8.
For electric humidifiers (NHTC & NHPC only)
using a small size blower pack (<30 lbs/hr),
steam lines require 7/8” O.D. (Nominal ¾”)
copper tubing. For steam runs longer than
20 ft, use insulated nominal 1” copper to
ensure draining of condensate.
9.
When using the GS, SE, NHDI/NHSC
Humidifiers and RO / DI water supply, all
steam lines should be in stainless steel.
10.
Do not use plastic pipe for steam distribution
or hose other than NORTEC supplied.
Substitution will void warranty.
11.
If steam line is routed below the blower pack,
or if the blower pack is lower than the
humidifier, a condensate trap “tee” will be
required to remove water at this low point.
Run the condensate from the trap to the
nearest drain lower than the blower pack.
See Figure #5.
12. Do not run the steam line more than 1 foot
per lb/hr output. Example, 10 lbs/hr should
not have a steam run longer than 10 feet. If
long runs are unavoidable, the humidifier
should be sized larger to compensate for
condensate losses and insulated stainless
steel or copper should definitely be used.
CONDENSATE RETURN LINES
1.
NORTEC blower packs have built-in
connections for draining off condensate.
These condensate lines must be connected
to the nearest floor drain, back to the unit
(NHTC & NHPC, NHSC/DI only) or a
condensate pump when using short
condensatel runs. (Available from unit).
2.
Always incorporate a trap in routing of
condensate return lines. Condensate that
accumulates in trap will prevent possibility of
steam escaping. Depth of the trap must be
equal or more than 3” (76 mm) See Figure
#6.
3.
Ensure the trap is 3’ minimum under the
blower pack and as close to the floor drain as
possible.
PRIMARY VOLTAGE CONNECTION
1.
All blower packs for SE and GS unit are
wired by others to be powered by an
independent circuit.
2.
A control thermostat, mounted on the steam
distributor, cc starts the fan when steam is
generated.
3.
NH Series remote mounted blower packs
wired to a humidifier or independent circuit
require field wiring between two primary
voltage terminal blocks and two low voltage
control (class 1 circuit wiring required)
terminal strips; one of each located in
humidifier and remote blower pack cabinet.
To properly access the primary block on the
humidifier, it may be necessary to remove
the top. To connect the primary and control
(class 1 circuit wiring required) wiring, the
wiring is fed through the grommet provided in
the bottom of the blower pack.
4.
Field wiring of remote blower packs must
conform to national and local electrical
codes. Refer to wiring diagram supplied at
the back of this manual (See page 9).
5.
For NH Series use approved wire for power
connection from two pole terminal block of
remote blower pack to additional two pole
terminal block inside electrical section of
humidifier.
- 3 -
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
Figure #6
Condensate Return Line Trap
