What is the recommended temperature for the condensing water and what would the specification be for a suitable chiller?

Water from the cold tap is generally sufficient for this unit. If the tap water starts to creep above 30-35┬░C you may see decreased performance. If you do need to use a chiller it needs to be able to circulate the water at a rate of 50-60 gph.

Does it need a vacuum pump?

Yes, if you are going to use this unit to distill samples for cyanide, a vacuum pump is required. If you wish to use it for ammonia and phenol, no vacuum source is needed. An acceptable vacuum source is item G3050.

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