Thermo Scientific 3911, Operating Manual

Page: 61 / 76

Forma Model 3900 Series | 13-5
Service |
Chapter 13
5. Disconnect water inlet from steam generator.
6.
Lift the top off the steam generator and set it aside.
7. Remove the gasket and inspect for damage or excessive wear. Replace if necessary.
8.
Loosen the four nuts holding the front cover and remove it. Mark the top of heater
location for future reference. Unsnap the two toggle clamps on the heater.
9.
Remove the can through the top of the steam generator, taking care not to spill water
out of the can. Empty the water. Clean the can with a good quality laboratory
detergent and disinfectant. Do not use any type of chloride cleaner. A bristle brush
may be needed for stubborn rust and scale. Also clean the inside of the steam tube
using a test tube brush. Repeat cleaning with soap and water as necessary.
10.
Reassemb
e in reverse order being sure to align the heater with the reference mark.
Center the can within the housing and the gasket with the can opening.
CO
2
Controller Calibration
If it should become necessary, calibrate the CO
2
controller.
Start from the standard operating display (setpoint in bottom display, actual CO
2
reading in the upper display).
Figure 13-4
Key Locations
The internal temperature of the steam generator is hot enough to boil water.
Make certain, sufficient time is allowed for the unit to completely cool before
removing the top.
Infinity Key
Silence Key
Advance Key