Pompetravaini TRSK 2002/1, Руководство по эксплуатации, Страница: 15 / 32

Operating manual liquid ring vacuum pumps TRVK - TRSK
15
8 - ELECTRICAL CONNECTIONS
Electrical connections must be made exclusively by qualified personnel in accordance with the
instructions from the manufacturer of the motor or other electrical components and must adhere to the
local National Electrical Code.
FOLLOW ALL SAFETY PRECAUTIONS AS LISTED IN CHAPTER 2.
BEFORE DOING ANY WORK TO THE INSTALLATION DISCONNECT ALL POWER SUPPLIES.
It is recommended that electric motors be protected against overloading by means of circuit breakers and/or fuses.
Circuit
breakers and fuses must be sized in accordance with the full load amperage appearing on the motor nameplate.
It is advisable to have an electrical switch near the pump for emergency situations.
Prior to connecting the electrical wiring, turn the pump shaft by hand to make sure that it rotates freely.
Connect the electrical wiring in accordance with local electrical codes and be sure to ground the motor.
Motor connection should be as indicated on the motor tag (frequency and voltage) and as discussed in the motor
instruction manual. It is recommended that motors over 5.5 kW be wired for Star-Delta start-up, to avoid electrical
overloads to the motor and mechanical overloads to the pump. Be sure to replace all safety guards before switching on
the electrical power. If possible check the direction of rotation before the motor is coupled to the pump but protect the
motor shaft to prevent any accidents.
When this is not possible briefly jog the pump to check its direction of rotation(see arrow on pump for correct rotation).
If the direction must be changed two of the three electrical wire leads must be alternated with each other (at the terminal
box or at the motor starter).
Please be aware that rotation in the wrong direction and/or pump running dry may cause severe pump damage.
Electrical instrumentation such as solenoid valves, level switches, temperature switches, etc. which are supplied with the
pump or systems must be connected and handled in accordance with the instructions supplied by their respective
manufacturers.
When the pump is coupled on baseframe carry out the ground connection also for the baseframe on the preposed position
with screw or through hole marked by the ground connection symbol.
Remove a portion of the paint on the connection point to ensure electrical continuity between the base and the earthing
cable.
9 - INSTALLATION INSTRUCTIONS
Information to determine the piping sizes and floor space requirements can be obtained from dimension drawings and
other engineering data.
The information required is:
- size and location of suction and discharge flanges
- size and location of service liquid connection and connections for cooling, heating, flushing, draining, etc.
- location and size for mounting bolts for monoblock pump and/or baseplate and/or frame.
In the event additional accessories are required to complete the installation such as separators, piping, valves, etc. refer
to chapters 9.1 to 9.3. Proper lifting devices should be available for installation and repair operations.
Pump assembly should be installed in an accessible location with adequate clear and clean space all around for
maintenance, so that an efficient and proper installation can be made.
It is important to have proper room around the unit for ventilation of motor and air cooled radiator, if applicable. Avoid
installing the unit in hidden locations, dusty and lacking of ventilation.
Select a mounting pad that will minimise vibrations or torsion of the pump baseplate or frame. It is generally preferred to
have a concrete base or sturdy steel beams.
It is important to provide adequate anchor bolting for the pump frame or baseplate to be firmly attached to the foundations
(see fig. 17).
ANCHOR BOLT
CONCRETE
SPACER
BASEPLATE
Fig. 17
Concrete pads and other concrete works must be aged, dry and clean before the pump assembly can be positioned in
place. Complete all the work relating to the foundations and grouting of the pump assembly, before proceeding with the
mechanical and electrical portion of the installation.