Pioneer PDP-V401 Technical Manual page 52

Special installation (Horizontal connections)
3 PDK-4005 wall-mounted Horizontal connections (maximum of four units)
The following table provides recommended operating temperatures for side-by-side installations of the PDK-4005.
Clearance W between the sets
400 mm ≤ W
20 ≤ W < 400
W < 20
If the device must be used at temperatures at or above the given levels and four or more displays are to be used,
provide forced-air cooling with fans or air conditioning so that temperatures at the intake and exhaust sides of the
A and B units remain within the recommended range.
Air temperature
+ 5 °C, maximum
of 40 °C
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A-unit B-unit
W
Ambient operating temperatures
0 to 35 °C
0 to 30 °C (Still)
0 to 35 °C (Animation)
Cannot be used.
C-unit
W W
D-unit
Air temperature
+ 15 °C