Related Manuals for Johnson Controls NXA-FCU-01
Summary of Contents for Johnson Controls NXA-FCU-01
- Page 1 NXA-FCU-01 NXA-FCU-01 NXA-FCU-01 NXA-FCU-01 NXA-FCU-01 FAN COIL UNIT CONTROLLER Installation Guide Part # 24-9884-26 Rev A...
- Page 2 The documentation contained in this publication is the exclusive property of Johnson Controls, Inc., and its use is restricted to the licensed software with which it is furnished. This publication may not be used for any other purpose without the express written consent of Johnson Controls, Inc. Johnson Controls, Inc., reserves the right to update specifications when appropriate.
- Page 3 • Disconnect and remove any unused cables that may be acting as a transmis sion source. • Make certain that the computing device is plugged into a grounded outlet receptacle. If necessary, contact Johnson Controls Inc., for additional suggestions.
- Page 4 SYMBOLS Installation Guide FCU Controller This is the symbol for Electro-Static Discharge. Electro-Static Discharge (ESD) can damage certain electronic devices. ESD is a transfer of electrostatic charge between bodies at different electrostatic potentials caused by direct contact or induced by a electrostatic field.
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Page 5: Table Of Contents
FCU Controller Installation Guide Table of Contents FCU-01 Overview ..................6 Inspection ....................7 Requirements ....................7 Location ...................... 7 Mounting ....................8 Wiring Connections .................. 9 Power Connections ..................9 Network Wiring .................... 10 Thermostat Wiring ..................12 Input Wiring ....................13 Input Labeling .................. -
Page 6: Fcu-01 Overview
Installation Guide FCU Controller FCU-01 OVERVIEW The NXA-FCU-01 Fan Coil Unit Controller is an Application Specific Controller (ASC) in the NexSys product line. The FCU-01 controller is a 4” x 6” circuit board using SMT (surface mount technology) components. The... -
Page 7: Inspection
Installation Guide INSPECTION Inspect the carton for possible damage. If damaged, notify the appropriate carrier immediately. Inspect the components for obvious damage. Contact Johnson Controls, Inc. before returning damaged products. REQUIREMENTS • Job wiring diagrams. • Tools (not provided): - Appropriate screwdrivers for wiring terminals and mounting screws. -
Page 8: Mounting
Installation Guide FCU Controller MOUNTING The JCI FCU-01 Controller can be mounted in any direction and on any plane. Mounting dimensions are 4” x 6” overall board size for snap-track mounting. For applications requiring mounting using standoffs the .150” circuit board mounting holes are spaced 3.5”... -
Page 9: Wiring Connections
FCU Controller Installation Guide WIRING CONNECTIONS POWER CONNECTIONS Use a UL listed Class 2 power transformer supplying a nominal 24 VAC (+/- 10%). The supply to the transformer must be provided with a breaker or disconnect. NOTE: The UL listed Class 2 power transformer may be used to ... -
Page 10: Network Wiring
Installation Guide FCU Controller HOT NEU 24 VAC 24VAC HOT CHASSIS GROUND 24VAC NEUTRAL Figure 3. Power Connections. NETWORK WIRING NOTE: The following wiring types are recommended for all network wiring: 1. Belden 85102 or equivalent - 16 AWG plenum rated, unshielded, stranded. - Page 11 FCU Controller Installation Guide Connect the other lead of the twisted pair to NET- on the FCU-01 board. The network connections (Daisy Chain and T-Tap) to the FCU-01 are shown in Figure 4 below: NOTE: Doubly-terminated bus topology provides maximum wiring distance.
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Page 12: Thermostat Wiring
Installation Guide FCU Controller THERMOSTAT WIRING DO NOT WIRE ANY THERMOSTAT OTHER THAN THE JCI THERMOSTATS LISTED BELOW TO THE STAT+ AND STAT- TERMINALS ON THE FCU-01 BOARD. • • • • • JCI INTELLIGENT THERMOSTAT NXT-INT-01 • • • • •... -
Page 13: Input Wiring
FCU Controller Installation Guide INPUT WIRING Inputs allow a user to connect thermistors and dry contacts to the FCU-01 controller. There are 6 inputs on the FCU-01 controller and the inputs must be jumpered to allow for thermistors or dry contacts. The Inputs are shown in Figure 6 below and must be wired as follows: •... -
Page 14: Input Labeling
Installation Guide FCU Controller INPUT LABELING The inputs are labeled I1-I6 and are located on terminal block J2. The jumpers for the inputs are labeled J4-J9. The following table lists the input number with its corresponding jumper block number: Jumper Block # Jumper Block # Input # Input #... -
Page 15: Input 1 (I1) - Discharge Air Temperature Wiring
FCU Controller Installation Guide INPUT 1 (I1) - DISCHARGE AIR TEMPERATURE WIRING Input 1 must be wired to the Discharge Air Temperature. Wiring for I1 is shown in Figure 8. To wire I1 to a thermistor: 1. Select the correct jumper setting for a thermistor on J9. 2. -
Page 16: Input 2 (I2) - Mixed Air Temperature Wiring
Installation Guide FCU Controller INPUT 2 (I2) - MIXED AIR TEMPERATURE WIRING Input 2 must be wired to the Mixed Air Temperature. Wiring for I2 is shown in Figure 9. To wire I2 to a thermistor: 1. Select the correct jumper setting for a thermistor on J8. 2. -
Page 17: Input 3 (I3) - Space/Return Air Temperature Wiring
FCU Controller Installation Guide INPUT 3 (I3) - SPACE/RETURN AIR TEMPERATURE WIRING Input 3 must be wired to the Return Air Temperature if a JCI thermostat (Intelligent or TSO STAT) is used. If a JCI sensor (Room or Room Override Sensor) is used, Input 3 must be wired to Space Temperature. -
Page 18: Input 4 (I4) - Outside Air /Supply Water Temperature Wiring
Installation Guide FCU Controller INPUT 4 (I4) - OUTSIDE AIR /SUPPLY WATER TEMPERA- TURE WIRING Input 4 must be wired to the Outside Air Temperature or the Supply Water Temperature. Wiring for I4 is shown in Figure 11. To wire I4 to a thermistor: 1. -
Page 19: Input 5 (I5) - Fan Status
FCU Controller Installation Guide INPUT 5 (I5) - FAN STATUS Input 5 must be wired to the Fan Status. Wiring for the I5 is shown in Figure 12. To wire I5 to a dry contact: 1. Select the correct jumper setting for a dry contact on J5. 2. -
Page 20: Input 6 (I6) - Emergency Shutdown
Installation Guide FCU Controller INPUT 6 (I6) - EMERGENCY SHUTDOWN Input must be wired to the Emergency Shutdown. Wiring for the I6 is shown in Figure 13. To wire I6 to a dry contact: 1. Select the correct jumper setting for a dry contact on J4. 2. -
Page 21: Digital Outputs
FCU Controller Installation Guide DIGITAL OUTPUTS The digital outputs are located on terminal block J3 and are labeled DO1 - DO5. The digital outputs shown in Figure 14 below must be wired as follows: • DO1 must be wired to the Fan •... -
Page 22: Digital Output Do1 - Fan Wiring
Installation Guide FCU Controller DIGITAL OUTPUT DO1 - FAN WIRING NOTE: The rating for this output is 0.5 amps at 24VAC. Digital output 1 must be wired to the fan. Wiring for the Fan is shown in Figure 15. To wire DO1 to the Fan: 1. -
Page 23: Digital Outputs Do2 And Do3 - Cooling Inc/Dec Or Stage 1/2 Wiring
FCU Controller Installation Guide DIGITAL OUTPUTS DO2 AND DO3 - COOLING INC/DEC OR STAGE 1/2 WIRING NOTE: The rating for these outputs is 0.5 amps at 24VAC. Digital outputs 2 and 3 must be wired to the Cooling Increment/Cooling Stage 1 and the Cooling Decrement/Cooling Stage 2. -
Page 24: Discrete Control
Installation Guide FCU Controller DISCRETE CONTROL If the cooling control is discrete, then DO2 and DO3 are used to activate Stage 1 and Stage 2 of cooling. DO2 must be wired to Cooling Stage 1 and DO3 must be wired to Cooling Stage 2. Wiring for the Cooling Stage 1 is shown in Figure 17. -
Page 25: Digital Outputs Do4 And Do5 - Heating Inc/Dec Or Stage 1/2 Wiring
FCU Controller Installation Guide Wiring for the Cooling Stage 2 is shown in Figure 18. To wire DO3 for Cooling Stage 2: 1. Connect the HOT terminal to one side of the pilot relay’s coil. 2. Connect the DO3 terminal to the other side of the pilot relay’s coil. 3. -
Page 26: Floating Control
Installation Guide FCU Controller FLOATING CONTROL If the heating control is a modulated valve, then DO4 and DO5 are used to increment and decrement the actuator and open the valve to increase or decrease the heated water flow and increase or decrease the heating output. DO4 must be wired to Heating Increment and DO5 must be wired to Heating Decrement. -
Page 27: Discrete Control
FCU Controller Installation Guide DISCRETE CONTROL If the heating control is discrete, then DO4 and DO5 are used to activate Stage 1 and Stage 2 of heating. DO4 must be wired to Heating Stage 1 and DO5 must be wired to Heating Stage 2. Wiring for the Heating Stage 1 is shown in Figure 20. -
Page 28: Analog Output
Installation Guide FCU Controller Wiring for the Heating Stage 2 is shown in Figure 21. To wire DO5 for Heating Stage 2: 1. Connect the HOT terminal to one side of the pilot relay’s coil. 2. Connect the DO5 terminal to the other side of the pilot relay’s coil. 3. -
Page 29: Analog Output Ao1 - Damper Actuator Wiring
FCU Controller Installation Guide ANALOG OUTPUT AO1 - DAMPER ACTUATOR WIRING NOTE: The analog output is a 0-10 volt output. Wiring for a damper actuator is shown in Figure 22. To wire AO1 to a damper actuator: 1. Connect the positive lead of the analog device to the analog output terminal (AO1) on terminal block J3. -
Page 30: Warranty
Some states Johnson Controls, Inc., at no charge to you. do not allow the exclusion or limitation of incidental or consequential damages, so the Johnson Controls, Inc., expressly reserves the...