Richard - what you suggested is what I've been doing the past day - I'm not changing anything until we know that the thermostat is in a position to shut off at the desired tempearture. This installation had the thermostats to both fridge and freezer
DISCONNECTED and the C&T terminal bridged until yesterday, so I can't answer all those questions yet. The fridge is cooling
down now with the thermostat set to the warmest setting and we'll monitor
it to see at which temperature it will turn off. At the default 2000RPM it seems to be running 100% and only bringing the fridge down to 7C, the evaporator temperature is a very warm -6C but unfortunately I have run out of R134a so I can't flush my measurement gear
hoses and measure the high and low side pressures, but the running amperage for that evaporator temperature and RPM
is a lot lower than the Danfoss manual shows. I put a resistor on the C&T line so that it will run at 2500RPM or thereabouts and tomorrow I'll see what the fridge contents temperature is. There's a 100% lockdown here at the moment otherwise I would have gotten a small refrigerant can. The Seafrost BD system has a constant pressure valve which should output 1-2PSI.
With 2500RPM I think that the system will have enough cooling
power to bring down the interior
temperature enough to let the thermostat turn off the fridge when at the warmest setting. So the capillary tube question isn't the real issue here, it is a sideline question that has been answered by both the manual and OzeLouie.
The evaporator temperature should be -15c so with the other information, plus being told that someone had "played around" with testing the system and leaking refrigerant, I think that the system has an incorrect amount of refrigerant. But first we want to make sure that the thermostat is working and calibrated for the fridge, then we'll either correct the rest ourselves or get a local refrigeration mechanic
to do that.
@moseriw - No, that is not correct, the whole thermostat does not have to be inside the fridge. While this is the most common configuration, the SeaFrost system allows an external thermostat connected by a capillary tube, the documentation
states that the thermostat must be within 20 inches of the cooled space.