Superheat Chart

[wb]

A superheat chart from Rheem indicates that at certain conditions, (white area on chart) charging a system by superheat can result in compressor damage. It says to charge to 5 degree superheat and return when conditions are favorable.

Fixed orifice metering device...........

Example of unfavorable conditions:

90 OD DB & 61 WB / 85 DB

Is this an unfavorable condition to accurately charge by superheat because of the low latent heat load indoors??


110 OD DB & 67 WB / 85 DB

Is this an unfavorable condition to accurately charge by superheat because of the high outdoor temp / high head causing flooded evap.

Both these conditions causing liquid slugging....

Thanks

[honglo]

wb,
If you are refering to the last two readings being the indoor readings, I'd say not only would the superheat be unfavorable to the compressor but at 22% and 35% humidity, I'd get a nose bleed.

[wb]

yeah......

I was just trying to make sure I understood why these were unfavorable conditions even though it was at a common outdoor design temp.