Hanbell RC2-930A - Page 53

Technical Manual VERSION 2.0 -10-18-2018
53
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k. Liquid injection system (solenoid valve + expansion valve) 
In highcondensingtemperature or lowevaporatingtemperature applications liquid injection system is recommended
to cool motor coil auxiliary. In highcompressionratio applications, liquid injection system to compression chamber is
also recommended to cool down high compression heat due to high compression ratio to maintain normal discharge
temperature. Please refer to Chapter 7 for detailed introduction of additional cooling.
Hanbell provides the following liquid injection expansion valves and solenoid valves for customers’ options. Please
refer to capacity recommended in selection program to choose appropriate liquid injection expansion valves.
Brand Model
Low Temp.
Type
High Temp.
Type
SPORLAN
Y1037FV3180,3/8"SAE
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Y1037FV5180,3/8"SAE
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ALCO
TCLE3HW6A
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TCLE5HW6A
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TCLE10HW6A
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FUJIKOKI JBEE60HFKT1
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l. Liquid injection system (solenoid valve + stop
valve)
This simple liquid injection system adjusts amount of
liquid injection by stop valve, suitable for application
with level load and ambient temperature but it’s not
recommended. Opening ratio of stop valve could not
vary with system loading and change of temperature.
Therefore, frequent check of discharge temperature
can prevent damage of compressor due to over
cooling or insufficient cooling.
Figure 40 Liquid injection – solenoid valve + stop valve
m. Horizontal check valve installation
Horizontal check valve is standard accessory of RC2F Series compressor. Considering limitation of clearance for
installation, horizontal check valve would be alternative to aforementioned vertical check valve for RC2 Series
compressor. Please refer to section C. for dimension of horizontal check valve. The installation drawing is as below:
Gasket
Check valve
Length
Gasket
Stop valve
Figure 41 Dimensions and installation of horizontal check valve
n. External oil separator
For improvement of oil return in floodedtype, lowtemperature and parallel systems, and system with long piping,
Hanbell specially designs a complete series of external oil separators – OS series with characteristics of high
filtration efficiency and low pressure drop. The following table shows details of OS series:
Note : It is recommended to install a buffer before the external oil separator to avoid noise and vibration which
caused by resonance.
RC2710, RC2790, RC2830, RC2930 cable box
(Figure 38)
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RC21020, RC1130, RC1270, RC21530 cable box
( Figure 39)
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