Threaded Npt And Bsp Mountings - ABB AZ10 Operating Instruction

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Threaded NPT and BSP mountings

WARNING
Failure to observe this warning will result in serious injury.
Before fitting the probe, ensure that the boiler is off and the
flue is cool enough to touch.
If hot process gases are flowing through the flue when the
probe intake tube is inserted, it will direct those gases
toward the operator.
Notes
• The probe can be supplied with either a 2 in NPT or a 2 in BSP
mounting option.
• The gasket joints must be gas tight otherwise errors in the
O2 readings will occur.
Referring to Figure 8:
1 Cut a 75 mm (2.95 in) minimum diameter hole
flue wall.
2 Weld a 2 in NPT or 2 in BSP female threaded boss
supplied) into place, concentric with the hole in the flue.
Figure 8 Standard (2 in NPT) and optional (2 in BSP) mountings
3 Apply high temperature jointing compound to the threads
C of the probe mount adaptor and screw the adaptor into
the boss.
4 Locate a gasket
see Notes, left.
5 Insert the probe intake tube
ensuring that the open side of the intake tube tip faces into
the gas flow – see Figure 7, page 10 and Warning (left).
6 Align the bolt holes
the studs on the adaptor ensuring that the open side of the
intake tube tip continues to face into the gas flow.
An arrow
orientation.
7 Locate a gasket
see Notes, left.
8 Fit the probe body
A in the
ensuring Company name is uppermost.
9 Secure the probe and gasket using six M6 nuts and
B (not
washers
Exit
Gas flow
over the studs on the adaptor –
D
E through the adaptor,
F in the probe intake tube flange with
G is stamped on the tube flange to assist with
H over the studs on the adaptor –
I over the studs on the adaptor
J .
11