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PURE Humidifier Co. “ECDDR” Maintenance Instructions
The “ECDDR” Series Electric Humidifier is practically maintenance
-
free. However, the humidifier should
be inspected and placed on a dedicated maintenance schedule to ensure continued operation of the
humidifier and its accessories.
PURE Humidifier Co. recommends that the following items be in-
spected, and/or, cleaned on a minimum basis of twice a year.
If excessive mineral buildup occurs,
the maintenance schedule should be increased.
Inspect/Maintenance Item
Water makeup float valve
Low water float switch
Safety interlocks
(air flow, high
-
limit)
Immersion heaters
Humidifier cover/tank
Flexible hose
Procedure to Follow
Check to make sure the fill valve is operating
properly. If the valve appears to continually fill,
check the valve adjustment or valve seat and seal
(see Troubleshooting instructions).
Check to make sure the switch will shut the
humidifier off when the water level drops too low.
Open the drain valve to allow water to drain out for
checking purposes. Make sure to reset the drain
valve after inspection is completed.
Check to make sure the safety interlocks (airflow,
high
-
limit, etc.) will shut down the humidifier.
Verify the correct amperage is being drawn by the
heating element. Reference the wiring diagram
for correct amperage.
Inspect for any leaks. Repair as required.
Remove the heater assembly and remove mineral
deposits from floor of the humidifier reservoir. If
excessive mineral buildup is found, the cover may
need to be removed to facilitate complete cleaning
of the humidifier.
Inspect for cracks or leaks. It is normal for the
hose to become hard and develop a “set”.
Maintenance & Cleaning Instructions
Cleaning Instructions
All humidifier tanks should be cleaned manually from the reservoir cover. Turn off the water supply,
disconnect controls by unplugging the molex in the small octagon box, disconnect power wire from
contactor and remove conduit connection from cabinet, disconnect all the hose connections from the
tank and slide the tank out of the cabinet. Remove all loose solids with a wet vacuum, stainless steel
brush, scouring pad, putty knife and/or bucket. Heaters should also be cleaned and loose buildup
removed by hand (if applicable). After removal of solids and replacing the cover you may wish to add
a de
-
scaling solution. DO NOT use Hydrochloric acid
-
based de
-
scalers; this will corrode stainless
steel. PURE Humidifier Co. recommends the use of a vinegar, citric acid, diluted phosphoric acid or
diluted nitric acid
-
based cleaner. Follow all precautions on the cleaner packaging. Some cleaners will
give off overwhelming and noxious odors, so make sure there is proper ventilation in the working area
and the steam outlet pipe is removed so that fumes are not spread throughout the building. After
cleaning the tank, flush the tank multiple times to remove any remaining acid. Drain tank completely
and allow the tank to air dry for a few hours. This will ensure that the outer protective layer of the
stainless steel will passivate and ensure corrosion resistance
.
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