ACH550-PCR/PDR User’s Manual 3-31
Technical data
UL Type / NEMA 1 & 12, Floor mount enclosure mounting dimensions
Additional free space recommendations
In addition to the free space requirements for cooling shown in the ACH550-UH
User’s Manual (Cooling on page 1-318), allow:
• 800 mm (31.5 in) in front of UL Type/NEMA 1&12 floor mount enclosures – room
for the cabinet door to swing open.
• 305 mm (12 in) above UL Type 12/NEMA 12 floor mount enclosures – room for
fan replacement.
Degrees of protection
Available enclosures:
• UL Type 1 (NEMA 1 / IP 21) enclosure. The site must be free of airborne dust,
corrosive gases or liquids, and conductive contaminants such as condensation,
carbon dust, and metallic particles.
• UL Type 12 (NEMA 12 / IP 54) enclosure. This enclosure provides protection from
airborne dust and light sprays or splashing water from all directions.
• UL Type 3R (NEMA 3R) enclosure. This enclosure provides protection from the
ingress of water (rain, sleet, or snow). The external formation of ice does not
damage this enclosure.
Plenum Rating: ACH550 drives have been evaluated in accordance with the
requirements of UL508, meets all of the requirements for plenum rated drives, and is
“Suitable for Installation in a Compartment Handling Conditioned Air”.
UL Type/ NEMA 1 & 12 – Dimensions for each Frame Size
Ref.
R7 & R8
Top View
mm
in
W 806 31.7
D 659 25.9
a 675
26.6
b 474.5 18.7
c 61 2.4
d 65.5
2.6
Mounting Hardware
11 mm
13/32
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