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CRUV INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
MAINTENANCE
Tap/softened water
INSPECTION AND MAINTENANCE
1.
Annually
(also recommended when maintenance is performed)
• Inspect tank and gaskets for leaks.
• Measure current draw of heaters and verify amp values per stage by
comparing to the wiring diagram located inside the subpanel cover. This
identifi es any burned out heaters. Only qualifi ed electrical personnel
should perform this task.
• All safety devices in the control circuit should be cycled on and off to
verify they are functioning. These include:
– High limit switch
– Airfl ow proving switch
– Low water level probe. Pull out probe plug; fi ll valve should energize.
2.
Seasonally
(or as required, depending on water quality)
Clean the evaporating chamber:
• If the tank is hot, cool it down fi rst. See “Cool down humidifi er” on
previous page.
• Shut off the water supply.
• Allow the tank to drain completely.
• Shut off the electrical supply.
• Disconnect the fi ll line at the supply side of the fi ll valve.
• Disconnect the electrical plugs between the tank components and the
back of the electrical panel (includes: power plug, fi ll plug, drain plug,
water level control plug, tank temperature sensor plug, and thermal trip
plug).
Important:
Disconnect by pulling on plug housing. Do not disconnect
by pulling on cord or wires.
– Disconnect the drain union on the back left corner of the frame.
– Disconnect the steam supply hose from the top of the tank.
– Lift the tank foot above the frame fl ange, and slide the tank assembly
forward to remove.
• Loosen the four cover bolts and remove the cover assembly from the
tank.
• Clean the tank interior using a putty knife or similar fl at instrument.
WARNING
Electric shock hazard
Do not remove humidifi er electrical
panel cover, heater terminal cover, or
subpanel access panels until electrical
power is disconnected. Improper wiring
or contact with energized circuits
can cause property damage, severe
personal injury, or death as a result of
electric shock and/or fi re.
Only qualifi ed electrical personnel
should perform maintenance
procedures.
mc_060310_0840
