Plc Interface Accessory Kit Service; Valve Assembly Bank; Pressure Switch Assembly Replacement - Graco Uni-Drum Instructions Manual

PLC Interface Accessory Kit Service

PLC Interface Accessory Kit Service

Valve Assembly Bank

All electrical wiring must be done by a qualified
electrician and comply with all local codes and
regulations.
Installing and servicing this equipment requires
access to parts which could cause an electric shock
or other serious injury. Have only qualified electricians
access the control assembly.
Remove the valve assembly bank that is mounted below
the Junction Box Panel (H) as follows:
NOTE: The valve assembly bank has two solenoids
(SOL139 and SOL147) that are used as switches to
control Pump operation. SOL139 depressurizes the
Pumps. If the output is high (open), Pumps will
depressurize. SOL147 turns air on to the Pumps.
1. Shut off power to the Junction Box Panel (H).
Valve Assembly Removal
2. Remove the cover off the Junction Box Panel (H).
3. Locate the valve assembly (203) that is attached to the
mounting plate (201) below the Junction Box Panel
(217). See F . 21.
IG
4. Disconnect the two cables (216) from the terminal strip
inside the Junction Box Panel (217) for the valve
assembly (203) bank. For wiring information, refer to
the Electrical Diagram on page 91.
5. Remove four cap screws (205), the lock washers
(206), and the valve assembly (203) from the
mounting plate (201).
Valve Assembly Replacement
6. Install the new valve assembly (203) on the mounting
plate (201) using the four cap screws (205) and lock
washers (206). See F
7. Reconnect the two cables (216) on the terminal strip
inside the Junction Box Panel (217) for the valve
assembly (203) bank. For wiring information, refer to
the Electrical Diagram on page 91.
42
. 21.
IG
8. Reinstall the cover on the Junction Box Panel (H).
9. Reapply power to the Junction Box Panel (H).
10. Perform the Daily System Startup procedure on
page 33 at the applicable Supply Unit (LH or RH).
11. Verify that the valve assembly (203) bank operates
correctly.
12. Return the system to previous operation settings.
Pressure Switch Assembly
Replacement
All electrical wiring must be done by a qualified
electrician and comply with all local codes and
regulations.
Installing and servicing this equipment requires
access to parts which could cause an electric shock
or other serious injury. Have only qualified electricians
access the control assembly.
Remove the pressure switch assembly that is mounted
below the Junction Box Panel (H) as follows:
NOTE: The pressure switch (PS108) turns air pressure
on the system.
1. Shut off power to the Junction Box Panel (H).
Switch Removal
2. Remove the cover from the Junction Box Panel (H).
3. Locate the pressure switch assembly (202) that is
attached to the mounting plate (201) below the
Junction Box Panel (217). See F
4. Disconnect the 5-pin cord (211) from the pressure
switch assembly (202). For wiring information, refer to
the Electrical Diagram on page 91.
5. Disconnect the end of the lead wire from the pressure
switch assembly (202). Leave the other end of the
lead wire connected to the valve assembly bank (203).
. 19.
IG
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