TM
Piping
Water Supply Piping
This style of humidifi er utilizes a Tri-Probe conductive
type water control system which is designed for use with
standard (hard or softened) tap water. Use of demineralized,
deionized or reverse osmosis water will cause failure of the
water level control system and void the humidifi er warranty.
Cold or hot standard tap water can be supplied to the
humidifi er. A minimum water pressure of 35 p.s.i. (2.4 Bar)
should be maintained to provide the proper water level within
the humidifi er. DO NOT exceed the maximum acceptable
water pressure of 95 psi (6.6 Bar). If the water pressure is
above 95 psi (6.6 Bar) a pressure reducing valve should be
installed. Failure to do so will cause the supply water hose to
burst due to excessive heat and pressure.
The humidifi er has a factory built-in 1.5” (4 cm) air gap
between the water inlet and the overfl ow. Local codes should
be checked to see if the addition of a vacuum-breaking
device is required. Water connection is made at the bottom
of the humidifi er with 3/8” NPT piping.
Drain Piping
The EC style humidifi er requires two copper drain piping
connections run to an open drain.
The drain piping should be copper or stainless steel. The
use of PVC piping is not recommended; the humidifi er water
temperature may cause the PVC to soften and fail. Use a
drain tempering kit before transition to PVC.
The EC humidifi er has a factory-piped internal water seal/
overfl ow. The water seal must be fi lled (primed) prior to
operation. Remove the Tri-Probe sensor from the tank until
the water overfl ows into and primes the water seal. Once
this is done replace the Tri-Probe sensor.
If gravity drain is not possible please use a condensate
pump rated for 212°F water or contact a PURE Humidifi er
Co. representative to purchase one.
Open Sanitary
Drain
3/8” NPT Water Inlet
Cabinet Overfl ow
Drain
3/4” Drain
Typical EC Series
Humidifi er (Right
Side View)
WARNING:
Humidifi er Reservoir Drain and Cabinet Overfl ow
Drain (see page 3) MUST be run separately.
These lines CANNOT be tied together into a
common drain line. Draining malfunction will occur
causing damage to the humidifi er system.
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