Air Controls - Graco InvisiPac Tank-Free HM25 Instructions - Parts Manual

Air Controls

Replace Air Control Solenoids
FF
F . 47
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NOTE: In order to replace the air control solenoids, the
system must be tipped back to access underneath the
electrical enclosure.
Disassembly (see F . 47):
IG
1. Turn main power switch OFF.
2. Close the bleed-type ball valve installed at the sys-
tem air inlet to relieve all air pressure in the system.
3. Remove front access panel (10) from electrical
enclosure (1).
4. Use 3/8 in. socket to remove two screws (8).
5. Note location of each air line connection.
6. Insert hands through access holes (FF), see F
47, in bottom of electrical enclosure then disconnect
air lines from air control solenoids (402).
7. Disconnect air control solenoids cable from MZLP
daughter board connector J13. Pull wire out of the
electrical enclosure.
8. Remove two screws (405) securing solenoids (402)
to air control assembly (9) then remove air control
solenoids.
3A2347ZAA
8
405
9
402
1
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Reassembly (see F
1. Use two screws (405) to secure new
solenoids (402) to air control assembly (409).
2. Feed the new solenoid cable into the electrical
enclosure and attach cable to MZLP daughter board
connector J13.
3. Insert hands through access holes (FF), see F
47, in bottom of electrical enclosure then connect air
lines to air control solenoids (402).
4. Slide air control assembly (9) into place then use
two screws (8) to secure to electrical enclosure (1).
5. Install electrical enclosure front access door.
Replace Air Control Gauge
F . 48
IG
Disassembly (see F
1. Turn main power switch OFF.
2. Close the bleed-type ball valve installed at the sys-
.
tem air inlet to relieve all air pressure in the system.
3. Remove two screws (8) then slide air control
assembly (9) out from electrical enclosure (1) so the
back of the gauges are exposed.
4. Remove two nuts (403a) securing gauge (403) in
place then remove bracket (403c).
5. Place one small crescent wrench on the brass part
of the gauge then use a second small crescent
wrench to remove the air fitting (403b).
. 47):
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8
403b
403a
403c
402
. 48):
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Repair
.
IG
403
9
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