SC_450 PreciseCoat Conformal Coating Jet_Rev_04.pdf - 第39页
SC-450 PreciseCoat C onformal C oating J et Maintenance and Service © 2024 Nordson Corporation 33 5.7.2 Replacing Heater Insu lation and Interconnec t PCA To replace the heater insul ation or heater interconnec t P CA (F…
SC-450 PreciseCoat Conformal Coating Jet Maintenance and Service
32 © 2024 Nordson Corporation
f. Install the fluid body assembly into the heater insulation, see 5.7.1 Removing and
Replacing the Heater Assembly, Fluid Body, and Fluid Seal.
Item Description
1 Seal Press Tool (Item 23)
2 U-Cup Seal (Items 19 and 23)
3 Assy, Fluid Body, SS (Item 16)
Figure 5-9 Seating the U-Cup Seal
To install the heater assembly (Figure 5-7):
1. Inspect heater contact pads.
> Should be clean and free of any debris or coating material.
2. Slide heater assembly onto fluid body and up to valve.
3. Install three (3) screws securing the heater assembly to the valve body assembly.
4. Torque the three (3) screws to 1.35 Nm (12 in-lbs).
5. Install the fluid needle, see 3.6 Installing the Fluid Needle.
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SC-450 PreciseCoat Conformal Coating Jet Maintenance and Service
© 2024 Nordson Corporation 33
5.7.2 Replacing Heater Insulation and Interconnect PCA
To replace the heater insulation or heater interconnect PCA (Figure 5-10):
1. Remove the heater assembly, see 5.7.1 Removing and Replacing the Heater Assembly,
Fluid Body, and Fluid Seal.
2. Rotate the SC-450 upside down and remove one (1) screw securing the heater interconnect
PCA to the heater insulation and valve body assembly.
3. Disconnect the heater control cable from the heater interconnect PCA.
4. To replace the heater interconnect PCA:
a. Keep the applicator upside down and pull the heater control cable through the service
hole on the heater insulation.
b. Connect the heater control cable to a new heater interconnect PCA.
Item Description Item Description
1 Insulation, Heater (Item 13) 3 Screw
2 Cable, Heater Control 4 PCA, Interconnect, Heater (Item 14)
Figure 5-10 Removing the Heater Insulation
To install the heater insulation (Figure 5-10):
1. Pull the heater control cable through the service hole on the heater insulation.
2. Connect the heater control cable to the heater interconnect PCA.
3. Apply Loctite 242 to the screw.
4. Install the one (1) screw securing the heater interconnect PCA and the heater insulation to
the valve body assembly.
5. Torque the screw to 1.35 Nm (12 in-lbs).
6. Inspect heater contact pads.
> Should be clean and free of any debris or coating material.
7. Install the fluid body and heater assembly, see 5.7.1 Removing and Replacing the Heater
Assembly, Fluid Body, and Fluid Seal.
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SC-450 PreciseCoat Conformal Coating Jet Maintenance and Service
34 © 2024 Nordson Corporation
5.7.3 Replacing the Solenoid Valve
The solenoid valve and associated parts are part of the cable with solenoid assembly (Item 12).
To remove the solenoid valve (Figure 5-11):
1. Remove the SC-450 from the coating system, see 5.6 Removing the SC-450.
2. Remove the heater assembly and separate the fluid body and and heater insulation from
the valve body, see 5.7.1 Removing and Replacing the Heater Assembly, Fluid Body, and
Fluid Seal.
3. Remove the four (4) screws from the junction plate.
4. Separate the junction plate and 3-way valve from the valve body assembly.
5. Remove and set aside the two (2) O-rings (Items 11 and 23).
6. Remove and set aside the O-ring (Items 10 and 23).
Item Description Item Description
1
Screw, M3 x 0.5 x 16 SHCS, SS
(part of Item 12)
4 Assy, Cable w/Solenoid (Item 12)
2 Plate, Junction (part of Item 12) 5 O-Ring, 020, Viton (Items 10 and 23)
3 O-Ring (Items 11 and 23) 6 Dowel Pins
Figure 5-11 Replacing the Solenoid Valve Assembly
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