Charging And Troubleshooting Air Conditioning In Low Ambient Conditions
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- เผยแพร่เมื่อ 24 ม.ค. 2021
- When charging or troubleshooting air conditioning systems in low ambient conditions, it is important to understand the concept and methods of doing so. Check out this quick podcast on the subject anchor.fm/hvacknowitall/episo.... In the video, an ICM condenser fan speed control was used with a thermistor. I had to troubleshoot and determine the best place for the thermistor positioning. Once the position was determined, the charge was adjusted to ensure optimal performance in low load conditions.
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#lowambientkitinstallation #lowambientairconditioning #lowambientcharging - ยานยนต์และพาหนะ
Love AC in the winter time 😆
Hey...The refrigerant that you added ...will it affect the system in summer time or when the ambient temperature rises?
Watching from Papua New Guinea...
Never had to install one but now I'm fully infromed👊
Well laid out video and explained in full detail👍👍. Good job!
Thank you!
Great video! Thank you
Great tip💯💯💯💯
Great content. Thank you for posting.
1. The temperature-pressure relationship on which the operation of this regulator is based is only valid for mixture of gas + liquid. The location of te probe should be close to the end of condenser where no hot gas/superheated vapour can exist. Putting the sensor on the liquid side of the condenser should not cause problems, maybe raise the pressure lightly.
2. The sensor should not be affected by (temperature of) the air. Blocking air flow around it with e.g. some sillicone sealant could be a good idea.
3. The fan should not spin below 70F measured by the sensor but it looks like it did spin. Have you checked that the fan stops at 70F by putting the sensor to 70F and below?
4. It would be a good idea to disconnect the fan manually and check pressures as a first step to confirm that the controller can actually do its job.
5. Obviously, the 'heat-pump jumper" was set correctly.
Yes fan stops. Sensor position final location was in the coil out the outlet. The controller didn't perform well with the sensor on the liquid line and insulated on 3 different units.
We also rig units were I work with a cut in cut out pressure switch wired through a relay to achieve the similar outcome for low ambient conditions
thanks for sharing
My pleasure
I Installed this on a Trane 20 ton condenser and both of my motors over heated after 40 mins of run time. Spoke with tech support and confirmed that it was set up correctly. Was told that with that model unit I’d have to upgrade both the motors, add heat sinks, and rain guards.
Was the motors that burnt out ball bearing?
@@HVACKnowItAll yes. According to tech support they were ball bearing. They still worked after the cooled off.
Same issue I had today except on a rtu. Carrier.
Good video! Do you have any videos on wiring diagrams for walk-in coolers and/or freezers
I dont no longer sorry
For me just so I know it works and I don't want to be called back ICM makes a transducer that can be installed on the discharge .
icm head pressure control does not come with the wire that connect the line 1 to the line 1 terminal. what kind of wire use to connect line 1 to the line 1 terminal?
Does this ambient control kit need other accessories Such as a hard start kit or anything else? And does it matter if its a txv or piston coil?
Hard starts for locked up compressors or low voltage situations. Not needed in low ambient conditions. You'll need a crankcase heater for sure and possibly wind baffles.
never have good luck with those fan cycling, always find issues with them. I use the one that sense pressure not temperature
Pressure sensing is the only way to go, never been a fan of temp sensing for low ambiant control or fan cycling, pressure never lies.
Hey man hope everything is ok I am always watching your videos,I worked on a carrier motormaster low ambient control today same scenario,it’s tricky to set the right evaporating temperature right due to condenser fan constantly speeding up and down some times you will run under 32° evaporating temperature for seconds and it will go back up,specially if there is low load inside the room,you can correct me if I am wrong I know you have much more experience then me too
Yes difficult to set up for sure, it'd much easier if it was fan speed instead of fan cycle
@@HVACKnowItAll I agreed now due to is temperature outside bypassing the condenser fan won’t work either thanks for replying my message
Can you go off of sub cooling at such a low temp?
If the fan speed is maintaining 100⁰f why not
That's why we don't use fan control in refrigeration system it shows the different by using a fan control txv doesn't get liquid like a head master control.
Yes ORD and ORIs work great
Now whats that sleeve bearing and ball bearing ?
Ball, I explained that in the video
What do you mean condenser froze up? Was it in heat mode?
The suction line freezing and the compressor.
Air conditioning in winter time call the ambient conditions go down to Goodwill or a thrift shop and pick up a six man or eight man tent cut the bottom out set up a tent it’ll be nice and 90° in there and you could set your sub cooling and superheat as if it was summertime in Florida
Are use a pressure switch I don’t like the thermistor
I prefer pressure action on low ambient controls. I always add a freeze stat to the evaporator as well. I’ve also found TXV with a hard start kit for better in low ambient control. Depends on what the customer will pay for. Good video. Thanks and stay safe.
I've never had good luck with these controls
I use a fan cycle switch myself. Tried and true. I’ve used them for over 40 years.
fan cycle switch
They work too, but a lot of pressure fluctuations. Fan speed works much better.
York socks last time I called tech support it took 30 minutes
They answered my call right away but yes sometimes wait times can be long.
Those icm controls are junk, never last very long
Time will tell