Releasing refrigerant into the system
Before you begin:
Make sure that you have checked the refrigerant system for leaks and evacuated the refrigerant
lines and indoor coil before releasing the refrigerant charge into the system. See Checking for
refrigerant leaks and Evacuating the refrigerant lines and indoor coil.
About this task:
To release the refrigerant charge into the system, follow these steps:
1. Open the liquid line service valve first.
2. When the system pressures have equalized, open the vapor line service valve by removing
the valve caps and turning the valve counterclockwise using a hex-head wrench.
3. If the service valve is a ball valve, use an adjustable end wrench to turn the valve stem one-
quarter turn counterclockwise to open. Do not overturn or the valve stem may break or
become damaged. See .
4. Replace the service valve cap finger tight, then tighten an additional 1/12 turn (1/2 hex flat).
Replace the cap to prevent leaks.
5. See for checking and recording system charge.
Installation Manual: R-454B Outdoor Split-System Air Conditioner32
Johnson Controls Ducted Systems
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