Yaskawa YASNAC PC NC Connecting Manual - Manual (Page 26)

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YASNAC PCNC Connecting ManualChapter 1: General
(2) Heat Exchanger Cooling Capacity
Where cooling capacity is insufficient even with a circulating fan mounted in the
enclosure, Yaskawa can provide heat exchangers.
The heat generation indicated in the above table is the allowable heat generated when the
internal temperature increase in the enclosure is limited to under 10
o
C.
Example: Allowable Heat Generated in the Enclosure with Heat Exchanger
The amount of internal heat generated to make the internal temperature under 10
o
C when
the enclosure is equipped with a HEATEX02 Heat Exchanger is expressed by the
following equation:
.....................................................
(3) Mounting Heat Exchanger
Heat exchanger should be mounted on the enclosure provided by the machine tool
builder. Fig. 1.5 shows a mounting example. Mount the exchanger so that the internal air
is drawn from the upper portion and discharged through the lower portion, while external
air is drawn in from the lower portion and discharged through the upper portion.
Fig 1.3.1.1: Mounting of Heat Exchanger on the enclosure made by Machine builder
Table 1.3.1.1: Heat Exchangers
Heat Exchanger Cooling Capacity External Dimensions (mm)
REX1550 100W /10
o
C 295 width x 890 height x 50 depth
HEATEX02 250W /10
o
C 440 width x 924 height x 50 depth
P= k
.
A
. ∆Τ+ 250
W
/10 o
C
= 6 x 4.16 x 10 + 250
= 499 W/
10 o
C
therefore, it is necessary to be under 499W.
Heat exchanger
Enclosure
External air
Internal air