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Inlet Valve Replacement
WARNING
Disconnect main power source before accessing
internal compartments.
The inside of the humidifier cabinet contains high
voltage components and wiring. Access should be
limited to authorized personnel.
1. Drain the cylinder by pressing the Power/Drain
button on the front of the humidifier for 1 second.
Let the humidifier drain until no more water is
flowing out to drain (usually not more than
10 minutes). Following the drain cycle, the
humidifier will switch off.
2. Close the supply water shut off valve.
3. Turn off power to the humidifier with the external
disconnect.
4. Using a flat screwdriver, turn the lock on the
humidifier's front cover 90° counterclockwise to
release. Rotate the base of the cover outwards
6 inches, then lift upwards to remove.
5. Disconnect the wiring to the solenoid. See Fig. 32
6. Remove quick connect fitting from inlet valve.
7. Grip the inlet valve and pull forward as far as
possible.
8. Inside the humidifier, bend the hose attached to the
inlet valve up as shown in Fig. 33
9. Using pliers, move the clamp up the hose away from
the valve to release its hold. Slide the hose off the
valve. Some remaining water in the hose will spill
out. Have a cloth on hand to absorb the water.
10. Follow the above steps in reverse to install the new
inlet valve.
11. Replace the humidifier front cover, and turn the
locking screw 90° clockwise to secure it.
12. Turn on the mains power to the unit at the discon-
nect switch.
13. Press the Power/Drain button for 1 second. The
humidifier will perform a short self-diagnostic
sequence before resuming normal operation
14. Check connections for leaks.
1. DISCONNECT
SOLENOID
WIRING
INLET VALVE
2. REMOVE
QUICK
CONNECT
Fig. 32. Inlet valve replacement.
1. BEND HOSE
23
HM750A1000
3. SLIDE FORWARD
4. LIFT UP
MCR37230
2. USE PLIERS
TO MOVE CLAMP
MCR37231
Fig. 33.
33-00289—01
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