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5.3 Gas Installation
1) The whole of the gas installation, including the meter, should be inspected and tested for
soundness and purged in accordance with the current regulations and recommendations.
Whilst affecting the gas soundness test and purging air from the gas installation to a safe
.
location, extinguish naked lights and do not smoke.
5.4 Filling the central heating circuit.
1) The instructions below relate to open vented systems, for sealed systems refer to the
sealed system manufacturing instructions
2) Ensure that all system valves are open.
3) Fill and vent the system and product. An air vent is fitted to the supplementary heat
exchanger flow pipe. Use the vent hose enclosed appliance package.
WHEN VENTING THE PRODUCT USING THE AIR VENT ON SUPPLEMENTARY HEAT EXHANGE
ENSURE THAT SUITABLE CARE IS TAKEN SO THAT WATER DOES NOT FALL ONTO THE
PRODUCT OR CONTROLS.
4) Check for water soundness.
5) Initial system flush ('cold'). The whole of the heating system must be flushed out at
least twice: once cold, and once hot.
6) Open all radiator or heating valves and the boiler CH service valves and drain the
heating system and boiler completely from the lowest points of the system via drain taps
(opened full bore to remove any installation debris prior to lighting the boiler).
7) Refill the heating system
Navien stirling engine m-CHP installation manual
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