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4.1 Replacing the PCB housing seals, PCB cover and PCB
Part numbers:
PCB housing seals: AW501 051
PCB cover: AW501 052
PCB: AW501 050
Referring to Fig. 4.2:
1. Remove and retain the 4 PCB cover fixing screws and
A
washers
and remove the PCB cover
2. If replacing PCB housing seals, remove and discard housing
C
seal
.
3. Disconnect all cables from the PCB
glands and remove cables.
4. Remove and retain the 4 PCB housing fixing screws and
E
washers
and remove the PCB housing
5. If replacing PCB housing seals, lift PCB housing seal
of the groove and discard.
6. Remove and retain the 2 PCB fixing screws and washers
and remove the PCB
the new (large) PCB housing seal
amount of silicone sealant or grease can be used to help
retain the seal in place).
7. Fit the new PCB to the rear of the main case using the 2 PCB
retaining screws and washers
8. Refit the PCB housing
D
screws and washers
Referring to Fig. 4.3 and Table 4.1 for terminal connection details:
9. Make cable connections at the new PCB.
Referring to Fig. 4.2:
10. If replacing PCB housing seals, fit the new (small) PCB
C
housing seal
between the PCB cover
F
housing
(a small amount of silicone sealant or grease can
be used to help retain the seal in place).
B
11. Refit the PCB cover
A
and washers
, ensuring PCB housing seal
correctly in its groove.
Fig. 4.2 Replacing the PCB housing seals, PCB cover and PCB
1
B R
SC R
G W
2 3 4
Fig. 4.3 Wet section PCB cable entries – see Table 3.1 for connections
B
.
D
, loosen all cable
F
.
D
. If replacing PCB housing seals, fit
G
in the groove (a small
H
.
E
using the 4 PCB housing fixing
.
B
using the 4 PCB cover fixing screws
C
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36
5
6
Navigator 550 | Sodium wet-section | Spares replacement procedures | INF13/115–EN Rev. B
Entry
Cable
Serial (Modbus) – refer to
Operating Instructions
1
(OI/ASO550-EN)
for multiple wet-section setup
2 Sodium electrode
3 Pt1000 temperature sensor
4 Reference electrode
5 Pressure switch
6 Calibration valve
G
out
Stream switch valve –
H
single-stream
7
Stream switch valve –
multi-stream
Flowmeter – stream 1
Flowmeter – stream 2
8
(multi-stream)
Flowmeter – stream 3
(multi-stream)
and PCB
Table 4.1 Wet-section cable terminal connections
4.2 Replacing the flowmeter assembly and flowmeter cable(s)
Part numbers:
is located
Flowmeter: AW501 068
Single-stream cable: AW501 086
Multi-stream cable: AW501 087
Referring to Fig. 4.4:
1. Disconnect the flowmeter cable
and remove the sample inlet tubing
inlet spigot
cable disconnection details and remove / discard the cable(s).
2. Disconnect the flowmeter
pressing the ring and pulling the flowmeter away.
3. Fit new flowmeter(s) / cable(s) in the reverse order of removal
–
ensure
single-stream) is connected at each flowmeter.
8
7
Fig. 4.4 Replacing the flowmeter assembly and flowmeter cable(s)
4 Replacement procedures
Color
Terminal Description
Red
Black
Green
White
Screen
Screen
Core
Red
Blue
Black
Red
Black
Green
Brown
Red
Black
Yellow
Orange
Red
Black
Green
Brown
Red
Black
Yellow
Orange
Red
Brown
Black
Orange
Yellow
Green
Blue
Violet
Grey
A
from the flowmeter
C
D
. If replacing cable(s), refer to Section 4.1 for
B
from the QD connector
the
correct
cable
type
R
24 V
B
0 V
G
Data +ve
W
Data –ve
SCR
Screen
34
N/A
36
33
N/A
35
32
N/A
25
N/A
26
N/A
7
Valve 1 +ve
8
Valve 1 –ve
9
Valve 2 +ve
10
Valve 2 –ve
11
Regen. +ve
12
Regen. –ve
1
Valve 1 +ve
2
Valve 1 –ve
1
Valve 1 +ve
2
Valve 1 –ve
3
Valve 2 +ve
4
Valve 2 –ve
5
Valve 3 +ve
6
Valve 3 –ve
13
+ve
15
GND
17
–ve
20
+ve
22
GND
24
–ve
19
+ve
21
GND
23
–ve
B
from the flowmeter
E
by
(multi-stream
or
3
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