Specifications

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Installation
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SDU-E condensate drain connection
1. Piping must be minimum DN20 and rated
for 100 °C minimum continuous operating
temperature.
2. Drain line must be piped as shown in
Figure 22-1. Provide a 152 mm drop prior to
a 102 mm water seal to ensure condensate
drainage from the SDU-E, and to keep steam
from blowing out of the drain line.
3. After the water seal, run the drain line to an
open drain with a 25 mm vertical air gap. Cut
the drain line at a 45 degree angle on the end
above the drain to permit a direct stream of
water into the drain pipe while maintaining a
25 mm air gap.
4. All drain lines must be installed and sized
according to governing codes.
5. The drain line should have a union installed
directly on the dispersion box DN20 nipple to
accommodate future removal of the SDU-E
shroud.
6. A drain line and water seal must be connected
to the SDU-E fan unit dispersion box DN20
nipple. If the condensate is not drained
from the dispersion box, standing water
will accumulate. See Warning below.
7. The dispersion box is constructed with a pitch
toward the drain; however, the SDU-E frame
must be installed plumb and level for the
dispersion box to drain properly.
Mounting SDU-E
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seal (provided by installer). See Figure 22-1 and instructions at
left.
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clearance. See Figure 23-1 and Table 23-1).
WARNING
Hazards of standing water in SDU-E
If standing water is allowed to accumulate
in the dispersion box, it can:
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can cause illness.
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discharge from the SDU-E fan unit,
which can cause severe personal injury.
Figure 22-1:
SDU-E drain line piping
Install SDU-E frame plumb and level
Union
Elbow
25 mm air gap
Dispersion box
DN20 pipe thread dispersion box drain and P-trap
piping, rated for 100 °C
Spill funnel. Plumb to floor drain.
Open floor drain. Refer to governing codes for drain
pipe size and maximum temperature requirements.
OM-1245
Drain
102 mm