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 J2-5 to J2-6 (Ground). 2-10 vdc and 4-20 ma correspond to a 34°F to 65°F (-17.8 to 18.3°C) CWS range. Default 34°F to 65°F, adjustable via service tool.

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 J2-2 to J2-3 (ground), 2-10 vdc and 4-20 ma each correspond to a 40 to 100 percent RLA range. UCP limits the maximum ECLS to 100 percent. Default 40 to 100%, adjustable via service tool.

Note: To use external inputs, the setpoint source setting on DynaView must be set to “Ext/FP.”

The ECWS or ECLS LLID will report either a very low or very high value when there is either an open or short in the system.

When an open or short is detected (or the signal is severely beyond the valid range) on the 2-10 VDC or 4- 20mA ECLS input and when the ECLS option is installed, an informational diagnostic shall be generated. The active current limit set point will default to the panel (or next priority) current limit set point. Open and short criteria will be set as close to the end of the range values as possible and still reliably detect an open and short.

WPSR (WFC Water Pressure Sensing Option)

1A21 Optional Dual

WPSR = WFC

Signal #1

Evaporator Differential

Not for field use

Analog Input or output

 

 

Water Pressure

 

Module

 

 

 

 

1A21 Optional Dual

WPSR = WFC

Signal #2

Condenser Differential

Not for field use

Analog Input or output

 

 

Water Pressure

 

Module

 

 

 

 

Module Characteristics

1A1, 1A2 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. Fused @ 3 amps. (FUS01513)

1A3, 1A5, 1A10 Dual Relay Output modules :

Relay #1 J2-1 NO, J2-2 NC, J2-3 common

Relay #2 J2 4 NO, J2-5 NC, J2-6 common

Relay Outputs at 120 VAC: 7.2 Amps resistive, 2.88 Amps pilot duty, 1/3 HP, 7.2 FLA at 240 VAC: 5 Amps general purpose, 14 - 26 AWG with a maximum of two 14 AWG.

Power, 24 +/- 10 percent VDC, 60 mA maximum, Trane IPC3 protocol. J1-1 +24VDC, J1-2 Ground, J1-3 COMM + J1-4 COMM -

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 -

1A7 High Power Relay

Relay output contacts at 120 VAC:

16.0Amps resistive, 6.4 Amps pilot duty, 1 HP, 16.0 FLA

J2 14-26 AWG with a maximum of two 14 AWG J2-1 NO, J2-2 NO, J2-3 NC, J2-4 COM, J2-5 COM.

Power, 24 +/- 10% VDC, 60 mA max. Communications, RS485 Physical layer, 19.2 Kbaud, Trane IPC3 protocol.

J1: J1-1 +24 VDC, J1-2 GND, J1-3 COMM +, J1-4 COMM -

J11: J11-1 +24 VDC, J11-2 GND, J11-3 COMM +, J11-4 COMM -

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Trane CVHE-SVU01E-ENX39640712050 manual External Chilled Water Setpoint Ecws, External Current Limit Setpoint

CVHE-SVU01E-ENX39640712050 specifications

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