PCME QAL 181 X, User Manual, Page: 22 / 106

- PCME QAL 181 MANUAL: 22 -
Provide a sufficient opening/hole in the stack wall:
Minimum hole size
88mm (allows for rust build up in flange mounting)
Maximum hole size 110mm
IMPORTANT: Weld the flange mounting tube so the ‘angle of installation’ is horizontal
or pointing slightly downward e.g. 5º, to allow condensate to drain off.
On horizontal ducts, do not install the probe pointing vertically downloads. This will cause dust to
drop into the end cap.
On thin walled ducts provide suitable reinforcements to minimize vibration.