ᐅ Multi-utility supply line – Can the gas connection be used for the air conditioning system?
Created on: 20 Jul 2021 17:00
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Reltaw2021
Dear forum members,
I would like to prepare my house, which is going to be built, for a split air conditioning system. A four-way utility conduit is planned to lead into the utility room. Since we will not be using gas, I am asking if it is allowed to use the last available opening for the air conditioning—either for the smaller refrigerant line or the larger vapor line (I hope I understood the cycle correctly :rolleyes 🙂. According to my calculations, I would only need to leave one additional smaller hole through the basement exterior wall.
Because this is a prefabricated house, the manufacturer is reluctant to compromise the building’s thermal envelope by running empty conduits to the outside if they are meant for condensate drainage (upper and ground floors). Perhaps someone has experience or advice on this? As far as I understand, you can hardly run condensate water through shafts reaching down to the basement, can you? Would it then have to drip into a sink or similar?
Thanks for your input,
Reltaw
I would like to prepare my house, which is going to be built, for a split air conditioning system. A four-way utility conduit is planned to lead into the utility room. Since we will not be using gas, I am asking if it is allowed to use the last available opening for the air conditioning—either for the smaller refrigerant line or the larger vapor line (I hope I understood the cycle correctly :rolleyes 🙂. According to my calculations, I would only need to leave one additional smaller hole through the basement exterior wall.
Because this is a prefabricated house, the manufacturer is reluctant to compromise the building’s thermal envelope by running empty conduits to the outside if they are meant for condensate drainage (upper and ground floors). Perhaps someone has experience or advice on this? As far as I understand, you can hardly run condensate water through shafts reaching down to the basement, can you? Would it then have to drip into a sink or similar?
Thanks for your input,
Reltaw
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Strahleman20 Jul 2021 23:11Mycraft schrieb:
DN25 is already tight, but both copper pipes including insulation should fit through.In our case, the refrigerant pipes including insulation are each 3cm (1.2 inches) in diameter, so they definitely won’t fit together through such a small opening. However, it might be possible to run the power cables for the indoor units through the multi-service penetration (MSP) to the outdoor unit, as well as the power cable for the outdoor unit itself.Reltaw2021 schrieb:
I get the impression that utility providers rely on relatively strict regulations.That’s correct. If you want to route your own cables through the MSP, you need to clarify this with the utility provider. Some municipal utilities do not allow any “third-party cables” in the MSP.But what’s the fuss about the thermal envelope? An exhaust vent, a chimney, or a controlled ventilation system all break the thermal envelope in their own ways, and nobody worries about that.
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Reltaw202121 Jul 2021 06:57Strahleman schrieb:
1.
There are utility companies that do not allow "third-party lines" in the main distribution cabinet (MDC).
2.
But what’s all the fuss about the thermal envelope? An exhaust hood, a chimney, or a controlled ventilation system also penetrate the thermal envelope in their own ways, and nobody worries about that. Regarding point 1:
It would be very convenient to only need one trench running from the basement to the outside. However, for air conditioning systems you don’t have to dig that deep anyway, as there are also above-ground pipes or lines available, right?
2. Yes, all that fuss is annoying. But I was categorically denied even a single exhaust opening at one point. I’m a bit more relaxed about it now because the energy consultant (from the same company) explained to me, bypassing the project manager, that it doesn’t matter. The opening is already planned there. But it does make a difference whether it’s about the Renewable Energy Act subsidy or the warranty or guarantee from the house manufacturer for the house itself. The basement is being built by myself.
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Reltaw202121 Jul 2021 07:00It would be interesting to hear from people with timber frame construction, which includes us, how they remove the condensation water from the indoor units.
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motorradsilke21 Jul 2021 08:04Strahleman schrieb:
In our case, the refrigerant lines including insulation are each 3cm (1.2 inches) in diameter, so you can’t push them together through something as narrow as a drinking straw. However, it might be possible to route the power cables for the indoor units through the multi-utility entry system (MUE) to the outdoor unit, including the power cable for the outdoor unit itself.
That’s correct. If you want to pull your own cables through the MUE, you need to check with the utility provider. Some municipal utilities do not allow “third-party cables” in the MUE.
Provided you live in an area where there is ONE utility provider supplying everything from a single source. I have only seen situations like this described here in the forum for the first time; where I am, each service has its own supplier. Otherwise, just install according to the local utility company’s regulations;).
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