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Recent Suction Pressure questions

Mr.Brain, like you told me to check the setting of the

Mr.Brain , like you told me to check the setting of the control which i did , and made sure compressor less for less time , but what more i did is i closed the liquid receiver line valve atleast by 90 % now liquid is coming back much less , there is much less ice on the compressor and temperature in all the boxes is also good -20 C , but i know this is not a solution so what should i do

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Brian HVAC Guy

HVAC/R Consultant

High School

1,462 satisfied customers
I have a R22 rack system with 5 compressors, the problem i

i have a R22 rack system with 5 compressors , the problem i am facing is there is a lot of liquid coming back in the compressor and there is a huge ball of ice getting on the compressor winding and in the front , we have almost around 50 evaporators with TXV and i checked the superheat of the evaporators and it is between 11 to 16F , no ice on evaporator , and they are open freezers ISLAND TYPE FREEZERS with no box covers over them , but around a year back we did not had this problem of liquid coming back to the compressors, but started since 4 or 5 month , the freezers are of minus temperature and in every freezer the temperature is -18 to -25 , and i want to ask do you check subcooling on such a big system with so many expansions valves ?

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Brian HVAC Guy

HVAC/R Consultant

High School

1,462 satisfied customers
New trane AC system ,house never reaches the set temp on

New trane AC system ,house never reaches the set temp on Thermostat and freezes up frequently.also cycling on constantlyJA: Just to clarify, do you think this is a larger HVAC problem, or something specific to the thermostat?Customer: they changed the thermostat 2x but it is avery cheap model HoneywellJA: Do you plan on doing the work yourself?Customer: No it is only 6 weeks old ans they originally put in a 3t unit in our 1100 sq ft home and changed it to 2.5ton due to so many issues.Now we still have this problem recurring.JA: Anything else we should know to help you best?Customer: I don't think so

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Airheatman

Heating & Air Conditioning Contractor

6 years college

9,950 satisfied customers
My Trane A/C is running but not cooling the house. It was

My Trane A/C is running but not cooling the house. It was installed July 2014, model 4TWX5036B1 for the outdoor unit, model AM7A0B30H21 for the indoor unit. All colored LEDs are flashing on the indoor unit. Help?

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Airheatman

Heating & Air Conditioning Contractor

6 years college

9,950 satisfied customers
Low head pressure and slightly high suction pressure on a

low head pressure and slightly high suction pressure on a rtu gas pkgJA: I'll do all I can to help. How long have you been dealing with this?Customer: todayJA: Do you plan on doing the work yourself?Customer: yesJA: Anything else we should know to help you best?Customer: r22

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Phil

Consultant to Engrs, Govt & Contractors

Degree, Mech Engr Technology

9,892 satisfied customers
Have worked on alot of these little dipping freezers a local

have worked on alot of these little dipping freezers a local ice cream vendors. a few have been a real pain because theyre old hussmans with newer compressors that have AB oil.you figure the previous had mineral oil cause of age. what happens is the high side creeps up and low will head to 0(psi). thinking the two oils arent getting along. so ive replaced the refrigerants withb ones compatible with both oils and success is limited at best. whats a cost effective way to treat this?

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Phil

Consultant to Engrs, Govt & Contractors

Degree, Mech Engr Technology

9,892 satisfied customers
My wet bulb in the house return is 60F, does it mean i have

My wet bulb in the house return is 60F, does it mean i have a low load and low humidity in the house?

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Phil

Consultant to Engrs, Govt & Contractors

Degree, Mech Engr Technology

9,892 satisfied customers
My suction pressure is 125 and liquid line pressure is 275.

My suction pressure is 125 and liquid line pressure is 275. This is after I replaced a bad compressor. Outdoor ambient is 95 degrees. Indoor temp was 85 degrees. The indoor coil wet on the lower part but dry on the upper half. What could be th problem. The unit is just not cooling enough.

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HVAC Guru

Service Technician

Associate Degree

26,104 satisfied customers
Xl 16 i 2 stage 2 ton on SV92 furnace. 60 ft. line set 25

xl 16 i 2 stage 2 ton on SV92 furnace. 60 ft. line set 25 ft. lift . XL824 stat. high head 390. low side 145. Will maintain temp with no dehumidifcation. Runs constantly. no sweat on suction line at coil. Expansion valve replaced --- no change. Any thoughts?

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Phil

Consultant to Engrs, Govt & Contractors

Degree, Mech Engr Technology

9,892 satisfied customers
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