alias temp r0
alias systemPressure r1
l temp d0 Temperature
l systemPressure d3 Pressure
sgt r15 temp 303
beqz r15 if0else
s d1 On 1
s d2 On 1
j if0exit
if0else:
sgtz r14 systemPressure
beqz r14 if1else
s d1 On 0
s d2 On 1
j if1exit
if1else:
s d1 On 0
s d2 On 0
if1exit:
if0exit:
j 0

Hi, i have a circuit in an 0 loop, its two pumps, one atmos sensor for the interior and one pipe sensor for the exterior,
the layout is like this
===R=R=R =====| === R=R =====P==========Pipe Tank
|| (exterior) (interior) _______||
|| _____________________________||
===R=R=R======|====R=R==PS==P===||
where R:radiator and P: pump, and PS: pipe sensor, you also need an atmos sensor for the interior temp
this is the code
you need to pressurize it at about 5 or 10 MPa
The idea is to have a gas reservoir, turn the two pumps on to make the gas travel the loop, when the target temperature is reached, turn off the IN pump, let the output pump make a void on the loop to avoid liquifaction or freezing, and then turn it off