Prepare The Wall; Fit The Boiler; Connect The Pipework - Baxi Luna 3 Comfort Series Installation And Servicing Instructions

4... clearances For coMBustIBles
1.77 in / 45 mm
top and botton 0 in / 0 mm with a fire-
resistant material betwenn the boiler
and the combustibles material.
Fig. 
1 Decide upon the position of the boiler taking into account the clearances required for servicing and the flue terminal
position.
 Tape the template to the wall (ensure it is level and the right way up) and mark the position of the holes for the boiler
mounting bracket and bottom fixings. If rear exit flue is used, mark the position of the hole for the flue.
3 If side exit flue is to be used, continue the horizontal centre line of the flue across the wall to the side wall, then along
the side wall (ensure the lines are horizontal). This will give the position of the centre of the hole for the flue.
4 Cut the 4.33 in / 110 mm diameter hole in the wall for the concentric flue.
1 Lift the boiler and locate it on the wall.
 Adjust the position of the boiler, as necessary. Fit the screws to secure the boiler in position.
1 Thoroughly flush out all the water pipework.
note: Ensure that all the plastic caps are removed from the boiler connections.
 Secure all the valves/fittings to the boiler- use the washers supplied, ensuring they are facing the rear wall. Fit the union
bends to the valves.
note:
a. If soldering to the boiler union bends, ensure that the bends are not connected to the valves, otherwise the internal
seals may be damaged.
b. Ensure the 3/4" / 22.2 mm isolating valve with the filter is fitted to the heating return connection.
c. Fit the pressure relief valve connection before the isolating valves.
3 Connect the system pipework to the boiler.
note: Do not forget that the pressure relief valve discharge pipe must be routed clear of the boiler to a drain in such a
manner that it may be seen, but cannot cause injury to persons or property.
4 Ensure that all the valves are closed (spindle flats at right angles to valve) and do not turn on the water or gas supplies
at this stage.
IMportant
The boiler and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing
of that system at test pressures in excess of 1/2 psig (3.5 kPa).
The boiler must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any
pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig (3.5 kPa).
The boiler shall be installed such that the gas ignition system components are protected from water (dripping, spraying, rain,
etc.) during appliance operation and service (circulator replacement, condensate trap, control replacement, etc.)
InstructIons pertaInInG to tHe Installer
17.71 in /
1.77 in / 45 mm
450 mm

4.3 - prepare the wall

4.4 - fit the boiler

4.5 - connect the pipework

0
IMportant:
• the boiler must not be installed on carpeting.
• Keepeng boiler area clear and free from flam-
mable vapors and liquid.
95.188.3 - GB