The On-Board IS-1000 compresses and circulates helium in the closed-loop refrigeration system used by On-Board IS cryopumps. It is offered in low- and high-voltage configurations with intelligent system monitoring and network communication through the On-Board IS Controller. IS-1000 is a model designation rather than a complete configured-unit number; voltage, gauge, caster, connector, and control-module options must be established from the full manufacturer part number or nameplate
Configurations vary. Verify the exact unit before choosing a replacement.
Application classIndustrial automation and process equipment
CategoryVacuum and Cryogenics
Specifications
Identification
Manufacturer product line
CTI-Cryogenics On-Board IS
Model
IS-1000
System
Function
Compresses and recirculates helium for On-Board IS cryopump refrigeration
Refrigeration circuit
Closed-loop helium expansion system
Compressor construction
Oil-lubricated commercial compressor with multiple oil-removal stages and a replaceable final adsorber
Cooling
Cooling method
Facility water cooling
Water inlet temperature
50–90 °F (10–32 °C)
Water flow
2.75 ±1.25 gpm (10.4 ±4.7 L/min); additional flow requirements apply to high-voltage operation below 375 V at 60 Hz
Maximum water inlet pressure
100 psi (6.9 bar)
Water connections
1/2-inch female pipe thread at both inlet and outlet
Water pH
6.0–8.0
Calcium carbonate
Less than 75 ppm
Deionized-water limitation
Do not use water above 100,000 ohm-cm resistivity
Electrical
Nominal supply options
Low voltage: 200–230 VAC; high voltage: 380–480 VAC
Permitted supply ranges
Low voltage: 180–253 VAC; high voltage: 342–528 VAC
Phase and frequency
Three-phase, 50/60 Hz
Nominal input power
5.8 kW for either voltage configuration
Full-load / locked-rotor current
Low voltage: 19/85 A; high voltage: 10/42 A
Minimum electrical service
Low voltage: 30 A; high voltage: 20 A
Customer-supplied power cable
600 VAC, 10 AWG, three copper conductors plus ground; installation must comply with applicable electrical codes
Helium
Supply connection
1/2-inch Aeroquip self-sealing coupling with male thread
Return connection
1/2-inch Aeroquip self-sealing coupling with female thread
Charging gas
99.999% pure helium through an SAE 45-degree flare fitting
Controls
System communication
Compressor control module communicates with the On-Board IS Controller over channel C of the Intercomponent Network
Remote emergency-off interface
Two-pin EMO remote connector; its mating plug must remain installed when remote EMO is not used
Environment
Ambient operating temperature
50–100 °F (10–38 °C)
Mechanical
Unit weight
Low voltage: 210 lb (95 kg); high voltage: 222 lb (102 kg)
Service
Adsorber replacement interval
Every three years
User-serviceable component
Adsorber only
Operation
Duty
Continuous operation; the compressor remains on while connected cryopumps regenerate
Documented IS-1000 Configured Variants
The current Edwards catalog assigns separate part numbers to electrical and mechanical configurations. IS-1000 alone does not select one of these units.
Edwards part number
Catalog description
Documented distinction
8135983G001
IS-1000, LV compressor
Low-voltage configuration
8135983G002
IS-1000, LV compressor, kPa gauge
Low-voltage configuration with kPa pressure gauge
8135984G001
IS-1000, HV compressor, water-cooled, three-phase, 380/480 V
High-voltage configuration
8135988G001
IS-1000 HV compressor with module and DB-15 connector
Capacity depends on the attached cryopump models and system design; a universal pump-count limit should not be inferred from the model name.
Supported applicationsNew and existing On-Board IS cryopump systems
IS-8F capacityThe current Edwards compressor page states support for up to six On-Board IS-8F cryopumps.
General capacity statementThe 2021 Edwards data sheet describes one IS-1000 supporting up to five On-Board IS cryopumps generically. Use application-specific Edwards guidance when selecting a mixed or non-IS-8F system.
Helium Charge Reference
These pressures apply with the complete connected system off, all components acclimated to 60–80 °F (15.5–26.6 °C), and the applicable line frequency established.
Line frequency
System helium pressure while off
60 Hz
340–350 psig (23.4–24.1 bar)
50 Hz
355–365 psig (24.5–25.2 bar)
IS-1000 Seismic Mount Kit
Edwards offers a dedicated kit for securing the compressor against movement and overturning during a seismic event.
Kit part number8187012K001
Installation guide8040704, Revision A
Kit contentsTwo 8186348P001 seismic-mount brackets and four 7000118P001 stainless-steel 1/4-20 × 0.75-inch button-head screws
