Installation; Electrical Connection - Grundfos DSS Installation And Operating Instructions Manual

7. Installation

• During installation refer to Plant Engineering Drawings,
Construction Drawings, Engineering Documentation, System -
General Arrangement, P&ID and Electrical Drawings if
included in the scope of delivery.
All DSS system pipes are supported within DSS. Make sure to
adequately support all pipes outside DSS, including inlet,
outlet, drain or vent pipes, to the site floor, wall or ceiling. Do
not use the DSS pipes for support.
• Allow for clearance around the DSS system for regular
maintenance to be safely carried out.
• Allow provisions to drain the system pipes for maintenance
and repair.
• Depending on the vapor pressure of the dosing medium, you
may need to mount the inlet line with a continuous upward
slope from the supply tank to reduce gas locking, especially in
volatile media.
1. Mount the DSS system to the wall if it is a wall-mounted
system or on the floor if it is a floor-mounted system.
2. Position DSS on an even, solid surface that is flat, hard,
vibration free and leveled (i.e. a concrete floor or foundation).
3. Install the on-site inlet, outlet and drain or vent pipes to the
DSS termination point for the system inlet (1), outlet (16) and
drain or vent pipe (13) in fig. 2. Make sure that the inlet
conditions do not exceed the maximum suction lift capability
of the dosing pump as described in the pump installation and
operating instructions.
4. Check that O-rings are installed in all unions.
5. Check the tightness of all threaded connections.
Pipes, components and equipment connections may
Caution
become loose during transport or storage.
6. If required, install the pulsation dampers on DSS according to
the pulsation damper connection instructions received with
the DSS system.
The pulsation dampers may have been removed
Note
Note
from DSS to prevent damage during transport.
7. If required, fit the calibration column into the 1/2" NPT
connection on DSS in pos. 3 in fig.
8. A calibration column overflow accessory that can be fitted on
top of the calibration column, is shipped separately. Install the
calibration column overflow accessory with an appropriate
length of 1/2" OD flexible tubing directed back to the dosing
tank.
2 on page 8.
Keep the minimum diameter of the inlet and outlet
lines. Too small diameters may cause damage to the
DSS system and the dosing pump.
Depending on the viscosity and density of the dosing
medium, the number of valves and fittings, and the
length of the pipes, you may have to increase the
Caution
pipe diameter.
The diameter and length of the outlet and inlet pipe
or tube must be dimensioned in such a way that
pressure peaks do not exceed the pressure limit
during the dosing stroke and the minimum pressure
does not fall below the vapor pressure of the dosing
medium during the suction stroke.
Warning
Make sure that the room where the DSS system is
installed has sufficient ventilation.
Warning
Protect the DSS system against unauthorized
access.
The dosing medium must be in liquid state. Observe
Caution
the freezing point of your dosing medium.
Keep the DSS system freely accessible for operation
Note Note
and maintenance.
Provide sufficient lighting.

7.1 Electrical connection

Warning
The electrical work must be carried out by an
authorized individual. Read manuals for all electrical
components supplied with the DSS system or
supplied separately. Make sure that the system is
suitable for the power supply to which it is to be
connected. The power supply, equipment and
components (if included in the scope of delivery)
must be installed, connected and tested by an
authorized electrician in accordance with local codes
and regulations and any wiring drawings supplied.
• DSS systems installed outdoors must be sheltered to allow
trouble-free operation.
– Exceptions are DSS systems equipped with an IP65 outdoor
cabinet with integrated heating.
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