Ravenheat CSI 85T Installation And Servicing Instructions page 20

5.5.4 Insert the flue assembly into the wall, being
careful to make sure that the outer air duct
comes flush to the inner surface of the wall
5.5.5 Lift the boiler on to the wall (Fig 34), locating
onto the top coach bolts Fit the two lower
coach bolts and tighten all four securing bolts.
5.5.6 Working above the boiler pull the flue exhaust
duct towards the boiler in order to engage
tube 61 into its header 57A. Position flue into
elbow header and push so as to locate inner
and outer flue correctly ensuring good seal is
made with o rings.
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5.5.4 Insert the flue assembly into the wall, being
careful to make sure that the outer air duct
comes flush to the inner surface of the wall
5.5.5 Lift the boiler on to the wall (Fig 34), locating
onto the top coach bolts Fit the two lower
coach bolts and tighten all four securing bolts.