Installation and Maintenance Manual

Unit Start-Up Procedures
RLC-SVX09H-EN 177
Start-up
If the pre-start checkout, has been completed, the unit is
ready to start.
1. Press the STOP key on the CH530.
2. As necessary, adjust the setpoint values in the CH530
menus usingTechView.
3. Close the fused-disconnect switch for the chilled water
pump. Energize the pump(s) to start water circulation.
4. Check the service valves on the discharge line, suction
line, oil line and liquid line for each circuit.These valves
must be open (backseated) before starting the
compressors.
5. Press the AUTO key. If the chiller control calls for
cooling and all safety interlocks are closed, the unit will
start.The compressor(s) will load and unload in
response to the leaving chilled water temperature.
6. Verify that the chilled water pump runs for at least one
minute after the chiller is commanded to stop (for
normal chilled water systems).
Note: Once the system has been operating for
approximately 30 minutes and has become
stabilized, complete the remaining start-up
procedures, as follows:
7. Check the evaporator refrigerant pressure and the
condenser refrigerant pressure under Refrigerant
Report on the CH530TechView. The pressures are
referenced to sea level (14.6960 psia).
8. Check the EXV sight glasses after sufficient time has
elapsed to stabilize the chiller.The refrigerant flow past
the sight glasses should be clear. Bubbles in the
refrigerant indicate either low refrigerant charge or
excessive pressure drop in the liquid line or a stuck
open expansion valve. A restriction in the line can
sometimes be identified by a noticeable temperature
differential between the two sides of the restriction.
Frost will often form on the line at this point. Proper
refrigerant charges are shown in the General Data
tables.
Important: A clear sight glass alone does not mean that
the system is properly charged. Also check
system subcooling, liquid level control and
unit operating pressures.
9. Measure the system subcooling.
10. A shortage of refrigerant is indicated if operating
pressures are low and subcooling is also low. If the
operating pressures, sight glass, superheat and
subcooling readings indicate a refrigerant shortage,
gas-charge refrigerant into each circuit, as required.
With the unit running, add refrigerant vapor by
connecting the charging line to the suction service
valve and charging through the backseat port until
operating conditions become normal.
Seasonal Unit Start-Up Procedure
11. Close all valves and re-install the drain plugs in the
evaporator and condenser heads.
12. Service the auxiliary equipment according to the start-
up/maintenance instructions provided by the
respective equipment manufacturers.
13. Vent and fill the cooling tower, if used, as well as the
condenser and piping. At this point, all air must be
removed from the system (including each pass). Close
the vents in the evaporator chilled water circuits.
14. Open all the valves in the evaporator chilled water
circuits.
15. If the evaporator was previously drained, vent and fill
the evaporator and chilled water circuit.When all air is
removed from the system (including each pass), install
the vent plugs in the evaporator water boxes.
16. Verify condenser coils are clean.
NOTICE:
Equipment Damage!
Ensure that the oil separator and compressor heaters
have been operating for a minimum of 24 hours before
starting. Failure to do so may result in equipment
damage.
NOTICE:
Compressor Damage!
Catastrophic damage to the compressor will occur if the
oil line shut off valve or the isolation valves are left
closed on unit start-up.
NOTICE:
Equipment Damage!
Ensure that the oil separator and compressor heaters
have been operating for a minimum of 24 hours before
starting. Failure to do so may result in equipment
damage.
NOTICE:
Compressor Damage!
Catastrophic damage to the compressor will occur if the
oil line shut off valve or the isolation valves are left
closed on unit start-up.