Seasonal Unit Start-Up Procedure; Limit Conditions - Trane CGAM Installation & Operation Manual

Unit Start-Up Procedures

Seasonal Unit Start-Up Procedure

1. Close all valves and re-install the drain plugs in the evaporator heads.
2. Service the auxiliary equipment according to the start-up/maintenance instructions provided
3. At this point, all air must be removed from the system (including each pass). Close the vents
4. Open all the valves in the evaporator chilled water circuits.
5. If the evaporator was previously drained, vent and fill the evaporator and chilled water circuit.
Equipment Damage!
Ensure that the oil sump heaters have been operating for a minimum of 24 hours before
starting. Failure to do so may result in equipment damage.
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.

Limit Conditions

CH530 will automatically limit certain operating parameters during startup and run modes to
maintain optimum chiller performance and prevent nuisance diagnostic trips. These limit
conditions are noted in
Table 61. Limit Conditions
Running - Limited
Capacity Limited by High
Cond Press
Capacity Limited by Low
Evap Rfgt Temp
152
by the respective equipment manufacturers.
in the evaporator chilled water circuits.
When all air is removed from the system (including each pass), install the vent plugs in the
evaporator water boxes.
CAUTION
CAUTION
Figure 61, p.
The chiller, circuit, and compressor are currently running, but the operation of the
chiller/compressor is being actively limited by the controls. Further information is
provided by the sub-mode.
The circuit is experiencing condenser pressures at or near the condenser limit setting. The compressor
will be unloaded to prevent exceeding the limits.
The circuit is experiencing saturated evaporator temperatures at or near the Low Refrigerant
Temperature Cutout setting. The compressors will be unloaded to prevent tripping.
152.
CG-SVX17D-EN