Pure Humidifier ERDDR Series, Installation Instructions, Operation And Maintenance Manual

Page: 8 / 24

7
Injection Tube and Flexible Hose Installation
Installation
Injection tube shall be installed in the center
of the duct. Hose and injection tube should
be pitched back to the humidifier two inches
(5 cm) per foot (31 cm). If proper pitch cannot
be maintained, or the injection tube is
mounted lower than the humidifier, a drain
"tee" will be required (reference drain "tee"
illustration).
Install the tube with the steam ports injecting
steam up. NOTE: If narrow ducts (6”/15 cm
or less, in height) are utilized, install the tube
with the steam ports injecting slightly with the
airflow (2 o’clock position).
The hose connects to the injection tube and
humidifier with stainless steel hose clamps
(by PURE Humidifier Co.).
Galvanized steel duct plates are provided to
seal the opening where the tube enters the
duct.
Δ
Typical “ERDDR” Series
Electric Humidifier
3/4” SW Condensate
drain line (by others)
Δ Minimum water seal of 2” plus duct
static pressure. The water seal
height may have to be increased if
excessive duct static pressure
Open Sanitary
Drain
Flexible Hose
Stainless Steel
Drain Tee
(optional)
Duct (beneath
humidifier)
Flexible Hose
Pitch 2” (5 cm) per foot (31 cm)
back to the humidifier.
Duct Plate
Injection Tube
Pitch 2” (5 cm) per foot (31 cm)
back towards the humidifier.
Duct
Typical “ERDDR” Series
Electric Humidifier
4”
Insertion Length/
Duct Width
8”
Tube Detail
1 1/2ӯ