Start-Up - Trane CGAM Installation & Operation Manual

Start-Up

Equipment Damage!
Ensure that the oil sump heaters are connected properly and are operating properly for a
minimum of 24 hours before starting. Failure to do so may result in equipment damage.
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 using TechView.
3. Close the fused-disconnect switch for the chilled water pump. Energize the pump(s) to start
4. Check the service valves on the discharge line, suction line, oil line and liquid line for each
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.
5. Press the AUTO key. If the chiller control calls for cooling and all safety interlocks are closed,
6. Verify that the chilled water pump runs for at least one minute after the chiller is commanded
Note: Once the system has been operating for approximately 30 minutes and has become
7. Check the evaporator refrigerant pressure and the condenser refrigerant pressure under
Note: The pressures are referenced to sea level (14.6960 psia). This value is adjustable in
8. Check the EXV sight glasses after sufficient time has elapsed to stabilize the chiller. The
Note: Important! A clear sight glass alone does not mean that the system is properly charged. Also
9. Measure the system subcooling.
10. A shortage of refrigerant is indicated if operating pressures are low and subcooling is also low.
Print out a Chiller Service Report from TechView to file a start-up claim and to keep for reference
with the chiller.
CG-SVX17D-EN
CAUTION
water circulation.
circuit. These valves must be open (backseated) before starting the compressors.
CAUTION
the unit will start. The compressor(s) will load and unload in response to the leaving chilled
water temperature.
to stop (for normal chilled water systems).
stabilized, complete the remaining start-up procedures, as follows:
Refrigerant Report on the CH530 TechView.
TechView.
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.
check system subcooling, liquid level control and unit operating pressures.
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 liquid charge slowly thought the suction line service valve until operating conditions
become normal.
Unit Start-Up Procedures
151