Technical data

14
ALPHA700
18.2.5
Insert boiler assembly tools into upper and lower waterway
ports and (following specific tool usage instructions) compress
boiler sections together with even tightening of upper and lower
tools to avoid that section castings are stressed on an angle.
Sections should be compressed together until opposing
faces touch at 2 points.
Remove the tools.
If using MHS Alpha 700 Compact Assembly Tools, insert
tools as shown in figs 3 and 4 and ensure proper and even
bearing of tools on the hubs of the waterway ports. Compress
the sections together by alternate tightening of the upper and
lower tools paying attention to keep the sections parallel.
Continue until opposing faces touch at 2 points.
Remove the tools.
18.2.6
Continue to assemble the boiler body until all of the intermediate sections plus the front section have
been applied, following generally and repeating the procedures described in 18.2.3 to 18.2.5.
18.2.7
Fit the 4Nr tie rod assemblies to the assembled boiler body at top and bottom, left and right hand along
the length of the body adjacent to the waterway ports.
Tighten the tie rods to maintain the close coupling of the sections one to another, but do not over
tighten. The purpose of the tie rods is to hold the boiler body in an assembled manner and not to add
compression.
18.2.8
Check position of boiler body and if necessary, ease into final required position.
18.2.9
Fit top and bottom front water closure blanks using gaskets and fixings provided.
Fit temporary “test” blanks to rear flow and return connections and filling/draining test tee
arrangement to drain cock port at rear lower left hand side of rear section.
Fill and hydraulically test boiler (venting air whilst filling from slackened upper test blank).
Maximum test pressure must not exceed 8.25 bar.
Following a successful hydraulic test; drain boiler whilst admitting air through slackened upper test
blank.
When boiler is fully drained, remove test blanks and attach flanged flow connector pipe spool piece
which includes instrument pockets.
18.2.10
As appropriate, fit flue gas way baffle plates (A) vertically
across the outside of the rear section exhaust ports and retain
by interference by the flue connection hood. See fig 5.
Boiler Model Baffle plate width (w) mm.
Alpha 700/300 105
Alpha 700/340 65
Alpha 700/380 65
Alpha 700/425 65
Alpha 700/470 65
Alpha 700/510 No baffles required
Alpha 700/555 No baffles required
Alpha 700/600 No baffles required
Alpha 700/640 No baffles required
fig.3
fig.5
fig.4
A
W