This is an Edwards CTI-Cryogenics gas heater for CTI/Edwards Cryopumps, used to heat purge gas and reduce regeneration time. Warm-up time can be reduced by purging the cryopump with warm dry argon or nitrogen gas. Using the gas heater, CTI P/N: 8080250K020, will reduce warm-up time about 50 percent, and will maintain the gas temperature below the 150°F (66°C) limit. (For complete instructions see the user's manual on the "Downloads" section, page 24)