Edwards nXR60i, Инструкция по эксплуатации

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2. General description
2.1 Overview
WARNING: INCORRECT USE OF EQUIPMENT
Risk of injury or damage to the equipment. Incorrect use of the equipment can cause
damage to the equipment or injury to people. The user is responsible for the safe
operation, installation and monitoring of the system.
The nXRi product family is a range of dry, multi-stage roots vacuum pumps that gives
high pumping density in a compact form. The pump is connected by a cord and is
designed for use on clean duty applications.
The cord ratings are:
Supply voltage (V)
Current (A) Frequency (Hz)
100
‑
127 14
50 or 60
200
‑
240 7
The pump is not designed for use with flammable, corrosive, toxic or other hazardous
gases. Gas or oxygen can mix in the pump system.
The dry-pumping system operates in steady-state gas load conditions. The pump can
sustain continuous operation with a maximum power consumption of 850 W. If the inlet
pressure exceeds the specified pressure, the pump controller reduces the motor speed.
The motor speed is increased when the pressure is reduced, or when the transient
overload protection has recovered. Refer to Table: Performance data on page 13 for
information on maximum inlet pressure.
Refer to
Figure: nXRi pumps on page 8, the system is supplied with either a NW40 inlet
port (1) and a NW25 exhaust port (10).
The pump mechanism is operated by a three
‑
phase electric motor. The pump controller
controls the motor.
The system is air cooled by a fan installed internally in the pump enclosure. The pump
has a thermal protection device that will stop the motor if a thermal overload, for
example in high ambient temperature occurs. You must restart the pump after the pump
is cooled down.
The pump is designed to pump the residual gases used in high vacuum systems. The
gases are:
▪ Air
▪ Nitrogen
▪ Krypton
▪ Argon
▪ Helium
You can use the pump to pump water vapour. You must use the gas ballast when water
vapour is pumped. The water vapour must not condense in the pump.
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A90301880_B - General description