lees8110
21-05-2009, 06:18 PM
Hi all,
Im still learning the basics of AC and just have a few quick questions and queries if anybody would be kind enough to give me some answera or advice I wpould be very grateful,
The first being about superheat, I am working on a package heat pumpo unit, correct me if I am wrong, To measure the superheat, I am to connect my low pressure gauge on the compressor suction, my high gauge on the compressor discharge and my thermometer surface probe on the outlet of the evapourater (were the TEV bulb is) and I deduct the thermometer reading from my (comparitor converted temperature, vapour scale r407c) from my low gauge reading.
But the trouble is my low gauge is constantly fluctuating from 4 bar down to 2 bar as the condenser fan comes in and out, so I am unsure as to which reading do I take and while the this pressure is always changing so is my thermometer reading.
I am confused with this cos at college when I did this the pressure stayed the same on the fridge units we practised on.:rolleyes: Also do I need to, and how do I measure this with the unit in heating?(heat pump unit)
Can anybody educate me please:D
Im still learning the basics of AC and just have a few quick questions and queries if anybody would be kind enough to give me some answera or advice I wpould be very grateful,
The first being about superheat, I am working on a package heat pumpo unit, correct me if I am wrong, To measure the superheat, I am to connect my low pressure gauge on the compressor suction, my high gauge on the compressor discharge and my thermometer surface probe on the outlet of the evapourater (were the TEV bulb is) and I deduct the thermometer reading from my (comparitor converted temperature, vapour scale r407c) from my low gauge reading.
But the trouble is my low gauge is constantly fluctuating from 4 bar down to 2 bar as the condenser fan comes in and out, so I am unsure as to which reading do I take and while the this pressure is always changing so is my thermometer reading.
I am confused with this cos at college when I did this the pressure stayed the same on the fridge units we practised on.:rolleyes: Also do I need to, and how do I measure this with the unit in heating?(heat pump unit)
Can anybody educate me please:D