AGL_HP_VS_YHV_RG_RT_EN_Rev00 5
The matched pairs of compressor and drive released by Emerson are listed in Table 2 below.
Compressor Drive
Drive power
supply
Refrigerant
Package code
ED3/EV3
YHV029RG-9X9 ED3015AU 1~ / 230 V / 50 Hz
R290
31
YHV046RG-9X9 ED3020AU 1~ / 230 V / 50 Hz 13
YHV046RG-9X9 EV3057B 3~ / 400 V / 50 Hz 80
YHV072RG-9X9 ED3020AU 1~ / 230 V / 50 Hz 58
YHV072RG-4X9 EV3057B 3~ / 400 V / 50 Hz 72
YHV029RT-9X9 ED3015AU* 1~ / 230 V / 50 Hz
R454C
63
YHV046RT-9X9 ED3020AU* 1~ / 230 V / 50 Hz 62
YHV046RT-9X9 EV3057B 3~ / 400 V / 50 Hz 79
YHV072RT-9X9 ED3020AU 1~ / 230 V / 50 Hz 49
YHV072RT-4X9 EV3057B 3~ / 400 V / 50 Hz 67
Table 2: Matched pairs ED3/EV3 drive with YHV*RG/RT compressors
If a third-party drive is used, then the motor protection according to EN 60335-1 is under the
responsibility of the system manufacturer/installer.
A third-party control system must include discharge temperature protection, current overload
protection, and a sof t start and stopping routine. Stator heat control is also recommended for optimal
performance and reliability. It should also include the operating map parameters. Contact the
Application Engineering department at Emerson for compressor motor specifications and speed
adjustment requirements.
NOTE: It is important to ensure correct wiring at both the compressor and drive
connections prior to starting the compressor to avoid miswiring or a powered reverse
situation. Both situations could potentially cause compressor damage.
NOTE: For the latest list of matched pairs of ED3/EV3 drives with YHV*RG and YHV*RT
compressors, please refer to the ED3 & EV3 User Manuals or contact the Application
Engineering department at Emerson.
2.3 Variable speed advantages
The variable-speed scroll is a key component in the variable capacity system. A variable capacity
system will use less electrical energy by minimizing On/Off cyclical losses, maximizing heat
exchanger efficiency by operating at part load during a majority of the total operating hours, and by
operating with reduced airflow rates and blower power.
The variable-speed scroll and drive are suitable f or a variety of "best-in-class" applications. Both may
be used in other types of applications provided that the envelope and other operating restrictions are
met.
The primary benefit of this product is to substantially reduce electrical energy consumption and
associated expenses. Additionally, a variable-speed scroll offers the capability of controlling space
and domestic hot water temperature to ranges exceeding simple On/Off control, improving overall
comfort levels inside the building. The onboard electronics embedded in the drive greatly reduce the
possibility of operation outside the designed parameters which in turn increases overall system
reliability. Other benef its compared to fixed-speed systems are listed below and illustrated in
Figure 5:
Precise load matching and improved comfort:
o Compressor capacity matching demand on wide range of ambient temperatures.
o Precise temperature control.
Better seasonal efficiency:
o Reduction of temperature dif ferences in heat exchangers on wide range of operating
conditions.
o Reduced power consumption & running costs.
o Lower CO
2
emissions.
o Compliance to minimum efficiency regulation standards.
o Compressor speed above 50 1/s to match capacity demand at the limit ambient temperatures.
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