About boiler maintenance problems

In spring, without heating, we must let the water in the heating go out and inject new water.
1. Open the water inlet switch and close it when the pressure is added to 2 (pressure should not exceed 3);
2, open the last set of radiator valve, a strange smell "old water" will be sprayed out;
3, and other "old water" is not when the spray or flow out, close the air valve, the second time to open the water switch pressure to 2 or 3;
4、Repeat N times of water discharge and add water to your own satisfaction;
5. After the decision not to rinse repeatedly, the last pressurization should not exceed 1.5 (max. 2).
In autumn and winter, rinse and change the water again, but the pressure must not exceed 1.5. When the pressure is too high, the last set of radiator valve can be opened and some water can be released.

Heating switch

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