounted on the side of the accumulator.
GTIN number of the accumulator: Serial number of the accumulator:
Address of the installation site: System’s heating methods:
System pressure: Heater power:
The following inspections have been carried out:
V
Hot water Notes
-
shut
-
off valves
-
mixing valve
Cold water
-
shut
-
off valves
-
mixing valve
-
safety valve
Electricity
-
connected power supply
-
sensors
-
temperature limiter
Other
-
leak tightness of pipe joints has been checked
- the owner of the accumulator has been provided with
orientation training in the use of the accumulator
HVAC installation
Company:
Technician (name)
Telephone:
Email:
Date of the HVAC installation: / 20
Signature of the technician:
Electrical installation
Company:
Technician (name)
Telephone:
Email:
Date of the electrical installation: / 20
Signature of the technician:

12 Gebwell G-Energy
11 Accumulator technical specifications
G-Energy Custom Accumulator – fully customized accumulator
Volume – 501, 1000, 2000, 3000, 4000 or 5000 litres
Pressure class – 1,5-10 bar
Connections – number, size and disposition as required
Tank material – FE, HST or RST
Insulation material – urethane, cell rubber or without insulation
Bulkhead – equipped with or without bulkhead
Model Custom 501 Custom 1000 Custom 2000 Custom 3000 Custom 4000 Custom 5000
Tank volume L 501 1000 2000 3000 4000 5000
Height mm* ** 2010 / 2030 2130 / 2150 2200 / 2250 2350 / 2400 2400 / 2450 2500 / 2550
Height low-height mm* ** 1980 / 2000
Diameter mm** 600 / 780 850 / 1030 1200 / 1380 1400 / 1580 1600 / 1780 1800 / 1980
Tilt measurement mm*** 2100 2200 2300 2450 2600 2700
Weight kg depending on the
model
depending on the
model
depending on the
model
depending on the
model
depending on the
model
depending on the
model
Connection sizes as desired as desired as desired as desired as desired as desired
Max coil size LK45 LK55 LK110 LK110 LK110 LK110
Number of heater
connections pc as desired
as desired as desired as desired as desired as desired
Max size electric heater kW 12 12 12 12 12 12
Max temperature °C 110 110 110 110 110 110
Max operating pressure bar 1,5-10 1,5-10 1,5-10 1,5-10 1,5-10 1,5-10
Domestic hot water coil
Model GTIN Max flow
l/s
Copper pipe
length
m
Heat transfer
area
m
2
Connection
DN/UK
Flange
diameter
mm
Feasibility
tank capacity
L
LK35 coil 5362300 0,5 9 2,1 20 200 501–5000
LK45 coil 5361955 0,5 12 2,8 20 200 1000–5000*
LK55 coil 5361956 1,0 2 x 6 2,8 32 200 1000–5000
LK65 coil 5362603 1,0 2 x 9 4,2 32 200 2000–5000
LK90 coil 5361957 1,0 2 x 12 5,7 32 200 2000–5000
LK110 coil 5361958 1,5 3 x 9 6,4 40 300 2000–5000