Wilo Atmos GIGA-B User manual

Pioneering for You
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Wilo-Atmos GIGA-B
2215196 • Ed.01/2021-08
en Installation and operating instructions

Fig. I: Atmos GIGA-D (Design A)
Fig. II: Atmos GIGA-I (Design B)
5
1.14 1.31 1.32 1.11 1.12 1.151.333.23.1 1.14
1
1.3
1.1
3
2
1.5
1.11 1.15 1.12 1.13 1.16 1.14
1.4
1.11
1.12
1.14
1.15 1.43 1.41
1.2
1.11 1.15 1.12 1.21 1.14
46

Fig. III: Atmos GIGA-I (Design C)
1.4
1
1.3
3.23.1 1.14
31.1
1.11 1.151.121.131.161.14
2
5
4
1.2
1.11 1.151.121.211.14
1.431.41 1.44
1.14 1.311.32 1.33
Fig. IV: Atmos GIGA-B (Design B)
1
5
1.14 1.311.32 1.11 1.121.151.333.53.23.1 1.14
1.3
1.1
3
2
1.5
1.11 1.151.121.131.161.14
1.4
1.11
1.12
1.14
1.151.431.41
1.2
1.11 1.151.121.21 1.14
46

Fig. V: Atmos GIGA-B (Design C)
1.14 1.311.32 1.11 1.121.151.43
1.4
1.41 1.44
1.33
1
3.23.13.5
1.3
1.14
31.1
1.11 1.151.121.131.16
1.2
1.11 1.151.121.21 1.14
1.14
2
5
4

en
Installation and operating instructions Wilo-Atmos GIGA-B 7
Table of contents
1 General information ................................................................................................................................................................. 8
1.1 About these instructions ..................................................................................................................................................................................8
1.2 Copyright ............................................................................................................................................................................................................8
1.3 Subject to change..............................................................................................................................................................................................8
2 Safety......................................................................................................................................................................................... 8
2.1 Identification of safety instructions................................................................................................................................................................8
2.2 Personnel qualifications....................................................................................................................................................................................9
2.3 Electrical work ....................................................................................................................................................................................................9
2.4 Transport.............................................................................................................................................................................................................9
2.5 Installing/dismantling........................................................................................................................................................................................9
2.6 During operation ............................................................................................................................................................................................. 10
2.7 Maintenance tasks.......................................................................................................................................................................................... 10
2.8 Operator responsibilities................................................................................................................................................................................ 10
3 Transportation and storage................................................................................................................................................... 11
3.1 Shipping............................................................................................................................................................................................................ 11
3.2 Transport inspection ......................................................................................................................................................................................11
3.3 Storage ............................................................................................................................................................................................................. 11
3.4 Transport for installation/dismantling purposes........................................................................................................................................ 12
4 Intended use and misuse........................................................................................................................................................ 13
4.1 Intended use.................................................................................................................................................................................................... 13
4.2 Misuse............................................................................................................................................................................................................... 13
5 Product information ............................................................................................................................................................... 14
5.1 Type key........................................................................................................................................................................................................... 14
5.2 Technical data .................................................................................................................................................................................................14
5.3 Scope of delivery............................................................................................................................................................................................. 16
5.4 Accessories ...................................................................................................................................................................................................... 16
6 Description of the pump ........................................................................................................................................................ 16
6.1 Anticipated noise levels................................................................................................................................................................................. 17
7 Installation............................................................................................................................................................................... 18
7.1 Personnel qualifications................................................................................................................................................................................. 18
7.2 Operator responsibilities................................................................................................................................................................................ 18
7.3 Safety................................................................................................................................................................................................................ 18
7.4 Preparing the installation............................................................................................................................................................................... 19
8 Electrical connection.............................................................................................................................................................. 22
8.1 Anti-condensation heater.............................................................................................................................................................................25
9 Commissioning........................................................................................................................................................................ 25
9.1 Initial commissioning...................................................................................................................................................................................... 26
9.2 Filling and venting........................................................................................................................................................................................... 26
9.3 Activation......................................................................................................................................................................................................... 27
9.4 Switching off ...................................................................................................................................................................................................27
9.5 Operation ......................................................................................................................................................................................................... 27
10 Maintenance............................................................................................................................................................................ 28
10.1 Air supply.......................................................................................................................................................................................................... 30
10.2 Maintenance tasks.......................................................................................................................................................................................... 30
11 Faults, causes and remedies .................................................................................................................................................. 34
12 Spare parts............................................................................................................................................................................... 35
13 Disposal.................................................................................................................................................................................... 37
13.1 Oils and lubricants........................................................................................................................................................................................... 37
13.2 Information on the collection of used electrical and electronic products.............................................................................................. 37

en General information
8 WILO SE 2021-08
1 General information
1.1 About these instructions These installation and operating instructions are an integral part of the device. Read
these instructions before commencing any work and keep them in an accessible place
at all times. Strict adherence to these instructions is a requirement for the intended use
and correct operation of the product.
All specifications and markings on the device must be observed. These installation and
operating instructions correspond to the relevant version of the device and the under-
lying safety standards valid at the time of going to print.
The language of the original operating instructions is German. All other languages of
these instructions are translations of the original operating instructions.
1.2 Copyright These installation and operating instructions have been copyrighted by the manufac-
turer. Contents, of any kind, must not be reproduced, distributed, or used for purposes
of competition and shared with others.
1.3 Subject to change Wilo shall reserve the right to change the listed data without notice and shall not be li-
able for technical inaccuracies and/or omissions. The illustrations used may differ from
the original and are intended as an example representation of the device.
2 Safety This chapter contains basic instructions for the individual life cycles of the product.
Failure to observe this information carries the following risks:
ƒDanger to persons from electrical, mechanical and bacteriological effects as well as
electromagnetic fields
ƒEnvironmental damage from discharge of hazardous substances
ƒDamage to property
ƒFailure of important product functions
ƒFailure of required maintenance and repair procedures
Failure to observe the instructions will result in the loss of any claims for damages.
The directions and safety instructions in the other sections must also be observed!
2.1 Identification of safety instruc-
tions These installation and operating instructions set out safety instructions for preventing
personal injury and damage to property, which are displayed in different ways:
ƒSafety instructions relating to personal injury start with a signal word and are pre-
ceded by a corresponding symbol.
ƒSafety instructions relating to property damage start with a signal word and are dis-
played without a symbol.
Signal words
ƒDANGER!
Failure to follow the instructions will result in serious injury or death!
ƒWARNING!
Failure to follow instructions can lead to (serious) injury!
ƒCAUTION!
Failure to follow instructions can lead to property damage and possible total loss.
ƒNOTICE!
Useful information on handling the product
Symbols
These instructions use the following symbols:
General danger symbol
Danger of electric voltage
Warning of hot surfaces
Warning of high pressure
Notices

Safety en
Installation and operating instructions Wilo-Atmos GIGA-B 9
2.2 Personnel qualifications Personnel must:
ƒBe instructed about locally applicable regulations governing accident prevention.
ƒHave read and understood the installation and operating instructions.
Personnel must have the following qualifications:
ƒElectrical work: Electrical work must be performed by a qualified electrician.
ƒInstallation/dismantling work: The installation/dismantling must be carried out by a
qualified technician who is trained in the use of the necessary tools and fixation ma-
terials.
ƒThe product must be operated by persons who are instructed on how the complete
system functions.
ƒMaintenance tasks: The technician must be familiar with the use of operating fluids
and their disposal.
Definition of “qualified electrician”
A qualified electrician is a person with appropriate technical education, knowledge and
experience who can identify and prevent electrical hazards.
The operator must confirm and ensure the field of authority, the competence and the
monitoring of the personnel. If the personnel do not possess the necessary knowledge,
they must be trained and instructed. If required, this can be carried out by the product
manufacturer at the operator’s request.
2.3 Electrical work ƒHave electrical work carried out by a qualified electrician.
ƒWhen connecting to the local power supply system, comply with the nationally ap-
plicable guidelines, standards and regulations as well as specifications issued by the
local energy supply companies.
ƒBefore commencing work, disconnect the product from the mains and secure it
against being switched on again.
ƒGive personnel training on how to establish the electrical connection and the meth-
ods for switching off the product.
ƒProtect the electrical connection with a residual-current device (RCD).
ƒObserve the technical information in these installation and operating instructions as
well as on the rating plate.
ƒEarth the product.
ƒComply with the manufacturer’s specifications when connecting the product to
electrical switching systems.
ƒHave a defective connection cable replaced immediately by a qualified electrician.
ƒNever remove operating elements.
ƒComply with the specifications on electro-magnetic compatibility when using elec-
tronic start-up controllers (e.g. soft starter or frequency converter). If required, take
into account special measures (shielded cables, filters, etc.).
2.4 Transport ƒWear protective equipment:
–Safety gloves for protection against cuts
–Safety shoes
–Sealed safety goggles
–Safety helmet (when using lifting equipment)
ƒOnly use legally specified and approved lifting gear.
ƒSelect the lifting gear based on the prevailing conditions (weather, attachment
point, load etc.).
ƒAlways attach the lifting gear to the designated attachment points (lifting eyes).
ƒPosition the lifting equipment in a way that ensures stability during use.
ƒWhen using lifting equipment, a second person must be present to coordinate the
procedure if required (e.g. if the operator’s field of vision is blocked).
ƒPersons must not stand underneath suspended loads. Do not move loads over work-
places where people are present.
2.5 Installing/dismantling ƒWear protective equipment:
–Safety shoes
–Safety gloves for protection against cuts
–Safety helmet (when using lifting equipment)
ƒLocally applicable laws and regulations on work safety and accident prevention must
be complied with.
ƒThe procedure described in the installation and operating instructions for shutting
down the product/unit must be strictly observed.

en Safety
10 WILO SE 2021-08
ƒDisconnect the device from the mains and secure it against being switched on again
without authorisation.
ƒAll rotating parts must be at a standstill.
ƒClose the gate valve in the inlet and in the pressure pipe.
ƒProvide adequate aeration in enclosed spaces.
ƒMake sure that there is no risk of explosion when carrying out any type of welding
work or work with electrical devices.
2.6 During operation ƒThe operator must immediately notify the person in charge of every fault or irregu-
larity.
ƒIf hazardous defects occur, the operator must immediately deactivate the device.
Hazardous defects include:
–Malfunction of safety and monitoring devices
–Damage to housing parts
–Damage to electrical equipment
ƒCollect any leakage of fluids and operating fluids immediately and dispose of it ac-
cording to the locally applicable guidelines.
ƒTools and other objects should only be kept in their designated places.
2.7 Maintenance tasks ƒWear protective equipment:
–Sealed safety goggles
–Safety shoes
–Safety gloves for protection against cuts
ƒLocally applicable laws and regulations on work safety and accident prevention must
be complied with.
ƒThe procedure described in the installation and operating instructions for shutting
down the product/unit must be strictly observed.
ƒOnly perform the maintenance work described in these installation and operating in-
structions.
ƒOnly original parts from the manufacturer may be used for maintenance and repairs.
The use of any non-original parts releases the manufacturer from any liability.
ƒDisconnect the device from the mains and secure it against being switched on again
without authorisation.
ƒAll rotating parts must be at a standstill.
ƒClose the gate valve in the inlet and in the pressure pipe.
ƒCollect any leakage of fluid and operating fluid immediately and dispose of it ac-
cording to the locally applicable guidelines.
ƒStore tools at the designated locations.
ƒAfter completing work, reattach all safety and monitoring devices and check that
they function properly.
2.8 Operator responsibilities ƒProvide installation and operating instructions in a language which the personnel can
understand.
ƒMake sure that personnel are suitably trained for the specified work.
ƒVerify the area of responsibility and individual responsibilities of personnel.
ƒProvide the necessary protective equipment and make sure that personnel wear it.
ƒEnsure that safety and information signs mounted on the device are always legible.
ƒTrain personnel with regard to the operating principles of the system.
ƒEliminate risks from electrical current.
ƒEquip hazardous components (extremely cold, extremely hot, rotating, etc.) with a
guard to be provided by the customer.
ƒRemove leakages of hazardous fluids (e.g. explosive, toxic or hot) in such a way that
no danger is posed to persons or the environment. Comply with national statutory
provisions.
ƒKeep highly flammable materials at a safe distance from the product.
ƒEnsure compliance with the regulations for accident prevention.
ƒEnsure compliance with local directives or general directives [e.g. IEC, VDE, etc.] and
instructions from local energy supply companies.
Follow all information that appears on the product and ensure that it remains perman-
ently legible:
ƒWarnings
ƒRating plate
ƒDirection of rotation arrow/symbol for direction of flow
ƒIdentification of connections

Transportation and storage en
Installation and operating instructions Wilo-Atmos GIGA-B 11
This device can be used by children from 8years of age as well as people with reduced
physical, sensory or mental capacities or lack of experience and knowledge if they are
supervised or instructed on the safe use of the device and they understand the dangers
that can occur. Children are not allowed to play with the device. Cleaning and user
maintenance must not be carried out by children without supervision.
3 Transportation and storage
3.1 Shipping The pump is secured to a pallet ex works, packaged in a box and protected against dirt
and moisture.
3.2 Transport inspection Check delivery immediately for damage and completeness. Defects must be noted on
the freight documentation! Defects must be notified to the transport company or the
manufacturer immediately on the day of receipt of shipment. Subsequently notified de-
fects can no longer be asserted.
Only remove the outer packaging at the place of utilisation to ensure that the pump is
not damaged during transport.
3.3 Storage
CAUTION
Damage due to incorrect handling during transport and storage!
Protect the product from moisture, frost and mechanical damage during transport
and temporary storage.
If available, leave the covers on the pipe connections so that no dirt and other foreign
matter can get into the pump housing.
To avoid scoring at the bearings and sticking, turn the pump shaft once a week using a
socket wrench.
If a longer storage time is required, contact Wilo for preservation measures.
WARNING
Risk of injury due to incorrect transport!
If the pump is transported again at a later date, it must be packaged so that it cannot
be damaged during transport. Use the original packaging for this, or choose equival-
ent packaging.

en Transportation and storage
12 WILO SE 2021-08
3.4 Transport for installation/dis-
mantling purposes
WARNING
Risk of personal injury!
Incorrect transport can lead to personal injury!
• Unload boxes, lathed spaces, pallets or cartons, depending on the size and con-
struction, with forklift trucks or with slings.
• Always lift heavy parts of more than 30kg with hoisting gear that is in accord-
ance with local regulations.
⇒ The bearing capacity has to be adapted to the weight!
• Transport the pump using approved lifting gear (block and tackle, crane etc.).
Lifting gear must be attached to the pump flanges and, if necessary, to the
outer motor diameter.
⇒ Securing against slipping is required for this!
• When lifting machines or parts with eyes, only use load hooks or shackles that
are in accordance with local safety regulations.
• The transport eyes on the motor are only for transporting the motor, but are not
approved for transporting the complete pump.
• If load chains or ropes are put over sharp edges, a guard has to be used or they
have to be put through eyes.
• When using a block and tackle or similar hoisting gear, make sure that the load
is lifted vertically.
• Prevent the suspended load from swinging.
⇒ Swinging can be avoided by using a second block and tackle. The direction
of pull of both block and tackles must be less than 30° to the vertical.
• Never subject load hooks, eyes or shackles to bending forces-their load axes
have to be in the direction of the tractive forces!
• When lifting, make sure that the load limit of a load rope is reduced for diagonal
pulling.
⇒ The safety and effectiveness of a stranding is best ensured when all load-
bearing elements are loaded in the vertical direction to the greatest extent
possible. If need be, use a lifting arm which can be attached vertically to the
load rope.
• Set up a safety zone in such a way that there is no danger in the event that the
load or a part of the load slips or the hoisting gear breaks or tears.
• Never leave a load longer than necessary in a suspended position! Make sure
there is no danger to the personnel when accelerating and slowing down during
the lifting procedure.
Fig.1: Transporting the pump
For lifting with a crane, the pump must be supported by suitable belts or load ropes, as
shown. Place belts or load ropes in loops around the pump, which tighten from the
pump’s own net weight.
The transport eyes on the motor are only for guiding when the load is being carried!
WARNING
Damaged transport lugs can break off and cause considerable personal
injury.
• Check the transport lugs before use for damage and secure fixation.

Intended use and misuse en
Installation and operating instructions Wilo-Atmos GIGA-B 13
Fig.2: Transporting the motor
The transport eyes on the motor are only for transporting the motor, but are not ap-
proved for transporting the complete pump!
DANGER
Risk of fatal injury from falling parts!
The pump itself and pump parts can be extremely heavy. Falling parts pose a risk of
cuts, crush injuries, bruises or impacts, which can be fatal.
• Always use suitable lifting equipment and secure parts against falling.
• Never stand underneath a suspended load.
• During storage and transport, as well as before all installation and assembly
work, ensure that the pump is in a safe position and standing securely.
WARNING
Personal injury due to unsecured installation of the pump!
The base with the threaded holes is used for fixation only. When standing freely, the
pump might not be sufficiently stable.
• Never place the pump unsecured on the pump support feet.
4 Intended use and misuse
4.1 Intended use The glanded pumps of the Atmos GIGA-I (in-line single pump), Atmos GIGA-D (in-line
twin-head pump) and Atmos GIGA-B (monobloc pump) series are intended for use as
circulators in building services.
They may be used for:
ƒHot-water heating systems
ƒCooling and cold water circulation systems
ƒProcess water systems
ƒIndustrial circulation systems
ƒHeat carrier circuits
Intended use includes compliance with these instructions as well as the information and
markings on the pump.
Any use beyond the intended use is considered misuse and will result in the loss of all li-
ability claims.
4.2 Misuse The operational reliability of the supplied product is only guaranteed for intended use in
accordance with chapter "Intended use" of the installation and operating instructions.
The limit values must not fall below or exceed those values specified in the catalogue/
data sheet.
WARNING!Misuse of the pump can lead to dangerous situations and damage.
ƒNever use fluids other than those approved by the manufacturer.
ƒNon-permitted substances in the fluid can destroy the pump. Abrasive solids (e.g.
sand) increase pump wear.
ƒPumps without an Ex rating are not suitable for use in potentially explosive atmo-
spheres.
ƒHighly flammable materials/fluids should always be kept at a safe distance from the
device.

en Product information
14 WILO SE 2021-08
ƒNever allow unauthorised persons to carry out work.
ƒNever operate the pump beyond the specified limits of use.
ƒNever carry out unauthorised conversions.
ƒUse authorised accessories and genuine spare parts only.
Typical installation locations are technical rooms within the building with other do-
mestic installations. No provision has been made for direct installation of the pump in
rooms used for other purposes (residential and work rooms).
Outdoor installation requires a corresponding, special version (motor with anti-con-
densation heater). See chapter “Anti-condensation heater connection”.
5 Product information
5.1 Type key Example:
Atmos GIGA-I 80/130-5.5/2/6
Atmos GIGA-D 80/130-5.5/2/6
Atmos GIGA-B 65/130-5.5/2/6
Atmos GIGA-I
Atmos GIGA-D
Atmos GIGA-B
Flange-end pump as in-line single pump
Flange-end pump as in-line twin-head pump
Flange-end pump as monobloc pump
80 Nominal diameter DN of the flange connection in mm
(with Atmos GIGA-B: discharge side)
130 Impeller nominal diameter in mm
5.5 Rated power P2 in kW
2 Number of poles, motor
6 60Hz version
Table1: Type key
5.2 Technical data Property Value Note
Rated speed Version 50Hz:
ƒAtmos GIGA-I/-D/-B
(2-/4-pole): 2900rpmor
1450rpm
ƒAtmos GIGA-I (6-pole):
950rpm
Depending on pump type
Rated speed Version 60Hz:
ƒAtmos GIGA-I/-D/-B
(2-/4-pole): 3500rpmor
1750rpm
Depending on pump type
Nominal diameters DN Atmos GIGA-I: 32...200mm
Atmos GIGA-D:
32...200mm
Atmos GIGA-B:
32...150mm (discharge
side)
Pipe and pressure meas-
urement connections
Flanges PN16 in accordance
with DINEN1092-2 with
pressure measurement con-
nections Rp⅛ in accordance
with DIN3858.
Permissible min./max. fluid
temperature
-20°C...+140°C Depending on fluid and
operating pressure
Ambient temperature dur-
ing operation min./max.
0°C...+40°C Lower or higher ambient
temperatures on request
Temperature during stor-
age min./max.
-30°C...+60°C

Product information en
Installation and operating instructions Wilo-Atmos GIGA-B 15
Property Value Note
Max. permissible operating
pressure
16bar (up to + 120°C)
13bar (up to +140°C)
(Version...-P4: 25bar)
Version...-P4 (25bar) as
special version at addi-
tional charge (availability
depends on the pump
type)
Insulation class F
Protection class IP55
Permissible fluids Heating water in accordance
with VDI 2035 part 1 and
part 2
process water
cooling/cold water
water-glycol mixture up to
40% vol.
standard version
standard version
standard version
standard version
Permissible fluids Heat carrier oil Special version or auxiliary
equipment (at additional
charge)
Permissible fluids Other fluids (on request) Special version or auxiliary
equipment (at additional
charge)
Electrical connection 3~400V, 50Hz Standard version
Electrical connection 3~230V, 50Hz to 3kW in-
cluding
Alternative application for
the standard version (no
additional charge)
Electrical connection 3~230V, 50Hz from 4kW Special version or auxiliary
equipment (at additional
charge)
Electrical connection 3~380V, 60Hz Partially standard version
Special voltage/frequency Pumps with motors with dif-
ferent voltages or other fre-
quencies are available on re-
quest.
Special version or auxiliary
equipment (at additional
charge)
PTC thermistor sensor Standard version from
5.5kW
Other motor power at ad-
ditional charge
Speed control, pole
switchover
Wilo control devices (e.g.
Wilo-CC-HVAC system)
Standard version
Speed control, pole
switchover
Pole switchover Special version or auxiliary
equipment (at additional
charge)
Explosion protection
(EExe, EExde)
Up to 37kW Special version or auxiliary
equipment (at additional
charge)
Table2: Technical data
Additional information
CH
Permissible fluids
Heating pumps Heating water
(in accordance with VDI 2035/VdTÜVTch1466/CH: in ac-
cordance with SWKIBT102-01)
...
No oxygen binding agents, no chemical sealants (ensure
closed system from corrosion perspective according to VDI
2035 (CH: SWKI BT 102-01); rework leaky points).
Fluids
Water-glycol mixtures or fluids with a different viscosity than pure water increase the
power consumption of the pump. Only use mixtures with corrosion protection. Observe
the relevant manufacturer’s specifications!
ƒAdjust the motor power if required.

en Description of the pump
16 WILO SE 2021-08
ƒThe fluid must be sediment-free.
ƒWilo’s approval must be obtained for the use of other fluids.
ƒThe compatibility of the standard seal/standard mechanical seal with the fluid is
generally given under normal system conditions.
Special circumstances may require special seals, for example:
–solids, oils or EPDM-attacking substances in the fluid,
–air content in the system, etc.
Observe the safety data sheet for the fluid to be pumped!
5.3 Scope of delivery ƒPump
ƒInstallation and operating instructions
5.4 Accessories Accessories must be ordered separately:
Atmos GIGA-I/-D/-B:
ƒPTC thermistor tripping unit for switch cabinet installation
Atmos GIGA-I/-D:
ƒ3mounting brackets with fixation material for installation on a base
Atmos GIGA-D:
ƒBlind flanges for repair work
Atmos GIGA-B:
ƒSupports for installation on a base or baseplate for rated powers of 5.5kW and
higher
For a detailed list, consult the catalogue and spare parts documentation.
6 Description of the pump All the pumps described here are low-pressure centrifugal pumps in compact construc-
tion design with a coupled motor. The mechanical seal is maintenance-free. The pumps
can be installed both directly as a pipe installation pump in a sufficiently anchored pipe
or placed on a foundation base.
The installation options depend on the pump size. Suitable Wilo control devices (e.g.
Wilo-CC-HVAC system) can control the power of the pumps continuously. This allows
optimisation of the pump output for the demands of the installation and economically
efficient pump operation.
Version Atmos GIGA-I
Fig.3: View Atmos GIGA-I
The pump housing has an in-line design, i.e. the flanges on the suction and discharge
sides lie along a centre line. All pump housings are provided with pump support feet. In-
stallation on a foundation base is recommended for rated powers of 5.5kW and higher.
Version Atmos GIGA-D
Fig.4: View Atmos GIGA-D
Two pumps are arranged in a shared housing (twin-head pump). The pump housing has
an in-line design. All pump housings are provided with pump support feet. Installation
on a foundation base is recommended for rated powers of 4kW and higher.
Only the base-load pump is operated in control mode in connection with a control
device. The second pump is available to fulfil full load operation requirements as an
auxiliary peak load. The second pump can adopt the reserve function in the event of a
fault.
NOTICE
Blind flanges (accessories) are available for all pump types/housing sizes of the At-
mos GIGA-D series. When replacing the motor impeller unit (motor with impeller and
terminal box), a drive can therefore remain in operation.

Description of the pump en
Installation and operating instructions Wilo-Atmos GIGA-B 17
NOTICE
To ensure the standby pump is ready for operation, operate the standby pump every
24h at least once a week.
Version Atmos GIGA-B
Fig.5: View Atmos GIGA-B
Spiral housing pump with dimensions in accordance with DINEN733.
Pump with cast feet on the pump housing. From 5.5kW motor power: Motors with cast
or screwed-on feet.
Installation on a foundation base is recommended for rated powers of 5.5kW and
higher.
6.1 Anticipated noise levels Motor
power [kW]
Measuring surface sound-pressure level Lp, A [dB(A)] 1)
2900rpm 1450rpm 950rpm
Atmos
GIGA-I/-D/-
B
(-D in indi-
vidual oper-
ation)
Atmos
GIGA-D
(-D in paral-
lel opera-
tion)
Atmos
GIGA-I/-D/-
B
(-D in indi-
vidual oper-
ation)
Atmos
GIGA-D
(-D in paral-
lel opera-
tion)
Atmos
GIGA-I
0.25 – – 45 48 –
0.37 – – 45 48 -
0.55 57 60 45 48 -
0.75 60 63 51 54 -
1.1 60 63 51 54 -
1.5 64 67 55 58 -
2.2 64 67 60 63 -
3 66 69 55 58 -
4 68 71 57 60 -
5.5 71 74 63 66 -
7.5 71 74 63 66 65
11 72 75 65 68 65
15 72 75 65 68 -
18.5 72 75 70 73 -
22 77 80 66 69 -
30 77 80 69 72 -
37 77 80 70 73 -
45 72 - 72 75 -
55 77 - 74 77 -
75 77 - 74 - -
90 77 - 72 - -
110 79 - 72 - -
132 79 - 72 - -
160 79 - 74 - -
200 79 - 75 - -
250 85 - - - -

en Installation
18 WILO SE 2021-08
Motor
power [kW]
Measuring surface sound-pressure level Lp, A [dB(A)] 1)
2900rpm 1450rpm 950rpm
1) Spatial mean value of sound-pressure levels on a square measuring surface at a dis-
tance of 1m from the surface of the motor.
Table3: Anticipated noise levels (50Hz)
7 Installation
7.1 Personnel qualifications ƒInstallation/dismantling work: The installation/dismantling must be carried out by a
qualified technician who is trained in the use of the necessary tools and fixation ma-
terials.
7.2 Operator responsibilities ƒObserve national and regional regulations!
ƒObserve locally applicable accident prevention and safety regulations of professional
and trade associations.
ƒProvide protective equipment and ensure that the protective equipment is worn by
personnel.
ƒObserve all regulations for working with heavy loads.
7.3 Safety
DANGER
Risk of fatal injury due to lack of protective devices!
Due to missing protective devices of the terminal box or in the range of the coup-
ling/motor, electric shock or contact with rotating parts can lead to life-threatening
injuries.
• Before commissioning, safety devices such as coupling covers that were re-
moved must be reinstalled!
DANGER
Risk of fatal injury from falling parts!
The pump itself and pump parts can be extremely heavy. Falling parts pose a risk of
cuts, crush injuries, bruises or impacts, which can be fatal.
• Always use suitable lifting equipment and secure parts against falling.
• Never stand underneath a suspended load.
• During storage and transport, as well as before all installation and assembly
work, ensure that the pump is in a safe position and standing securely.
WARNING
Hot surface!
The entire pump can become very hot. There is a risk of burns!
• Allow the pump to cool down before commencing any work!
WARNING
Risk of scalding!
At high fluid temperatures and system pressures, allow the pump to cool down first
and then depressurise the system.
CAUTION
Damage to the pump due to overheating!
The pump must not be allowed to operate dry for more than 1minute. Dry running
causes a build-up of energy in the pump, which can damage the shaft, impeller, and
mechanical seal.
• Make sure that the volume flow does not fall below the minimum value Qmin.

Installation en
Installation and operating instructions Wilo-Atmos GIGA-B 19
Calculation of Qmin:
Qmin = 10% xQmax pump
7.4 Preparing the installation Check whether the pump complies with the specifications on the delivery note; report
any damage or missing parts to Wilo immediately. Check slat crates/boxes/wrappings
for spare parts or accessory components which could be included with the pump.
WARNING
Risk of personal injury and property damage due to improper handling!
• Install only after completion of all welding and soldering work and after the
pipeline system has been flushed, if required.
⇒ Dirt can cause the pump to fail.
Installation location ƒThe pump must be protected from the weather and installed in a frost-/dust-free,
well ventilated, vibration-isolated environment that is not potentially explosive. The
pump must not be installed outdoors! Observe the specifications in the chapter "In-
tended use"!
ƒMount the pump in a readily accessible place. This makes it easier to complete in-
spections, maintenance (e.g. mechanical seal change) or replacement in the future.
Observe the minimum axial distance between the wall and the fan cover of the mo-
tor: free removal dimension of at least 200mm+diameter of the fan cover.
ƒInstall a device for attaching hoisting gear above the set-up site of the pumps. Total
weight of the pump: see catalogue or data sheet.
Base
CAUTION
A faulty foundation or incorrect installation of the unit!
A faulty foundation or incorrect installation of the unit on the foundation can lead to
defects of the pump.
• These defects are not covered by the warranty.
• Never set up the pump unit on unfortified surfaces or surfaces that cannot bear
loads.
NOTICE
For a vibration-insulated installation, a simultaneous isolation of the base block it-
self from the building structure by an elastic intermediate layer (e.g. cork or Mafund
pad) is required for few pump types.
WARNING
Personal injury and property damage due to improper handling!
Transport lugs mounted on the motor housing can tear out if the load is too heavy.
This can lead to serious injuries and damage to the product!
• Only lift the pump with approved lifting gear (e.g. block and tackle, crane). See
also chapter “Transport and storage”.
• Transport lugs mounted on the motor housing are only permitted for transport-
ing the motor!
NOTICE
Simplify subsequent work on the unit!
• To ensure the entire unit does not have to be emptied, install shut-off valves up-
stream and downstream of the pump.
If need be, the necessary non-return valves are to be provided.

en Installation
20 WILO SE 2021-08
Condensate drainage
ƒWhen using the pump in air conditioning or cooling systems:
The condensate that forms in the lantern can be drained specifically via an existing
drilled hole. A drain pipe can also be connected to this opening and a small amount
of escaping liquid can be drained off.
ƒInstallation position:
All installation positions except for “motor facing down” are allowed.
ƒThe air vent valve (Fig.I/II/III/IV/V, Item1.31) must always face upwards.
Atmos GIGA-I/-D
Fig.6: Atmos GIGA-I/-D
NOTICE
The installation position with horizontal motor shaft is permitted for the Atmos
GIGA-I and Atmos GIGA-D series only up to a motor power of 15kW.
Motor support is not required.
For motor powers >15kW, only install in a position with vertical motor shaft.
Atmos GIGA-B
Fig.7: Atmos GIGA-B
NOTICE
For monobloc pumps larger than 30kW, only horizontal installation is permissible.
Install monobloc pumps of the Atmos GIGA-B series on adequate foundations or
mounting brackets (Fig.7).
The motor must be supported from a motor power of 18.5 kW. See installation ex-
amples Atmos GIGA-B.
Only pump type design B/C:
For motor powers of 37kW 4-pole and 45kW 2-pole, the pump housing and motor
must be supported. Suitable supports from the Wilo accessories range can be used
for this purpose.
When installing the motor in a vertical position, the pump housing foot and motor
housing foot must be screwed on. This must be done stress-free.
Unevenness between motor and pump housing feet must be levelled out for stress-
free installation.
NOTICE
The motor terminal box must not face downward. If necessary, the motor or motor
impeller unit can be rotated once the hexagon head screws have been loosened.
While rotating the motor or motor impeller unit, ensure that the housing O-ring seal
is not damaged.
Installation examples Atmos GIGA-B: