So for a R22 Beta.
OAT 25C.
CH Cold.
Max continuous: 23.75
5 min take off: 24.75
CH Hot (+1.5").
Max continuous: 25.25
5 min take off: 26.25
So its then OK to exceed the MP red line at 25.2 since the whole scale has effectively shifted? Red line is now at 25.2 + 1.5 = 26.7.
Working things backwards from the CH hot figures above to use the CAT gauge to base calculations upon, the CAT I would be looking for to support this would be off the scale, which terminates at +40C.
OAT 25C.
CH Hot (+1.5").
Max continuous: 25.25
25.25 - 23 = 2.25
2.25 * 100 = 225
225 / 3 = 75C
