Installation
2-3
Ventilated Enclosures
For Type 1 (IP42) enclosures, the following guidelines are
recommended to limit the maximum controller ambient temperature.
There should be a clearance of at least six inches (15 cm) above and
below the controller. This area allows air to flow through the
heatsink. Ventilation openings are required above and below this air
space.
The ventilation outlet should be placed at least six inches (15 cm)
above the controller with the ventilation inlet placed near the bottom
of the enclosure. A filter is required to prevent contaminants from
entering the enclosure.
Use the table below to determine the minimum ventilation openings
and fan/blower requirements.
Table 2.B Minimum Ventilation Openings
①
Cutout size assumes 50% blockage (filters, louvers, etc.)
②
Cutout size is the same as required for the particular fan or blower being used.
③
Dimensions are in centimeters (inches in parentheses).
Non-ventilated Enclosures
For Type 12 (IP54) or non-ventilated enclosures, it is recommended
that a bypass contactor be used. This will allow the SMC Dialog Plus
controller to bring the motor up-to-speed. After the controller is up to
full voltage, it is bypassed. Note that the Energy Saver, Phase
Rebalance, some metering functions, and some protective features of
the controller may no longer be available. See Figure 3.17 on page 3-
13 for this configuration.
SMC Rating Top Cutout
①③
Bottom Cutout
①③
Fan Size
①
24–54A
65 cm
2
(10 in
2
)
65 cm
2
(10 in
2
)
110 CFM
97 and 135A
233 cm
2
(36 in
2
)
233 cm
2
(36 in
2
)
110 CFM
180A
13 × 51
(5 × 20)
②
100 CFM
240A
13 × 51
(5 × 20)
②
250 CFM
360A
13 × 51
(5 × 20)
②
(2) 250 CFM
500A
13 × 41
(5 × 16)
②
275 CFM
650A
②
13 × 76
(5 × 30)
(3) 240 CFM
720A
②
13 × 76
(5 × 30)
(3) 240 CFM
850A
②
13 × 76
(5 × 30)
(3) 240 CFM
1000A
②
13 × 76
(5 × 30)
(3) 240 CFM
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