REMOTE MOUNTED BLOWER PACKS -
STEAM LINE
* PRIOR TO CONNECTING THE STEAM HOSE
ENSURE KNOCK OUT HAS BEEN REMOVED.
1.
Field-supplied hard copper tubing or
stainless steel tubing with ½” thick (min.)
insulation is recommended for steam supply,
with NORTEC supplied steam hose coupling
used to make connection to the humidifiers.
See Figure #3.
2.
Do not install electric zone valves on steam
lines. Improper adjustment will
over-pressurize the humidifier.
3.
NORTEC steam supply hose or
field-supplied tubing should be sloped
downwards from the blower pack to the
humidifier. Slope should be at least 2” in 12”
(10 degree slope) to promote condensate run
back. See Figure #4. If upward slope is used
from the blower pack to the humidifier, the
slope should be at least ½” in 12” to promote
condensate removal at the blower pack. If
this slope is not possible, condensate must
be removed before the blower pack. See
Figure #5.
4.
Minimize the length of steam line and keep it
as straight as possible, minimizing bends.
Avoid using 90º elbows. Wherever possible,
use long radius turns (using tube bender on
oversized copper or pairs of 45º elbows).
This will reduce the condensate generated by
heat loss. This will also reduce the back
pressure and avoid the need to install an
extended water trap.
5.
Ensure that the steam hose does not kink or
sag. The steam hose becomes more flexible
when hot. The hose should be supported to
prevent water traps. Only use steam hose
for connection or steam line runs of 5 feet or
less. See Figure #4.
6.
To ensure odor-free steam, always use
NORTEC steam hose. Check steam hose
and hose couplings periodically for cracks,
breaks, kinks. Replace as required. DO NOT
substitute hose. NORTEC is not responsible
for health effects or damage from substituted
hose.
7.
For GS, SE, and NH Series using large size
remote mounted blower packs (>50 lbs/hr)
use 1 5/8” O.D. (Nominal 1 ½”) copper
tubing. For steam runs longer then 20 ft, use
insulated nominal 2” copper to ensure
draining of condensate.
- 2 -
Depth of trap
must be
equal or more
than 3”(76 mm)
Remote mounted
Blower pack
Condensate
Return
Steam line
Min. 3 ft
(91.4cm)
To Drain
Min. 10 degree
slope
Min. 1 ft
(30.4cm)
Field insulated stainless
steel or copper pipe or
flexible steam hose
Figure #3
Steam Line Installation
Avoid Water Traps
Avoid Kinks
Proper Slope
Gentle Sweeping Turns
Figure #4
Steam Hose Installation
Depth of traps
must be
equal or more
than 3” (76 mm)
Min. 3 ft
(91.4cm)
Steam line
Condensate
Return
Min. 3 ft
(91.4cm)
To Drain
Condensate tee at low point
in steam line
Figure #5
Condensate Removal
