Boiler Installation - Grant Combi 90 V3 User, Installation & Servicing Instructions

\
Unpack the boiler
6.1
1 Carefully remove the packaging from the boiler and lift it
off the pallet. If the optional high level flue (Green system)
is to be used, follow the instructions supplied with the kit.
2 The low-level discharge flue terminal, terminal guard and
wall flashing strip are supplied loose inside the boiler.
3 Remove the casing top panel (four screws).
4 The flue may exit the boiler from the left, right or rear of
the casing. To allow for this the boiler is supplied with three
removable panels - two blank panels and one with the flue
outlet hole and seal.
Note: A spare blanking plate with a 112 mm dia. hole is
supplied with the Outdoor Condensing Combi boilers. This
is intended to provide an opening into the boiler if a 110 mm
soil pipe is used as a pipe duct through the wall.
The panel with the flue hole is supplied fitted at the rear of
the boiler, but can be re-positioned on either side to give the
flue outlet position required. If so, a hole for the flue must
be cut in the insulation (inside the casing side panel) using
the hole in the plate as a guide.
5 Slacken the wing nuts holding the flue elbow and rotate the
elbow to the required direction for the flue to exit the casing.
6 Push the end of the flue terminal section with the red seal
through the seal in the casing. The terminal has been factory
lubricated. Take care not to dislodge or damage the red seals.
26

6 - BOILER INSTALLATION

Outdoor Combi 90 V3, Combi Max and Condensing Combi
7 Carefully insert the terminal into the flue elbow until the
bend of the terminal contacts the outer casing, then, pull the
terminal forward approximately 25 mm and rotate the bend
so that the outlet is horizontal.
Rear Exit - The flue must discharge away from the
building.
Side Exit - The flue should discharge towards the rear of
the casing to prevent flue gases re-entering the boiler
casing through the air inlet vents on the casing front door.
The flue terminal must be fitted horizontally to prevent
dripping from the end of the terminal.
8 Tighten the wing nuts holding the flue elbow and fit the
stainless steel flue guard using the two screws provided.
9 The top panel of the casing has been designed so that it may
be fitted to create a slight slope away from the side
positioned against the wall. To tilt the top panel, loosen the
four top panel casing screws, one at each corner and push
down on the side furthest from the wall. Tighten the screws.
See Fig. 15.
10 A wall flashing strip is supplied with the boiler to cover the
gap between the wall and the boiler casing. It should be
secured to the wall leaving a gap of 30 mm between the
bottom edge and the top of the casing top panel, to allow
removal of the top panel for servicing.
Fig. 15