8.4 Humidifier Canister Replacement
WARNING! Risk of electric shock. Can cause equipment damage, injury or death. Open all local
and remote electric power supply disconnect switches and verify with a voltmeter that power is
off before working within any electric connection enclosures. Service and maintenance work
must be performed only by properly trained and qualified personnel and in accordance with
applicable regulations and manufacturers’ specifications. Opening or removing the covers to
any equipment may expose personnel to lethal voltages within the unit even when it is
apparently not operating and the input wiring is disconnected from the electrical source.
WARNING! Risk of humidifier canister meltdown, smoke and fire. Can cause fire suppression
system activation, fire and smoke alarm activation, equipment and building damage, injury and
death. The steam cylinder is disposable and must be replaced at the end of it’s service life. A
cylinder’s service life depends on water supply conditions and humidifier usage. Using a
humidifier canister that has reached the end of it’s service life can be extremely hazardous. If
the canister cannot be replaced immediately at the end of life condition, turn Off the power and
water supply to the humidifier and remove the canister until a replacement canister can be
installed.
CAUTION: Risk of contact with hot surfaces. Can cause injury. The refrigerant discharge lines,
are extremely hot during unit operation. Allow sufficient time for them to cool before working
within the unit cabinet. Use extreme caution and wear appropriate, OSHA-approved PPE when
working on or near hot discharge lines.
After an extended period of operation, in accordance with life-expectancy information, the cylinder is
completely used as indicated by the amber high-water sensor light illuminated on the cabinet. Then this
condition is reached, a new replacement cylinder must be installed.
NOTE: The amber high-water sensor light may come on during initial start-up, but this instance does
not indicate that the cylinder should be replaced.
The steam cylinder is disposable and must be replaced at the end of the cylinder's life. Cylinder life will
vary according to water-supply conditions and humidifier use.
Contact your local Vertiv™ representative to obtain a replacement cylinder. To obtain the correct
cylinder, supply the cylinder model from the white 3-digit label on the cylinder, or supply the model,
voltage and serial number from the unit specification label.
8.4.1 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.
Vertiv | Liebert CRV Installer/User Guide | 84
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