Emerson Liebert CRV 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 C R 0 2 0 R A 1 C 7 S D 1 8 1 1 E L 1 0 P A - Manual (Page 126)

Humidifier
Liebert ® CRV ™ 118
A.1.3 Humidifier Startup and Operation
• Ambient temperature location for humidifier: 41 - 104 ° F (5 - 40 ° C).
• Relative humidity location for humidifiers: 5 - 80% RH.
Check to see that the unit is securely mounted on a level surface with the proper drain and water
supply. Check for correct voltage with appropriately sized service. Check that the steam distributor,
steam supply hose and condensate line are correctly installed and routed back to the unit.
Check all electrical connections for wires that may have become loose in shipping. Components
damaged because of loose connections are NOT under warranty.
Check electrode plugs to ensure they are pressed firmly onto the electrode pins. Important: Loose
connections will cause overheating of the cylinder plugs, possibly melting the plugs and/or cylinder.
1. Open the isolating valve in the feed water line to the unit.
2. Make sure the Liebert iCOM
® is set high enough to call for humidification.
3. Turn on the main disconnect in the primary service feeding the unit and check that unit has
power at the primary terminal block.
4. Push the auto On/Off/Drain Switch to “On.”
Water will start to enter the cylinder through its bottom port and rise in the cylinder to a point
determined by the solid state control circuitry. It is not unusual upon initial startup for the water to
fill the cylinder and cycle on the red high-water sensor light.
The red light simply acts as a safety to shut off the fill valve and prevent overfilling. With the red
light on, the water in the cylinder will continue to heat and, after a few minutes, start to boil. After
the boiling of the water has lowered the water level below the sensor at the top of the cylinder, the red
light will go out and the fill solenoid will again open until the cylinder is again full. This cycling of the
red light and fill valve will continue until the unit's full output capacity is reached, after which the
water level will automatically lower itself in the cylinder. (The increased concentration allows for
lower electrode coverage while maintaining the same output.) When a stabilized condition is reached,
the water will be boiling close to the cylinder seam level. The solid state circuitry will maintain the
proper concentration in the cylinder by introducing short drains only when necessary. If the cylinder
is manually drained, the above process will repeat itself.
A.1.4 Low Water Conductivity
Should normalization of the unit be required immediately after startup, the installer may speed up
the process by artificially increasing water conductivity. During a fill cycle, the installer should
dissolve half a teaspoon of table salt (no more) in a cup of water and add it to the cylinder by means of
the fill cup attached to the plumbing section. Open the plumbing compartment and add salt solution
through cylinder outlet. Excessive amounts of salt will result in erratic operation of the unit; however,
normalization of the unit will occur automatically through the solid-state control sequence.
A.1.5 Cylinder Replacement
NOTICE
Risk of improper operation. Can cause equipment damage.
The steam cylinder is disposable and must be replaced at the end of cylinder life. Cylinder life
depends on water supply conditions and humidifier usage. Failure to replace the cylinder at
the end of cylinder life may result in unit damage.
After an extended period of operation, the cylinder will be completely used, as indicated by the red
high-water sensor light illuminated on the cabinet. When this condition is reached, a new
replacement cylinder must be installed.
Contact Emerson or your local Emerson representative to obtain a replacement cylinder. To obtain
the correct cylinder, supply the cylinder model from the white three-digit label on the cylinder, or
supply the model, voltage and serial number from the unit specification label.
NOTE
The red light may come on during initial startup, but this does not mean the cylinder must be
replaced. See 9.0 Startup and 12.0 Operation.