Hello all, I am after a bit of info on a domestic fridge Skandiluxe (Similar to Vestfrost) please?
I have fitted a new compressor & have weighed in the 35grams (on ID plate) of R600a (Isobutane) & have very high Superheat & a warm suction line when the cabinet is at its design temp of + 2°C
Test figures are-

Ambient temp 30°C Humidity 50% Compressor is only drawing 170mA which is well under the Danfoss design chart.


Evap. cabinet temp 0°C (32°F)
Low side saturation temp -19°C (-26kPa) (-7.6"hg)
Suction line temp of + 31°C (88°F)
SH 50 °K (90°R)

Condenser temp 44 °C (111°F)(outside of cabinet, inside wall condenser)
High side saturation temp. 46°C (115°F) (525kPa) ( 76psig)
Liquid line temp 43°C (109°F)
SC 3°K (5.4°R)

I am worried that the compressor may run too hot when the hot weather comes with the high SH? Can I get any expert opinions please? Do I need to add more charge?
PS it is very hard to weigh in 35grams with a STD 1/4" hose hanging on a small R600a can.
PS This section of fridge is not the freezer part. (it has completely dual systems)

Thanks in advance for your help. Leigh