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4 Operational guidelines
4.1
Replacing the setpoint springs
(see figure 2 chapter 2.2)
a) Completely release the maximum and minimum springs (V2 and V1) by turning the
spring seats (G and I) of the springs all the way down.
b) Remove pressure converter after loosening the corresponding screw connection U
(top and bottom of the pressure converter need not be disconnected).
c) Replace setpoint springs.
d) Re-mount pressure converter.
e) Set the pressure as described in chapters 4.4 and 4.5.
4.2
Setting the lower threshold value
a) Screw the minimum spring seat I all the way down (minimum spring is fully
released).
b) Screw maximum spring seat G all the way up (maximum spring is fully
compressed, don't block).
c) Set the pressure in the pressure converter between lower and higher threshold
value, at approx. half the value of the higher threshold value.
d) Screw in set screw S until the balance handle H is horizontal. The balance handle
should not have any play now at the points of support N and Q and at the balance
jaw P. Fix the set screw with lock nut T.
e) Lift valve shaft L with handle arm R and lock switch pin M with balance jaw P.
f) Lift the valve by pushing in hand wheel H3 and turning it anti-clockwise.
g) Now set the lower threshold value of the pressure converter.
h) Turn the minimum spring seat I up until the SVC086 disconnects.
i) Place balance handle H horizontally again by adjusting the pressure in the
pressure converter as described in point c).
j) Repeat steps e) to j), resp. steps e), h), i), and j) a number of times and adjust
minimum spring seat I if necessary.
Check that the SVC086 disconnects at the right threshold value.
© 2017 Honeywell International Inc
Operation and maintenance manual HON HSV086
16
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