PACD011001C2 Function
Function Urban Multi “MX1R, ME1R Series” Using R-407C 263
1.18 Te / Tc Setting
You can alter the value of targets Te (evaporating pressure equivalent temperature) and Tc (condensing
pressure equivalent temperature) with setting mode 2. PI control is used to control compressor capacity so
that Te when cooling and Tc when heating are constant.
‹
Target Te changes according to compressor operating frequency, length of piping and indoor load. The
range is -10°C
≤
target Te
≤
5.5°C. (Piping length is determined automatically during oil return
operation.)
∗
Target Tc becomes 3°C higher when indoor load is large.
Target Tc is controlled in accordance with the following conditions:
*Outdoor temp. > 10°C
→
target Tc
≤
48°C
*Outdoor temp.
≤
10°C
→
target Tc
≤
51°C
*Target Tc is 43°C when high pressure > 18.6 kg/cm
2
(1.822 MPa) and low pressure
< 1.8 kg/cm
2
(0.176 MPa).
Te setting Set temperature
High 10.5 °C
Standard 7.5 °C
Low 4.5 °C
Tc setting Set temperature
High 51 °C
Standard 48 °C
Low 45 °C
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