Trane R Series Installation Operation & Maintenance page 52

Air-cooled helical-rotary liquid chiller 50 hz 400-1500 kw
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The following equations apply:
For RTAC Units
As generated from external source
As processed by Tracer CH530
As a graph this yields the following:
XX
XX
52
Installation – Electrical
ECLS -vs- Input (VDC)
Input (VDC)
ECLS -vs- Input (mA)
Input (mA)
Voltage Signal
Vdc=0.133*(%)-6.0
% = 7.5*(VDC)+45.0
XX
XX
Current Signal
mA=0.266*(%)-12.0
% = 3.75*(mA)+45.0
For input signals beyond the 2-
10VDC or 4-20mA range, the end of
range value is used. For example, if
the customer inputs 21 mA, the
ECLS limits it self to the
corresponding 20 mA ECLS.
XX = Out of range diagnostic
I = Input
ECLS = External Current Limit
Setpoint
VDC = Volt Direct Current
mA = milliamps
RLC-SVX02G-E4

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