Nortec Blower Packs 380V - Manual (Page 6)

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2008-04-28
B. REMOTE MOUNTED BLOWER PACKS – WALL MOUNTING
(1) Steam and condensate line connections are on the bottom of the blower pack. The
condensate connection is 3/8” and the steam lines are 7/8” or 1 ½” depending.
Ensure that the knock out on the steam inlet has been removed prior to use.
(2) To wall mount the Remote Blower Pack use 2 #12 x 3” long wood screws, supplied
by others. These screws must be fastened securely on a 2 x 4 wood stud or
equivalent support. If any spacer material is used between the bracket and the
structural material such as drywall, increase the fastener accordingly. In addition,
install a single field supplied fastener in the center hole in the back of the unit to
prevent the unit from being bumped off the support screws.
C. REMOTE MOUNTED BLOWER PACKS – STEAM LINE
NOTE
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. Use NORTEC supplied steam hose
to make connection from the humidifiers to the metal lines. See Figure 3 Steam
Line Installation.
(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 Steam Hose
Installation. If upward slope is used from the blower pack to the humidifier, the
slope should be at least 2” per 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 Condensate Removal.
(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 Steam
Hose Installation.
(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.