Phillip Posted July 23, 2011 Report Share Posted July 23, 2011 Here is where I did a little HVAC upgrade on one of the girlsââ¬â¢ house on the university here. Not as grand as Darrenââ¬â¢s project. I wish I had took photos before I started tearing out the fan coils We tore out 26 fan coils for the second and third floor. The second floor coils was above the ceiling and the third floor coils was in the attic We installed 22 new fan coils and 4 one-ton Mitsubishi Heat pumps for the sleeping porches. The 4 units work off one exterior unit. Here are some shouts of the Mitsubishi Heat pumps Click to Enlarge 81.01 KB in attic Click to Enlarge 73.02 KB Second floor sleeping porch Click to Enlarge 33.33 KB Click to Enlarge 44.45 KB We replaced the old water chiller with and new 10-ton chiller. Click to Enlarge 65.06 KB Click to Enlarge 53.2 KB What made this bad was the fan coil unit that they wanted us to use would take 8 weeks to get here so we had to order some fan coils that where larger to get them there in two weeks It is fun installing fan coil units thatââ¬â¢s 6 inches wider than the one that was there to start with above the ceiling in the hallways We had to move the control boxes to the side the coil hookup where on so we could have some room to pipe the chill water to the coils. 4 of the coils we had to mount the control boxes to the walls and had to pipe the control vales for the water away from the coils not next to them as they are installed most of the time. Here are some photos of the fan coils above the ceiling. Click to Enlarge 58.67 KB Click to Enlarge 46.93 KB Click to Enlarge 57.84 KB Click to Enlarge 51.59 KB Click to Enlarge 63.5 KB Here are some of the fan coils in the attic. Click to Enlarge 74.25 KB Click to Enlarge 69.48 KB Click to Enlarge 65.34 KB Click to Enlarge 68.46 KB Click to Enlarge 69.42 KB We also replaced an exhaust fan for the bathrooms in the attic. Click to Enlarge 66.26 KB These are shots of other items in the attic. Click to Enlarge 57.41 KB Also we added a 5 ton heat pump for added cooling in the dining and living room. It has a damper set up where they can have the unit blowing in both rooms or just one of the rooms. Click to Enlarge 44.23 KB Click to Enlarge 89.73 KB Click to Enlarge 43.03 KB The door facing had to be removed to get the unit in. In the basement we added a small Mitsubishi heat pump for the computer room. Click to Enlarge 63.12 KB Click to Enlarge 32.59 KB Click to Enlarge 34.73 KB Quote Link to comment Share on other sites More sharing options...
Marc Posted July 23, 2011 Report Share Posted July 23, 2011 Any idea what those secondary drain pans beneath the attic fan coils would weigh if they filled with water? Marc Quote Link to comment Share on other sites More sharing options...
Phillip Posted July 24, 2011 Author Report Share Posted July 24, 2011 Any idea what those secondary drain pans beneath the attic fan coils would weigh if they filled with water? Marc Marc Most of them are 40" X 30" X 2" if you want to do the math. Thats why there are suppose to be sloped to the float switch. Quote Link to comment Share on other sites More sharing options...
Marc Posted July 24, 2011 Report Share Posted July 24, 2011 89 Lbs, level full. Not as much as I thought it'd be. Just wondered if there'd be a failure of the strapping or something other if water were to fill the pan. That's nice looking workmanship Phillip. Marc Quote Link to comment Share on other sites More sharing options...
John Kogel Posted July 24, 2011 Report Share Posted July 24, 2011 I have a question about the Mitsubishi heat pumps, such as the one in the computer room. The principle is that one outdoor unit, larger than that one, supplies up to 4 indoor units, each in a different room so no ductwork is needed. Each unit has its own remote control. I've only run into one so far, but I expect to see more. Can the unit supply heat to one room while supplying cool air to another? Somehow I don't think so. Are there any stumbling blocks to installing the indoor units, re: routing the refrigerant lines? Is the electrical supply to the room units just tapped off of a general lighting circuit? Quote Link to comment Share on other sites More sharing options...
gpdewitt Posted July 24, 2011 Report Share Posted July 24, 2011 I installed one of the small heat pumps at my daughters' house a couple months ago. It required a new 240V line, and one 2" hole through the wall behind the indoor unit to run the lines including condensate drain and, surprisingly, 18AWG wires to run the inside fan from the outside unit. No electricity required from inside the house. Outdoor unit had to be within 25' of indoor unit. Very quiet and efficient. We're thinking about adding another slightly larger unit on the other side of the house for the other 2 bedrooms. Slab house, 50's, 2 separated attics and we don't want to run duct on the roof. Quote Link to comment Share on other sites More sharing options...
Phillip Posted July 25, 2011 Author Report Share Posted July 25, 2011 I have a question about the Mitsubishi heat pumps, such as the one in the computer room. The principle is that one outdoor unit, larger than that one, supplies up to 4 indoor units, each in a different room so no ductwork is needed. Each unit has its own remote control. I've only run into one so far, but I expect to see more. Can the unit supply heat to one room while supplying cool air to another? Somehow I don't think so. Are there any stumbling blocks to installing the indoor units, re: routing the refrigerant lines? Is the electrical supply to the room units just tapped off of a general lighting circuit? There is different types of set ups for this type unit. The single unit in the basement has the power that come from the outside unit. Each unit on the 4 inside units have their own power supply. The set up we are using at this job is that the unit on the second floor has one controller and the third floor has an controller. One floor can call for cooling and the other floor can call for heat at the same time. There are set up that can have 20 or more unit on one outside unit. Each unit can get cooling or heat when it wants it. The key to this in the controls and the switch set up. Quote Link to comment Share on other sites More sharing options...
Phillip Posted July 25, 2011 Author Report Share Posted July 25, 2011 The line set for these units where 1/4 " and 3/8". Longer runs will be bigger. Running them is not too bad. we used soft copper on 50' rolls to make are runs. Each unit should have it own power source. Quote Link to comment Share on other sites More sharing options...
Phillip Posted July 25, 2011 Author Report Share Posted July 25, 2011 That's nice looking workmanship Phillip. Marc Marc, Thanks, I had some good help Quote Link to comment Share on other sites More sharing options...
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