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A301-51-880 Issue T
3.4
Fill the pump with oil
WARNING
Changing the oil in an EH pump from hydrocarbon to PFPE (Fomblin) could potentially cause a
safety hazard. Fomblin EH pumps are generally used in hazardous applications which may involve
the pumping of gases with high concentrations of oxygen. If hydrocarbon oil comes into contact
with gases with an oxygen concentration greater than 25%, an explosion can occur.
Therefore, if you want to convert an EH pump that has been used with hydrocarbon oil to use PFPE
(Fomblin) oil, you cannot simply flush the EH pump with new PFPE oil. You must return the EH
pump to a Edwards Service Centre for overhaul and cleaning by qualified Edwards service
engineers. The change in oil type requires a complete strip down of the EH pump, and thorough
cleaning of all parts, so that all traces of hydrocarbon oil are removed.
WARNING
Ensure that the correct grade of oil is used and that the oil-levels in the EH pump are correct. If
an incorrect oil is used or if an oil-level is incorrect, EH pump performance may be affected and
the EH pump may be damaged, which will compromise its constructional safety.
3.4.1
Hydrokinetic drive/gearbox
We recommend that the hydrokinetic drive/gearbox oil-level is maintained at the recommended oil-level shown in
Figure
11, item 5; if the oil-level is above or below the recommended oil-level, the performance of the EH pump may
be affected.
Do not allow the oil-level to fall below the bottom of the reflector plate
(Figure
11, item 4) or the EH pump may be
damaged.
1. Remove the hydrokinetic drive/gearbox oil filler-plug
(Figure
1, item 3).
2. Refer to
Figure
11. Fill the hydrokinetic drive/gearbox with the recommended type of oil until the oil-level
reaches the recommended oil-level (5) at the top of the reflector plate (4) in the oil-level sight-glass (3).
3. Refit the hydrokinetic drive/gearbox oil filler-plug.
3.4.2
Shaft-seal reservoir
WARNING
Ensure that the correct vented filler-plug is refitted in the shaft-seal reservoir. If you use a non-
vented plug, the reservoir will be pressurised and the oil sight-glass may fracture.
We recommend that you fill the shaft-seal reservoir so that the oil-level is at the recommended oil-level, shown in
Figure
11, item 2.
You can operate the EH pump as long as the oil-level is above the bottom of the reflector plate. Do not allow the
shaft-seal oil-level to fall below the bottom of the reflector plate or the EH pump may be damaged. You must use
the same oil you used to fill the hydrokinetic drive/gearbox.
1. Remove the shaft-seal reservoir vented oil filler-plug
(Figure 1
and 2, item 2).
2. Refer to
Figure
11. Fill the shaft-seal reservoir with oil until the oil-level is at the recommended oil-level (2) at
the top of the reflector plate (6).
3. Refit the vented oil filler-plug.
© Edwards Limited 2007. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
A301-51-880 Issue T
3.5
Cooling-water connections (all EH1200, EH2600 and EH4200
model pumps only)
Note:
Refer to
Section 2.8
for the cooling-water requirements. Note that there are minimum flow rate and flow-
switch requirements specified for ATEX compliant EH pumps operated in ATEX certified systems.
3
Connect the cooling-water supply and return lines to the
/
inch BSP connectors. One connector is on the rear of
8
the hydrokinetic drive/gearbox, the other connector is on the underside of the gear-cover. You can connect the
supply and return lines to either of the connectors; the direction of cooling-water flow is not important.
Refer to
Section 2.8
for the minimum cooling-water flow rate required. If the danger of the condensation of gases in
the booster is not process critical, always connect the supply line to the gearbox cover first.
3.6
Electrical connections
WARNING
Ensure that the electrical installation of the EH pump conforms with your local and national safety
requirements. It must be connected to a suitably rated (refer to
Section
2.5) fused and protected
electrical supply and a suitable earth (ground) point.
WARNING
If a chemical or ATEX compliant EH pump is used in a potentially explosive atmosphere or is used
to pump a potentially explosive atmosphere, the pump must be powered by an electrical supply at
the rated frequency of the pump motor. If it is not, you may invalidate any ATEX certification of
the pump, and the motor may overheat which could create an ignition hazard.
If you want to use a variable speed drive to operate the pump motor, contact Edwards for advice.
3.6.1
Electrical supply configuration
The motors of the EH250, EH500 and EH500IND pumps are supplied configured for 'low-voltage' operation (240 V and
lower).
The motors of all other EH pumps are supplied configured for 'high-voltage' operation (380 V and higher). The one
exception to this is the Leroy 11 kW, 50 Hz motor, which is configured for 'low voltage' as this is 380-415 V.
Refer to the wiring instructions provided with the pump motor. Configure your electrical connections according to
the manufacturers instructions. If in doubt refer to
Table
20.
Refer to
Table 20
before you connect the electrical supply to the pump motor (as described in
Section
3.6.2).
Table 20
defines which figure you must refer to for the electrical connections for your pump/electrical supply.
© Edwards Limited 2007. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 27
Page 29
A301-51-880 Issue T
Figure 11 - Sight glasses
1. Shaft-seal reservoir sight-glass
*
Not fitted to EH2600/2600IND/2600C/2600
2. Shaft seal reservoir recommended oil-level
T3/2600 T160 and EH4200/4200IND/4200C/
3. Hydrokenetic drive/gearbox sight-glass
4200 T3/4200 T160 pumps
4. Hydrokenetic drive/gearbox reflector plate
5. Hydrokenetic drive/gearbox recommended
oil-level
6. Shaft-seal reflector plate
7. Direction of rotation sight-glass* (the arrow
shows the correct direction)
3.4.3
Gear-cover (all EH1200, EH2600 and EH4200 model pumps only)
Use the following procedure to fill the gear-cover on all EH1200, EH2600 and EH4200 pumps.
You must fill the gear-cover with the same oil you used to fill the hydrokinetic drive/gearbox and shaft-seal reservoir.
1. Remove the oil filler-plug on the top of the gear-cover
(Figure
2, item 7).
2. Fill the gear-cover with oil until the oil-level is at the middle of the reflector plate in the gear-cover oil-level
sight-glass
(Figure
2, item 9).
3. Refit the oil filler-plug.
Page 28
© Edwards Limited 2007. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
A301-51-880 Issue T
3.6.2
Motor connections
WARNING
On all chemical and ATEX compliant EH pumps, you must use a suitable flameproof cable-gland to
connect the electrical supply cable to the pump-motor terminal-box. If you do not, the installation
may invalidate the certification of the system if the pump is used in an ATEX system.
WARNING
You must provide suitable strain relief on the electrical supply cable. If you do not, the cable (or
wires in the cable) may become disconnected from the pump and there may a risk of injury or
death by electric shock.
WARNING
Connect the electrical supply to the motor through a contactor which has a manual reset control.
WARNING
Connect the electrical supply to the motor so that it is automatically switched off if the backing
pump stops. If you do not, the EH pump may overheat if it continues to operate when the backing
pump is stopped.
WARNING
You must be able to isolate and lock out the electrical supply from the EH pump.
CAUTION
The motor must be correctly configured and you must make the correct electrical connections for your electrical
supply. If you do not, you can damage the motor.
Connect the supply through a contactor which has overload-protection or use a controller which incorporates a
contactor.
You must use a contactor which has a manual reset control. If you do not, the EH pump could automatically restart
after an electrical overload or an electrical supply failure.
You must use a suitable multi-wire cable and a suitable cable-gland (see Step 4 below) to connect your electrical
supply to the pump motor.
Connect the motor to the electrical supply as described in the following procedure.
1. Remove the motor terminal-box cover
(Figure 1
and 2, item 1).
2. Check your electrical supply voltage and frequency. If necessary, configure the motor (that is, the terminal wires
and any links) to operate with your supply voltage: refer to the wiring instructions supplied with the pump
motor, or if in doubt the appropriate Figure specified in
Table
20.
3. Remove the plug from the cable-entry hole that you will use for the electrical supply cable. Choose the most
suitable hole for your application.
4. Fit a suitable cable-gland to the cable-entry hole. The cable-gland (and adaptor, if fitted) must provide a
protective seal to IP44 (or higher), as defined by IEC 529. Refer to
Table 19
for the cable-gland hole sizes.
5. Pass the electrical supply cable through the cable-gland.
Page 30
© Edwards Limited 2007. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
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