A/C refrigerant system, checking pressures: Checking

- Switch ignition off.
- Connect high pressure hose of refrigerant recovery/recycling/recharging unit Kent-Moore ACR⁴ , or equivalent, to high pressure service connection. See DISCHARGING .
- Leave low pressure hose of refrigerant recovery/recycling/recharging unit disconnected.

NOTE: Only the high pressure service valve is used for A/C system servicing. Perform all A/C system service operations (i.e. discharging, evacuating and charging) through the high pressure service valve only.

OUTSIDE TEMPERATURE VERSUS A/C REFRIGERANT PRESSURES

Outside (ambient) temperature ⁽¹⁾

Base pressure in refrigerant system (engine OFF)

+15° C (59° F)

3.9 bar (56.5 psi)

+20° C (68° F)

4.7 bar (68.2 psi)

+25° C (77° F)

5.6 bar (81.2 psi)

+30° C (86° F)

6.7 bar (97.2 psi)

+35° C (95° F)

7.8 bar (113.1 psi)

+40° C (104° F)

9.1 bar (132.0 psi)

+45° C (113° F)

10.5 bar (152.3 psi)

⁽¹⁾	All components of A/C system must be at the specified temperature for an accurate pressure measurement.