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10 INSTALLATION REQUIREMENTS
The boiler installation must be in compliance with relevant standards and Building
Regulations. See Section 4.2 of this manual.
10.1 General Requirements
10.1.1 Hearth
The boiler has a hearth temperature of between 50°C and 85°C and should be stood on a
rigid, non-porous, non-combustible base, which is not softened by warmth, to comply with
the Building Regulations.
10.1.2 Service Access
24” (600mm) Clearance should be provided above and in front of the boiler to allow for
routine servicing. Pumped, System and Combi models may require access to the top. This
is of particular relevance to appliances located beneath work surfaces. Such work surfaces
should be easily removable for service access.
10.1.3 Heating System
The heating system should be installed to current HVAC codes of practice. Before installing
the boiler the new or existing system must be thoroughly flushed to clear all sludge or other
foreign matter such as solder, steel wool and copper filings. The system must be cleansed,
neutralised and protected from corrosion in accordance with BS5449 and BS7593 using
suitable cleansing agent(s) and inhibitor(s) and carried out in accordance with the cleanser /
inhibitor manufacturers’ instructions. The system must be dosed to the concentrations
specified by the inhibitor manufacturer (refer to the Technical Data section of this manual
for the volume of the boiler when calculating the total system volume). Inhibitor
concentrations must be monitored and maintained on an ongoing basis. Failure of
components such as, but not limited to heat exchangers, condensing units, pumps, auto air
vents, pressure relief valves, and non-return valves due to corrosion products in the system
will not be covered by warranty.
10.1.4 Air Vents
The plastic plugs of the auto air vent(s) factory-fitted to the boiler must be loosened when
filling the system in order to bleed the air from the boiler. The plug should be tightened
again once filling is complete. In addition to any factory fitted air vents it is recommended
that another air vent is fitted at the highest point in the system. Where the flow pipework
drops down from the boiler the installer must ensure that an automatic air vent is fitted to
the top of the pipework to prevent air being trapped in the boiler.
On Boilerhouse HE models, the boiler MUST be fitted with an automatic air vent as shown
in Section 4.5.1. If an air vent is not fitted, air will accumulate in the secondary heat
exchanger and cause the boiler to malfunction. Failure to fit an air vent will invalidate ALL
warranties.
10.1.5 Drain Cock
For all appliances not factory-fitted with drain cocks, one should be fitted to the boiler drain
boss located to the left hand side of the burner. Drain cocks should also be fitted to the
lowest points in the system to allow the system to be completely drained.
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