Nordson Encore - Iflow Module Repair; Proportional Valve Cleaning

Repair
5-8
Part 1618871−01
 2020 Nordson Corporation
iFlow Module Repair
Repair of the iFlow module is limited to:
 cleaning or replacing the proportional valve
 replacing the gun air solenoid valve
Field replacement of other parts is not possible, due to the need to calibrate
the module at the factory using equipment not available to the field.
CAUTION: The module circuit cards are electrostatic sensitive
devices (ESD). To prevent damage to the cards when handling them, wear
a grounding wrist strap connected to the controller enclosure or other
ground. Handle the cards only by their edges.
Proportional Valve Cleaning
See Figure 5-13. A dirty air supply can cause the proportional valve (8) to
malfunction. Follow these instructions to disassemble and clean the valve.
1. Disconnect the coil (11) wiring from the circuit board (3). Remove the
nut (12) and coil from the proportional valve (8).
2. Remove the two long screws (9) to remove the proportional valve from
the manifold.
CAUTION: The valve parts are very small, be careful not to lose any. Do
not mix the springs from one valve with those from another. The valves are
calibrated for different springs.
3. Remove the two short screws (10), then remove the valve stem (13)
from the valve body (16).
4. Remove the valve cartridge (15) and spring (14) from the stem.
5. Clean the cartridge seat and seals, and the orifice in the valve body.
Use low-pressure compressed air. Do not use sharp metal tools to
clean the cartridge or valve body.
6. Install the spring and then the cartridge in the stem, with the plastic seat
on the end of the cartridge facing out.
7. Make sure the O-rings furnished with the valve are in place on the
bottom of the valve body.
8. Secure the valve body to the manifold with the long screws, making sure
the arrow on the side of the body points toward the outlet fittings.
9. Install the coil over the valve stem, with the coil wiring pointing toward
the circuit board. Secure the coil with the nut.
10. Connect the coil wiring to the circuit board.