Installation; Environmental Conditions; Inspection - Siemens SED2 VFD NEMA Operating Instructions Manual

SED2 VFD NEMA Type 3R/3RHE Bypass Operating Instructions

Installation

Environmental Conditions

NEMA Type 3R/3RHE enclosed bypasses are manufactured for outdoor locations, not in
direct sunlight. The 3R rating provides a degree of protection to the enclosed VFD and
electrical control components from falling rain, snow, and from damage caused by the
formation of ice.
The ambient temperature must be between 14°F and 104°F (-10°C to 40°C) and the relative
humidity must be 0% to 95% non-condensing. Units with the HT1/HT2 designation in their
part number are rated to 122°F (50°C).

Inspection

1. As you unpack the NEMA Type 3R/3RHE Bypass, check for shipping damage. In the
event of damage, contact the transport company.
2. Locate the NEMA Type 3R/3RHE Bypass nameplate and confirm that the unit is
configured to the installation requirements.
3. Verify that the delivery is complete. If not, contact the supplier.
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CAUTION:
1. When locating NEMA Type 3R/3RHE enclosure, make certain that the
heater/finger guard air inlet (Figure 4) is not blocked and that any
environmental substance (such as snow or sand) or other debris will not
potentially block the air inlet.
2. A heater is supplied with all outdoor enclosures to minimize the effects
of condensation. The heater is only powered when the main power to
the enclosure is on. If the unit has been de-energized for any period,
inspect for and rectify any condensation in the enclosure before
reapplying power.
3. The heater should be set above the typical average dew point for your
part of the country. If unsure of your typical dew point temperature, 75°F
(24°C) should be appropriate for most areas.
Siemens Building Technologies, Inc.