Quick Start Manual

8.0 Installation
21
8.1 Initial Preparation
The gas supply, gas type and pressure must be
checked for suitability before connection (see Section
7.4).
1. After considering the site requirements
(see Section 7.0) position the fixing template (Fig. 16)
on the wall ensuring it is level both horizontally and
vertically.
2. Mark the position of the two most suitable fixing
slots for the wall plate and boiler lower fixing holes. It is
preferable to use the horizontal fixing slots.
3. Mark the position of the centre of the flue hole (rear
exit). For side flue exit, mark as shown.
4.
Note the shaded area on the template. Pipework
cannot be routed upwards behind the boiler.
5. If required, mark the position of the gas and water
pipes. Remove the template.
6. Cut the hole for the flue (minimum diameter
107mm).
7. Drill the wall as previously marked to accept the wall
plugs supplied. Secure the wall plate using the fixing
screws.
8. Using a spirit level ensure that the plate is level
before finally tightening the screws.
9. Connect the gas and water pipes to the valves on the
wall plate using the copper tails supplied. Ensure that
the sealing washers are fitted between the connections.
8.2 Flushing
1. Connect a tube to the central heating flow or return
pipe (Fig. 17).
2. Flush thoroughly (see System Details, Section 6.2).
3. The use of the optional Baxi Filling Loop Kit (Part No.
248221) will simplify the flushing and soundness
checking.
8.3 Preparing The Boiler
1. Remove all packaging.
2. Stand the boiler on its base by using the rear lower
edge as a pivot.
NOTE: A small amount of water may drain from
the boiler when the plastic caps are removed from
the boiler connections.
Fig. 16
Fig. 17
Combi Instant
FIXING
TEMPLATE
5 mm Minimum
Side Clearance
5 mm Minimum
Side Clearance
Horizontal Side Flue
Centre Line
107mm Dia Minimum
Aperture For Flue Tube
200 mm
Minimum
Clearance
200 mm
Minimum
Clearance
Profile of
Outercase
Vertical Flue
Centre Line
General
Area For
Electrical
Supply
Hot Water
Outlet
(15mm)
Cold Water
Inlet
(15mm)
Heating
Return
(22mm)
Heating
Flow
(22mm)
Pressure Relief
Valve
(15mm)
Gas
Inlet
(22mm)
95 mm
65 mm
Boiler Mounting Bracket Fixing Slots
Drill 8 mm diameter x 50 mm deep
65 mm 65 mm
65 mm
65 mm
Boiler Lower Fixing Holes
Drill 8 mm diameter x 50 mm deep
921.936.1
Comp No 248740 - Iss 1 - 1/01
IMPORTANT
Pipework cannot be
rear routed upwards behind the boiler.
Keep pipework, electrical cables and clips clear of
all shaded areas to allow the correct fitting of the boiler
Fixing Template
Appliance Wall Plate
190mm
For Side Flue Exit
Central Heating Return
Flushing Tube
Wall Plate
Filling Loop