Fit A Mechanical Booster Pump (Optional); Connect The Cooling-Water Supply - Edwards DRYSTAR GV Series Instruction Manual

A705-74-880 Issue K
1. Refer to Figure 12. Undo and remove the four bolts (13) that secure the coupling cover (12) to the coupling
housing, then remove the coupling cover.
2. Look into the coupling housing (7) and watch the drive hub (16), switch on the pump for one or two seconds,
then switch the pump off.
3. If the drive hub (16) does not rotate in the correct direction shown by an arrow on the pump-motor.
item 18), the direction of rotation is incorrect. If the direction of rotation is incorrect:
Isolate the pump from the electrical supply.

Reverse the electrical supply phase-wires L1 and L2 in the pump-motor terminal-box: refer to

Repeat Step 2 to ensure that the direction of rotation is now correct.

4. Refer to Figure 12. Refit the coupling cover (12) and secure with the four bolts (13). Tighten the bolts to a
torque between 3 and 5 Nm.
3.8

Fit a mechanical booster pump (optional)

If there is a requirement to use an mechanical booster pump or pumps with the GV pump, it must be fitted at this
stage of installation. This enables a booster to be fitted on top of the pump utilising the two inlet ports. Refer to
Figure 1 items (6) and (26).
Details of the standard connection kits available from Edwards are given in
procedures in the instruction manual supplied with the connection kit. The side inlet to the pump is protected by a
cover flange and can be used for connection of a side-mounted booster. Contact Edwards for specialist advice about
this application.
3.9

Connect the cooling-water supply

The pump must be filled with cooling-water before running or there is a risk of damage to the pump on starting.
The following procedure assumes that direct cooling (as supplied) will be used for the GV pump. If you want to use
indirect cooling on the GV pump, install the appropriate Indirect Cooling Kit (see
cooling-water supply as described in the instruction manual supplied with the Kit.
Take note of the following when you connect the cooling-water supply and return pipelines:
If there is a requirement to connect more than one GV pump to the water supply, they must be connected in parallel
and not in series.
We recommend that a suitable ball-type flow indicator is incorporated in your water return pipeline, to provide a
visual indication of cooling-water flow through the GV pump.
If the water supply contains particulates. We recommend that a suitable filter is fitted in the water supply pipeline,
To ensure a constant running temperature a Temperature Control valve (TCV) is fitted in the cooling-water supply
line. This valve controls the pump temperature by opening when the cooling jacket reaches 122°F (50°C) and by
closing when the pump cooling-water temperature is below 122°F (50°C).
This valve is factory set to give optimum pump performance and is not adjustable. Do not attempt to modify the
valve.
Because there is no cooling-water flow when the pump is first switched on, there is a requirement to charge the
pump-cooling jacket with cooling-water during installation.
Page 22
CAUTION
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Edwards and the Edwards logo are trademarks of Edwards Limited.
Section 7.4. Refer to the installation
Section 7.4) and connect to the
(Figure 1,
Section 3.5.