5.31
5. Undo the fittings to enable the transducer to be separated from the sampling panel and
remove the heat transfer chimney by undoing the 4 M4 nuts.
6. Remove the cover of the right hand junction box and disconnect the signal and earth
wires from the terminal block.
7. Undo and remove the two 1/2 inch BSPP nuts on the feedthroughs for the wires inside
the junction box.
8. Remove the junction box and undo the top hexagonal spacer and slide it over the wires.
9. Lift out the inner box assembly.
10. Undo the 4 x M4 nuts holding the temperature switch assembly to the inner box.
11. Remove the old switch assembly and replace with the new one.
12. Refit the inner box, feeding the wires carefully through the outer case and refit the
hexagonal spacer.
13. Refit the junction box by following paragraphs 1 to 6 above in reverse order.
14. Carry out a leak test (Section 5.3.4).
15. Reconnect the power, allow the analyser to warm up for 12 hours and re-calibrate. See
Section 3.6.
5.3.2.7 Replacement of Pressure Transducer (if fitted).
Refer to Figure 5.3
1. Remove magnet assembly by following steps 1 through to 6 of Section 5.3.2.
2. Cut cable tie (1) from transducer body.
3. Loosen transducer (2) by unscrewing body approximately 1/2 a turn.
4. Unscrew and remove 4 x M4 slot head screws from bracket.
5. Lift bracket (4) out and unsolder wires from transducer on back of bracket.
6. Holding pipework, carefully unscrew and remove transducer.
7. Screw new transducer onto fitting by hand (do NOT use a spanner or wrench) taking care
not to stress the pipes.
8. Solder wires onto pins. See Figure 5.3 and replace bracket.
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