152 CG-SVX17D-EN
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
by the respective equipment manufacturers.
3. At this point, all air must be removed from the system (including each pass). Close the vents
in the evaporator chilled water circuits.
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.
When all air is removed from the system (including each pass), install the vent plugs in the
evaporator water boxes.
CAUTION
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.
CAUTION
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 Figure 61, p. 152.
Table 61. Limit Conditions
Running - Limited
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.
Capacity Limited by High
Cond Press
The circuit is experiencing condenser pressures at or near the condenser limit setting. The compressor
will be unloaded to prevent exceeding the limits.
Capacity Limited by Low
Evap Rfgt Temp
The circuit is experiencing saturated evaporator temperatures at or near the Low Refrigerant
Temperature Cutout setting. The compressors will be unloaded to prevent tripping.
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