Over the last weeks I have been doing some plumbing and also worked on electrical components apart from other things. I make progress but slowly, however I am still trying to get everything finished by the end of the year. I have my doubts though, because there are still many things to do with the commercial project but we would really like to get away after the Summer holidays and before the big heat.
The heater outlet in the living area. Originally I did not plan to use the Webasto hot water heat exchange heater units but I found them at a very good price in England and it looked to be the right thing at the time after I decided not to use diesel air heaters for the bulk of the heating. I actually decided not to use any diesel heating at this stage. I believe the hot water solar panels and the capacity of the hot water system are sufficient to drive the heater elements.
I made a mounting frame for the heater in the bedroom and glued to the rear wall. The distance to the outside wall was to small to fit the depth of the heater element. I did not plan to put the heater there in the first place otherwise I would have placed the wall further forward, but this turned out to be the better option than the one I had in mind before. The space in the bathroom where the other two heater elements are fitted is not big enough to take the third heater with all the fittings and valve. This is the reason I decided to put the bedroom heater on the right to the bed. Since the heater in the living area is supplied from the bedroom side and the hot water pipe is routed there anyway it was just logical to install the bed room heater at this spot and place the valve and the hose connections under the step.
The empty spot in the centre is going to be used for the control box for 12 motorised ball valves. The four heater valves will be connected to this box.
Below image shows the left step to the bed with the supply and return line for the heating circuit to the living area and bedroom.
Below is an early image of the hot water unit connected to the circulation pipes of the solar panels. On the right one can see two heater elements, onr for the bathroom and one for the working area.
Below one can see the hot water panel circulation pump and the non return isolation valve for the heater circuit.
Below image shows the plumbing for the hot and cold water inlet/outlets. I have installed a hot water circulation pipe with an on demand pump when hot water is needed at any outlet. The two valves in the picture are used for the heater elements. I also have installed several temperature sensors to monitor hot water and heater operation. I have pre and post temperatures for each heater element as well as the temperature of the hot water at each tap.
The image below shows the complete heating installation. The heater hoses are installed to the bath room heater and the work area heater. I also have a flow switch installed at the outlet of the hot water unit. This flow switch is used to verify the correct function of the circulation pump as well as the heater pump.
The bath room heater can be used without any of the other heaters when we need the bathroom as a dry room, but no other heating . I tried to make the installation as compact as possible but still have access to all the components. The installation is covered by the vanity cabinet once finished. There is only two pipes left to install, which is the hot water supply going out to to other taps and the vanity drain hose. The heating installation is complete though, at least the plumbing side. The electrical connection still needs to be done.