Emerson Process Management 3420 Carbon Monoxide Alarm User Manual


 
266 Removal without Extractor Tool
Section 7: Maintenance and troubleshooting Reference, Installation, and Operations Manual
June 2013 3-9000-743 Rev S
Procedure
1. Blow the line down according to the site standard operating procedures.
2. Ensure that the line pressure is down to atmospheric pressure prior to disassembly.
3. Disconnect transducer cabling and chordset from the transducer assembly by turning
the cable nut counter-clock wise.
4. Meters with M-mounts or P-mounts, remove the mount cover by loosening the two
mount cover captive screws with a flathead screw driver (see Figure 7-4).
5. Disconnect the transducer cable nut. Pull the chordset from the transducer assembly.
Note: Do not twist the chordset as you disconnect it from the transducer assembly.
6. If the meter is equipped with T-21 or T-22 transducers, remove the transducer retainer
using a 1 1/8” wrench and then disconnect and remove the transformer (Figure 7-5).
Note: T-21 transducers use W-01 transformers and T-22 transducers use W-02
transformers.
Figure 7-5 T-21 and T-22 transducer assembly
A.
A. Transducer cable (max. length 15 ft.)
B. Transducer cable nut and chordset
I.
J.
C.
B.
D.
E.
G.
C. Transformer retainer (Standard P/N 1-360-01-958 or HIgh Temperature P/N 1-360-01-978)
D. Transformer assembly T-21 (W-01 P/N 1-360-03-090) or T-22 (W-02 P/N 1-360-03-110)
E. Transducer holder
F. Transducer holder O-rings
G. Set screw holes (end of transducer holder)
T-21
H. Transducer stalk (optional)
W-01
Transformer
W-02
Transformer
T-22
F.
H.
I. Transducer assembly
J. Mount and backup O-ring