18
0
62
5
4.6 MOUNTING BRACKET
Mark the hole positions using the wall bracket as a template per the diagram.
Fit bracket securely onto wall before lifting appliance into position. Drill the holes and fit the bracket ensuring it is
level using suitable high strength screws, with appropriate plugs or fixings, minimum M10 size.
Always use assistance if required. Wear suitable cut resistant gloves when handling the appliance. Ensure safe lifting
techniques are used. Do not lift the appliance by attached pipe-work or components. When lifting the boiler
ensure that the fixing elements and the wall have a sufficient load-bearing capacity. Check the quality of the wall.
4.7 WATER CONNECTIONS
CAUTION: The hydraulic connections must be carried out respecting the flow and return marked on the
boiler.
CAUTION: When tightening or loosening threaded connections, always use suitable tools as open-end
spanners. Do not use pipe wrenches, extensions or unsuitable tools that may cause damage or water leaks.
Install purges in the radiators and high points of the installation.
Heating Flow & Return
These connections are ¾ “ for connection to 22mm pipe. Service valves should be installed at this position to
allow the boiler to be isolated for maintenance without the need to drain the entire system. The valves should be
of sufficiently large bore so not to restrict the heating circulation.
Single pipe heating systems are not recommended only a twin-pipe heating system should be used.
Drain Point
A drain point should be fitted at the lowest point of the system. It is not acceptable to drain the boiler through the
safety valve as debris and deposits will prevent correct operation of the valve.
Heating System By-pass
The heating water flow switch requires a minimum flow rate through the boiler of 7 L per minute for correct
operation. Systems fitted throughout with Thermostatic Radiator Valves will require provision of a System By-pass
to maintain sufficient flow should all the valves be closed. (see 7.3 HEATING SYSTEM FLOW SWITCH – E3
ERROR).
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Summary of Contents for MATTIRA MAS15
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