Drilling instructions for duct installation kit – Vaisala HMT100 User Manual
Page 21
Chapter 3 _______________________________________________________________ Installation
VAISALA _______________________________________________________________________ 21
Drilling Instructions for Duct Installation Kit
42
1
2
3
Ш24
Ш3.
2
0505-178
Figure 8
Drilling Instructions
The following numbers refer to Figure 8 above:
1 =
Mounting
screw
2 =
Tension
screw
3
=
HMP100 assembled in duct installation kit plastic pipe
Drill the holes for the duct installation kit as follows:
1.
Use a 24-mm drill bit to drill a hole to the duct wall for the
humidity probe.
2.
Drill holes for the duct installation kit mounting screws around the
hole in a square arrangement, 42 mm apart from each other. Use a
3.2-mm drill bit to drill the holes for the mounting screws (four
ST4.2×16-C-Z DIN 7981 screws).