1.3 The iH system
The iH system operates at pressures between atmospheric and ultimate vacuum with no
lubricating or sealing fluid in the pumping chamber(s). This ensures a clean pumping system
without back-migration of oil into the system being evacuated.
The iH80 system has an HCDP80 dry pump; the iH600 system has an HCDP80 dry pump,
with an HCMB600 mechanical booster pump fitted to the inlet of the HCDP80 pump; the
iH1000 system has an HCDP80 dry pump, with an HCMB1000 mechanical booster pump
fitted to the inlet of the HCDP80 pump. The HCDP80 pump is referred to as the HCDP
pump and the HCMB600 and HCMB1000 pumps are referred to as the HCMB pumps
throughout the remainder of this manual.
Both the HCDP and HCMB pumps have enclosed, water-cooled motors. The iH system is
therefore suitable for applications in clean environments where fan cooling of motors is
unacceptable.
The iH system has a gas system which introduces purge gas into the HCDP pump. This gas
system is suitable for use on harsh duty processes. If you use the iH system on light or
medium duty processes, you can use the economiser gas mode to reduce the consumption of
purge nitrogen by the pumping system.
You can manually control the iH system through the Pump Display Terminal: see
Section 1.13. Alternatively, you can use your process tool or other control equipment to
control the operation of the iH system through an Interface Module accessory (refer to
Section 8.5.3), or through an iM Communications Module accessory (see Section 8.5.2), or you
can use the iH Single Equipment Monitor accessory to control the operation of the iH system
(refer to Section 8.5.4). The remainder of this manual describes the use of the Pump Display
Terminal to operate the iH system: for use of another accessory to operate the iH system, refer
to the instruction manual supplied with the accessory.
1.3.1 iH-F variants
All iH-F variants include an innovative Breach Sensor that reduces the risk of hazardous gas
leaks during run 'til crash. The iH-F Breach Sensor alerts the user, via the Pump Display
Terminal (PDT) and Fabworks, if installed, with the words `Warning 7801 - O Ring’
indicating that the pump requires attention. Please refer to table of warnings in Section 6 for
further details.
WARNING
The iHF Breach Sensor is not a safety device.
Failure to use normal control measures in the event of a leak could result in
injury to people and damage to equipment.
The components of the iH system are described in the following sections.
1-4 iH Dry Pumping Systems
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