Replacing The Recorder; Re-Zeroing The Recording Thermometer; Figure 7.20 Electronic Partlow Temperature Recorder - Carrier 69NT40-561-019 Operation And Service Manual

7.20.1

Replacing the Recorder

a. Turn power to the unit OFF.
b. Open the recorder door (item 1, see
c. Locate the connector below the recorder (item 6), and squeeze the ears together to disconnect the plug.
d. Remove the four mounting screws (item 8), and remove the recorder.
e. Install the new recorder by reversing the above steps.
7.20.2

Re-zeroing the Recording Thermometer

For Electronic Partlow Recorder CTD part number 12-00464-xx
Use chart CTD: part number 09-00128-00 (F), part number 09-00128-01 (C).
a. Press the "Calibration" button (item 7,
down scale, then move upscale to the chart ring at -29°C (-20°F), and stop.
T-359
Figure

Figure 7.20 Electronic Partlow Temperature Recorder

2
1
10
9
8
7
1. Recorder Door
2. Change Chart Button
3. Recorder Box
4. Pen Tip
5. Stylus Arm
Where xx= an odd number (example: 12-00464-03)
Figure
7.20).
3
4
5
6
6. Connector
7. Calibration Button (Located underneath)
8. Mounting Screws, #10-24 x 7/16 inches long
9. Hold Down Tab
10. Chart Retaining Nut
NOTE
7.20) on the bottom of the recorder. The pen tip will drive fully
7–34