Grundfos LiqTec, Инструкция по установке и эксплуатации

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2. Receiving the product
On receipt of the product, do the following:
•
Check that the product is as ordered.
If the product is not as ordered, contact the
supplier.
• Check that no visible parts have been damaged.
If any visible parts have been damaged, contact
the transport company.
3. Installing the product
Before installation, check the following:
•
LiqTec must be suitable for the supply voltage
and frequency on the installation site.
• LiqTec must not have any damage from
transportation.
The installation must be carried out by authorised
persons in accordance with local regulations.
All safety regulations must be observed on the
installation site.
3.1 Location
LiqTec is designed for indoor installation but it can
also be installed outdoor. The product must always
be mounted in a suitable cabinet.
3.2 Enclosure class
In order to reduce the external pollution level to
maximum 2, LiqTec must be installed in a protecting
environment with minimum IPX4 enclosure
according to IEC 60529. The cabinet must be of a
flame-retardant material.
3.3 Mechanical installation
LiqTec can be fitted to a DIN rail. It must be built into
a control cabinet.
See illustrations on page
147 .
The LiqTec sensor has a 1/2 inch thread for
mounting it into the pump. The sensor must be
mounted in an appropriate place where detection of
dry run is required to protect for example a shaft
seal.
3.4 Electrical connections
Example of electrical connection, see page 148 .
3.4.1 Inputs and outputs
Alarm/Run relay output: Potential-free changeover
contact.
Maximum contact load: 250 V, 1 A, AC, inductive
load
.
The PTC and sensor input has a 11 V DC level.
The reset input has a 5 V DC level.
WARNING
Electric shock
Death or serious personal injury
- Before starting any work on the product,
make sure that the power supply has
been switched off and that it cannot be
accidentally switched on.
- Always use suitable insulated cables.
- The insulation between the cabinet and
the product must have a suitable
insulation resistance or the cabinet
must be connected to protective earth.
- Ensure separation between power
cables and sensor cables.