10
Drain Piping
The “EC” style humidifier 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
humidifier water temperature may cause the PVC to
soften and fail. Use a drain tempering kit before
transition to PVC.
The “EC” humidifier has a factory-piped internal
water seal/overflow. The water seal must be filled
(primed) prior to operation. Remove the Tri-Probe
sensor from the tank until the water overflows 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 Humidifier Co. representative to purchase
one.
Typical “EC” Series
Humidifier (Right
Side View)
3/4” Drain
Open Sanitary
Drain
3/8” NPT Water Inlet
WARNING:
Humidifier Reservoir Drain and Cabinet
Overflow 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
humidifier system.
Piping
Cabinet Overflow
Drain
Water Supply Piping
This style humidifier utilizes a Tri-Probe Sensor
conductive-type water control system that is
designed for use with standard (hard or softened)
tap water. Use of deionized, demineralized, or
reverse osmosis water will cause failure of the
water level control system and void the humidifier
warranty.
Cold or hot standard tap water can be supplied to
the humidifier. A minimum water pressure of 35 psi
(2.4 Bar) should be maintained to provide the
proper water level within the humidifier. DO NOT
exceed the maximum acceptable water pressure of
60 psi (4.1 Bar). If the water pressure is above 60
psi (4.1 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 humidifier has a factory built-in 1.5” (4 cm) air
gap between the water inlet and the overflow.
Local codes should be checked to see if the
addition of a vacuum braking device is required.
Water connection is made at the bottom of the
humidifier with 3/8” NPT piping.
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