Chapter 5 Maintenance - Waters 717plus Operator's Manual

5
Maintenance
This chapter covers 717plus maintenance. Procedures are provided for defrosting the
heater/cooler and for replacing the syringe, seal pak, and in-line filters.
5.1 Defrosting the Heater/Cooler
When to Defrost
If the Heater/Cooler fails to reach the lowest setpoint at recommended ambient conditions
(16 to 27° C and 80 percent relative humidity), defrost the heater/cooler compartment.
Note: Maintain proper ventilation space (see
Defrosting the Heater/Cooler
To defrost:
1. Press the keys outlined in the figure below
2. Open the sample compartment door. The defrost cycle takes 60 minutes.
Note: If you want to stop the defrost cycle before the programmed time expires, press
Stop Defrost.
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Section 2.1, Site Requirements).
(Figure 5-1).
Defrosting the Heater/Cooler
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