Got a push-button version from Fedex this morning. Came with a nice cut-off valve too.
The markings on the gauge is in Bar.
Bar PSI
0 = 0
----Green-- Low
7 = 101.5
----Blue-- Full
9.5 = 137.8
----Yellow-- Warning
11 = 159.5
----Red-- Danger
15 = 217.5
The Full range of 101.5 to 137.8 PSI seems to be good for cooling mode on the Sanyo.
I think the pressure on the service port during heating would break the meter!!