绝缘阁楼以获得更好的空气处理器性能
Hi Everyone,
大约4年前，我的家中安装了三菱超热系统。户外有一个冷凝器，楼下有两个墙壁装置和冷却，我的阁楼有一个管道处理器（可导管1.5吨）。
我的主要问题是,(83°F或相当炎热的天higher), the 2nd floor gets quite warm. The warm out of the ducts is 71°F until the weather gets really cool at night. On days where the outdoor temperature isn’t too hot, the air out of the ducts is quite cool (58°F). I will say that no matter the outdoor temperature, the wall units are great and put out really cold air and have no problem keeping everything cool and the air coming out of them is still quite cold. The outdoor unit doesn’t seem to be running continuously even on the hottest days.
目前，我的阁楼是无条件的，那时（130-140°F）真的很热。我怀疑这确实引起了问题。我猜我的问题是，这是合理的期望，如果我的阁楼afters喷雾泡沫隔热并卸下隔热材料以使我的阁楼成为条件的空间，那么阁楼中的管道单位应该能够保持正常？
Specs:
我的房子是〜2100平方英尺
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Replies
Not an expert, but it seems weird that the ducted portion of the system is not delivering cold air on hot days. (That's kind of its job, right?) Are these metal or flex ducts? Are they insulated? How large is the area this unit is serving?
Using spray foam will be expensive, and then you will need enough capacity in your system to deliver some conditioned air to the attic space.
What does your HVAC contractor have to say about this situation?
I like your plan so long as you understand your conditioned attic is likely to only be marginally better than the current situation. Mostly because the roof & gables you want to insulate may have twice the surface area of you ceiling getting the even code minimum R value become very extensive given the large area. If you did manage to keep the same R value when you move the thermal boundary the larger area means you will lose/ gain more heat.
What the current ceiling R value?
在我耳边，听起来您阁楼上的回流管非常漏水，并从阁楼上拉出热空气，并试图冷却并将空气运送到房屋中。查看您是否可以在空气温度进入并退出设备和空气温度时测量供应和返回烤架的空气温度。
您可能需要寻找某人用“管道爆破器”测试您的管道并修复泄漏。
沃尔塔
假设您的管道是绝缘且合理密封的，您可能会有类似的配置问题：
//m.etiketa4.com/question/multi-zone-mitsubishi-system-not-performing-with-all-zones-running
我的承包商在我的条件机械阁楼的after子之间安装了紧身的polyiso板，该机械阁楼容纳了我的热泵空气处理器，然后1级干墙在其上。
到目前为止，在90F+天的热阁楼中，阁楼保持在80年代，空气处理程序（也是高度绝缘的）和其中包含的挠性管道设法在各地带来了凉爽的空气。
据我了解，从许多角度来看，Polyiso比喷雾泡沫要好，包括成本，有毒的瓦解和较低的GWP。安装程序使用简单的工具（例如面包刀）将其切割和安装。
Wow really great responses! I called one of the Mitsubishi Diamond Elite contractors and they seemed pretty useless, frankly. He told me that having a 3 ton condenser outside and a 1.5 ton air handler in the attic makes no sense and that the indoor unit should always exceed outdoor unit. Regardless I'll follow up on these suggestions and on the next hot day (should happen within the next week) I'll try the following:
1）关闭所有墙壁单元，仅保留空气处理程序，以查看我是否与Akos相同的问题（也许是制冷剂或不当配置）。
2）尝试检查申报表以查看是否有泄漏。我非常业余的计划是在阁楼的返回线上喷一些古龙水，并请我的妻子看看她是否闻到了其中一个供应通风口的气味。
3）所有其他都失败了，请尝试按Akos链接所建议的更改配置项。
也许简单的图可以帮助我们中的一些人了解阁楼管道位置或配置。
如果阁楼管道位于阁楼的地板上，为什么不使这些管道脱落，而不是试图隔离和调节整个阁楼空间呢？如果它们在阁楼上挂高，可以将它们转移到阁楼地板上，而不是放在阁楼隔热层之上？
Just wanted to leave a note that I read the thread that Akos linked to and I suspect I have a similar issue. Usually when it is > 83°F outside, my upstairs can't maintain setpoint. However on Sunday when it was 89°F, I turned off everything except my ducted air handler and I replicated the exact same results; the unit performed great when the other units were off, the air vents coming out of the air handler were quite cold (57°F) and were able to keep the upstairs really cool. I also just changed the setting as mentioned in that post (SW6-7, SW6-8, Target ETm(°C) = 6). Its not super hot today, but I will post back once another hot day occurs to see whether it now works even with the downstairs ductless units are on.
我只是想发布一个答复，因为上周我们在马萨诸塞州的90年代中期至90年代已经有5天的时间。在我之前提到的设置更改之后，从管道中发出的空气仍然相当酷。我没有测量输出温度，但是在设置更改之前，我的楼上将达到〜78°F，直到深夜才开始冷却。现在，管道散发出相当数量的冷空气，达到的最高温度为〜74°F，它在傍晚开始冷却，并在晚上8点左右的设定点（72）左右进行冷却，这很棒。
So if anyone else has a ducted Mitsubishi air handler in the attic and it does a terrible job on warm days, change the setting on the outdoor unit (SW6-7, SW6-8, Target ETm(°C) = 6)