Dometic RO400 Service Manual page 39

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14. With the tee-hande, pull the pump/membrane assembly
up (11). let most of the water drain off from the mem-
brane into the vessel before taking the assembly out.
15. Remove the spring and the end bushing (
lower membrane gable, and put aside.
16. clean the inside of the membrane pressure vessel.
17. lubricate with silicon grease the sealing surface for the
big o-ring inside the vessel (below the seat for the lock-
ing rings, and 20 mm down).
18. Remove the tape that keeps the pump and membrane
together (13).
all necessary parts for the replacement is supplied
with the 'membrane service kit' and the 'pump
service kit'.
19. The procedures differs if the membrane and/or pump
will be replaced.
Replacing the membrane service kit:
a) Unpack the membrane element.
b) lubricate with silicon grease four o-rings (
two o-rings to the new lower membrane gable (15).
Mount the gable to either side of the membrane ele-
ment.
c) Replace with two new o-rings on the upper mem-
brane gable (16).
Replacing the pump service kit:
a) Unpack the pump gable/housing.
b) lubricate with silicon grease two o-rings (
the o-rings to the new upper membrane gable (16),
attached to the pump.
c) Move the tee-handle (
(4) from the old brass gable to the new.
20. Put the pump gable/housing onto the membrane ele-
ment.
21. clean the upper plastic gable and the membrane ele-
ment from tape remains.
22. let the pump/membrane assembly stand with the mem-
brane element downwards.
Tape the membrane element to the upper plastic gable.
Start from the right side of the loop flow hole and tape
clockwise 2.5 revolutions (17). End on the left side of
the loop flow hole.
Do not tape over the loop flow hole!
avoid wrinkles by stretching the tape.
23. lubricate the new, big, o-ring (
pump gable.
24. Install the spring and end bushing on the lower plastic
gable (15).
25. lower the whole pump/membrane assembly into the
pressure vessel.
12) from the
14). Attach
7) and the three locking pieces
CAUTION
18) and put it on the
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seRViCe
11
12
14). Attach
16
18
14
15
hole for loop flow
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cont.
V
13
17