KT-420-4 // PDF Download
36
Dotted line: CR control.
Solid line: FI capacity control.
Operating conditions: R449A, t
O
: -10°C / t
C
: 45°C / Δt
OH
: 20 K
While the optimum capacity of the CR control is always at 100%, with FI it is achieved in the part-load range and can be adjusted by compressor
design and control range. Due to the conflicting goals of high full-load COP
r
/EER and high part-load efficiency, a compromise is necessary.
Also observe the following technical documents
: Operating Instructions semi-hermetic reciprocating compressors BITZER ECOLINE and
ECOLINE VARISPEED
: Operating Instructions semi-hermetic reciprocating compressors for subcritical CO
2
applications
: Operating Instructions semi-hermetic reciprocating compressors for transcritical CO
2
applications
: Operating Instructions reciprocating compressors – supplement "2-stage"
: Operating Instructions open drive reciprocating compressors
: Operating Instructions VARIPACK – external BITZER frequency inverters
2
Safety
Residual risks
Compressors, electronic accessories and further system components may present unavoidable residual risks.
Therefore, any person working on a device must carefully read the respective operating instructions! The following
regulations are mandatory:
• relevant safety regulations and standards
• generally accepted safety rules
• EU directives
• national regulations and safety standards
Example of applicable standards: EN378, EN60204, EN60335, EN ISO14120, ISO5149, IEC60204, IEC60335,
ASHRAE 15, NEC, UL standards.
Authorized staff
All work done on the compressors, the refrigeration systems and their electronic accessories may only be per-
formed by qualified and authorized staff who have been trained and instructed accordingly. The qualification and
competence of the specialist staff are subject to national regulations and guidelines.
Safety references
Safety references are instructions intended to prevent hazards. They must be stringently observed!
!
!
NOTICE
Safety reference to avoid situations which may result in damage to a device or its equipment.
CAUTION
Safety reference to avoid a potentially hazardous situation which may result in minor or moderate injury.
WARNING
Safety reference to avoid a potentially hazardous situation which could result in death or serious injury.
