Frick SGC 1913 - Operation; Operation and Start-Up Instructions; Initial Start-Up Procedure; Normal Start-Up Procedure

070.650-IOM (AUG 2015)
Page 23
SGC ROTARY SCREW COMPRESSOR
OPERATION
Operation
OPERATION AND START-UP INSTRUCTIONS
Frick SGC/SGX Rotary Screw Compressors will be
components in an integrated system. As such the compressor
requiressomespecicoperationandconditionstoensure
trouble-free running.
The information in this section of the manual provides the
logical step-by-step instructions to properly start up and
operate SGC/SGX Rotary Screw Compressors. And only
matterswhichmayinuencetheproperoperationofSGC/
SGX compressors are included.
NOTICE
THE FOLLOWING SUBSECTIONS MUST BE READ AND
UNDERSTOOD BEFORE ATTEMPTING TO START OR
OPERATE THE UNIT.
LOW AMBIENT TEMPERATURE OPERATION
It is recommended that package oil separators be insulated
as a minimum requirement to preserve the heat generated
by the oil heaters, to prevent condensation and secure
lubrication at start-up.
It is important to control separator temperature to avoid
liquid condensation in the separator during standby. This
can be done by a combination of reducing the standby
pressure in the oil separator and insulation of the separator
to maintain temperature above saturation temperature
during standby.
INITIAL START-UP
Prior to the start-up, the prestart check must be
accomplished. See Forms section for Checklist.
INITIAL START-UP PROCEDURE
Having performed the prestart check, the compressor unit
is ready for start-up. It is important that an adequate gas
load be available to load test the unit at normal operating
conditions. The following points should be kept in mind
during initial start-up.
1. For proper and safe operation, the compressor must be
run at the proper speed and discharge pressure. Exceeding
design conditions creates a potential hazard.
For SGX compressor models, oil pressure to the SB-3 and
SB-4 ports must be adjusted to 30 psi over discharge or as
determined by Coolware.
For SG
*
H models, the balance piston regulator (BPR)
arrangementmustbeadjustedtooperateasspecied.
See “Oil Pump” section on page 6 for additional information.
2. After 1 to 3 hours of operation adjust oil cooling system.
3. Pull and clean suction strainer after 24 hours of operation.
If it is excessively dirty, repeat every 24 hours until system
is clean. Otherwise, follow the normal maintenance
schedule.
4. Perform vibration analysis if equipment is available.
NORMAL START-UP PROCEDURE
1.Conrmsystemconditionspermitstartingthecompressor.
2. Start.
3. Observe the compressor unit for mechanical tightness of
the external piping, bolts and valves. Ensure that the
machine has no oil and vapor leaks. If any of these occur,
shut down the compressor and correct the problem as
necessary using good safety precautions.