S149-01-880 Issue F
Page 14
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Edwards and the Edwards logo are trademarks of Edwards Limited.
Installation
3.2
System design considerations
Consider the following points when designing the pumping system:
z
Use a suitable valve to isolate the pump from the vacuum system if there is a need for the pump to warm up
before pumping condensable vapors, or to provide additional system protection when the pump is switched
off.
z
Avoid high levels of heat input to the pump from the process gases, otherwise the pump may overheat and
seize.
z
If the pump is used in a high ambient temperature and has a high gas throughput, the temperature of the
pump body may exceed 70 °C (158 °F) and must be fitted with suitable guards to prevent contact with hot
surfaces.
z
Ensure that the exhaust pipeline cannot become blocked. If an exhaust isolation valve has been installed,
ensure that the pump cannot be operated with the valve closed.
z
Provide for a purge of inert gas when the pumping system is shutdown to dilute dangerous gases to safe
concentrations.
3.3
Unpack and inspect
Remove all packing materials, remove the pump from its packing box, remove the protective covers from the inlet
and exhaust ports and inspect the pump. If the pump is damaged, notify the supplier and carrier in writing within
three days; state the item number of the pump together with the order number and supplier's invoice number. Retain
all packing materials for inspection. Do not use the pump if damaged.
If the pump is not used immediately, replace the protective covers. Store the pump in suitable conditions as
described in
Section 6
of this manual.
3.4
Locate the pump
Locate the pump close to the equipment being evacuated so that the vacuum, water and exhaust connections can
be conveniently made without creating a hazard to personnel safety. Provide adequate space around the pump for
servicing and maintenance.
Mount the pump on a rigid foundation, such as a concrete floor, and level with shims or by grouting. Mount the pump
to the foundation ensuring not to put strain or twist in the pump housing. See Figures
6
,
7
and
8
for foundation
mounting dimensions. The pump should be mounted to the floor using the four (4) pre-drilled mounting holes in the
pump base.
Remove the protective caps/covers from the inlet and exhaust flanges just prior to installing piping. If the pump is
to be used in temperatures below freezing, drain the water jacket to prevent cracking the housing; blow out the
water jacket. If the unit will be stored for a period of time before commissioning, follow the same procedure.
WARNING
When positioning the pump use suitable lifting equipment to prevent injury to personnel. Ensure
that the system is not lifted by the motor eye-bolt, as the motor eye-bolt is not intended to lift the
suspended weight of the system. Injury to personnel and/or damage to equipment can result. Refer
to
Section 2
for pump mass information.
WARNING
Use suitable lifting equipment to move the pump. Refer to
Section 2
for pump mass information.
