RLC-SVX07A-EN
73
Installation - Electrical
isolated or “floating” with respect to the UCM chassis ground. Refer to the
Section
“Unit Wiring”
.
If the potentiometer is to be remotely mounted, it and the resistor must be
connected to the UCM prior to mounting. Then, with the Clear Language
Display showing “Active Current Limit Setpoint” (Chiller Report Menu), the
Clear Language Display can be used to calibrate the positions of the potenti-
ometer to correspond with the desired settings for the current limits. External
resistor input values for various current limit setpoints are shown in
Table
28
.
4.
VDC Voltage Source Input
Set DIP Switch SW1-2 of Options Module 1U2 to “OFF”. Connect the voltage
source to terminals TB17 (+) and TB1-8 (-) of Options Module 1U2. CLS is
now based on the following equation:
CL Setpoint% = (VDC x 10) + 20
Sample values for CLS vs. VDC signals are shown in
Table
21
.
5.
4-20 mA Current Source Input
Set DIP Switch SW1-2 of Options Module 1U2 to “ON”. Connect the current
source to terminals T131-7 (+) and TB1-8 (-) of Options Module 1U2. CLS is
now based on the following equation:
CL Setpoint% _ (mA x 5) + 20
Sample values for CLS vs. mA signals are shown in
Table
22
.
NOTE:
The negative terminal TB1-8 is referenced to the UCM chassis
ground. To assure correct operation, 2-10 VDC or 4-20 mA signals must be
isolated or “floating” with respect to the UCM chassis ground. Refer to the
Section
“Unit Wiring”
.
Figure 31
Resistor and Potentiometer Arrangement for External Current
Limit Setpoint
Minimum setpoint = 40% (2.0 VDC input)
Maximum setpoint =
120% (10.0 VDC input)
Maximum continuous input voltage = 15 VDC
Input impedance (SW1-1 on)
(SW1-2 off)
= 40.1 Kohms
Minimum setpoint = 40% (0 mA)
Maximum setpoint = 120% (20.0 mA)
Maximum continuous input voltage = 30 mA
Input impedance
(SW1-2 on)
= 499 ohms
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Summary of Contents for R Series
Page 17: ...RLC SVX07A EN 17 Installation Mechanical Figure 2 Rigging and Lifting for RTWA Units ...
Page 22: ...22 RLC SVX07A EN Installation Mechanical Figure 7 Rigging and Lifting for RTUA Units ...
Page 25: ...RLC SVX07A EN 25 Installation Mechanical Figure 10 Rigging and Lifting for RTCA Condenser ...
Page 69: ...RLC SVX07A EN 69 Installation Electrical Figure 28 Interconnecting Wiring from RTUA to RTCA ...
Page 129: ...RLC SVX07A EN 129 Start Up Procedures Figure 41 RTWA Unit Sequence of Operation ...
Page 130: ...130 RLC SVX07A EN Start Up Procedures Figure 42 RTUA Unit Sequence of Operation ...
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