16
INSTALLATION
System Makeup
Provision can be made by pre-pressurisation of the system via a temporary hose connection and through a double check valve
(non-return) and stop valve. Supplied
There must be no permanent connection to the mains water valve supply even through a non-return valve.
Maximum Cold Water inlet pressure not to exceed 6 bar.
Inhibitor
If using an existing system take care to drain down the entire system including the radiators, then thoroughly clean out before
fitting the boiler. Attention is drawn to the current issue of BS5449 and BS7593 on the use of inhibitors in central heating
systems.
Magnetic Boiler Filter
To be fitted in the return pipe work close to the boiler. Failure to do so will invalidate the warranty.
Scale Inhibitor
The Aztec Maxi Combination boiler MUST be fitted with an inline scale inhibitor (not supplied) on the cold feed inlet pipe.
Failure to do so will invalidate the warranty.
Pump Setting
The boiler is fitted with a Grundfos UPM3 Flex AS circulator
To avoid any primary water flow issues, it is important to commission the pump to the correct setting to suit the system.
Pressing the > button will change the pump performance as per the chart below.
Alarms
Summary of Contents for Aztec Classic WM Maxi Combi
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