Grundfos DTS, Инструкция по установке и эксплуатации

Страница: 13 / 140

English (GB)
13
5.3 Tightness check
1. Before filling the dosing tank, check that the following
requirements are fulfilled:
– the suction lance is connected
– the optional drain valve is fully closed
2. Only with drain valve: Fill the dosing tank with water and
check for leaks.
5.4 Electrical connection
• Fuse the motor with a motor overload switch of the appropriate
rating.
5.4.1 Electrical connection of the dosing pump
Refer to the installation and operating instructions for the dosing
pump.
5.4.2 Electrical connection of the electric stirrer
Refer to the installation and operating instructions for the electric
stirrer.
5.4.3 Electrical connection of the level switch
The suction unit and the electric stirrer are each fitted with a level
switch.
• Plug the connector of the level switch of the suction line into
the corresponding connector of the dosing pump.
The separate level control of the electric stirrer can be used via
an external control unit to deactivate the electric stirrer when the
tank is running empty.
5.4.4 Inputs and outputs
Refer to the installation and operating instructions for the dosing
pump and the suction line.
6. Operation
The dosing tank is not operated. Within the system, it simply
serves as a reservoir for storage and dosing of the medium.
7. Maintenance
The dosing tank requires no maintenance.
7.1 Cleaning
Clean the dosing tank and components, if necessary.
7.2 Service
Should a fault arise please provide an accurate description of the
problem.
Please refer to the nameplate for the technical data.
Caution
Some media react with water.
If you dose a medium that reacts with water, use a
suitable other medium for the tightness check.
Warning
Electrical connections must be established by trained
personnel.
Observe the local safety regulations.
Protect the cable connections and plugs against
corrosion and humidity.
Caution
Before connecting the mains cables, check whether
the supply voltage stated on the nameplates of the
dosing pump and electric stirrer matches the local
figures (permissible mains frequency deviation: ± 5
%). An incorrect mains voltage may destroy the
components.
Caution
All the system components must be ready for
operation.
Follow the installation and operating instructions for
the components and the dosing pump used.
Warning
Never reach into the dosing tank when the electric
stirrer is running.
The rotating propeller and mixing shaft may result in
serious injuries.
Caution
Before switching on the electric stirrer, fill the dosing
tank with dosing medium to at least 20 cm above the
propeller.
If this is not done, turbulence may occur when
stirring and the mixing shaft may be damaged.
Caution
The point at the top of suction unit where the suction
line and level cable emerge must not be blocked or
sealed.
Air must enter there, in order to compensate for
pressure in the dosing tank.
Caution
Observe the installation and operating instructions
for the components used.
Warning
When dosing dangerous media, observe the
corresponding safety precautions.
Wear protective clothing (gloves and goggles).
Warning
All service work must be carried out by authorised
and qualified personnel.