Thermo Scientific Thermo Scientific 3906, Operating Manual

Page: 88 / 104

| Service
13-4
|
Model 3900 Series Thermo Scientific
Chapter 13
Clean/Adjust Steam Generator
Depending upon the quality of water used in the humidification system, it may be
necessary to clean the humidity steam generator (P/N 1900190)
more frequently
than once a year .
Materials Required:
6-foot stepladder
Flat and Phillips screwdrivers
11/32 Nutdriver or wrench
Laboratory disinfectant
9/16 Open end wrench
1/2 Open end wrench
Sponge & cleaning materials
1. Remove all contents from the environmental chamber, turn it off, and disconnect
from power source.
2. Turn off the valve supplying the sterile distilled water.
3. From the stepladder, remove the eight screws securing the top of the environmental
chamber cabinet.
4. When the steam generator has cooled, remove the four thumbscrews and wingnuts
(Figure 13-3).
Figure 13-3
Access to Steam Generator
De-energize all potential sources of energy to this unit and lockout/tagout their
controls.
water inlet
wingnuts
float wires
wingnuts
water
inlet
float
wires