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What is the condensing temp for a head psi of 296 psig for an r22 system?
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What is definition of high head pressure in a air conditioner?
High head pressure is due to the lack of heat removal during the condensing process of the refrigerant cycle. The outdoor condenser is there to transfer the heat out and condense the refirgerant into a liquid. When ever the condenser is dirty or the fan motor is not working right the result is an increase in temp. and since pressure and temp are directly related the refirgerant pressure is increased thus the term high head
Why do heat gives heat than cold temperature?
Beause heat is transfered by high temp to low temp.If a system heats up so that its temperature is greater than atmospheric temperature the systan has high temp than atmospheric temp as heat transfer from high temp to low temp heat radiates from the system.
What determines the pressure on the low pressure side of the system?
temp of inbound air across a coil
Why would your air conditioner have normal head pressure and a low suction pressure?
There is no such thing as normal head pressure. It is all based on temperature and calculations. Need to know indoor air temp, outdoor air temp, wet bulb versus dry bulb. Need to know specifics. so when outside ambient temp is 90 and I'm running 255 head with a clean condenser. that isn't normail head pressure? that's pretty normal to me. working with r22 the correct answer would be. If you are sure your head pressure is where it should be, with correct freon type. low suction pressure can be caused by no blower motor, closed or blocked registers, clogged filter or evaporator, lack of airflow, undersized evaperator or oversized AC, restricted metering device(TXV, piston) blocked returns. but he is right you need a lot more info what's your superheat/subcooling? what's your delta T, is you head pressure really wre it should be? what's changed since this started happening. How low issuction pressure what's your evap saturation temp? is coil freezin up? what are your pressures exactly is condenser temp 30 degrees warmer than outside temp. with r22. do you know what you are doing????
Why low temp rise in cooling mode of heat pump?
COULD BE MANY THINGS- NEED MORE SPECIFICS. MOST LIKELY TXV OR CHARGE ISSUE. IF TEMP RISE GOOD IN H/P MODE W/O STRIP OR SUPP. HEAT ADDED MOST LIKELY TXV. IS OA TEMP AN ISSUE THIS TIME OF YEAR? (LOW HEAD PRESSURE) lc
R134a high and low pressure readings?
For a home air conditioning unit 35 psig low and 125 - 150 psig high (depending on outdoor temp) are desirable.
What is R134a low pressure and high pressure system off?
it depends on the surrounding air temp you need a pt chart for example at 90 degrees the standing pressure would be 105 psig
What is the evaporator superheat for the evaporating pressure 76 psig for R-22 and the outlet temp of 58 F?
it should be 17
What is the function of a crankcase heater in a condensing unit?
A crankcase heater is a small eclectic heater that keeps the compressor oil at a relatively warm temp. This allows the oil to circulate in the system at lower temperatures.
What is definition of high head pressure in a air conditioner?
High head pressure is due to the lack of heat removal during the condensing process of the refrigerant cycle. The outdoor condenser is there to transfer the heat out and condense the refirgerant into a liquid. When ever the condenser is dirty or the fan motor is not working right the result is an increase in temp. and since pressure and temp are directly related the refirgerant pressure is increased thus the term high head
What is the proper refrigerant psi on 1998 Chevy Tahoe?
The term would be psig not psi. Proper psig for any a/c unit auto or not is a 40 degree evaporator and you would convert 40 to psig runningng a pressure temperature chart with engine running at 1500 rpm. I its usin R-134A the psig that equals 40 degrees Fahrenheit is 34.9 psig =40 degrees Fahrenheit at 1500 rpm. In fact , 34.9 psig is the pressure for 40 degrees no matter how many rpm. Use 40 and be safe. Don't forget ,40 psig at idle will be much lower as rpm rises and evaporator could freeze up depending on humidity and ambient temp of truck inside.
Refrigerant condensing temp. should be higher than the exiting water temperature?
As rule of the thumb, refrigerant condensing temperature should between 1-2 degreeC higher than the exiting water temperature, this temperature difference is technically called condensing temperature approach. I f the approach is below or above means, system is flooded with refrigerant or system got starve. Above method is also effective in determining if the condenser shell needs maintenance for sclale, sludge build up removal. I am refrigeration mechanic.
How safe is it to powder coat iron cast steam radiators in a home?
The label on the paint container should have whatever info you want. Figure the radiator temp will not exceed 250*F if you are using steam at 15 psig which is very high for a home system and go from there.
How do you reverse a single linked list in recursive method?
Reversing a singly-linked list is (surprisingly) simple and can be done non-recursively. The following function accepts a reference to the current head of the list and returns the new head after reversing the list. node* reverse (node* head) { if (!head) return head; node *lead, *temp; lead = head; while (lead->next) { temp = lead->next; lead->next = temp->next; temp->next = head; head = temp; } return head; } Doing the same thing recursively is a bit more tricky but it can be done as follows. node* reverse (node* head, node* prev=NULL) { node* temp; if (!head) { return head; } else if (!head->next) { head->next = prev; return head; } else { temp = head->next; head->next = prev; return reverse (temp, head); } }
Why does the temp gauge stay in the hot position?
Could be, low on coolant (a leak in the system), a stuck closed thermostat, a faulty temp gauge sending unit, a bad head gasket or cracked head (worst case scenario).
Where is the ambient temp sensor located on 2008 silverado?
Try over in the ceiling over the drivers head and it looks like a mic for the onstar system.
How do I convert btu hr into lbs hr?
If The amount of energy required to produce 34.5lbs/hr of steam at a pressure and temp of 0 psig and 212degree F with feed water 0 psig and 212 degree F requires 33445.6 Btu/hr of energy ie 33445.6 Btu/hr willl produce 34.5lbs/hr then mathematically it can be solved Thank you,
