Condair Nortec RS 10, Инструкция по эксплуатации

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34
Planning
2596995_0_EN_1905 Nortec RS
4.3.3.3 Atmospheric Steam and Condensate Lines
The Nortec RS humidifier can handle backpressures up to 5.5 inches of water column (1.37 kPa), or up
to 10 inches of water column (2.49 kPa) with the optional fill cup extension. When the combined effect
of backpressure in the steam line and the duct static pressure exceed this limit, it can adversely affect
operation of the humidifier. The steam line material, its diameter, length, slope and the number of bends
in the line affect the backpressure, which must be considered carefully when planning. Other factors
such as insulation of the steam line to reduce efficiency losses caused by the formation of condensate,
as well as condensate drainage to permit free venting of steam must also be considered.
The following is an overview of the requirements for atmospheric steam and condensate lines. For more
details refer to “Best Practices for Installing Steam and Condensate Lines” in the Nortec RS Installation
Manual (Condair document 2582302).
Steam Lines
Steam lines must be made of copper (MED Type-L) or stainless steel (minimum DIN 1.4301) exclu-
sively. Use a Condair-supplied steam hose for short distances only. Steam lines made of any other
materials may adversely affect operation of the unit.
The length of the steam line and the number of bends in the line should be kept to a minimum to
minimize backpressure and reduce efficiency loss. The maximum recommended length of steam
line is listed in
Table 12 on page 35
.
Refer to
Table 13 on page 35
for equivalent length of some common fittings when calculating total
equivalent length of the steam lines. Also refer to
"Condensate Loss" on page 53
when calculating ef-
ficiency losses based on total equivalent length of the steam line.
The steam line should not have any restrictions, as it can increase backpressure. Backpressure in
the line combined with duct static pressure should not exceed 5.5 inches of water column (1.37 kPa),
or up to 10 inches of water column (2.49 kPa) with the optional fill cup extension.
Steam lines (from Nortec RS 90L/130/180 with dual steam cylinders or multiple humidifiers) should
not merge except at the steam distributor, and ONLY if the steam cylinders operate in parallel mode.
Refer to "Combining Steam Lines" on page 37 .
The steam line should be connected to the steam outlet on the humidifier and the steam distributor
with short lengths of Condair steam hose, and secured with hose clamps.
The steam line must be supported independently so there is no load on the humidifier.
The steam line must have a constant minimum upslope of 10°, or a constant minimum downslope
of 2°, as shown in Figure 18 .
The steam line must be insulated with a minimum of 1 in (25 mm) pipe insulation over its entire length
to minimize the formation of condensate.
Steam line should be properly supported to prevent sagging. If necessary mount condensate drain
at lowest points.
Figure 18:
10
o
2
o
12 in
(300 mm)
2 in
(50 mm)
12 in
(300 mm)
½ in
(12 mm)
Minimum Upslope Minimum Downslope
Steam Line Slope