Service manual

1-1
INTRODUCTION
SM DNGDCI 2-E.1 GB
1. INTRODUCTION
1.1 General
The new DNG DCI INVERTER ducted split unit range comprises the following RC (heat
pump) models:
• DNG 50 • DNG 80
• DNG 60 • DNG 100
• DNG 72 • DNG 125
Remote control compatibility
The DNG unit is compatible with remote controls RC3, RC4, RCW1, RCW2, RC7.
Unlike standard units (fix RPM) that are selected according to their nominal capacity to
overcome the maximum required load, DC Inverter units can be selected to a smaller
nominal capacity range unit.
It made possible due to the ability of inverters to reach a much higher capacity level
(indicated as Maximum Capacity) which is around 115-130% of the nominal capacity.
1.2 Main Features
High Technology
• Sine wave DC Compressor drive.
• DC-BL-SL (DC Brush-Less Sensor less) Inverter Compressor.
• DC-BL Inverter Outdoor Fan.
• Fuzzy Logic Adaptive Control.
System Features
• Variable cooling and heating capacity from 30% to 115% (of rated capacity).
• High COP “A-B” class energy rating (most models).
• Low noise levels.
• Pre-charged systems up to max tubing length limitation – DNG50-80 and up to 30m
– DNG100-125.
• Networking connectivity.
• Current limitation setting for circuit breaker size reduction (if required).
• Dry contact inputs:
♦
Standby
♦
Night mode (for silent operation in cooling)
♦
Power Shedding (to control max. power consumption)
• Dry contact output – Alarm.
• HMI Display consists of 7-segments shows system diagnostics and setup (DNG80-
125 DCI).
• Monitoring software (PC port for high level service).
• Cooling operation at outdoor temperature down to -10°C.
• Heating operation at outdoor temperature down to -15°C.
CONTENT