Boiler Location; Central Heating System; Vent Termination Minimum Clearances - Baxi Luna 3 Comfort Series Installation And Servicing Instructions

A = 12" clearances above grade, veranda, porch, deck or balcony
B = 12" clearances to window or door that may be opened
D = 18" vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2
feet (60 cm) from the centre line of the terminal
E = 18" clearance to unventilated soffit
F = 9" clearance to outside corner
G = 6" clearance to inside corner
H = 4 ft. (U.S.A.) not to be installed above a gas meter/regulator assembly within H horizontally from the centre
line of the regulator
I = 3 ft. (U.S.A.) clearance to service regulator vent outlet
6 ft. (Canada)
J = 9" (U.S.A.) clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other
appliance
K = 3 ft. (U.S.A.) clearance to a mechanical air supply inlet
6 ft. (Canada)
* L = 7 ft. clearance above paved side-walk or a paved driveway located on public property
** M = 18" clearance under veranda, porch, deck or balcony
* a vent shall not terminate directly above a side-walk or paved driveway which is located between two single family
dwellings and serves both dwellings unless terminated 7ft above sidewalk.
** only permitted if veranda, porch, deck or balcony is fully open on a minimum of 2 sides beneath the floor.
note: local Codes or Regulations may require different clearances.
The flue terminal must be exposed to the external air and the position must allow the free passage of air across it at all
times. In certain weather conditions the terminal may emit a plume of steam. Avoid positioning the terminal where this
may cause a nuisance.
If the terminal is fitted less than 6.56 ft / 2 m above a surface to which people have access, the terminal must be protected
by a terminal guard.
The boiler is not suitable for external installation.
The boiler must be installed on a flat vertical wall which is capable of supporting the weight of the boiler.
The boiler may be installed in any room or internal space, although particular attention is drawn to the requirements of the
current electrical provisions with respect to the installation of the boiler in a room or internal space containing a bath or
shower. Where a room-sealed boiler is installed in a room containing a bath or shower, it must not be possible for a person
using the bath or shower to touch any electrical switch or boiler control utilising mains electricity.
The boiler may be installed in a cupboard or compartment, provided it is correctly designed and sufficiently ventilated for
that purpose.
The boiler is designed for use in a sealed central heating system.
refer to technical Data, section .8, for details of the heating system volume.
The system should be designed to operate with flow temperatures of up to 185 °F / 85°C. When designing the system,
the pump head, expansion vessel size, mean radiator temperature, etc. must all be taken into account. Refer to the pump
performance table for guidelines.
The boiler is supplied with the following components built in:
pressure relief valve - set to operate at 43 p.s.i. / 3 bar. The discharge pipe must be routed clear of the boiler to a drain,
in such a manner that it can be seen, but cannot cause injury to persons or property.
Manual operation of relief valve at least once a year.
WarnInG: 1. Avoid contact with not water coming/out
2. Prevent water demage
pressure gauge - to indicate the system pressure to be maintained.
expansion vessel - with a capacity of 2.2 gal / 10 l and pre-charged to a pressure of 7.25 p.s.i. / 0.5 bar.
By-pass - The boiler incorporates an automatic by-pass. However, where all radiators are fitted with thermostatic radiator
valves, an external by-pass must be fitted.
InstructIons pertaInInG to tHe Installer

Vent termination Minimum clearances

3.6 boiler location

3.7 central heating system - fig. 17
17
95.188.3 - GB