PatternPro Variable Pitch Guns.pdf - 第42页
38 P/N 1048257_03 2018 Nordson Corporation PatternPro Edition 02/18 5. Remove the applicator body cover, by loosening and removing the Allen head screws. 6 5 4 3 2 1 7 8 Fig. 12 Replacing the RTD or Heater 1 Applicator…
37
P/N 1048257_03
2018 Nordson Corporation
PatternPro
Edition 02/18
Repair
Refer to these repair procedures as needed. For repair procedures not
included in this section, refer to the instructions supplied with the
replacement part.
Replacing a RTD or Heater
Resistance temperature detectors (RTD) are hardwired through the
applicator cordset. If an RTD fails, the entire applicator cordset should be
replaced. Heaters are located inside the applicator body and can be replaced
individually without replacing the entire cordset.
The following procedure describes the replacement of an RTD and heater.
1. De‐energize the system and disable the applicator. Refer to Safety.
2. Unplug the applicator cordset from the hose.
3. (Optional) Relieve system hydraulic pressure. Refer to Safety.
4. (Optional) Using two wrenches, disconnect the hose from the applicator.
NOTE: Steps 3 and 4 are not necessary if the applicator is easily
accessible and can be serviced without the need to disconnect the hose.
See Figure 12.
38
P/N 1048257_03
2018 Nordson Corporation
PatternPro
Edition 02/18
5. Remove the applicator body cover, by loosening and removing the Allen
head screws.
6
5
4
3
2
1
7
8
Fig. 12 Replacing the RTD or Heater
1 Applicator body
2 Heater
3 Ground lead
4 Terminal block
5 Cordset
6 Allen head screws
7 Applicator body cover
8 RTD block
6. Disconnect the cordset leads from the terminal block. If the heater is
being replaced, disconnect the heater leads from terminal block.
7. Remove the RTD and heater:
39
P/N 1048257_03
2018 Nordson Corporation
PatternPro
Edition 02/18
Replacing a RTD or Heater (contd)
To replace the RTD
a. Disconnect the ground lead from the applicator body and remove the
cordset.
b. Install a new cordset and insert the RTD in the applicator body by
tightening the screws.
c. Reconnect the ground lead to the applicator body.
To replace the heater
a. If necessary, trim the leads of the new heater to match the leads of
the old heater.
b. Insert the heater in the applicator body.
c. Insert each heater lead into the terminal block and tighten the terminal
block screws.
d. Insert the heater leads from the cordset into the terminal block and
tighten the terminal block screws.
8. Check the internal applicator wiring for signs of damage and the terminal
block connections for tightness.
9. Reinstall the applicator body cover, by reinstalling and tightening the four
Allen head screws.
10. If the hose was removed earlier, use two wrenches to connect the hose to
the applicator.
11. Plug the applicator cordset into the hose.
12. Restore the system to normal operation.