View Full Version : Lp switch Settings
Raswes
03-06-2008, 11:26 PM
How do iI set an LP switch with a differential for a coldroom.What sort of pressures do I require to maintain a temperature of bettween 0 and 5 degrees with the compressor cutting out and kicking in normally.
Brian_UK
03-06-2008, 11:29 PM
Are these exam questions coming round again?
With the LP switch - read the instructions that come with the switch.
What sort of refrigerant are you using?
philfridge
03-06-2008, 11:30 PM
You fit a thermostat for an accurate control of temperature as pressures vary with temperature and therfore an lp control switch will require constant adjustment and readjustment. ;)
rgs phil
Raswes
03-06-2008, 11:30 PM
Thanks ,Its R22
powell
03-06-2008, 11:50 PM
How do I set an LP switch with a differential for a coldroom.What sort of pressures do I require to maintain a temperature of bettween 0 and 5 degrees with the compressor cutting out and kicking in normally.
I read your question as: you need to control a cooler with the LPC and you need the pressure settings.
Let's assume this is a small beverage cooler with a forced air evap. I'll also assume you were giving celsius temperatures being it's R-22.
0 C = 32 F
5 C = 41 F
You could start with these settings and adjust as needed for proper temps and to prevent short cycling.
cut in: 64 psi
cut out: 34 psi
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