Installation manual

InRow RD Operation and Maintenance10
Charging the equipment
Caution: This procedure is to be done by APC-trained personnel only.
R407C is a blend refrigerant. When charging equipment with blend refrigerants, only liquid refrigerant
must be charged.
Caution: Charging with other than liquid R407C refrigerant may damage the system.
1. Ensure the ball valves are open.
2. Confirm the calculated system
charge.
3. Connect the refrigerant cylinder to
the charging or gauge port on the
receiver outlet valve. Open the
receiver valve approximately half
way.
4. Charge liquid refrigerant into the
high side of the system until the
system pressures equalize. While the unit is NOT operational, charge liquid to the suction (low
side) line to simply equalize pressures throughout the system DO NOT start the system until the
pressure equalizes. Please note charging liquid to the suction port during operation may damage
or reduce the life of the compressor.
5. Prior to starting the system, make sure all
system valves are open and the system high
side pressure remains above 15.9 bar (230 psi).
This may require blocking the condenser inlet
slightly. Remove any blocking panels after
charging is complete.
6. Start the cooling unit. See “Start the cooling
unit” on page 18
7. Once the system is operational, front seat the
receiver service valve and continue charging
liquid at the Schrader port down stream of the
receiver shutoff valve, until the calculated
charge is complete. When this procedure is
complete, fully back seat the receiver shutoff
valve. Leave charging hoses in place in the
event additional charging is required.
na2455a
Service port
Schrader port
Liquid line
LEAK
DETE CT OR
CA BLE
SUCTIO N
DIS CHA RGE
SERVICE
na2266a