Trane CVGF-SVU02B-E4 Operation And Maintenance Manual page 54

54
Control System
Components
External Chilled Water Setpoint
(ECWS)
The External Chilled Water
Setpoint allows the chilled water
setpoint to be changed from a
remote location. The External
Chilled Water Setpoint is found
on 1A16 J2-2 to J2-3 (ground).
2-10 Vdc and 4-20 mA
correspond to a 0 to 65°F (-17.8
to 18.3°C) CWS range.
External Current Limit Setpoint
The External Current Limit is an
option that allows the current
limit setpoint to be changed
from a remote location. The
External Limit Setpoint is found
on 1A16 J2-5 to J2-6 (ground),
2-10 Vdc and 4-20 mA each
correspond to a 40 to 120
percent RLA range. CH530 limits
the maximum ECLS to 100
percent.
Module Characteristics
1A1, Power Supply :
Unit Control Power Supply
Module Converts 27 Vac to 24
Vdc.
Power Input Voltage: 23VRMS
minimum, 27VRMS Nominal,
30VRMS maximum
Frequency: 50-60 Hz
Current: Full load 27 Vac – 4.30 A
(RMS)
Inrush 27 Vac (RMS) ~ 30A
(RMS)
Power Output: Class II Voltage 24
Vdc, Rated Current 2.44 Amps.
1A4, 1A6, Dual high Voltage
Binary input module:
Binary Input Signal #1 J2-1 to 2
Binary Input Signal #2 J3-1 to 2
High Voltage Binary Input: Off
Voltage: 0 to 40 Vac RMS , On
Voltage: 70 to 276 Vac RMS
Input is not polarity sensitive
(Hot and neutral can be
switched), Input impedance 130K
to 280K ohms
14-26 AWG with a maximum of
two 14 AWG
Power, 24 +/- 10 percent Vdc, 20
mA maximum. Trane IPC3
protocol. J1-1 +24Vdc, J1-2
Ground, J1-3 COMM +, J1-4
COMM -
CVGF-SVU02B-E4