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Repair
User Interface/Control Box
Remove Shroud and Front Panel of Control
Box
1. Close main air shutoff valve on air supply line and
on system. Depressurize air line.
2. Disconnect power.
3. Remove four nuts (21) and then remove front and
rear shrouds (19, 20).
21
20
19
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4. Remove four nuts (17); leave two nuts on left side of
panel tight. Open front panel of control box (16).
14
Replace Single Solenoid Module
1. Remove Shroud and Front Panel of Control Box,
see page 14.
2. Disconnect solenoid cable connector (542) from the
solenoid (509a) being replaced. See Electrical
Schematics if necessary. See Sensors Schematic
Control Box on page 33.
3. Remove two screws (509b) from the solenoid being
replaced then remove solenoid (509a). See F
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4. Use screws (509b) to install new solenoid (509a).
5. Reconnect solenoid cable connectors (542).
NOTE: From left to right, solenoid functions are as
follows:
-
17
-
-
16
-
DVA
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DVB
Dosing valve A (DVA) (normally open)
Dosing valve B (DVB) (normally open)
Pump A (PA) (normally closed)
Pump B (PA) (normally closed)
PA
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PB
. 4.
IG
509b
509a
3A8047B
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