Environment Control Unit - Honeywell Precision Platform 4022 Series System Manual

Precision Platform 4022 Scanner

5.5.3. Environment Control Unit

5-24
Each Environment Control Unit (ECU) includes heating elements, a coolant
control solenoid valve, three thermistors, and three temperature controllers.
These ECU components participate in controlling internal head
temperature. The specific temperatures controlled are:
• Internal head temperature and, therefore, inboard sensor
temperature.
• Temperature of the air blown into the gap between the heads to
prevent condensation and dust from collecting on the sensor
windows and to help keep the sheet guides warm, preventing
condensation from forming on them and the sensor windows.
Note: Not applicable on the 4022-40 Wire Calender Scanner.
• Sheet guide heaters (on/off only)
Figure 5-12 shows the ECU and its component parts.
Precision Platform 4022 Series Scanner Components
10/4/07 p/n: 6510020208