10
Drain Piping
The “ECDDR” style humidifier requires one 3/4” and
one 1/2” stainless steel drain piping connections run
to an open drain.
The drain piping should be 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 “ECDDR” humidifier has a factory
-
piped internal
water seal. Prime water seal prior to operation by
removing the overflow hose and pouring water into it.
Re
-
attach the overflow hose and tighten hose clamp.
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 “ECDDR”
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.
Cabinet Overflow
Drain
VIEW
(By Others)
1/2" NPT Reservoir
Overflow (By Others)
3/4" Drain Piping
(By Others)
6 1/2"
2 3/8"
Reservoir Drain Outlet
Ø1 7/8"
Cabinet Overflow
1/2" NPT
1 1/2" 2"
8 7/16"
15"
Water Inlet 3/8" NPT
Electrical Inlet Ø1 1/8"
BOTTOM VIEW
Steel Drain
Open Sanitary
Drain
Piping
Water Supply Piping
Supply pressure: 35
-
50 psi
This style humidifier utilizes a float
-
operated fill valve
system which is designed for use with deionized,
demineralized, or reverse osmosis water. Use of
mineralized tap water will cause fill valve failure and
will void the humidifier warranty.
Install stainless pipe on makeup water line within 5
feet of humidifier fill valve connection. If plastic pipe is
used beyond this point a check valve is required to
prevent steam from entering the plastic section in the
event that the water treatment system runs out of
water.
Cold or hot deionized, demineralized, or reverse
osmosis 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 50 psi (3.5 Bar). If the
water pressure is above 50 psi (3.5 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.
