54
CAUTION
TO PREVENT ELECTRICAL SHOCK, ALWAYS DISCONNECT CONCENTRATOR FROM
ELECTRICAL OUTLET BEFORE SERVICING.
4-WAY VALVE
PROCEDURE 16
4
-
W
A
Y
V
A
L
V
E
Replacing 4-way Valve (FIGURE 1)
1. Unplug unit.
2. Remove cabinet (Refer to PROCEDURE 1 - REMOVING CABINET).
3. Remove control panel (Refer to PROCEDURE 9 - REMOVING CONTROL PANEL).
4. Remove the four (4) mounting screws that secure the 4-way valve to the manifold assembly.
5. Position NEW 4-way valve onto manifold assembly and loosely install mounting screws through 4-way
valve and into manifold assembly.
PROCEDURE 16 - REPLACING 4-WAY VALVE/MANIFOLD ASSEMBLY/PILOT VALVES
CAUTION
Torque sequence and specification MUST BE adhered to or possible damage to the 4-way valve
could result.
6. Tighten mounting screws in the sequence described below (FIGURE 1).
7. Pre-torque the mounting screws to 10 + 2 in. lbs. using the torque sequence.
8. The mounting screws can be now be torqued to 27 + 3-in. lbs. in the same sequence.
STOP!
THIS IS A MAINTENANCE FREE VALVE. OPENING THE VALVE WILL
VOID ANY AND ALL WARRANTIES APPLICABLE TO THE VALVE.
4-way Valve Face
Replacing 4-way Valve Manifold Assembly (FIGURE 2)
1. Unplug unit.
2. Remove cabinet (Refer to PROCEDURE 1 - REMOVING CABINET).
3. Remove control panel (Refer to PROCEDURE 9 - REMOVING CONTROL PANEL).
4. Remove the ty-wraps from the sieve bed hoses to top of manifold assembly.
5. Remove hoses from manifold assembly.
6. Remove and code the four (4) spade connectors - two (2) each from the two (2) valve pilots on top of
the manifold assembly.
7. Remove the mounting screw(s) that secures muffler canister assembly to rear of sound box
(Refer to PROCEDURE 2 - PREVENTIVE MAINTENANCE).
8. Remove muffler from muffler canister.
9. Loosen the adjustable clamp that secures valve manifold input hose to front of heat exchanger.
10. Remove hose from front of heat exchanger.
Manifold Assembly
4-way Valve
MOUNTING SCREW TORQUE SEQUENCE
Pre-torque to 10 + 2-in. lbs., then Torque
to 27 + 3-in. lbs.
Mounting
Screws
FIGURE 1 - REPLACING 4-WAY VALVE
Summary of Contents for 3LX
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