Safety Instructions; Electrical Connections - Grundfos DMH 25X Manual Del Usuario

English (GB) Safety instructions
Original safety instructions
These safety instructions give a quick overview of the safety
precautions to be taken in connection with any work on this
product.
Observe these safety instructions during handling, installation,
operation, maintenance, service and repair of this product.
These safety instructions are a supplementary document, and all
safety instructions will appear again in the relevant sections of
the installation and operating instructions.
Keep these safety instructions at the installation site for future
reference.
General information
Warning
To operate a pump which has been identified as an
explosion-proof pump for the dosing of inflammable
media or for operation in potentially explosive
operating sites in accordance with the EC directive
2014/34/EU, refer to the enclosed manual
"ATEX-approved pumps" in addition to this manual.
Warning
Other applications or the operation of pumps in
ambient and operating conditions, which are not
approved, are considered improper and are not
permitted. Grundfos accepts no liability for any
damage resulting from incorrect use.
Safety
Warning
The pump must be installed in a position where it is
easily accessible during operation and maintenance
work.
Observe the flow direction of valves (indicated by an
arrow on the valve)!
Only tighten plastic valves by hand.
Only use the prescribed line types!
Electrical connections must only be carried out by
qualified personnel!
Warning
Make sure that the pump is suitable for the actual
dosing medium!
Observe the chemical manufacturer's safety
instructions when handling chemicals!
Do not operate the pump next to closed valves.
Warning
The pump housing, control unit and sensors must
only be opened by personnel authorised by
Grundfos!
Repairs must only be carried out by authorised and
qualified personnel!
Wear protective clothing (gloves and goggles) when
working on the dosing head, connections or lines!
Before removing the dosing head, valves and lines,
empty any remaining medium in the dosing head into
a drip tray by carefully unscrewing the suction valve.
Warning
To operate a pump which has been identified as an
explosion-proof pump for the dosing of inflammable
media or for operation in potentially explosive
operating sites in accordance with the EC directive
2014/34/EU, refer to the enclosed manual
"ATEX-approved pumps" in addition to this manual.
4
Technical data
Warning
Observe the chemical manufacturer's safety
instructions when handling chemicals!
Product description and accessories
Warning
The contact pressure gauge (Ex) in explosion-proof
version with switch amplifier should be used if the
pump is fitted with an explosion-proof motor.
Warning
Observe the chemical manufacturer's safety
instructions when handling chemicals!
Make sure that the pump is suitable for the actual
dosing medium!
Installation
Warning
Observe the specifications for the installation
location and range of applications.
Warning
Faults, incorrect operation or faults on the pump or
system can, for example, lead to excessive or
insufficient dosing, or the permissible pressure may
be exceeded. Consequential faults or damage must
be evaluated by the operator and appropriate
precautions must be taken to avoid them!
Warning
Risk of hot surfaces!
Pumps with AC motors may become hot.
Allow a minimum space of 100 mm to the fan cover!
Warning
To protect the dosing system against excessive
pressure build-up, install a relief valve in the
discharge line.
Only use the prescribed line types!
All lines must be free from strain!
Avoid loops and buckles in the tubes!
Keep the suction line as short as possible to avoid
cavitation!
If necessary, use swept bends instead of elbows.
Observe the chemical manufacturer's safety
instructions when handling chemicals!
Make sure that the pump is suitable for the actual
dosing medium!
The flow must run in the opposite direction to gravity!

Electrical connections

Warning
Electrical connections must only be carried out by
qualified personnel!
Disconnect the power supply before connecting the
power supply cable and the relay contacts!
Observe the local safety regulations!
The pump housing must only be opened by
personnel authorised by Grundfos!
Protect the cable connections and plugs against
corrosion and humidity.
Only remove the protective caps from the sockets
that are being used.