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Description of the device
3.6
R esidual risks
This device has been manufactured to the current state of the art. However,
some residual risk cannot be excluded.
CAUTION
Risk of burns on hot surfaces
Hot surfaces in heating systems can cause burns to the skin.
•
Wear protective gloves.
•
Please place appropriate warning signs in the vicinity of the device.
CAUTION
Risk of injury due to pressurised liquid
If installation, removal or maintenance work is not carried out correctly, there i s a
risk of burns and other injuries at the connection points, if pressurised hot water
or hot steam suddenly escapes.
•
Ensure proper installation, removal or maintenance work.
•
Ensure that the system is de-pressurised before performing installation,
removal or maintenance work at the connection points.
WARNING
Risk of injury due to heavy weight
The devices are heavy. Consequently, there is a risk of physical injury and
accidents.
•
Use suitable lifting equipment for transportation and installation.
CAUTION
Risk of injury when upon coming into contact with glycol containing water
Contact with glycol containing water in plant systems for cooling circuits can
result in irritation of the skin and eyes.
–
Use personal protective equipment (safety clothing, gloves and goggles,
for example).
4
De s cription of the device
The Servitec is a degassing and make-up station. Its main areas of application are
heating and cooling circuits and systems in which malfunctions due to dissolved
or free gases are to be prevented. The Servitec provides the following safety
features:
• No direct intake of air due to control of pressurisation with automatic make-up.
•
No circulation issues caused by free bubbles in the circuit water.
•
Reduced corrosion damage due to oxygen removal from fill and make-up
water.
Note!
Operation and functioning at high system temperatures (>70°C):
If a vacuum is created, the boiling point of the medium reduces. This
property results in a change in volume of the medium in the vacuum
spray tube. If the medium boils, the pressure increases and counteracts
the vacuum created in the spray tube. Thanks to this characteristic, the
type of degassing changes from vacuum degassing to thermal
degassing. If the medium is boiling, the solubility of gases is almost zero.
Moreover, a higher pump flow rate does not automatically result in a
higher vacuum (at temperatures >70°C).
24 — English
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Vacuum spray degassing — 24.04.2020 - Rev. A
Overview
Servitec 35 – 60
Servitec 75 – 95
Degassing valve "DV"
Vacuum gauge "PI"
Control Touch controller
2-way motor control valve "CD" upstream of vacuum spray tube
2-way motor control valve "WV" upstream of vacuum spray tube
Ball control ball valve "PV" downstream of pump "PU"
Connection "WC" for the make-up
•
Input for gas-rich water from the make-up
Connection "DC" for degassing
•
Input for gas-rich water from the facility system
Connection "DC" for degassing
•
Degassed water outlet
Pressure switch "PIS"
Pump "PU"
Insufficient water switch
Feed and drain cock "FD"
Main switch
Vacuum spray tube "VT"
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