Service manual
Table Of Contents
- DNG DC Inverter Series
- LIST OF EFFECTIVE PAGES
- TABLE OF CONTENTS
- INTRODUCTION
- PRODUCT DATA SHEET
- RATING CONDITIONS
- OUTLINE DIMENSIONS
- PERFORMANCE DATA & PRESSURE CURVES
- AIRFLOW CURVES
- SOUND LEVEL CHARACTERISTICS
- ELECTRICAL DATA
- WIRING DIAGRAMS
- REFRIGERATION DIAGRAMS
- TUBING CONNECTIONS
- CONTROL SYSTEM
- TROUBLESHOOTING
- EXPLODED VIEWS AND SPARE PARTS LISTS
- APPENDIX A
5-31
PERFORMANCE DATA & PRESSURE CURVES
SM DNGDCI 2-E.1 GB
5.9 Calculation Example
Outdoor Unit OU12 5HP DCI
Indoor Unit DNG 125 DCI
Operation Mode Cooling Mode
Conditions Indoor 22°CDB/15°WB
Conditions Oudoor 30°CDB
Tubing length 50m
Cooling Capacity calculation:
Total Cooling Capacity (TC) [KW] = Capacity in conditions table x F
T
Cooling Capacity
in table [KW]
Tubing Length
Factor (F
T
)
Corrected Capacity
[KW]
11.5 0.85 TC
= 11.5x0.85=9.775
Cooling Pressure calculation:
Pressure [Barg] = Nominal Pressure (at 7.5m) x F
T
Nominal Pressure
[KPa(g)]
Tubing
Length
Factor
(F
T
)
Corrected Pressure [KPa(g)]
Discharge 2500 0.99 Pd= 2500 x 0.99 = 2475
Suction 800 0.925 Ps= 800 x 0.925 = 740
CONTENT