(COBP) Single Packaged Unit (SPU)

(COBP) Single Packaged Unit (SPU)
CCS Single-Zone and Change-Over Bypass (COBP)
Single Packaged Unit (SPU) Controllers
LIT-12011544
Installation Instructions
Release 1.2
Issued July 15, 2011
Supersedes June 30, 2010
LC-RTU1001-0, LC-RTU1002-0,
LC-RTU1004-0, LC-RTU1005-0
Refer to the QuickLIT Web site for the most up-to-date version of this document.
Applications
North American Emissions Compliance
The 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.
United States
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.
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.
Canada
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.
Installation
Special Tools Needed
•
wire strippers
•
small flat-head screwdriver
•
22 AWG (0.65 mm) 3-conductor, twisted, shielded
cable with a drain wire
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.
Note: This drain wire is used only to group the
shielded cable. Do not use this drain wire as a
connection to the board.
•
wire nuts for 22 AWG drain wire
•
electrical tape
CCS Single-Zone and Change-Over Bypass (COBP) Single Packaged Unit (SPU)
Controllers Installation Instructions
1
Accessories
Wiring
Table 1 lists the SZ and COBP SPU Controller
accessories.
Field Wiring Connections
Table 1: SPU Controller Accessories
Product 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
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
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.
Mounting
The 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.
In 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 Wiring
The 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.
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.
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.
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.
2
CCS Single-Zone and Change-Over Bypass (COBP) Single Packaged Unit (SPU) Controllers Installation
Instructions
Wire Gauges and Lengths
Table 2 outlines the controller wiring details.
Table 2: CCS SZ and COBP Controllers Wiring (Part 1 of 2)
Terminal
Terminal
Labels
Function and Electrical Ratings/
Requirements
Recommended Cable Type and Length
Analog
Input (AI)
AI-1
AI 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-2
AI 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-3
AI Com
Not Available
Not Available
AI-4
AI Com
Provides analog input connection for
Relative Humidity (RH) (optional)
0 to 10 VDC input1
0.65 mm (22 AWG) stranded, 3-wire twisted cable
recommended for runs of < 30 m (99 ft)
AI-5
AI Com
Provides analog input connection for
CO2 sensor (optional)
0.65 mm (22 AWG) stranded, 3-wire twisted cable
recommended for runs of < 30 m (99 ft)
0 to 10 VDC input2
Binary
Input (BI)
Binary
Output
(BO)
AI-6
AI 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-8
AI Com
Provides analog input connection for
outdoor temperature sensor - 10k ohm
Type 3 thermistor3
Factory Wired
BI-1
BI Com
Provides a binary input for occupancy
sensor dry contact
0.65 mm (22 AWG) stranded, 2-wire twisted cable
recommended for runs of < 30 m (99 ft)
BI-2
BI Com
Provides binary input connection for fan
status - dry contact input
0.65 mm (22 AWG) stranded, 2-wire twisted cable
recommended for runs of < 30 m (99 ft)
BI-3
BI-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)
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-2
BO Com
Provides binary output connection for
2nd stage electric heat (LC-RTU10010, 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-3
BO Com
Provides binary output connection for
occupancy command
Factory Wired
BO-4
BO Com
Provides binary output connection for
1st stage cooling
Factory Wired
CCS Single-Zone and Change-Over Bypass (COBP) Single Packaged Unit (SPU) Controllers Installation
Instructions
3
Table 2: CCS SZ and COBP Controllers Wiring (Part 2 of 2)
Terminal
Terminal
Labels
Function and Electrical Ratings/
Requirements
Recommended Cable Type and Length
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.
2.
3.
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).
DCV feature requires a CO2 (IAQ) sensor be wired to a Simplicity VAV control board (LC-RTU1001-0 only).
Economizer requires a DAT, OAT, RAT, OAH, and RAH sensor wired to the Simplicity board.
Setup and Adjustments
To 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.
4
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 Bus
Determining the Bus Address
The 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.
Table 3: SZ and COBP Controller Bus Address
Summary
Address
Description
4
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
CCS Single-Zone and Change-Over Bypass (COBP) Single Packaged Unit (SPU) Controllers Installation
Instructions
Figure 1 shows the SPU address switches for the
System Manager. Figure 2 shows the SPU address
switches for the Zone Coordinator.
1
2
4
8
16
32
64
128
Recording Your CCS Zone Locations
Use the Table 7 on page 14 to record mapping
locations used to build your CCS.
O
N
FIG:COBP_addr
Address 4
Figure 1: Address Switch Settings for
Units Connected to Zone Coordinator
1
2
4
8
16
32
64
128
O
N
O
N
Address 40
1
2
4
8
16
32
64
128
Address 41
Address 35
O
N
O
N
Address 39
1
2
4
8
16
32
64
128
O
N
O
N
O
N
Address 34
1
2
4
8
16
32
64
128
1
2
4
8
16
32
64
128
Address 36
O
N
O
N
1
2
4
8
16
32
64
128
Address 37
Address 31
1
2
4
8
16
32
64
128
Address 38
FIG:sz_addr
1
2
4
8
16
32
64
128
Address 33
1
2
4
8
16
32
64
128
O
N
Address 30
O
N
Address 24
O
N
Address 29
1
2
4
8
16
32
64
128
O
N
Address 23
1
2
4
8
16
32
64
128
Address 28
1
2
4
8
16
32
64
128
O
N
Address 22
1
2
4
8
16
32
64
128
Address 27
1
2
4
8
16
32
64
128
O
N
Address 21
1
2
4
8
16
32
64
128
1
2
4
8
16
32
64
128
O
N
O
N
Address 20
1
2
4
8
16
32
64
128
Address 26
1
2
4
8
16
32
64
128
Address 32
O
N
O
N
1
2
4
8
16
32
64
128
O
N
Address 19
1
2
4
8
16
32
64
128
1
2
4
8
16
32
64
128
O
N
1
2
4
8
16
32
64
128
Address 25
O
N
1
2
4
8
16
32
64
128
O
N
Address 18
O
N
1
2
4
8
16
32
64
128
Figure 2: Address Switch Settings for Units Connected to System Manager
CCS Single-Zone and Change-Over Bypass (COBP) Single Packaged Unit (SPU) Controllers Installation
Instructions
5
Control Board and Wiring Diagrams
Figure 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).
Communication
Connector
COM
+
J3
Address
Switch
9
J
1
2
4
8
16
32
64
128
8
J
ON
7
J
6
J
5
J
CCS Control Board
M
O
C
I5
A
M
O
C
4
IA
M
O
C
3
IA
M
O
C
2
IA
M
O
C
1
IA
Input
Terminals
Comm Setup Button
(Simplicity Control Board
Address Must be 2)
Comm Setup
Button
Last Error
Code
FIG:UCS_Cmpt
W1
W2
Y1
G
OCC
P
P1
Y2
X
R
SD
C
Test
Reset
Unit Control Section
(Components Removed for Clarity)
Simplicity Control Board
Figure 3: Unit Control Section Components
6
CCS Single-Zone and Change-Over Bypass (COBP) Single Packaged Unit (SPU) Controllers Installation
Instructions
RIB
WHT/BLK
BLK - LINE
RED
TX-1
(Factory Mounted)
COM
ZN-T
RED
(Shown with Optional
Warmer/Cooler Adjustment)
(LC-RTU1001-0 only)
WHT/YEL
COM
BI1
GRN
L1/L2
BR
NEUTRAL/WHITE
GROUND
1
Sensor
Occupancy Sensor Wiring
2
4
3
+
J9
DA-T
2)
3)
O
N
-
J8
CO2
1)
J7
RA-H
+
J6
-
Note: BO-1 and BO-2 cable
required for field-installed
valve on LC-RTU1004-0
and LC-RTU1005-0.
J5
(Optional)
4)
128
64
32
16
8
4
2
1
Address
Switch
RA-T
Simplicity
UCB
5)
6)
7)
8)
9)
10)
OA-T
(Factory
mounted
and wired)
FACTORY
HARNESS
FACTORY
HARNESS
Optional Occupancy
Sensor (OLS-2100-1)
(See Wiring Above)
COMMUNICATION
CABLE TO NEXT
DEVICE
FILTER-S
+
J3
SF-S
COM
Wire Nut
Note :
Observe
Polarity
SPU Controller
(Factory Mounted and Wired)
(OPTIONAL)
Note: Zone thermostat controller and communication trunk are wired in the field. All
other wiring is completed in the factory.
Drain Wire
COMMUNICATION
CABLE FROM
PREVIOUS
DEVICE
FIG:CB_fldtrm
(Optional)
AI1 COM AI2 COM AI3 COM AI4 COM AI5 COM
Warmer/
cooler
adjust
Figure 4: CCS Control Board Field Terminations
Table 4: Feature Wiring Required for Simplicity Unit Control Boards, CVRTU Systems
Equipment and Simplicity Board Type Combination
Feature1
RTU, 1A/VAV
RTU, Elite
Heat Pump, 1A/VAV
Dehumidification2
X
Demand Control
Ventilation (DCV)3
X
X
X
Occupancy Sensor4
X
X
X
Economizer5
X
X
X
Power Exhaust6
X
X
X
1.
2.
3.
4.
5.
6.
Split System, 1A
X
For more information on these features, refer to the Commercial Comfort System (CCS) Operation Overview Technical
Bulletin (LIT-12011617).
Dehumidification capability requires the Return Air Humidity (RAH) sensor be wired to the Simplicity VAV board.
DCV requires the CO2 sensor be wired to the Simplicity VAV or Elite board.
The occupancy sensor connects to BI-1 on the SPU controller board.
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.
Power exhaust requires that the building static pressure sensor be wired to the Simplicity board.
CCS Single-Zone and Change-Over Bypass (COBP) Single Packaged Unit (SPU) Controllers Installation
Instructions
7
Table 5: Feature Wiring Required for Simplicity Unit Control Boards, COBP Systems
Feature1
Equipment and Simplicity Board Type Combination
RTU, 1A/VAV
Heat Pump, 1A/VAV
Dehumidification2
X
Economizer3
X
X
Power Exhaust4
X
X
1.
2.
3.
4.
8
For more information on these features, refer to the Commercial Comfort System (CCS) Operation Overview Technical
Bulletin (LIT-12011617).
Dehumidification capability requires the Return Air Humidity (RAH) sensor be wired to the Simplicity VAV board.
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.
Power exhaust requires that the building static pressure sensor be wired to the Simplicity board.
CCS Single-Zone and Change-Over Bypass (COBP) Single Packaged Unit (SPU) Controllers Installation
Instructions
Figure 5 shows the SPU controller communication
riser.
C OM
+
ZB
ZB
SB
SB
EOL
COM
COM
+
System Bus Zone Bus
ON
-+
J7
COM
- +
COM 24V
J6
Off
S2
S1
System Bus
Communication Trunk
ON
EOL
On
J8
COM
Off
24VA C
System Manager
Termination Board
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.
C OM
+
ZB
EOL
J7
- +
COM
J6
+
+
Off
Single Zone Unit
COM
J3
+
Input
Terminals
J6
J7
O
N
J8
J9
1
2
4
8
16
32
64
128
Single Zone Unit
Address 18
AI 1 CO M A I 2 CO M AI3 C OM AI 4 C OM
J5
Communication
Connector
Address
Switch
J5
J6
J7
O
N
J8
J9
1
2
4
8
16
32
64
128
AI5 C OM
Address
Switch
AI5 C OM
S2
Tape back
Drain Wire
Wire Nut
Drain Wire
COM
AI 1 CO M A I 2 COM AI3 C OM AI 4 C OM
S1
COM 24V
Communication
Connector
J3
Off
-+
COM
ON
J3
J8
Drain
Wire
Communication
Connector
ZB
On
COM
24VA C
Zone
Bus
C OM
+
System
Bus
SB
EOL
ON
SB
C OM
Zone Coordinator
Termination Board
Input
Terminals
IOM Module
Address 19
Address 5
J5
J6
J7
O
N
J8
AI 1 CO M A I 2 COM A I3 C OM AI 4 C OM
J9
AI5 C OM
1
2
4
8
16
32
64
128
Drain
Wire
Address 4
Address
Switch
Input
Terminals
COBP
Single Packaged Unit
Zone Bus
Communication
Trunk
Note: Communication trunk must be
22 AWG (0.65 mm) 3-conductor
twisted, shielded cable with drain wire.
AI3
COM
AI4
Bypass
Damper
AI1
COM
AI2
O
N
1
2
4
8
16
32
64
128
Address 5
CO M 24V
COM
COM 24V
J2
+
Wire Nut
Drain Wire
AI3
COM
AI4
Zone
Damper
AI1
COM
Address 6
Drain
Wire
1
2
4
8
16
32
64
128
O
N
CO M 24 V
COM
COM 24V
J2
+
Note: Ground the drain wire at
the end of the communication
trunk. Do not allow the drain
wire to contact exposed metal.
FIG:cmn_riser
AI2
Figure 5: RTU Controller - Typical System Communication Riser
CCS Single-Zone and Change-Over Bypass (COBP) Single Packaged Unit (SPU) Controllers Installation
Instructions
9
End-of-Line (EOL) Terminations
No EOL = No Signal Cushioning
(Bounce Back and Noise)
Daisy-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 Master-Slave/Token-Passing (MS/TP) bus
applications require robust EOL termination and strict
adherence to the EOL termination rules.
No
EOL
EOL Provides Signal
Cushioning (No Bounce Back)
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
System Manager
must be EOL
for system bus
Zone
Bus
ZB+
COM
24V
System
Bus
SB+
LAN
SB-
To 24 VAC
COM
ZB+
ZB-
SB+
COM
EOL
O
N
EOL
O
N
COBP Zone Controller
4
3
2
COM
+
AI-1
-
COM
To 24VAC
24V
To Field-added
Supplemental
Zone Heat
BO-3
AI-2
COM
+
-
COM
COM
To 24 VAC
24V
Zone Coordinator
must be EOL for
zone bus
To Other
System Bus
Devices
BO-4
Zone Sensor
To Field-added
Supplemental
Zone Heat
BO-3
AI-2
COM
tap
e
off
BO-4
4
3
2
1
EOL
O
N
1
COBP Zone Controller
AI-1
COBP Zone Coordinator
Zone
Bus
tap
e
off
Zone Sensor
COM
COM
System
Bus
SB-
LAN
EOL
O
N
COM
Modem
ZB-
System Manager
To Phone
Line
To Ethernet
Hub
FIG:intrfrnc
EOL
To 24VAC
24V
Other Zone Controllers
Bypass Controller
COBP Unit Controller
Simplicity Board
Binary
&
ModBus
Other Zone Controllers
Connect this end of the drain
wire to cabinet ground.
FIG:COBP_EOL
24V
+
To 24 VAC
-
+
COM
COM
+5V
COM
AI-1
-
Tubing to
Space Pressure
(+)HI
Static
Pressure
Sensor
(- )LO
COM
Tubing to
Supply Plenum Pressure
Figure 7: CCS EOL Wiring Example
10
CCS Single-Zone and Change-Over Bypass (COBP) Single Packaged Unit (SPU) Controllers Installation
Instructions
Operation
Duplicate Addresses
The 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.
Two 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.
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).
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.
Troubleshooting
Use the following information to troubleshoot the SZ or
COBP SPU Controller.
Power Status LED
A green LED shows the power supply status to the SZ
or COBP SPU controller. See Table 6 for a description
of modes.
Table 6: Status LED for Power (PWR)
Mode
Description
Off
No Power
On
Power is supplied by Primary Voltage
(Normal operation)
Communication Bus Problems
Several 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 Address
The 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.
Fan Operation Problems
If 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.
CCS Single-Zone and Change-Over Bypass (COBP) Single Packaged Unit (SPU) Controllers Installation
Instructions
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).
•
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).
Correcting Physical Communication Bus Problems
The 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 for opens and shorts
•
Check terminations
•
•
Check addresses
•
•
12
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 for duplicate addresses
-
Verify the address range is sequential
•
Check for sources of interference
Check wiring
•
Check status LED to verify power at the controller
-
•
Check bus voltages:
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).
-
(+) 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.
Check EOL switch settings
Repair Information
-
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.
If 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.
-
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.
CCS Single-Zone and Change-Over Bypass (COBP) Single Packaged Unit (SPU) Controllers Installation
Instructions
Technical Specifications
CCS Single-Zone and Change-Over Bypass Single Packaged Unit Controllers
Product Code Number
LC-RTU1001-0: Single-Zone Single Packaged Unit Controller for RTU, Heat Pump, and
Split System Equipment
LC-RTU1002-0: Change-over Bypass Single Packaged Unit Controller for RTU, Heat
Pump, and Split System Equipment
LC-RTU1004-0: Single-Zone Single Packaged Unit Controller for Split System
Equipment and Field-Installed Hot Water or Steam Coil Heat
LC-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 Backup
512k Synchronous Random Access Memory (SRAM) for Operations Data Dynamic
Memory
Housing
Plastic Housing Material: ABS + Polycarbonate UL94-5VB
Protection: 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 States
UL Listed, File E107041, CCN PAZX, UL 916
FCC Compliant to CFR47, Part 15, Subpart B, Class A
Canada
UL Listed, File E107041, CCN PAZX7, CAN/CSA C22.2 No. 205, Signal Equipment
Industry Canada Compliant, ICES-003
CCS Single-Zone and Change-Over Bypass (COBP) Single Packaged Unit (SPU) Controllers Installation
Instructions
13
Table 7: CCS Zones
Address
Description
Location/Name
4
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
Building Efficiency
507 E. Michigan Street, Milwaukee, WI 53202
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.
14
CCS Single-Zone and Change-Over Bypass (COBP) Single Packaged Unit (SPU) Controllers Installation
Instructions
Published in U.S.A.
www.johnsoncontrols.com
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising