Figure 145 Sensor Pins, Cylinder Plugs - Emerson Liebert CRV User Manual

Remove the Old Cylinder
1. Turn Off the water supply to the 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 the cylinder is empty, push the auto On/Off/Drain switch to the Off position.
WARNING
!
Risk of electric shock. Can cause injury or death.
Open all local and remote electric power disconnect switches and verify with a voltmeter that
power is Off before completing the next step in the cylinder replacement operation.
4. The power wires to the cylinder are attached by cylinder plugs to the electrode pins on top of the
cylinder. Pull these plugs off the pins.
5. Using a slotted screwdriver, loosen the steam hose clamp(s) and pull the steam hose off.
The cylinder is now ready to be lifted out of the unit.
Installing the New Cylinder
1. Leave the main disconnect open until the cylinder is completely installed and reconnected.
2. Ensure that the cylinder mounting stubs are seated properly in the allotted side mounting slots
within the unit.
3. The white sensor plug on all units is for the sensor pin, which always goes on the single pin offset
from the others.
4. Ensure that cylinder plugs are snug on the pins.
5. Replace loose-fitting plugs; loose plugs may generate enough heat to melt and destroy the plug,
and new cylinder plugs must be ordered.
Reverse the procedure to install a new cylinder.

Figure 145 Sensor pins, cylinder plugs

Humidifier Maintenance
WARNING
!
Risk of electric shock. Can cause injury or death.
Open all local and remote electric power supply disconnect switches and verify with a
voltmeter that power is Off before performing maintenance on the humidifier. The plumbing
and electrical compartments contain high-voltage components and wiring. The access cover is
attached with screws. Access should be limited to authorized personnel only.
Extended Shutdown
Always drain the cylinder before disconnecting power to the humidifier for a period of extended
shutdown. Otherwise, the electrodes are subject to harmful corrosion, which drastically shortens the
cylinder life. Do not leave the switch in the DRAIN position indefinitely because the drain coil could
burn out. Leave the switch in the Off position and open the main external fused disconnect to stop
power to the humidifier. Close the shutoff valve in the water supply line feeding the humidifier.
® ™
Liebert CRV
White
Sensor
Plug
Cylinder Pin
1
Sensor Pin
Cylinder
Plug
Cylinder Pin
178
Humidifier—600mm (24") Units Only