Radiant RK 100, Инструкция по эксплуатации

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INSTRUCTIONS FOR THE FIRST TIME IN SERVICE
RK 100 - RAD - ING - MAN.INST - 1311.1 - DIGITECH CS MIAH4
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4.3 Filling the system
4.3.1 General warnings
Check the properties of the water supply and install the appropriate treatment devices if the mains
water has a hardness rating more than 15°F i
n
order to prevent scaling and eventual damage to the
D.H.W heat exchanger.
Use only clean tap water to fill the system.
If the system is filled with frost protection chemical agents, the installation of a hydraulic compensator
is necessary to separate the central heating circuit from the domestic hot water circuit.
Once the water pipes have been connected, Before switching the power supply ON, close the gas feed valve
and fill the system as follows:

Check that the circulating pump runs freely;

Check that the plug of the air vent valve has been slackened slightly to allow air to escape from the system;

Close the draining tap and open the external filling loop valve. Use a pressure gauge to check that the system
pressure reaches 1.2 ÷ 1.5 bar.

make sure that the external filling loop valve is perfectly closed.

Unscrew the plug on the pump to remove any trapped air, check that the pump is free then re-tighten it when
water starts to flow out.

Open the air vents on the radiators and monitor the air evacuation process. When water starts to flow out of the
radiators, close the air vents.

If, after the above operations, there is a pressure reduction, re-open the external filling loop valve until the
pressure gauge reaches 1.2 ÷ 1.5 bar.

On completion, make sure that the filling loop is turned off ;