1. As shown in the picture, generally the upper row is the water inlet valve, and the lower row is the water outlet valve. We can ignore the water outlet valve here because some do not have a single-pipe water outlet valve at all. , now we only need to control the valves 1234567 to complete the water discharge operation. The following figure shall prevail for each step of the operation.
2. Put it in all the way, close valves 2, 3, 4, and 5, close valve 7, and connect a suitable pipe to the drain valve 2 (some have faucets here). For the sewer, open the water valve 2 or the faucet at this time, so that the released water will be in pipe 1 until clean water is released.
3. Put the second line, close the valve 1 just now, open the valve 2, and then the water in the pipe 2 can be discharged. The next few lines can be filled with clean water in order to complete the water discharge.
4. After draining the water from each channel, the pipes have been basically cleaned and the air trapped in the middle has been released. At this time, you can open valves 1, 2, 3, 4, 5, and 7, and Close the air release valve 2 or the faucet.
5. The deflation method is very simple. Just open the deflation valves 1 and 2 respectively to deflate until water flows out. It is recommended to let the air out once after draining the water, and then let it out again after an hour or two to see if there is any air.
Notes:
1. Set up manual or automatic exhaust valves. Manual or automatic exhaust valves should be installed on the water distributor and water collector. Try to install an automatic air release valve to bring convenience to users during future use and avoid air collection caused by factors such as hot and cold pressure differences and water replenishment, which will hinder the operation of the system.
2. A bypass pipe should be installed between the main water inlet pipe of the water distributor and the main water outlet pipe of the water collector, and a valve should be installed on the bypass pipe. The connection position of the bypass pipe should be between the beginning of the main water inlet pipe (before the valve) and the end of the main water outlet pipe (after the valve) to ensure that water does not flow into the heating pipe when the heating pipeline system is flushed.
3. On the water supply connection pipe before the water distributor, valves, filters and drain pipes should be installed in the direction of water flow. Two valves are set up before the water distributor, mainly for closing when cleaning the filter and replacing or repairing the thermal metering device; the filter is set up to prevent impurities from clogging the flow meter and heating pipe.
4. The water inlet and outlet of each loop heating pipe should be connected to the water distributor and water collector respectively. The inner diameter of the water distributor and water collector should not be smaller than the inner diameter of the main supply and return pipes, and the maximum cross-sectional flow velocity of the water distributor and water collector should not be greater than 0.8m/s. Each water distributor and water collector branch loop should not have more than 8 channels.
Too many loops will cause the pipes at the sub-collector to be too dense, which is not conducive to installation. Each branch loop water supply and return pipe should be equipped with shut-off valves such as copper ball valves.