Removing The Old Canister; Mandatory Cleaning Of The Drain Valve - Liebert PX018 Installer's/User's Manual

9.4.1 Removing the Old Canister

To replace a used-up humidifier cylinder:
1. Turn Off the water supply to unit.
2. The old cylinder must be drained completely before removing. This is done by pushing the
auto On/Off/drain switch to the "Drain" position.
3. When completely drained, push the auto On/Off/Drain switch to the Off position.
4. Open the main electrical disconnect during the entire cylinder change operation.
5. The power wires to the cylinder are attached by cylinder plugs to the electrode pins on top of
the cylinder. Pull up to remove the plugs from the pins.
6. Use slotted screwdriver to loosen the steam hose clamp(s)
7. Disconnect the steam hose by pulling it straight up.
8. Loosen the reversible cylinder zip tie.
The cylinder is now ready to be lifted out of the unit.

9.4.2 Mandatory Cleaning of the Drain Valve

Always clean the drain valve before installing a new cylinder. Figure 9.11 on the next page shows an
exploded view of the drain valve for reference to clean it.
1. Remove old cylinder as described in
2. Note that the ring terminal for the drain-valve green ground wire is sandwiched between the
drain valve and the drain pan.
3. Remove the two screws securing the drain valve body to the drain pan.
4. Remove the hose clip and hose connection from the drain-valve body.
5. The drain-valve assembly is now free for disassembly and cleaning.
6. At a sink, remove the snap-fit red cap from the coil assembly and slide the coil off the actuator.
7. Loosen actuator using a wrench and unscrew from the plastic body.
8. Clean the exposed core, spring and plastic drain-valve pot
9. Reinstall in the reverse order.
NOTE: Be cautious when putting the spring back into the plunger, the taper end of the spring must be
installed toward the solenoid.
10. Hand-tighten the actuator back into place, then secure it using a wrench to turn it a quarter of
a turn.
11. Clean out the end of the hose, then reconnect it to the drain-valve body with the clamp.
12. Fit mounting screws back through the drain-valve body, one through ring terminal on the
green wire.
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Removing the Old Canister above.
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