R404a and low side pressure under load

[rabeb25]

hey guy just wondering of any one knew or knew where i could find the proper low side pressure using r404 in a prommie under load. I think I need to add a tad bit more refridgerant because under load at 2.3 volts the evap temps drop drasticly and keep rising. yet under load on stock voltage I get may a 1-2 c rise in temps. If I remember correctly we saw about 0 on the low side before.
Thanks in advance
Bryan

[CodeRed]

0" was the low side pressure that I used too. I also have the same probs with holding the temp at really high heat loads.

Dont know what the best value really is :(

[rabeb25]

well i am gonna have him come out and fill her up while i put a 2.3 load on it and prime. I am gonna see here i guess

[rabeb25]

well i am at -10in hg underloads and seems to be the ticket. who knows though

[Merenfreak]

-10 ? What value do you mean ?
I wana refill my prommy next week.

cya

[bowman1964]

Originally posted by Merenfreak
-10 ? What value do you mean ?
I wana refill my prommy next week.

cya
he is refering to the high and low pressure reading of the compressor.

-10 means the low side (suction side) of the compresser is pulling 10 psi of vacuum.so it would say 10in hg.

[rabeb25]

does that sound right to you bowman?
I know you know a tad bit about this stuff:D

[bowman1964]

well i am at work so i am only guessing.but -10 or 10 inches of vacuum with r404a should give evaperator temps of below -55c now that is the temp the freon is evaperating at...not the cpu or block temp

[rabeb25]

yea you are corect my sig shows the evap load temp.

[Merenfreak]

@ Rabeb25

How much freon did you fill in or started with ?

cya

[rabeb25]

started with nothing, sucked it all out, ended up putting in.... who knows...heh
sorry
Bryan