ccs single-zone and change-over bypass (cobp) single

CCS Single-Zone and Change-Over Bypass (COBP) Single Packaged Unit (SPU) Controllers Installation InstructionsLC-RTU1001-0, LC-RTU1002-0,LC-RTU1004-0, LC-RTU1005-0

LIT-12011544Release 1.2

Issued July 15, 2011Supersedes June 30, 2010

ApplicationsThe Commercial Comfort System (CCS) Single-Zone and Change-Over Bypass (COBP) Single Packaged Unit (SPU) Controllers are designed to run a pre-engineered Heating, Ventilating, and Air Conditioning (HVAC) zoning application and provide the inputs and outputs required for this application. These controllers may be used with constant volume, heat pump, and split system equipment.

The SPU Controllers contain multiple features to ensure occupant comfort. Occupancy sensing capability enables the SPU controller to switch from occupied mode to standby mode based upon the presence of local activity. Standby mode maximizes energy savings by using setpoints that are higher and lower than occupied mode setpoints. With the addition of a Simplicity® Variable Air Volume (VAV) control board, the SPU Controllers also offer dehumidification capability (constant volume only) that monitors humidity levels within the zone and CO2 Demand Controlled Ventilation (DCV) mode which regulates CO2 levels within a zone. For further information on these types of operations, refer to the Commercial Comfort System (CCS) Operation Overview Technical Bulletin (LIT-12011617).

The SZ Controller (LC-RTU1001-0) is preconfigured to control the SPU based on zone temperature in single zone systems. The COBP Controller (LC-RTU1002-0) is preconfigured to control the SPU based on discharge air temperature in constant volume zoning systems. Both the LC-RTU1001-0 and LC-RTU1002-0 controllers can be used with heat pump equipment and split systems with staged outputs.

The LC-RTU1004-0 and LC-RTU1005-0 SPU Controllers are preconfigured for use in constant volume or COBP split system applications with field-installed hot water or steam coil heating.

North American Emissions ComplianceUnited States

Canada

InstallationSpecial Tools Needed• wire strippers

• small flat-head screwdriver

• 22 AWG (0.65 mm) 3-conductor, twisted, shieldedcable with a drain wire

Note: This drain wire is used only to group theshielded cable. Do not use this drain wire as aconnection to the board.

• wire nuts for 22 AWG drain wire

• electrical tape

This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when this equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case the user will be required to correct the interference at his/her own expense.

This Class (A) digital apparatus meets all the requirements of the Canadian Interference-Causing Equipment Regulations.

Cet appareil numérique de la Classe (A) respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.

CCS Single-Zone and Change-Over Bypass (COBP) Single Packaged Unit (SPU)Controllers Installation Instructions

1

AccessoriesTable 1 lists the SZ and COBP SPU Controller accessories.

MountingThe manufacturing facility mounts the controller. All of the required power wiring, internal unit sensor wiring, and output wiring is completed and tested at the factory. The control application required for the specific Single Packaged Unit (SPU) is factory configured and ready for operation.

WiringField Wiring ConnectionsIn addition to the high voltage connections, the CCS SPU requires the following connections:

1. The communication bus connection and address selection are required for networking with a CCS Building Automation System (BAS).

2. A zone temperature sensor is required for single zone units. Two models are supported: TE-68NT-1N00S (sensor with warmer/cooler adjustment) and TE-68NT-0N00S (sensor only).

Power WiringThe CCS SZ and COBP Controllers are factory wired for 24 VAC power. When you select the product code number, you also select the appropriate primary voltage. The controller does not require an earth ground connection.

In certain cases, you may need to share a 24 V transformer with multiple CCS devices. Be sure that you maintain consistent +, -, and common wiring terminations on the shared CCS devices.

Table 1: SPU Controller AccessoriesProduct Code Number

Description

TE-68NT-0N00S Wall temperature sensor, 1k ohm, nickel with temperature occupancy button

TE-68NT-1N00S Wall temperature sensor, 1k ohm, nickel with Warmer/Cooler (W/C) adjust and temperature occupancy push button

OLS-2100-11

1. When the OLS-2100-1 sensor is used in conjunction with the RIBU1C relay, the controller can use an occupancy sensing strategy for temperature control.

Occupancy sensing light switch for control of indoor incandescent and fluorescent lights

CD-W00-00-1 Wall-mounted CO2 sensor (0–2,000 ppm range)

RIBU1C Enclosed relay for OLS-2100-1 sensor

IMPORTANT: The 24 VAC power should not be shared with other network devices. Sharing power to other network devices may cause noise, interference, and ground loop problems. You may damage the controller by sharing power to other devices.

IMPORTANT: Do not interchange +, -, and common 24 V terminations when sharing a transformer with multiple CCS devices. Interchanging these terminations can cause damage to the controller.

CCS Single-Zone and Change-Over Bypass (COBP) Single Packaged Unit (SPU) Controllers Installation Instructions

2

Wire Gauges and LengthsTable 2 outlines the controller wiring details.

Table 2: CCS SZ and COBP Controllers Wiring (Part 1 of 2)Terminal Terminal

LabelsFunction and Electrical Ratings/Requirements

Recommended Cable Type and Length

Analog Input (AI)

AI-1AI Com

Provides analog input connection for space temperature (LC-RTU1001-0 and LC-RTU1004-0 only)

0.65 mm (22 AWG) stranded, 2-wire twisted cable recommended for runs of < 30 m (99 ft).

AI-2AI Com

Provides analog input connection for space temperature warmer/cooler adjustment (optional), 1,500 ohm potentiometer (LC-RTU1001-0 and LC-RTU1004-0 only)

0.65 mm (22 AWG) stranded, 2-wire twisted cable recommended for runs of < 30 m (99 ft)

AI-3AI Com

Not Available Not Available

AI-4AI Com

Provides analog input connection for Relative Humidity (RH) (optional) 0 to 10 VDC input1


AI-5AI Com

Provides analog input connection for CO2 sensor (optional) 0 to 10 VDC input2


AI-6AI Com

Provides analog input connection for discharge temperature sensor - 10k ohm Type 3 thermistor3

Factory Wired

AI-7 AI Com

Provides analog input connection for return temperature sensor - 10k ohm Type 3 thermistor3

Factory Wired

AI-8AI Com

Provides analog input connection for outdoor temperature sensor - 10k ohm Type 3 thermistor3

Factory Wired

Binary Input (BI)

BI-1BI Com

Provides a binary input for occupancy sensor dry contact


BI-2BI Com

Provides binary input connection for fan status - dry contact input


BI-3BI-Com

Provides a binary input for filter status 0.65 mm (22 AWG) stranded, 2-wire twisted cable recommended for runs of < 30 m (99 ft)

Binary Output (BO)

BO-1 BO Com

Provides binary output connection for 1st stage electric heat (LC-RTU1001-0, LC-RTU1002-0) or open for incremental valve (LC-RTU1004-0, LC-RTU1005-0)

Factory Wired (LC-RTU1001-0, LC-RTU1002-0), or 1.5 mm (18 AWG) stranded, 2-wire twisted cable recommended for runs of < 30 m (99 ft) (LC-RTU1004-0, LC-RTU1005-0)

BO-2BO Com

Provides binary output connection for 2nd stage electric heat (LC-RTU1001-0, LC-RTU1002-0) or close for incremental valve (LC-RTU1004-0, LC-RTU1005-0)

Factory Wired (LC-RTU1001-0, LC-RTU1002-0), or 1.5 mm (18 AWG) stranded, 2-wire twisted cable recommended for runs of < 30 m (99 ft) (LC-RTU1004-0, LC-RTU1005-0)

BO-3BO Com

Provides binary output connection for occupancy command

Factory Wired

BO-4BO Com

Provides binary output connection for 1st stage cooling

Factory Wired


3

Setup and AdjustmentsTo quickly set up your CCS network:

1. On each end of the 3-conductor cable, strip the outside insulation back approximately 2 in. (51 mm).

2. Tear off excess foil shield, leaving the bare drain wire and the three insulated conductors.

3. On each end of the three insulated conductors in the cable, strip the insulation back approximately 1/8 to 1/4 in. (4 to 7 mm).

4. Choose a color pattern to follow and insert each of the three conductors into one each of the three terminals on the CCS board communication connector.

5. Tighten each terminal until the wire is secure (Figure 4).

6. Ground the drain wire at one end only of the communication trunk. Do this on the last unit in line.

7. Use an existing hole or drill a hole and insert a sheet metal screw in the back plate below the communication connector.

8. Wrap the bare drain wire around the screw and tighten the screw. This is the only location where the shield is grounded.

9. Daisy chain the three-conductor wire between the remaining SPUs. Connect the drain wires together with the wire nuts (Figure 4). Follow the stripping and connecting procedure in Step 1 through Step 8.

10. Run the cable from the last unit to the location of the System Manager or Zone Coordinator. Follow the connection instructions for the System Manger or Zone Coordinator. Figure 5 displays a typical communication riser.

11. Make sure all the SPUs are powered and operating properly (Figure 3).

Note: Be sure you observe polarity of each of the conductors in the communication cable.

Communication BusDetermining the Bus AddressThe bus address switch sets a unique address for the controller on the CCS communication bus. The default address setting is 255 (all ON). You must change the default address.

Set consecutive addresses 18 through 41 for SZ SPU Controllers on the CCS system bus. Use sequential addressing with no gaps in the device address range to ensure best bus performance. Set address 4 for COBP SPU controllers on the CCS Zone Bus. Table 3, Figure 1, and Figure 2 show SZ and COBP Controller address switch settings.

Comm Bus Terminal Block

+ - Com Provides communication network 0.65 mm (22 AWG) stranded, twisted shielded cable recommended for runs of 1,000 feet maximum

24 VAC Power

Hot AC supply input supply 20–30 VAC (Nominal 24 VAC)

0.8 mm to 1.5 mm2 (20 to 16 AWG) 2-wire

Com 24 VAC power common

1. Dehumidification feature requires the humidity sensor be wired to a Simplicity Variable Air Volume (VAV) control board (LC-RTU1001-0, LC-RTU1002-0 on RTU with factory-installed Hot Gas Reheat [HGR] only).

2. DCV feature requires a CO2 (IAQ) sensor be wired to a Simplicity VAV control board (LC-RTU1001-0 only).3. Economizer requires a DAT, OAT, RAT, OAH, and RAH sensor wired to the Simplicity board.

Table 2: CCS SZ and COBP Controllers Wiring (Part 2 of 2)Terminal Terminal

LabelsFunction and Electrical Ratings/Requirements

Recommended Cable Type and Length

Table 3: SZ and COBP Controller Bus Address Summary

Address Description4 COBP SPU controller (LC-RTU1002-0,

LC-RTU1005-0) on Zone Bus

18–41 Single Zone SPU controller (LC-RTU1001-0, LC-RTU1004-0) on System Bus


4

Figure 1 shows the SPU address switches for the System Manager. Figure 2 shows the SPU address switches for the Zone Coordinator.

Recording Your CCS Zone LocationsUse the Table 7 on page 14 to record mapping locations used to build your CCS.

Figure 1: Address Switch Settings for Units Connected to Zone Coordinator

O N

1

643216

842

128

Address 4

FIG

:CO

BP_

addr

Figure 2: Address Switch Settings for Units Connected to System Manager

O N

1

643216842

128

Address 18

O N

1

643216842

128

Address 19

O N

1

643216842

128

Address 20

O N

1

643216842

128

Address 21

O N

1

643216842

128

Address 22

O N

1

643216842

128

Address 23

O N

1

643216842

128

Address 24

O N1

643216842

128

Address 25

O N

1

643216842

128

Address 26

O N

1

643216842

128

Address 27

O N

1

643216842

128

Address 28

O N

1

643216842

128

Address 29

O N

1

643216842

128

Address 30

O N

1

643216842

128

Address 31

Address 32

Address 33

Address 34

Address 35

Address 36

Address 37

Address 38

O N

1

643216842

128

Address 39

O N

1

643216842

128

Address 40

O N

1

643216842

128

Address 41

O N

1

643216842

128

O N

1

643216842

128

O N1

643216842

128

O N

1

643216842

128

O N

1

643216842

128

O N

1

643216842

128

O N

1

643216842

128 FIG

:sz_

addr


5

Control Board and Wiring DiagramsFigure 3 shows the CCS control board. Figure 4 shows the SPU controller board field terminations. Figure 4 and Figure 5 provide required feature wiring for Simplicity Unit Control Boards (UCBs).

Figure 3: Unit Control Section Components

W 1

P 1 P OCC G Y 1 W 2

Y 2 R SD C

X

Comm Setup Button Last Error

Code Test Reset

Simplicity Control Board

Unit Control Section(Components Removed for Clarity)

O N

1

64 32 16 8 4 2

128

COM - +

J3

Communication Connector

Address Switch

CCS Control Board

Comm Setup Button(Simplicity Control Board

Address Must be 2)

A I 1 C O M J 5

A I 2 C O M J 6

A I 3 C O M J 7

A I 4 C O M J 8

A I 5 C O M J 9

Input Terminals

FIG

:UC

S_C

mpt


6

Table 4: Feature Wiring Required for Simplicity Unit Control Boards, CVRTU Systems

Feature1 Equipment and Simplicity Board Type CombinationRTU, 1A/VAV RTU, Elite Heat Pump, 1A/VAV Split System, 1A

Dehumidification2 X

Demand Control Ventilation (DCV)3

X X X

Occupancy Sensor4 X X X X

Economizer5 X X X

Power Exhaust6 X X X

1. For more information on these features, refer to the Commercial Comfort System (CCS) Operation Overview Technical Bulletin (LIT-12011617).

2. Dehumidification capability requires the Return Air Humidity (RAH) sensor be wired to the Simplicity VAV board.3. DCV requires the CO2 sensor be wired to the Simplicity VAV or Elite board.4. The occupancy sensor connects to BI-1 on the SPU controller board.5. The economizer requires the Supply Air Temperature (SAT), Outdoor Air Temperature (OAT), Return Air Temperature

(RAT), Outdoor Air Humidity (OAH), or Return Air Humidity (RAH) be wired to the Simplicity board.6. Power exhaust requires that the building static pressure sensor be wired to the Simplicity board.

Figure 4: CCS Control Board Field Terminations

L1/L2

GROUND

TX-1(Factory Mounted)

RED

BR

Address Switch

AI1

CO

M

J5

AI2

CO

M

J6

AI3

CO

M

J7

AI4

CO

M

J8

AI5

CO

M

J9

ON

1

643216842

128

COM

-+

J3

1)

2)3)4)

10)9)8)7)6)5)

SPU Controller(Factory Mounted and Wired)

DA-T

RA-T

OA-T

SF-S

FACTORY HARNESS

FILTER-S

(OPTIONAL)

Wire Nut

COMMUNICATION CABLE TO NEXT DEVICE

Note :Observe Polarity

Drain Wire

COMMUNICATION CABLE FROM PREVIOUS DEVICE

2

1

3

4

Sensor

ZN-T(Shown with Optional

Warmer/Cooler Adjustment)(LC-RTU1001-0 only)

(Optional) RA-H+-

(Optional) CO2+-

FACTORY HARNESS

Simplicity UCB

(Factory mounted

and wired)

Note: BO-1 and BO-2 cable required for field-installed valve on LC-RTU1004-0 and LC-RTU1005-0.

Warmer/cooler adjust

Optional Occupancy Sensor (OLS-2100-1)(See Wiring Above)

Note: Zone thermostat controller and communication trunk are wired in the field. All other wiring is completed in the factory.

RIB

GRN

BLK - LINEWHT/BLK RED

NEUTRAL/WHITE

WHT/YELCOM

COM

BI1

Occupancy Sensor Wiring

FIG

:CB

_fld

trm


7

Table 5: Feature Wiring Required for Simplicity Unit Control Boards, COBP Systems

Feature1 Equipment and Simplicity Board Type CombinationRTU, 1A/VAV Heat Pump, 1A/VAV

Dehumidification2 X

Economizer3 X X

Power Exhaust4 X X

1. For more information on these features, refer to the Commercial Comfort System (CCS) Operation Overview Technical Bulletin (LIT-12011617).

2. Dehumidification capability requires the Return Air Humidity (RAH) sensor be wired to the Simplicity VAV board.3. The economizer requires the Supply Air Temperature (SAT), Outdoor Air Temperature (OAT), Return Air Temperature

(RAT), Outdoor Air Humidity (OAH), or Return Air Humidity (RAH) be wired to the Simplicity board.4. Power exhaust requires that the building static pressure sensor be wired to the Simplicity board.


8

Figure 5 shows the SPU controller communication riser.

Figure 5: RTU Controller - Typical System Communication Riser

S1 S2

J8 J7 J6

System Bus

Zone Bus

COM - + COM - +COM 24V

On

Off

24VA

C

CO

M

CO

M

SB-

SB+

ZB+

ZB-

CO

M

EOL

ON

Off

EOLON

J8 J7 J6

System Bus Zone Bus

COM - + COM - +COM

On

Off

24VA

C

CO

M

CO

M

SB-

SB+

ZB+

ZB-

CO

M

EOL

ON

Off

EOLON


Input Terminals

Address Switch

AI1

COM

J5

AI2

CO

M

J6

AI3

CO

M

J7

AI4

CO

M

J8

AI5

CO

M

J9

O N

1

643216

842

128

COM

-+

J3


Input Terminals

Address Switch

AI1

COM

J5

AI2

CO

M

J6

AI3

CO

M

J7

AI4

CO

M

J8

AI5

CO

M

J9

O N

1

643216842

128

COM

-+

J3

CommunicationConnector

Input Terminals

Address Switch

AI1

COM

J5

AI2

CO

M

J6

AI3

CO

M

J7

AI4

CO

M

J8

AI5

CO

M

J9

O N

1

643216

842

128

COM

-+

J3

COM

-+

J2

COMAI1

AI2

COM

AI3

AI4

164 32 16 8 4 2

128

ON

24VC

OM

24VCO

M

COM

-+

J2

COMAI1

AI2

COM

AI3

AI4

164 32 16 8 4 2

128

ON

24VC

OM

24VCO

M

Wire NutDrain Wire

Tape back Drain Wire

Zone Damper

Zone Coordinator Termination Board

System Manager Termination Board

Zone BusCommunication Trunk

Note: Communication trunk must be22 AWG (0.65 mm) 3-conductor twisted, shielded cable with drain wire.

Note: Ground the drain wire at the end of the communication trunk. Do not allow the drain wire to contact exposed metal.

DrainWireAddress 6

Address 5

BypassDamper

COBPSingle Packaged Unit

Wire NutDrain Wire

Address 4

Address 18 Address 19Single Zone Unit Single Zone Unit

DrainWire

IOM Module

Address 5

DrainWire

Drain Wire(Tape Back) Note: Ground the drain wire at

the end of the communication trunk. Do not allow the drain wire to contact exposed metal.

System BusCommunication Trunk

S2S1

24V

FIG

:cm

n_ris

er


9

End-of-Line (EOL) TerminationsDaisy-chained RS485 protocol networks require End-of-Line (EOL) termination to reduce interference. Interference is caused by signal reflection that occurs when data transmissions reach the end of a bus segment and bounce back (Figure 6). The high baud rates on MS/TP bus applications require robust EOL termination and strict adherence to the EOL termination rules.

On a CCS System bus or Zone bus, only one EOL termination is required due to the fewer number of devices on one bus and the shorter wiring length. Specifically, the System bus must always have a System Manager as the EOL device, and the Zone bus must always have a Zone Coordinator as the EOL device. Figure 7 shows a CCS EOL wiring example.

Figure 6: Interference

No EOL = No Signal Cushioning (Bounce Back and Noise)

NoEOL

EOL

EOL Provides Signal Cushioning (No Bounce Back)

FIG

:intrf

rnc

Figure 7: CCS EOL Wiring Example

System Manager

System Bus

CO

M

SB-

SB+

EOLON

ZoneBus

CO

M

ZB-

ZB+

EOLON

COM

24V

Modem

LANTo 24 VAC

To PhoneLine

To EthernetHub

COBP Zone Coordinator

System Bus

CO

M

SB-

SB+

EOLON

ZoneBus

CO

M

ZB-

ZB+

EOLON

COM

24V

tape

off

LANTo 24 VAC

tape

off

To Other System Bus Devices

COBP Zone ControllerC

OM

- +

COM

24VAI-1To 24VAC

Other Zone Controllers

COM

AI-2

BO-4

BO-3To Field-added Supplemental Zone Heat

Zone Sensor

1 2 3 4

COBP Zone Controller

CO

M

- +

COM

24VAI-1To 24VAC

COM

AI-2

BO-4

BO-3To Field-added Supplemental Zone Heat

Zone Sensor

1 2 3 4

Bypass Controller

CO

M

- +

COM

24V

AI-1

To 24 VAC

COM+5V

(+)HI

(- )LO

Tubing toSupply Plenum Pressure

Tubing toSpace Pressure

COBP Unit Controller

CO

M

- +

Simplicity Board

Binary&

ModBus

Connect this end of the drain wire to cabinet ground.

Other Zone Controllers

Zone Coordinator must be EOL for zone busSystem Manager

must be EOLfor system bus

Static PressureSensor

FIG

:CO

BP_

EOL


10

OperationThe CCS SZ and COBP Controllers are factory preconfigured for different operating sequences based upon the product code number you select (for example, selecting LC-RTU1001-0 or LC-RTU1004-0 for single zone applications, or LC-RTU1002-0 or LC-RTU1005-0 for change-over bypass applications). You do not need to configure the controller.

For detailed information on CCS system operation, including dehumidification capability, DCV, occupancy sensing, and general operating modes, refer to the Commercial Comfort System (CCS) Operation Overview Technical Bulletin (LIT-12011617).

TroubleshootingUse the following information to troubleshoot the SZ or COBP SPU Controller.

Power Status LEDA green LED shows the power supply status to the SZ or COBP SPU controller. See Table 6 for a description of modes.

Communication Bus ProblemsSeveral factors may influence the behavior of the communication bus. In addition, certain problems can affect the bus in multiple ways and have multiple symptoms, which makes the exact diagnosis difficult. For example, duplicate addresses on the bus can degrade performance, make the device go offline, or stop communication completely.

Incomplete AddressThe SZ SPU controller must have the address switch set to a range between 18–41 on the system communication bus. The COBP SPU controller must have the address switch set to 4 on the zone communication bus. Other settings prevent the SPU from communicating on the System Communication bus.

Duplicate AddressesTwo or more devices on a communication bus cannot have the same address. For example, two SPUs on the System communication bus cannot both have the address 18. If two devices on the same bus have the same address, performance can degrade or serious communication problems may occur. These problems include the devices not coming online or all communication stopping completely.

Check for duplicate addresses in the following ways depending on the severity of the situation:

• If the bus performance is degraded, check the address switch settings at the devices with unreliable communications.

• If a specific device is not communicating, remove the device with communication problems and check if the device address remains online at the System Manager or Zone Coordinator.

• If the bus communication problems are severe, and no communication is present (or if you cannot determine where communication is unreliable), partition (disconnect and isolate a portion of the bus for testing purposes) and test the bus portion connected to the System Manager and Zone Coordinator controllers.

Fan Operation ProblemsIf you start up the SPU and the fan does not run, the Simplicity® control board may not be communicating with the controller. The Simplicity control board must be set to address 2 on the MODBUS® network to communicate with the SPU controller. You can verify the address setting by following one simple step and observing the LED behavior.

On the Simplicity control board, press the COMM SETUP button twice in a half-second interval. After about 5 seconds, the green LED indicates the current address of the board:

• If the LED blinks once, the address is 1 and must be reset. Press the COMM SETUP button once to move to address 2.

• If the LED blinks twice, the address is set correctly at 2.

• If the LED blinks three times, the address is incorrectly set to 3. Press the COMM SETUP button once to move to address 2.

Table 6: Status LED for Power (PWR)Mode DescriptionOff No Power

On Power is supplied by Primary Voltage (Normal operation)


11

Within a few seconds, MODBUS communication between the Simplicity control board and SPU controller restores and the fan starts. If the fan does not start, repeat the process or troubleshoot the system for communication problems (see Correcting Physical Communication Bus Problems).

Correcting Physical Communication Bus ProblemsThe communication bus is subject to a number of physical factors that can affect performance. Consider the following list of common physical problems that affect the communications bus:

• Check wires

- Verify wire is 22 AWG (0.65 mm) 3-conductor, twisted, shielded cable.

- Verify shield is continuous and hard-grounded at one end.

• Check wiring

- Check for and eliminate T-Taps (wire configurations that create a T shape) and star configurations.

- Ensure bus is wired in daisy-chain fashion.

- Verify that appropriate devices have three wires entering and exiting each terminal (devices at the ends of the trunk do not have this wiring).

• Check EOL switch settings

- Verify the zone bus EOL switch on the Zone Coordinator is set to ON and the Zone Coordinator is located at the end of the zone bus trunk.

- Verify that only the EOL switch at the end of the system bus is set to ON and all other system bus EOL switches are set to OFF.

• Check connections, polarity, and lengths

- Verify communications loops are less than approximately 304 m (1,000 ft) total in length

- If you are using one transformer to power multiple devices, verify the device 24 VAC power connection follows the polarity of the common and 24 V terminations (see Power Wiring).

• Check for opens and shorts

• Check terminations

• Check addresses

- Check for duplicate addresses

- Verify the address range is sequential

• Check for sources of interference

• Check status LED to verify power at the controller

• Check bus voltages:

- (+) to COM must be within 2.0 to 3.0 VDC

- (-) to COM must be within 1.5 to 2.54 VDC

- (+) to (-) must be within 0.3 to 1.0 VDC

Note: Values may fluctuate due to ongoing communications; this operation is normal provided the voltage is within the defined range.

Repair InformationIf the Single-Zone or Change-over Bypass Single Packaged Unit Controller fails to operate within its specifications, replace the unit. For a replacement controller, contact the nearest Johnson Controls® representative.


12

Technical Specifications CCS Single-Zone and Change-Over Bypass Single Packaged Unit ControllersProduct Code Number LC-RTU1001-0: Single-Zone Single Packaged Unit Controller for RTU, Heat Pump, and

Split System EquipmentLC-RTU1002-0: Change-over Bypass Single Packaged Unit Controller for RTU, Heat Pump, and Split System EquipmentLC-RTU1004-0: Single-Zone Single Packaged Unit Controller for Split System Equipment and Field-Installed Hot Water or Steam Coil HeatLC-RTU1005-0: Change-over Bypass Single Packaged Unit Controller for Split System Equipment and Field-Installed Hot Water or Steam Coil Heat

Power Supply Requirement 20–30 VAC at 50 to 60 Hz, Class 2 Power Supply or Safety Extra-Low Voltage (SELV) at 50/60 Hz (20 VAC minimum)

Power Consumption 3 VA (Not including external load)

Ambient Operating Conditions -40 to 70°C (-40 to 158°F); 10 to 90% RH condensing

Ambient Storage Conditions -40 to 85°C (-40 to 185°F); 10 to 90% RH

Processor 20 MHz Renesas® H8S2398 processor

Memory 1 MB Flash Nonvolatile Memory for Operating System, Configuration Data, and Operations Data Storage and Backup512k Synchronous Random Access Memory (SRAM) for Operations Data Dynamic Memory

Housing Plastic Housing Material: ABS + Polycarbonate UL94-5VBProtection: IP20 (IEC 60529)

Mounting On Flat Surface with Screws

Dimensions(Height x Width x Depth

140 x 140 x 25 mm (5-1/2 x 5-1/2 x 1 in.)

Shipping Weight 0.14 kg (0.30 lb)

Compliance United StatesUL Listed, File E107041, CCN PAZX, UL 916FCC Compliant to CFR47, Part 15, Subpart B, Class A

CanadaUL Listed, File E107041, CCN PAZX7, CAN/CSA C22.2 No. 205, Signal EquipmentIndustry Canada Compliant, ICES-003


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Table 7: CCS ZonesAddress Description Location/Name4181920212223242526272829303132333435363738394041

Published in U.S.A. www.johnsoncontrols.com


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Metasys® and Johnson Controls® are registered trademarks of Johnson Controls, Inc.All other marks herein are the marks of their respective owners. © 2011 Johnson Controls, Inc.

Building Efficiency507 E. Michigan Street, Milwaukee, WI 53202

ccs single-zone and change-over bypass (cobp) single

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