Steam Line - Nortec GH Series Installation, User & Maintenance Manual

humidifier (Must be hammer free). See Figure
#17 & 18.
3. For proper operation of DWC, water line must
deliver at least 8 gal/min (30 l/min) of water at
the temperature of no more than 68ºF (20º C).

STEAM LINE

1. Field-supplied hard copper with ½" thick (min.)
insulation is recommended for steam supply,
with NORTEC supplied steam hose coupling
used to make connection to humidifier. See
Figure #20.
Figure #20
2. Do not install zone valves on steam lines.
Improper adjustment will over-pressurize the
gas humidifier
3. NORTEC steam supply hose or field-supplied
piping should be sloped upwards from the
humidifier to the steam distributors. Slope
should be at least 2" in 12"(10 degree slope)
to promote condensate runback. See Figure
#20. If this slope is not possible, condensate
must be removed before the distributor. See
Figure #22. If downward slope is necessary,
slope should be ½" in 12" to promote
condensate to run towards the distributor.
Condensate should be removed just before
entering distributor. See Figure #24.
Figure #21
4. Minimize the length of steam line and keep it
as straight as possible, minimizing bends.
Avoid using 90° elbows. Wherever possible,
use long radius turns (using tube bender on
oversized copper or pairs of 45° 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
connections or steam line runs of 5 feet or
less. See Figure #23.
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 substitute
hose.
7. Steam lines require 1-5/8" O.D. (nominal
1-1/2") copper pipe. For steam runs longer
than 40 feet use insulated nominal 2" copper
to ensure the draining of condensate.
8. Do not use steel or plastic pipe for steam
distribution or hose other than NORTEC
supplied. Substitution will void warranty.
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Figure #22
Condensate To Drain
Figure #23