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Tracer TD7
User Manual
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User Manual
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Trane Tracer TD7 User Manual

RLC-SVU007D-GB
Tracer™ TD7 with UC 800
User Guide
Original instructions
Table of Contents
2 © 2018 Trane
General Recommendations .............................................................................. 3
Installer-Supplied Components ........................................................................ 4
Interconnecting Wiring ...................................................................................... 4
Chilled Water Pump Control ........................................................................................... 4
Lead Lag Dual pump ....................................................................................................... 4
Programmable Relays ....................................................................................... 6
Relay Assignments Using ................................................................................. 7
Tracer™ TU ...................................................................................................................... 7
Low Voltage Wiring ............................................................................................ 8
Emergency Stop .............................................................................................................. 8
External Auto/Stop .......................................................................................................... 8
Ice Making (Optional) ........................................................................................ 8
External Setpoints & Capacity Outputs (Optional) ...................................... 10
External Chilled Water Setpoint (ECWS) ..................................................................... 10
External Current Limit Setpoint (ECLS) ....................................................................... 11
ECWS and ECLS Analog Input Signal Wiring Details ................................................. 12
Chilled Water Reset (CWR) .............................................................................. 13
Smart Communication Protocol .................................................................... 16
LonTalk™ Interface (LCI-C) ........................................................................................... 16
BACnet Interface (BCNT) ............................................................................................... 16
BACnet Testing Laboratory (BTL) Certification ........................................................... 16
ModBus RTU Interface .................................................................................................. 16
Wiring and Port Descriptions for MODBUS, BACnet and LonTalk .............. 17
Smart Com protocol ...................................................................................................... 17
Rotary Switches ............................................................................................................. 17
LED Description and Operation .................................................................................... 18
Tracer TD7 Operator Interface ......................................................................... 19
Tracer™ TU ....................................................................................................... 20
3
As you review this manual, keep in mind that:
• All field-installed wiring must conform to European guidelines and any applicable local codes. Be sure to satisfy proper equipment grounding requirements per European guidelines.
• Compressor motor and unit electrical data (including motor kW, voltage utilization range, rated load amps) is listed on the chiller nameplate.
• All field-installed wiring must be checked for proper terminations, and for possible shorts or grounds.
Note:
Always refer to wiring diagrams shipped with unit submittal for specific electrical schematic and connection information.
WARNING:
Proper field wiring and grounding required!
All field wiring MUST be performed by qualified personnel.
Improperly installed or improperly grounded machines can cause FIRE and ELECTROCUTION hazards
To avoid these hazards, you MUST follow requirements in local electrical codes.
Failure to follow cade could result in death or serious injury.
WARNING:
Hazardous voltage w/capacitors!
Disconnect all electric power, including remote disconnects and discharge all motor start/run and AFD (Adaptive Frequency™ Drive) capacitors before servicing.
Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized.
• For variable frequency drives or others energy storing component provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors. Verify with an appropriate voltmeter that all capacitors have discharged.
• DC bus capacitors retain hazardous voltages after input power has been disconnected. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. After disconnecting input power, wait five (5) minutes for units which are equipped with EC fans and wait twenty (20) minutes for units which are equipped with variable frequency drive (0V DC) before touching any internal components
Failure to follow these instructions could result in death or serious injury.
For additional information regarding the safe discharge of capacitors, see “Adaptive Frequency™ Drive (AFD3) Capacitor Discharge,” and BAS-SVX19*.
WARNING!
Hazardous Voltage - Pressurized Burning Fluid:
Before removing compressor terminal box cover for servicing, or servicing power side of control panel, CLOSE COMPRESSOR DISCHARGE SERVICE VALVE and disconnect all electric power including remote disconnects. Discharge all motor start/run capacitors. Follow lockout/tagout procedures to ensure the power cannot be inadvertently energized. Verify with an appropriate voltmeter that all capacitors have discharged.
The compressor contains hot, pressurized refrigerant. Motor terminals act as a seal against this refrigerant. Care should be taken when servicing NOT to damage or loosen motor terminals.
Do not operate compressor without terminal box cover in place. Failure to follow all electrical safety precautions could result in death or serious injury.
For additional information regarding the safe discharge of capacitors, see “Adaptive Frequency™ Drive (AFD3) Capacitor Discharge,” and BAS-SVX19*.
NOTICE:
Use Copper Conductors Only!
Unit terminals are not designed to accept other types of conductors. Failure to use copper conductors could result in equipment damage.
Important:
To prevent control malfunctions, do not run low voltage wiring (<30 V) in conduit with conductors carrying more than 30 volts.
WARNING!
Discharge Time:
Frequency converters contain DC-link capacitors that can remain charged even when the frequency converter is not powered. To avoid electrical hazards, disconnect AC mains, any permanent magnet type motors, and any remote DC link power supplies, including battery backups, UPS and DC-link connections to other frequency converters. Wait for the capacitors to fully discharge before performing any service or repair work. The amount of wait time is listed in the Discharge Time table. Failure to wait the specified time after power has been removed before doing service or repair could result in death or serious injury.
Table 1 - Capacitor Discharge Times
Voltage Power
Minimum waiting
time [min]
380 – 500 V 90 – 250 kW 20
315 – 800 kW 40
General Recommendations
4
Installer-Supplied Components / Interconnecting Wiring
Installer-Supplied Components
Customer wiring interface connections are shown in the electrical schematics and connection diagrams that are shipped with the unit. The installer must provide the following components if not ordered with the unit:
• Power supply wiring (in conduit) for all field-wired connections.
• All control (interconnecting) wiring (in conduit) for field supplied devices.
• Fused-disconnect switches or circuit breakers.
Interconnecting Wiring
Chilled Water Pump Control
NOTICE:
Equipment Damage!
If the microprocessor calls for a pump to start and water does not flow, the evaporator may be damaged catastrophically. It is the responsibility of the installing contractor and/or the customer to ensure that a pump will always be running when called upon by the chiller controls.
An evaporator water pump output relay closes when the chiller is given a signal to go into the Auto mode of operation from any source. The contact is opened to turn off the pump in the event of most machine level diagnostics to prevent pump overheat.
The relay output is required to operate the Evaporator
Water Pump (EWP) contactor. and Heat recovery Water Pump (HRWP) (multipipe unit) Contacts should be compatible with 115/240 VAC control circuit. Normally, the EWP/HRWP relay follows the AUTO mode of the chiller. Whenever the unit has no diagnostics and is in the AUTO mode, regardless of where the auto command is coming from, the normally open relay is energized. When the unit exits the AUTO mode, the relay is timed to open in an adjustable (using TU or TD7) 0 to 30 minutes.
The non-AUTO modes, in which the pumps are stopped, includes Reset, Stop, External Stop, Remote Display Stop, Stopped by Tracer, Start Inhibited by Low Ambient Temp, and Ice Making complete (if applicable).
Table 2 - Pump relay operation
Chiller Mode Relay Operation
Auto Instant Close
Ice Making Instant Close
Tracer Override Close
Stop Timed Open
Ice Complete Instant Open
Diagnostics Instant Open
When going from Stop to Auto, the Evaporator Water Pump relay is energized. Water flow switch is activating, and flow status information back after 15 seconds.
Pump relay Operation for multi-pipe unit
Priority mode
Evaporator Heat Recovery
Pump command Pump command
Cooling Only Active OFF
Heating Only OFF Active
Cooling Priority Active Active
Heating Priority Active Active
Heat Recovery Priority Active Active
Max Capacity Priority Active Active
Unit mode Evaporator or Heat recovery Pump Relay
Auto Active
Tracer Override OFF
Stop Active
Diagnostic Active
5
Installer-Supplied Components / Interconnecting Wiring
If water flow is not established in 20 minutes (for normal transition), the UC800 de-energizes the Pump relay and generates a non-latching diagnostic. If flow returns (e.g. someone else is controlling the pump), the diagnostic is cleared, the Pump is re-energized, and normal control resumed.
If evaporator water flow is lost once it had been established, the EWP relay remains energized and a non-latching diagnostic is generated. If flow returns, the diagnostic is cleared and the unit returns to normal operation. In general, when there is either a non-latching or latching diagnostic, the Pump relay is turned off as though there was a zero time delay. Exceptions whereby the relay continues to be energized occur with:
• Low Water Temp. diagnostic (non-latching) (Unless also accompanied by a Leaving Water Temperature Sensor Diagnostic)
OR
• Loss of Water Flow diagnostic (non-latching) and the unit is in the AUTO mode, after initially having proven water flow.
Lead Lag Dual Pump
The running pump is changed each time the unit is switched on.
6
A programmable relay concept provides for enunciation of certain events or states of the chiller, selected from a list of likely needs, while only using four physical output relays, as shown in the field wiring diagram.
The four relays are provided (generally with a Quad Relay Output LLID) as part of the Programmable Relay Option. The relays contacts are isolated Form C (SPDT), suitable for use with 120 VAC circuits drawing up to
2.8 amps inductive, 7.2 amps resistive, or 1/3 HP and for 240 VAC circuits drawing up to 0.5 amp resistive.
The list of events/states that can be assigned to the programmable relays can be found in Table (…) Chiller events/Status description. The relay will be energized when the event/state occurs.
Table 3 - Chiller event/status descriptions
Alarm - Latching This output is true whenever there is any active latching shutdown diagnostic that targets the Unit, Circuit,
or any of the Compressors on a circuit.
Alarm - NonLatching This output is true whenever there is any active non-latching shutdown diagnostic that targets the Unit,
Circuit, or any of the Compressors on a circuit.
Alarm This output is true whenever there is any active latching or non-latching shutdown diagnostic that targets
the Unit, Circuit, or any of the Compressors on a circuit.
Alarm Ckt x This output is true whenever there is any active latching or non-latching shutdown diagnostic that targets
Circuit x, or any of the Compressors on Circuit x.
Unit Limit Mode This output is true whenever a circuit on the unit has been running in one of the limit modes continuously
for the Limit Relay debounce time. A given limit or overlapping of different limits must be in effect continuously for the debounce time prior to the output becoming true. It will become false if no limits are present for the debounce time.
Compressor Running The output is true whenever any compressor is running.
Circuit x Running The output is true whenever any compressor of Circuit x is running.
Ice Building This output is true when Ice Building status is active.
Maximum Capacity The output is true whenever the unit has reached maximum capacity continuously for the Max Capacity
Relay s time. The output is false when the unit is not at maximum capacity continuously for the lter time.
Evaporator Water Freeze Avoidance Request
This relay output is energized any time either the Low Evaporator Water Temperature – Unit Off or the Low Evaporator Temperature Ckt x – Unit Off diagnostics are active. This relay is intended for use as an
external interlock for a eld engineered and provided solution to mitigate the freeze danger implied by
these diagnostics. Generally, this would be used in cases where operation of the evaporator water pump is unacceptable due to the system constraints, (i.e. such as mixing unconditioned warm water with controlled supply water as provided by other parallel chillers. The relay’s output can provide the method to close bypass valves so the circulation becomes local to the evap and excludes the load, or can be used to defeat
the evap pump override entirely while initiating an independent source of heat / ow to the evap.
None: On Multi-pipe units, it mandatory to connect Evaporator Freeze avoidance relay output to pump or valve
that rapidly establish evaporator water ow even if unit is in AUTO mode.
This selection is desirable to provide an easy way for a customer to defeat the effect of the relay, if it has already been wired. For instance, if the relay was normally programmed as an “alarm” relay, and was wired to a claxon, it may be desirable to temporarily defeat the feature without changing wiring.
Service request (for Unit, Compressor(s) or water pump):
This relay will be energized when at least one Maintenance alert condition (refer to Service required
message specication) occurs, as long as at least one of associated informational diagnostic(s) will be
active.
Warning
The output is true whenever there is any active warning diagnostic that is associated with the Unit, Circuit, or any of the compressors on a circuit.
Programmable Relays
7
Relay Assignments Using
Tracer™ TU
Tracer™ TU Service Tool is used to install the Programmable Relay Option package and assign any of the above lists of events or status to each of the four relays provided with the option. (See “Tracer™ TU,” for more information on the Tracer TU service tool) The relays to be programmed are referred to by the relay’s terminal numbers on the LLID board 1A10.
The eight available relays in the Alarm Package Option are assigned with the following defaults as follows:
Table 4 - Alarm Package Relay option Default assignments
LLID Name
LLD Software Relay Designation
Output Name Default
Operating Status Programmable Relays Module 1
Relay 0 Status Relay 1, J2-1,2,3 Evaporator Water Freeze Avoidance Request
Relay 1 Status Relay 2, J2-4,5,6 Maximum Capacity
Relay 2 Status Relay 3, J2-7,8,9 Compressor Running
Relay 3 Status Relay 4, J2-10,11,12 Latching Alarm
Operating Status Programmable Relays Module 2
Relay 4 Status Relay 5, J2-1,2,3 Alarm Ckt 2
Relay 5 Status Relay 6, J2-4,5,6 Alarm Ckt 1
Relay 6 Status Relay 7, J2-7,8,9 Alarm (Latching or Non latching)
Relay 7 Status Relay 8, J2-10,11,12 Non Latching Alarm
If any of the Alarm/Status relays are used, provide electrical power, 115 VAC with fused-disconnect to the panel and wire through the appropriate relays (terminals on 1A10). Provide wiring (switched hot, neutral, and ground connections) to the remote annunciation devices. Do not use power from the chiller’s control panel transformer to power these remote devices. Refer to the field diagrams which are shipped with the unit.
8
Low Voltage Wiring / Ice Making (Optional)
Low Voltage Wiring
The remote devices described below require low voltage wiring. All wiring to and from these remote input devices to the Control Panel must be made with shielded, twisted pair conductors. Be sure to ground the shielding only at the panel.
Important:
To prevent control malfunctions, do not run low voltage wiring (<30 V) in conduit with conductors carrying more than 30 volts.
Emergency Stop
UC800 provides auxiliary control for a customer specified/installed latching trip out. When customer furnished remote contact 6S2, the chiller will run normally when the contact is closed. When the contact opens, the unit will stop and a manually resettable diagnostic is generated. This condition requires manual reset at the chiller switch on the front of the control panel.
This customer-furnished contact must be compatible with 24 VDC, 12 mA resistive load.
External Auto/Stop
If the unit requires external Auto/Stop function, the installer must provide remote contact 6S1.
The chiller will run normally when the contact is closed. When contact opens, the compressor(s), if operating, will go to the RUN: UNLOAD operating mode and cycle off. Unit operation will be inhibited. Closure of the contact will permit the unit to return to normal operation.
Field-supplied contacts for all low voltage connections must be compatible with dry circuit 24 VDC for a 12mA resistive load. Refer to the field diagrams that are shipped with the unit.
Ice Making (Optional)
When the Ice Making Command is removed (i.e. all the installed Ice Making inputs are set to “auto”), the compressors shall be stopped after the run unload period (if not already stopped due to Ice Making Complete). The chiller shall return to normal Auto mode of operation, and allowed to restart only after enforcing a 2 minute delay called the “Ice to Normal Transition time”. During this inhibit, the Evaporator water flow request shall be commanded on. After the delay, the chiller can restart again per the differential to start and the normal Chilled Water Setpoint (or Hot Water Setpoint – if in Heating Mode). The Ice To Normal Transition inhibit shall be annunciated as a Chiller Submode and a countdown timer showing the remaining time left shall be displayed.
Ice Making Configuration:
Ice Making is configured through TU, and there shall be two installation options:
1. Not Installed
2. Installed with Hardware
Ice Making: Not Installed
If the Ice Building Configuration item is set to ‘Not Installed’, the application will not build the Ice Making objects, and will require none of the Ice Making specific LLIDS.
Ice Making: Installed with Hardware
If the Ice Making Configuration item is set to ‘Installed’, the application will require the following LLIDs:
• External Ice Making Input (Dual Low Voltage Binary Input)
Ice Making Setpoints:
After Ice Making is configured, there shall be three Ice Making Settings or Setpoints:
1. Ice Making Command
2. Ice Making Enable/Disable
3. Ice Making Termination Setpoint
The ice making setpoints can all be manipulated through TU. Some of the Setpoints can be manipulated with User Interface on the Display, the External Hardware Interface BAS (if a BAS is installed).
The setpoints associated with ice making are explained in more detail below.
Ice Making Command
This is the command to enter ice making. This setting is defined as an Auto/On settings. Setting this to On will command the application into ice building if ice building is enabled and the Chiller is in the “Auto” command mode. Setting the Ice Making command to Auto will command the application to follow the next priority functional mode.
Regardless of the setting of the Setpoint Source (see setpoint arbitration.doc) any of the following 4 signals can combine to comprise the Ice Building Command (assuming they are each installed).
Contact closure input for External Ice Making Command Front Panel Ice Making Command (also writable from TU Lontalk Communicated Ice Making Command (LCI-C, BACnet, Modbus)
Time of Day scheduler
All ice making signals have to be turned to “auto” to be able to turn back Ice Making Command to “Auto” mode.
The overall Ice Making Command, must be toggled from “Ice Making”, to “Auto” to “Ice Making” again, before Ice Making can be entered a second time.
Ice Making Enable/Disable setting
This setting does not start or stop ice building. This is the command to enable or disable the entire ice building feature. It can only be set through the Display or TU. The Ice Making Command starts and stops ice building.
Ice Making Termination setpoint
This setpoint controls when Ice Making is complete. If the Entering Water Temperature decreases below this setpoint with no deadband Ice Making will be deemed complete. This setpoint has a range of –6.7°C (20°F) to 0°C (32°F) with a default of -2.8°C (27°F).
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