12. With a Pozidriv screwdriver, remove the mounting screw from the rear of the block. (The block
must be removed from the rear of the instrument.)
REAR CLAMPING PLATE
13. Install the new block on the flow panel from the rear of the instrument. The block fits on the
panel over two standoffs, in only one direction.
14. Replace the mounting screw on the block and tighten it firmly.
15. Connect the plumbing on the rear of the block. The fittings are labelled on the block. In addi-
On an FID/NPD, replace the hydrogen and air tubes. The hydrogen tube (painted red) con-
nects to the lower fitting. The gas tube retainer fits properly only when the hydrogen and
air tubes are installed correctly.
On an FID or FPD block, connect the ignitor leads. (The leads may be reversed without
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SVC 3- 26
OUTLET FITTING PLATE