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7.1
Personnel qualifications
7.2
Filling and venting
26
CAUTION
Risk of material damage due to the formation of condensate!
When using the pump in air-conditioning or cooling applications, the
formation of condensate can cause motor damage. The motors are
equipped with condensate drainage holes, which are factory-sealed with
plastic plugs.
• Open the condensate drainage holes in the motor housing at regular
intervals and drain the condensate.
• Then reseal the condensate drainage holes with plastic plugs.
NOTICE
If the plastic plugs are removed, protection class IP55 is no longer en-
sured!
•
Electrical work: A qualified electrician must carry out the electrical work.
•
Operation/control: Operating personnel must be instructed in the functioning of the
complete system.
NOTICE
In the standard version of the Atmos GIGA-NHT pump, the air vent valve
is not located on the pump housing, but rather on the sealing chamber.
The suction line and pump are vented via a suitable venting device on the
pressure flange of the pump. An optional air vent valve is available. The
sealing chamber must be vented before commissioning the pump.
WARNING
Danger of personal injury and property damage due to ex-
tremely hot or extremely cold pressurised fluid!
Depending on the temperature of the fluid, when the venting screw is
opened completely, extremely hot or extremely cold fluid in liquid or va-
pour form may escape or shoot out at high pressure. Fluid may shoot out
at high pressure depending on the system pressure.
• Make sure the venting screw is in a suitable, secure position.
• Always exercise caution when opening the venting screw.
Procedure for venting systems where the fluid level lies above the suction port of the
pump:
•
Open the shut-off device on the discharge side of the pump.
•
Slowly open the shut-off device on the suction side of the pump.
•
To vent, open the venting screw on the discharge side of the pump or on the pump.
•
Close the venting screw as soon as fluid escapes.
Procedure for filling/venting systems with a non-return valve, where the fluid level lies
below the suction port of the pump:
•
Close the shut-off device on the discharge side of the pump.
•
Open the shut-off device on the suction side of the pump.
•
Fill in liquid through a funnel until the suction line and the pump are completely filled.
Installation and operating instructions • Wilo-Atmos GIGA-NHT • Ed.01/2023-10
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