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Humidifier
117 Liebert
®
CRV
™
A.1.1 Humidifier Water Supply and Plumbing
The fill valve is sized for an extended water pressure range of 30 to 80 psi.
For installations where water pressure is less than 15 psi, add a pressure boost pump and notify the
factory; a fill valve with an oversized opening will be supplied.
For installations where water pressure is greater than 80 psi, install a pressure reducing valve in the
water feed line to the unit.
With dirty or muddy water sources (e.g., some well sources), ensure proper filtration by adding an
external filter to the water line entering the unit. (Consult factory for accessories such as filters.)
NOTICE
Risk of improper water supply. Can reduce humidifier efficiency or obstruct humidifier
plumbing.
Do not use completely demineralized water with this unit; it is the minerals that allow the
electrode principle to work.
Do not use a hot water source; it will cause deposits that will eventually block the fill valve
opening.
A.1.2 Humidifier Water Connection
A copper compression olive type coupling for 1/4" O.D. soft copper tubing is provided with the unit and
requires no soldering for the water connection to the unit.
An isolating valve should ALWAYS be placed in the feed water line to allow service of the fill valve.
Each unit is fitted with a fill solenoid valve located on the base drain pan.
Flow openings are designed for water pressure from 30 to 80 psi and are protected by the built-in
strainer.
For inlet water pressure outside this range, the factory should be contacted.
Figure 101 Water connection to humidifier
7/8" Drain
Connection
Use 7/8" ID Hose from Factory
3/8" Cold Water
Olive Connection