Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 11)

PC NC Maintenance Manual Chapter 1: General Installation and Electrical Connection
1-8
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:
Therefore, the amount of internal heat generated must be less than 499W.
(3) Mounting Heat Exchanger
The heat exchanger must be mounted on the enclosure provided by the
machine tool builder, as shown in the figure below. Mount the exchanger so
that the internal air is drawn from the upper portion and discharged through the
lower portion, while the external air is drawn in from the lower portion and dis-
charged through the upper portion.
Figure 1.7: Mounting of Heat Exchanger on the Machine Builder’s Enclosure
P= k
.
A
. ∆Τ+ 250 W /10 o
C
= 6 x 4.16 x 10 + 250
= 499 W/
10 o
C
Heat exchanger
Enclosure
External air
Internal air