I have a two-speed motor on my swamp cooler. It, and the pump, are controlled by three switches in my hall closet. One switch controls the pump (works fine). One switch powers the fan (works fine). One switch toggles the fan from low to high speed - this switch doesn't work. It turns the fan off instead of changing it to low speed (fan always runs on high speed or not at all right now). I recently replaced all the switches because they were very old and one of them simply gave out, but I put the wires on the new switches in the exact places as they were originally (when it worked). Is there a special type of switch that toggles instead of cutting off current (it just has a regular old light switch on it)?
While I'm obviously no pro, I've done a lot of DIY wiring and never had a conundrum like this. I've got the idea that there coming in there is a neutral/white and a hot/black and going out there is a neutral/white, hot/black for the pump, high/black for the fan, and low/red for the fan. Does anyone have a wiring diagram for this situation?
The first switch is for pump power and is a regular single pole switch.
The second switch is for the fan power and is a regular single pole switch.
The third switch is for high/low and is a regular three way switch.
Power is fed in on the dark screw terminal and out on the other two brass terminals.
After wiring... if fan speed works in reverse.... flip the switch over.
The switch for the low or high speed of the fan motor requires a single pole double throw 3 terminal arrangement (common, closed, open). This switch must have current and voltage ratings equal or greater than those on the motor. Switched line voltage from the motor on/off switch connects to the common terminal, low speed motor wire to the closed terminal and high speed motor wire to the open terminal. None of your switches should involve the neutral wire. I didn't refer to your wire colors as I was not sure what you meant when you stated "I got the idea ....".
Thanks for these responses!! They've answered my questions and all I have to do now is implement the answers. I'll probably do it next weekend. If so, I'll post some pics!
Thanks again.
If I want to reduce moisture in a small room (say about 125 sqft or volume wise, about 833 cuft) to a max of 35% to 37% relative humidity, would a small size dehumidifier (similar to this:[url=https://www.amazon.com/Schmitt-Dehumidifier-Water-Ultra-Quiet/dp/B083Y74YVV/ref=sr_1_6?crid=1FLXYZW7CP1JH&keywords=small+size+dehumidifiers&qid=1658602928&sprefix=%2Caps%2C789&sr=8-6]Amazon.com - Pohl Schmitt Electric Dehumidifiers for Home, 2200 Cubic Feet (225 sq ft) Portable Compact 17 oz Capacity Mini Quiet Dehumidifier for Bedroom, Bathroom, RV, Laundry Room or Closet -[/url])
Or use an evaporator (similar to this: [url=https://www.amazon.com/Pignr-Conditioner-Evaporative-70%C2%B0Oscillating-Humidification/dp/B09T6Q6HVL/ref=sr_1_21?crid=1UYM3VWDI2R8X&keywords=evaporative+air+cooler+for+small+room&qid=1658603099&sprefix=evaporative+air+cooler+for+small+room%2Caps%2C86&sr=8-21]Amazon.com: Pignr Portable Air Conditioner, Evaporative Air Cooler with 4 Speeds Gradient Color Light & 70°Oscillating Function, 2 Humidification Capacity 600ml, 2-6 H Timing, room, home, office, White : Home & Kitchen[/url])
To me an evaporator (also called swamp cooler) is nothing more than an air conditioner without a chemical circulationg pump. But it must be able to deposit the moist vapor someplace to keep the humidity down.
The reason for the inquiry is that I'm storing 3D printing filament which is very hydroscopic. And yes I'm using vac bags and dessicants, but I'm also looking for room comfort and minimum noise level. House is central A/C but this is an upstairs room.Read More
Installed in 2006 as replacement for 1989 system:
[u]Carrier Heat Pump[/u]: Model: 25HBR336; 3 ton
[u]Carrier Fan Coil/Air Handler[/u]: Model: FK4DNF003 000AAAA; 5 KW Heat
[b]Can anyone advise me as to how I can calculate the optimum size of the RETURN Plenum located immediately below the Air Handler?[/b]
I've search online and browsed a number of books, but I can't find any pertinent data on determining the optimum size of the Return Plenum box. It seems to me that this size may be important...
The ORIGINAL Return Plenum was composed of Duct board. Depth of this box (as viewed from the front) matched the depth of the AH base; Width was equal to the distance from the Left Hand side of the AH to the RH side of the Return Duct (descending from the ceiling); and Height was the distance from the concrete slab floor to the bottom of the AH and Return Duct. Two rectangular holes were cut in the top for the AH intake, and the Return Duct. The Return Plenums in my previous dwellings were about [i]half the size of this one[/i]. IMO, the size of [u]this[/u] Plenum was apparently calculated for ease of, and speed of installation...
I'd like to replace the duct board box with a smaller [i]steel[/i] Plenum. Steel is preferred due to previous leakage issues, and even more because of the heavily dust-encrusted and delaminated duct board that I removed. Another semi-issue is that the copper tubing and PVC drain line passed through the duct board box in the original installation. Even with the metal box I'd prefer to avoid possible sweating or leakage issues into the Plenum. Coolant leakage has never been detected, but given the 34 year age of the copper tubing I probably should replace it anyway.
The [i]attached diagram[/i] depicts the dims of the currently installed equipment (gray), the original plenum is outlined in red, the NEW Duct Transition is yellow, and my proposed Return Plenum is green. I can keep the original dims of the box if I replace and relocate the copper tubing and condensation drain pipe, but this would double the cost of the steel for the plenum box. The volume of the [i]original[/i] Supply Plenum is [b]11.7 cu. ft.[/b] and the volume of my proposed Plenum replacement (Return Duct Transition volume is not included) is [b]6.35 cu. ft[/b].
[img]https://cimg6.ibsrv.net/gimg/www.doityourselft.com-vbulletin/594x612/return_plenum_new_dims_105d_small_2_5ca7b65d1597471376ab78a8b6a6fc1fd9da2bae.jpg[/img]
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09-06-22, 02:29 PM
