How does the water valve setting affect the head and suction pressure on the water source heat pump
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- čas přidán 29. 08. 2024
- This one covers changing head pressure by changing the setting of the water valve. On the fixed orifice device air conditioner, changing head pressure changes both suction pressure and superheat. This demonstration shows the changes very well and is a good illustration of this property. This video is part of the heating and cooling series of training videos made to accompany my websites: www.graycoolingman.com and www.grayfurnaceman.com to pass on what I have learned in many years of service and repair. If you have suggestions or comments they are welcome.
If you are a homeowner looking to repair your own appliance, understand that the voltages can be lethal, the fuels are highly flammable and high pressures are used. Know your limits.
THANKS from Florida....
I pray to God you are/ we're an instructor..love all your videos and explanations...right to to my question" thanks a lot for all your videos
27 years as a tech, then 9 as an instructor. Now retired.
GFM
Very good training video. I work on water source hp's just about everyday. We have old Ener Con hp's that are 40 years old and still work fine. We replace them with new r410 heat pumps and they seem to be nothing but problems. The heat pumps were I am at use a supply and return loop with cooling tower in summer and a steam to water heat exchanger in winter. The only equipment with head pressure regulators are the ice machines. Never new the head pressure controls the superheat like that with a cap tube system. I guess if the head pressure could be raised high enough you could get 0 superheat. lol
I know how much time you had to put into this to get this video done, so thanks! Great job!
Welcome
GFM
Fantastic, this will really help with xray chiller work
I notice newer unit have bigger evap coils with more surface area causing suction pressure to be a little higher great video
acechoice45 The coil sizes have increased massively as an energy efficiency move. However, some of the latest have reduced coil sizes, using things like motor efficiency to reach efficiency goals.
GFM
Excellent job, enjoyed watching and learning
Thank you so much ! I’ve learned a lot . I am a property supervisor and my apt units have these type of water source heat pump’s. Now I do have a question how do you unclog a water source heat pump?
If the clog is in the heat exchanger you are in trouble. You can use a limescale remover, but you may end up with a hole in the heat exchanger which pretty much will destroy the unit.
GFM
thanks for sharing your expertise...
The house i work on has the Griswold pre- set for water flow closed loop most of the units have the txv . Unit size 7k btu to 36k some are 24 yrs old
I really like your video series and experiment, keep them coming!
I was wondering if you could do a video on how to clean the combustion chamber of an oil fired water heater for domestic hot water heating ? (like the Brock IB32-R-A)
Thank you.
That was very interesting. But I'm just wondering how you charged the system if the amount of water is different. I'm use to air cooler fan. If ever you could give a fast explanation of how you did, I would appreciate. Thanks
very nice brother
Welcome
GFM
They have icee machines that have the water cooled cond. They work just about the same but different refrg. and the evap or freeze chamber would run about 29 degrees
Graham Proctor Many areas won't allow water cooled anymore because of the water usage. Heat pumps like this one are usually only used on well systems or with in ground geothermal systems.
GFM
Thank you for the great video content,,,,Could you kindly tell me what the effect would be on the water side if this machine was running in heat mode,,, Also how would this machine respond in heat mode if it had a TXV and you increased the supply water flow and/or the water temperature? Many thanks in advance
In heat mode the unit picks up heat from the water, so the temp of the water falls.
A TXV will simply increase refrigerant flow to maintain superheat at the end of the coil.
GFM
@@grayfurnaceman thank you for your response G!!
Do you have video to troubleshoot water reg..vavle
Is that a old Florida heat pump or a fedders
where is the water temp on your digital gauge.
Newer geo units come with gpm charts and presure scales charts to formulate your gpm
dirty Its a Florida sold by Carrier. This unit is about 30 years old and was before any real charts. The newer ones are so much better.
GFM
grayfurnaceman I worked on a fedders the other day and it had to be 30 years old ill give them one thing they build them to last back then newer units don't seem to be as durable as older equipment my uncle has a 1984 amana over and under still kicking never needed freon only 2 capacitors in its life time it was instaled a year after I wss born
So more water flow, less head pressure?
In cooling, yes. In heating, higher head pressure.
GFM