-
56
-
'15 • HM-T-246
(3)-2 Gas injection control
<Gas injection circuit>
(1) Starting condition
If all of following conditions are established;
(a) Compressor is ON .
(b) Compressor is ON or 2 minutes has elapsed after the end of defrost operation.
(c) Suction super heat of compressor
＜
5degC is detected for 30 seconds or more continuously.
(d) Intermediate pressure sensor
＜
7.0MP a
(e) Outdoor air temperature
＜
5
℃
(f) Inlet water temperature
≦
30
℃
(2) E nding condition
If one of the start conditions (a) (b) (d) is not established.
(3) Contents of control
Open the solenoid valve for gas injection (SV -IN J1)
(3)-3 Discharge pipe temperature protection control
(1) P rotection control
compressor Hz is controlled to suppress the rise in discharge pipe temperature.
SV-INJ1: Open
gas injection
Discharge pipe temperature (Tho-D1)
Reduce Hz for every 60 seconds
Retain
Release
125
℃
130
℃
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