Quote Originally Posted by runmc View Post
Suggestions please -

Compressor - NF5.5CLX - VapoLS - r404/r507 - LBP/MBP
evaporator - gosmeyer
Refrigerant - r402a
Cap tube - 120" (3.048M)

Ambient temp - 24.5C

Idle
Air into front of condenser - 24.5C
Air out of back of condenser - 28.3C

Evap temp @ idle - 43C
Load block temp @ idle - 43C

Low side pressure - 4psi
High side pressure - 210psi

suction line temp 6 inches from compressor - -38.5C

202Watt load

Evap temp - -26.1C
Load block temp - -21.5C

Low side pressure - 13psi
High side pressure - 240psi

suction line temp 6 inches from compressor - -3.5C
gas temp into top of condenser - 48C
liquid temp out of bottom of condenser - 34C

220Watt load

Evaporator temp - -25.1C
Load block temp - -20.2C

suction line temp 6 inches from compressor - +3.4C

low side pressure - 14psi
high side pressure - 245psi

240 watt load

evaporator temp - -24.2C
block temp - -19.2C

low side pressure - 15psi
high side pressure - 250psi

It held 240watts for about 45 min and then pressures dropped to 12psi low side and 240psi high side and evap and block temp rose up to 60F and that's when I turned off load.

I would like to be able to handle 250watt load without crashing I have a BIG charge on it now - no way I can add more r402a.
i suggest to shorten the cap. 15 to 20 cm with larger suction container and tilting more upward towards the compressor that push you to even 270 watt