Figure 14/2 shows the cylinder mounted to the burner or boiler front via a simple distance piece
bolted to the cylinder, and the boiler front. This mounting arrangement can be supplied by Fireye,
part number RET MT2.
Figure 14/3 shows the cylinder mounted to the boiler front via a simple distance piece. This arrange-
ment is bolted to the front of the cylinder and simply screwed to the mounting tube via the 1" BSP
thread on the tube. the Fireye part number for this is RET MT1
FIGURE 12.
Both of the above arrangements have allowed a 100mm distance between the end of the cylinder
and the burner or boiler front. This distance is fixed for Figure 14/2, using the Fireye mounting
piece, but can be site set if required for Figure 14/1 above. The mount tube in the burner is customer
supply only, and generally requires to be 1 inch nominal bore, or bigger.
Depending on windbox/furnace pressures, it may be necessary for the customer to provide a seal
between the retractor rod and the burner/boiler front plate to prevent hot gases coming back out. Fig-
ures 14/2 & 14/3 resolve this issue as the assemblies provide a seal, and a tapped entry on the tube
allows air to be blown into the space, and down the mount tube.
Having now fixed the retraction cylinder, the HESI rod is simply passed through the center of the
tube, adjusted for the correct position when inserted, and simply locked onto the outer tube by
means of a two part clamp arrangement, and secured by means of two bolts.
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