rsnyde11
Well-known member
hi every one need some help please, I need to know the suction pressure on a coleman, mark 4, I had a leak fixed it tested and vacuumed but not sure of the pressure, I do frozen drink machine not a/c units.
coleman a/c
- Thread starter rsnyde11
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I don't know if I can help but here goes. If it is charged with R-22, a good running suction pressure at or near 70 to 75 degrees inside would be 62# to 68# with a head pressure of 250# to 275# give or take.
A different refrigerant would have different pressures
A different refrigerant would have different pressures
OP
OP
rsnyde11
Well-known member
Thank you wasn't sure, been 30 years since I did a/c,
OP
OP
rsnyde11
Well-known member
bio thanks for the help, room temp was 87, when I started, since I use 422a instead of r22, I work slowly and checked often at air temps, after 30 mins running I ended up with a 21deg drop, air temp 80 at room, air temp at unit 59, cooling very nice, suction ended up at 72
