Brochure

31AB218186428184en-US1501
GENERAL INFORMATIONPRODUCT INFORMATIONINTEGRATION INTO SYSTEMORDERING INFORMATION SYSTEM DESIGN
Manage operating envelope
System evaluation HP and LP must be monitored to respect operating envelope limitations. We consider two types of
operating envelope management:
Basic:
• HP and LP switch
• MOP (Max Operating Pressure) ensured by expansion
device
• Condensing pressure control
• DGT external
Advanced:
• HP and LP sensor
• Operating envelope limits (permanent and transient)
integrated into control logic
• DGT external
See “Test, criteria and solutions”
HP switch setting
MOP + test N
o
3
LP switch setting
Condensing pressure control
DGT
tests N
o
1 and 2
Test, criteria and solutions
Test N° Purpose Test condition Pass criteria Solutions
1
Check the
compressor
operation in
the “continuous
running area”.
Start test at minimum foreseeable
evaporating temperature (minimum
ambient temerature)
Confirmed compressor stable working
in the continuous running area.
Work on compressor staging, fan
staging, water flow etc.
2 Perform a defrost test if reversible unit
Continuous
Running Area