Honeywell HON 670 Component Documentation, Maintenance Manual And Spare Parts page 24

Assembling the double
diaphragm system
HON 670 / HON 671 Controllers Component Documentation
Figure
Proceed as follows:
Figure
Step Description
6 Replace the O-ring (1) with a new, lubri-
cated O-ring. Check the edge of the nozzle
for damage. Replace it if necessary.
Note: See the appendix for the lubricants
to be used.
7 Replace the diaphragm (1).
Place new snap-on gaskets (2) into the new
diaphragms.
Step Description
1 Turn the nozzle (1) such that the pin (2) is
positioned coaxially to the bore.
2 Keep the connecting piece (1) in position
and insert the nozzle (2) into the connect-
ing piece (1) until it can go no further.
3 Put the new diaphragm (2) and the dia-
phragm plate (1) in place.
Make sure that the diaphragm is aligned
correctly: The side of the diaphragm that
has a depression at the center should be
facing upward.
Maintenance
24