Edwards RV3 Instruction Manual

4.7.3 Check the direcon of rotaon
CAUTION:
Ensure that the pump-motor rotates in the correct direcon. If it does not, the pump
and vacuum system can become pressurised.
1. Refer to Figure: The RV pump. Watch the motor cooling-fan through the motor fan-
cover (13).
2.
Switch-on the electrical supply to the motor for a few seconds.
3.
Check that the motor cooling-fan rotates in the correct direcon shown by the
arrow on the motor mounng plate. If the direcon of rotaon is incorrect:
▪
Switch o the electrical supply immediately.
▪
Isolate the pump from the electrical supply.
▪
Remove the terminal-box cover and swap wires L1 and L3: see Figure: Three-
phase electrical connecons: 200–230 V and Figure: Three-phase electrical
connecons: 380–460 V.
▪
Ret the cover to the terminal-box.
4.8 Inlet and outlet connecons
WARNING:
Connect the exhaust to a suitable treatment plant to prevent the discharge of
dangerous gases and vapours to the surrounding atmosphere. Use a catchpot to
prevent the drainage of contaminated condensate back into the pump.
Before connecng the pump to the vacuum system, t the centring-ring and inlet-lter
(supplied with the pump) to the pump inlet-port (see Figure: Dimensions (mm) (item 4)).
Take note of the following informaon when connecng the pump to the vacuum
system. Refer to Service and spares on page 50 for details of the accessories menoned
below. Use standard NW25 ngs (not supplied) when connecng the pump.
▪ For opmum pumping speeds, ensure that the pipeline connected to the pump-
inlet is as short as possible and has an internal diameter of 25 mm or larger.
▪
Support the vacuum pipelines to prevent loading of the coupling-joints.
▪
If necessary, incorporate exible bellows in the system pipelines to reduce the
transmission of vibraon and to prevent loading of coupling-joints. If using exible
bellows, ensure that bellows which have a maximum pressure rang which is
greater than the highest pressure that can be generated in the system are used.
We recommend using manufacturers exible bellows.
▪
Use a suitable inlet trap if pumping condensable vapours or if the pump is to be
used for very dusty applicaons.
▪
Use a suitable valve to isolate the pump from the vacuum system if pumping
condensable vapours or to maintain vacuum when the pump is switched o.
▪
Ensure that sealing surfaces are clean and scratch-free.
In any of the following circumstances, ng an oil mist lter to the pump outlet is
recommended:
03/2021 - ©Edwards Limited
Page 32A65201880_AA
A65201880_AA - Installaon

Edwards RV3 Specifications

General

Brand	Edwards
Model	RV3
Category	Water Pump
Language	English