a/c question

bmf725

Well-Known Member
Yes I did install this unit. It works awesome. I can now run my mini split down past below 0. I cannot turn off my unit due to running a completely sealed room. Basically it modulates fan speed according to the temp sensor installed on the condenser. keeps the indoor unit from freezing up and keeps the oil and refrigerant from becoming sludge. It has gotten below freezing a few nights up here already and the A/C runs fine temps 12" below my 1000 watt are 77 degrees.
 

gladstoned

Well-Known Member
Anyone ever see these? Head pressure control http://www.pexsupply.com/ICM-Controls-ICM325HN-ICM325HN-Single-Phase-Head-Pressure-Control-120-480-VAC
from what I have read on the net you can use this to run your minisplit in below 0 temps. I just ordered one and will be installing it this week.
Did you end up adding this? can't we just turn the unit off if it hits below 5?
Yes I did install this unit. It works awesome. I can now run my mini split down past below 0. I cannot turn off my unit due to running a completely sealed room. Basically it modulates fan speed according to the temp sensor installed on the condenser. keeps the indoor unit from freezing up and keeps the oil and refrigerant from becoming sludge. It has gotten below freezing a few nights up here already and the A/C runs fine temps 12" below my 1000 watt are 77 degrees.
Just ordered one.
How is it installed? Will it be easy to mount to unit (outdoor unit, I assume) after mini-split is installed and operating? Is so I can wait for UPS to bring Head Pressure Control, no problem.
 

abe supercro

Well-Known Member
Yes I did install this unit. It works awesome. I can now run my mini split down past below 0. I cannot turn off my unit due to running a completely sealed room. Basically it modulates fan speed according to the temp sensor installed on the condenser. keeps the indoor unit from freezing up and keeps the oil and refrigerant from becoming sludge. It has gotten below freezing a few nights up here already and the A/C runs fine temps 12" below my 1000 watt are 77 degrees.
Thanks! I guess this is a reasonably priced add-on for "just in case" the few days it gets that cold down here. I'll probably pick this up too.
 

bmf725

Well-Known Member
Just ordered one.
How is it installed? Will it be easy to mount to unit (outdoor unit, I assume) after mini-split is installed and operating? Is so I can wait for UPS to bring Head Pressure Control, no problem.
Yes Gladstoned, very easy to install . However you will need to acquire a 24vac transformer 120 or 240v depending on your outdoor unit. you need this transformer to power the unit and the temp probe. mounting can be a bitch if you have tight quarters in the outdoor unit. I just surface mounted it in the compressor area the best I could. next you need to figure out if you have a ball bearing motor or sleeve bearing motor and set the dial according to the instructions. Mounting the temp probe is easy you simply push it in between the fins on the coil. I mounted mine near the OEM temp probe for best results.
 

gladstoned

Well-Known Member
Since I didn't understand much of what you just said I will call around on Monday and price install.
Honestly I can usually unbox everything and put shit together no problem. Every once in awhile, I unbox everything and fuck it all up also.
 

gladstoned

Well-Known Member
I apologize for not keeping this up to date. Wednesday is my install. It took awhile to get a contractor free to install an ac unit. People are wanting furnaces this time of year, apparently. Whatever.
 

gladstoned

Well-Known Member
I need it. I have a huge window unit down there, temps are not staying consistent. Shit isn't perfect, it will be though.
 

ThatGuy113

Well-Known Member
I'm lucking out my tiny basement window in the other part of the basement keeps everything around 75 sometimes 77.
 

bmf725

Well-Known Member
I am still running my Mini split unit 24/7 for about 2 months now to cool my veg/flower room. temps outside have dropped past 30 degrees with even a little snow and the unit runs fine with the head pressure controller. temps 18" below 3000 watts are 77-79 consistently. this is with the unit set at 74 I can turn it down to 64 and the temp will be 73 18" under the light so I do have a good bit of reserve btu power.
 

Kite High

Well-Known Member
Yes Gladstoned, very easy to install . However you will need to acquire a 24vac transformer 120 or 240v depending on your outdoor unit. you need this transformer to power the unit and the temp probe. mounting can be a bitch if you have tight quarters in the outdoor unit. I just surface mounted it in the compressor area the best I could. next you need to figure out if you have a ball bearing motor or sleeve bearing motor and set the dial according to the instructions. Mounting the temp probe is easy you simply push it in between the fins on the coil. I mounted mine near the OEM temp probe for best results.
and a how many watt 24vdc transformer? thanx
 

bmf725

Well-Known Member
I don't think transformers are rated in watts. But a 24vac transformer that is commonly found at the hardware store to power a thermostat and or a door bell dinger.
 

bmf725

Well-Known Member
I run the condensate line straight down from the indoor unit into one of my old hydro reservoirs witch is a 18 gallon Rubbermaid bin and I empty it about once a week. A condensate pump would be ideal but I had the reservoir and it didn't involve spending more money.
 

gladstoned

Well-Known Member
I run the condensate line straight down from the indoor unit into one of my old hydro reservoirs witch is a 18 gallon Rubbermaid bin and I empty it about once a week. A condensate pump would be ideal but I had the reservoir and it didn't involve spending more money.
I could run it to the drain, wanting shit to look perfect though. roflmao. Nobody will know but us. lol.
 

Rrog

Well-Known Member
Glad I came across this thread. I'm building a new facility next year with veg and flower room. In basement.Don't have it all figured out, but thinking of total 10'x15' room, sub-divided into veg and flower. This will all be built from scratch. Is there a MI person that designs rooms for a few $$?
 
Top