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Pre-Start-Up Checklist - Scroll Compressor Chillers
Must be completed, signed and submitted to Comfort Flex at least 2 weeks prior to the requested start date.
Job name
Place of installation
Customer order number
Model number(s)
G.O. Number(s)
Chilled water and condensing water for water-cooled chillers
Si
No
N/A
Iniciales
Complete piping
Water strainer(s) installed in piping according to manual requirements
Water system: flushing, filling and draining; water treatment in place
Pumps installed and operational (rotation check, filter cleaning)
Controls in operation (3-way valves, front/bypass gates, bypass valves, etc.)
Water system operated and tested; flow meets unit design requirements (Not all units include it)
Flow switch(es) -installed, wired and calibrated
Ventilation installed on evaporator
Electrical
Si
No
N/A
Iniciales
Building controls in operation
* Power cables connected to power block or optional disconnect switch
Power cables have been checked for proper phasing and voltage
All interlock scripts are complete and meet unit specifications
Power is applied at least 12 hours prior to start-up
Oil heaters energized at least 12 hours prior to startup
Cooler components (EXV sensor transducers) installed and wired properly
*Wiring complies with National Electrical Code and local codes (See Notes)
Various
Si
No
N/A
Iniciales
Unit control disconnects everything
Factory check of remote evaporator/condenser lines
Leak, evacuation and charge check of all refrigeration piping/components
Thermometers, wells, gauges, control, etc., installed
Minimum system load of 80% of available capacity to test/adjust controls
Attachment: Technical breakdown of selection software
Attachment: Acknowledgment of Receipt of Final Order
Attachment: Remote Piping Approval
Notes: The most common problems that delay start-up and affect the reliability of the unit are:
1. Compressor motor power cables installed in the field are too small. Questions: Contact your local Comfort Flex sales representative*. Indicate the size,
number and type of conductors and conduits installed:
a. From power supply to chiller __________________________________________________________________
* Refer to NFPA 70-2017, Article 440.35
2. Remote evaporator piping is incomplete or incorrect. Provide approved piping diagrams.
3. Items on this list have been incorrectly recognized, resulting in delayed start-up and possible additional expense for round trips.
Contractors’ representative
Signature
Name
Company
Date
Phone / Mail
Comfort Flex Sales Representative
Signature
Name
Company
Date
Phone / Mail