Vaisala HMW90 - Manual (Page 30)

User's Guide _______________________________________________________________________
28 ___________________________________________________________________ M211399EN-F
Selecting Location
The conditions at the location should represent well the area of interest.
Do not install the transmitter on the ceiling. Avoid placing the transmitter
near heat and moisture sources, close to the discharge of the supply air
ducts, and in direct sunlight.
1111-070
Figure 11 Selecting Transmitter Location
Use the mounting holes to attach the mounting base securely. Use at least
two screws (not included, max screw diameter 4 mm). Remember to
leave sufficient clearance below the transmitter to operate the slide. For
mounting dimensions, see section Dimensions in mm on page 86.
CAUTION The arrow on the mounting base must point straight up after installation.
Proper orientation is important: air must flow through the vents on the
bottom and top.