Section 5
MAINTENANCE
19
Figure 5-5 Sullicon Control
justed by physically propping the pressure switch
contacts open at the plastic contact carrier board
and turning the Sullicon Control stop screw until
the sump pressure gauge reads 40-55 PSI. the
stop screw is turned clockwise to increase the
pressure and counterclockwise to decrease the
pressure.
DANGER
DO NOT touch the electrical contacts
terminal board or leads pressure switch
with any metallic object. Severe electri -
cal shocks will occur.
Cycle the Control System several times and re-
check all pressure settings.
MINIMUM PRESSURE VALVE MAINTENANCE
Refer to Figure 5-6. Minimum Pressure Valve Main-
tenance is quite minimal. The only parts w hich nor-
mally require replacement are t he seal ring on the
piston rod and the ”0” rings w hich seal the housing.
F ollow the procedure explained below for replace-
ment of these parts.
1. Evenly remove the four bolts securing the cover
to the housing. CAUTION: This cover is spring
loaded, remove carefully.
2. Remove cover and ”0” ring.
3. Remove the spring.
4. Remove piston rod.
5. Remove quad ring.
6. Remove the cover plate and sleeve.
7. Discard the stop and cover plate ”0” ring.
8. Clean all parts thoroughly including the cover
bore, h ousing bore and sleeve.
9. Replace the piston rod quad ring.
10. Coat the piston rod, cover bore, housing bore
and sleeve with Parker Super ”0” Lube or an
equivalent quality grease.
11. Replace cover plate ”0” ring.
12. Install stop and sleeve.
13. Replace cover plate.
14. Replace piston rod.
15. Install s pring.
16. Replace cover ”0” ring and cover (tighten bolts
evenly) .
THERMAL VALVE MAINTENANCE
Refer to Figure 5-7. For thermal valve maintenance,
use repair kit number 1084. Follow the procedure
explained below for repair kit installation.
1. Remove appropriate piping for disassembly of
thethermalvalvehousing.
2. Remove the four (4) capscrews which hold the
housing together and pull the upper housing
away from the lower housing.
3. Remove element.
4. Remove and replace the element seal in the up-
per h ousing.
5. Remove and replace the ”0” ring between the
upper a nd lower housings.
Figure 5-6 Minimum Pressure Valve
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