How do I find my Kolpak model number?

Location: The serial plate is located inside the Kolpak box on the door frame opposite of the door hinges. NOTE: DO NOT GIVE ANY NUMBERS FROM THE SERIAL PLATE ON THE EVAPORATOR THAT IS LABELED “HEATCRAFT”.

What should superheat be on a cooler?

A minimum superheat of 20°F is required at the compressor. Evaporator superheat for coolers (6-10 degrees) and freezers (4-8 degrees).

How do you charge a 404A cooler?

R-404A and R-507 refrigerant cylinders have a dip tube and liquid is charged with the cylinder upright. Break the final vacuum by charging liquid refrigerant into the receiver outlet valve access or the area of liquid line downstream from the receiver outlet.

What is the ideal superheat and subcooling?

Most heating and cooling systems should operate at a superheat of 10F at the evaporator and between 20F to 25F at the compressor. if your HVAC system has a thermostatic expansion valve (TXV), the subcooling should be between 10F and 18F.

What is normal pressure for 404a?

What should my pressures be on a 404a cooler? The normal head pressure should be between 210-260 psi.

What should pressures be on a 404a walk in cooler?

It is necessary to have the temp at 34. When the system is running, the temp in the evap is usually 24 so 32 suction pressure. The liquid line pressure needs to be higher than the outdoor ambient’s saturation temp, so it would be at least 257.

What should pressures be on 404a freezer?

When the temperature inside the freezer is at about 0°F, the low side pressure should be 8-10PSIG for R404A charged units. Refrigerators should pull down to 35°F in about 20 minutes when located in an ambient of about 75 °F.

What refrigerant is used in walk in freezers?

Most modern lab-grade freezers use R404A refrigerant, which has a GWP of 3,920. Ultra-low temperature freezers also use R508B as the secondary refrigerant, which has a GWP of 13,396.