Specifications

DRI-STEEM CRUV Electric Humidifier Installation, Operation, and Maintenance Manual • Page 35
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 identifies any burned out heaters. Only
qualified 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
– Airflow proving switch
– Low water level probe. Pull out probe plug; fill valve
should energize.
2. Seasonally (or as required, depending on water quality)
Clean the evaporating chamber:
• If the tank is hot, cool it down first. See “Cool down
humidifier” on previous page.
• Shut off the water supply.
• Allow the tank to drain completely.
• Shut off the electrical supply.
• Disconnect the fill line at the supply side of the fill valve.
• Disconnect the electrical plugs between the tank components
and the back of the electrical panel (includes: power plug, fill
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 flange, 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 flat
instrument.
• Clean and inspect probe rod assembly:
– Unplug the probe plug assembly, and leave ground wire
connected to tank.
– Unscrew probe rod assembly, and clean plastic probe
housing, ensuring that all passageways are clear.
– Clean probe rods using steel wool or similar mild abrasive
material.
– Inspect composite plastic probe housing. If any signs of
cracking, roughness, or deterioration, replace assembly.
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WARNING
Electric shock hazard
Do not remove humidifier 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 fire.
Only qualified electrical personnel should
perform maintenance procedures.
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