Manuale d’uso / di manutenzione del prodotto LO del fabbricante Trane
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Installation Operation Maintenance UniT rane ® Fan-Coil Room Conditioners Force Flo™ Cabinet Heaters Sizes 02-12 Low V ertical Fan-Coils Sizes 03-06 UNT -IOM-6 Supercedes UNT -IOM-5 April 2000 Mode.
2 UNT -IOM-6 T able of Contents General Information3 Cabinet Styles4 Model Number Description6 Receiving and Handling9 Jobsite Storage10 Installation Considerations1 1 Service Access.
UNT -IOM-6 3 UniTrane ® fan-coil and Force Flo cabinet heaters units are single room units with load capabilities of 200 to 1200 cfm. See Figure 1 for unit components. Fan-coil units are available as 2-pipe with or without electric heat (one hydronic circuit) or 4-pipe (two hydronic circuits).
4 UNT -IOM-6 Model F Wall Hung Cabinet** Model B V ertical Cabinet Model A V ertical Concealed Cabinet Styles Model C Horizontal Concealed Model D Horizontal Cabinet Model E Horizontal Recessed.
UNT -IOM-6 5 Model K Low V ertical Concealed* Model L Low V ertical Cabinet* Model M Inverted V ertical Cabinet** Model N Inverted V ertical Recessed** *Fan-coil only **Force Flo cabinet heater only M.
6 UNT -IOM-6 Figure 2. The unit nameplate is on the fan scroll. Model Number Description Each UniTrane ® fan-coil and Force Flo cabinet heater has a multiple character model number unique to that particular unit. T o determine a units specific options, reference the model number on the unit nameplate on the fan scroll.
UNT -IOM-6 7 Model Number Description J With piping, RH K With piping, LH L With piping, RH, ext. end pocket M With piping, RH, ext. end pocket Digits 10 & 11 Design Sequence LO Digit 12 Inlet A F.
8 UNT -IOM-6 R 7 falseback T 8 falseback Digit 40 Main Auto Circuit Setter GPM 0 None A 0 . 5 B 0.75 C 1 . 0 D 1 . 5 E 2 . 0 F 2 . 5 G 3 . 0 H 3 . 5 J 4 . 0 Digit 41 Auxiliary Auto Circuit Setter GPM 0 None A 0 . 5 B 0.75 C 1 . 0 D 1 . 5 E 2 . 0 F 2 .
UNT -IOM-6 9 Receiving and Handling UniTrane ® fan-coil and Force Flo cabinet heaters ship in individual cartons for maximum protection during shipment and for handling and storage ease.
10 UNT -IOM-6 This unit is intended for indoor use only . T o protect the unit from damage due to the elements and prevent it from possibly becoming a contaminant source for IAQ problems, store the unit indoors. If indoor storage is not possible, the Trane Company makes the following provisions for outdoor storage: 1.
UNT -IOM-6 11 Complete the following checklist before installing the unit. o 1. Clearances Allow adequate space for free air circulation, service clearances, piping and electrical connections, and any necessary ductwork. For specific unit dimensions, refer to the submittals.
12 UNT -IOM-6 Service access is available from the front on vertical units and from the bottom on horizontal units. Cabinet and recessed units have removable front or bottom panels to allow access into the unit. See Figure 3 for recommended service and operating clearances.
UNT -IOM-6 13 The following checklist is only an abbreviated guide to the detailed installation procedures given in this manual. Use this list to ensure all necessary procedures are complete. For more detailed information, refer to the appropriate sections in this manual.
14 UNT -IOM-6 o 9. Complete condensate drain line connections on fan-coil units. o 10. Install automatic changeover sensor option on the supply water line. o 11 . Install automatic electric heat lockout switch option on the supply water line. o 12. Install condensate overflow switch option correctly on the auxiliary drain pan.
UNT -IOM-6 15 Size L (in.) 02 21 1/4 03 21 1/4 04 26 1/4 06 35 3/4 08 44 1/4 10 63 1/4 12 63 1/4 Floor Level 15.5 in. 7.5 in. L L 12.19 in. Floor Level V ertical Units Figure 4.
16 UNT -IOM-6 4. Insert the threaded rods or lag screws in the wall before setting the unit in place. 5. Remove the front panel (cabinet unit only) by lifting it upward. 6. Position the hanger holes, located on the back of the unit, over the rod or lag screw heads, pushing the unit downward to properly position.
UNT -IOM-6 17 2. Position and install the suspension rods or a suspension device (supplied by installer) according to the unit size dimensions in Figure 4 on page 15. Also refer to the weight range chart given in T a ble 1. 3 . On cabinet units, remove the bottom panel by using a 5/32 inch Al l e n wrench to unscrew fasteners.
18 UNT -IOM-6 Cabinet units: Install the bottom panel by placing the hinged end on the units hinged end (always at the return end of the unit). See Figure 4 on page 15 for keyslot hanger hole locations. Swing the panel upward into position. Tighten the panel to the unit with the fasteners provided.
UNT -IOM-6 19 Figure 5. T rim ring assembly installation..
20 UNT -IOM-6 o 1. Ensure all panels are in place. o 2 . Tighten unions adequately if unit has a factory deluxe piping package. o 3. Properly vent the hydronic coil to allow water flow through the unit. o 4. Set water flow to the unit properly if unit piping has the circuit setter valve.
UNT -IOM-6 21 Before installing field piping to the coil, consider the following . · All coil connections are 5/8 inch O.D. (or 1/2 inch nominal) female copper connections. · The supply and return piping should not interfere with the auxiliary drain pan or condensate line.
22 UNT -IOM-6 Note: For vertical fan-coil units, push the main condensate drain hose and overflow condensate drain hose through to the inside of the chassis end panel to prevent them from being burned when making sweat connections. Be sure to pull the hoses back through and route to the auxiliary drain pan when the end panel has cooled.
UNT -IOM-6 23 4. V ent the vacuum breaker line to atmosphere or connect it into the return main at the discharge side of the steam trap. 5. Pitch all steam supply and return mains down a minimum of 1 inch per 10 feet in the direction of flow . 6. Do not drain the steam mains or take-off through the coils.
24 UNT -IOM-6 Before installing water piping supply and return lines to factory piping package, note the following items. · All piping connections are 5/8 inch O.D. (1/2 inch nominal) female copper connections. · The fan-coil supply and return piping should not interfere with the auxiliary drain pan or condensate line.
UNT -IOM-6 25 Connecting the Condensate Drain The auxiliary drain pan ships loose with a fan-coil unit with factory piping. T o install the auxiliary drain pan, insert the t abs, located on the side of the drain pan, into the slots located in the chassis end panel.
26 UNT -IOM-6 inch inside diameter flexible plastic tube over the nipple and secure with a field supplied hose clamp. Note: The installer is responsible for adequately insulating field piping. See the External Insulating Requirements section on page 20 for more information.
UNT -IOM-6 27 When using field supplied 3-way valves, position the changeover sensor upstream of the valve on the supply water pipe. Recommendation: When using field supplied 2-way control valves, attach the changeover sensor in a location that will detect an active water temperature.
28 UNT -IOM-6 The hydronic coil contains a vent, either manual or automatic, to release air from the unit. This vent is not sufficient for venting the water piping system in the building. Locate the coil air vent on the piping side, above the coil connections on the unit.
UNT -IOM-6 29 The manual circuit setter valve is an optional end valve supplied on the return pipe of the factory piping package. The valve allows the operator to regulate water flow through the hydronic coil, balance the water flow through the unit with other units in the piping system, and serves as a shutoff or end valve.
30 UNT -IOM-6 securely set the open memory position. The memory stop indicates the last set open position. 7. If using a 3-way valve: close the control valve to the coil, with the differential pressure meter still connected. This will divert flow to the bypass side of a 3-way valve.
UNT -IOM-6 31 The automatic flow valve is an optional end valve on the return of the factory piping package. See Figure 20. The valve regu- lates water flow through the coil to a specific (gpm) flow rate, as ordered by the customer .
32 UNT -IOM-6 The units airflow configuration varies dependent on the model and options ordered. A one-inch duct collar is provided on units with a ducted return and/or discharge to attach ductwork to the unit. The Trane Company recommends using galvanized sheet metal ductwork with fan-coil and cabinet heater units.
UNT -IOM-6 33 Electrical Connections Supply Power Wiring Refer to the unit nameplate to obtain the minimum circuit ampacity (MCA) and maximum fuse size (MFS) or maximum circuit breaker (MCB) to properly size field supply wiring and fuses or circuit break- ers.
34 UNT -IOM-6 Figure 23. The terminal unit control (TUC) board pivots downward to provide service access. ! All field wiring should conform to NEC and all applicable state and local code require- ments. The control panel box is always on the end opposite the piping connections.
UNT -IOM-6 35 T able 3. Maximum Wiring Distances, ft (m) Device Wire Size Range Max. Wiring Distance Fan Mode Switch 14 - 2 2 A WG 500 (152.4) Zone Sensor Module 16 - 22 AWG 200 (60.96) All sensor and input circuits are normally at or near ground (common) potential.
36 UNT -IOM-6 Installing Wall Mounted Controls Wall mounted controls, which include the fan mode switch and the zone sensor module, ship loose inside the unit accessory bag. Position the controller on an inside wall 3 to 5 feet above the floor and and at least 18 inches from the nearest outside wall.
UNT -IOM-6 37 Follow the procedure below to install the zone sensor module. Reference Figure 25 on page 38 when installing the wall mounted zone sensor . 1. Note the position of the setpoint adjustment knob and gently pry the adjustment knob from the cover using the blade of a small screwdriver .
38 UNT -IOM-6 Figure 26. Resistance temperature curve for the zone sensor , entering water temperature sensor , and discharge air sensor . Wall mounted zone sensor Model # Digit 31 = W Split-mounted option: Wall mounted setpoint dial with unit mounted fan mode switch Model # Digit 31 = X Figure 25.
UNT -IOM-6 39 Fan Mode Switch Manual Fan Mode Switch The manual fan mode switch is available for fan-coil units that do not have Trane factory-mounted control packages. This four-position switch (off-hi-med-lo) allows manual fan mode selection and is available unit or wall mounted.
T racer ® ZN.010 and ZN.510 40 UNT -IOM-6 T racer ® ZN.010 and ZN.510 The Tracer ® ZN.010 is a stand-alone device that controls fan-coils and cabinet heaters. The Tracer ® ZN.510 can be stand-alone or utilize peer-to-peer commu- nications. The controller is easily accessible in the control end panel for service.
UNT -IOM-6 41 T racer ® ZN.010 and ZN.510 Operating Information Power -Up Sequence Entering Water T emperature Sampling Function When 24 V AC power is initially applied to the T racer ® ZN.010 or ZN.510, the following sequence occurs: 1. All outputs are controlled off.
T racer ® ZN.010 and ZN.510 42 UNT -IOM-6 BIP3: Occupancy Sensor Binary input #3 (BIP3) on Tracer ® ZN.010 and ZN.510 is available for field- wiring an occupancy sensor , such as a binary switch or a timeclock, to detect occupancy . The sensor can be either normally open or normally closed.
UNT -IOM-6 43 T racer ® ZN.010 and ZN.510 T able 6. Binary Outputs Binary Output D escription Pi n BOP1 Fan high speed J1-1 BOP2 Fan medium speed J1-2 BOP3 Fan low speed J1-4 BOP4 Main valve J1-5 BOP5 Auxiliary valve/electric heat J1-6 BOP6 2-position fresh air damper J1-7 Notes: 1.
T racer ® ZN.010 and ZN.510 44 UNT -IOM-6 The zone sensors available with the Tracer ® ZN.010 and ZN.510 provide up to three different inputs 1. Space temperature measurement (10K thermistor) 2. Local setpoint 3. Fan mode switch Wall mounted zone sensors include a thermistor as a component of the internal printed circuit board.
UNT -IOM-6 45 T racer ® ZN.010 and ZN.510 T able 9. V alid Operating Range and Factory Default Setpoints Setpoint/Parameter D efault Setting V alid Operating Range Unoccupied cooling setpoint 85 ° F.
T racer ® ZN.010 and ZN.510 46 UNT -IOM-6 T roubleshooting Figure 28. The T racer ZN.010 board. T able 10. Red Service LED Activity Red LED Blink Activity LED off continuously when power is applied t.
UNT -IOM-6 47 T racer ® ZN.010 and ZN.510 T able 12. Y ellow COMM LED Activity Y ellow LED Blink Activity Description LED off continuously The controller is not detecting any communication. (Normal for units in standalone applications) LED blinks The controller detects communication.
T racer ® ZN.010 and ZN.510 48 UNT -IOM-6 The outputs are not subject to minimum times during the test se- quence. However, the test sequence only permits one step per second which limits minimum output time. The green LED is turned off when the T est button is pressed.
UNT -IOM-6 49 T racer ® ZN.010 and ZN.510 T able 13. T est Sequence for 1-Heat /1-Cool Configurations St ep s F an Cool Output Heat Output Damper BOP1-3 BOP4 (1) BOP5 BOP6 1. Of f O ff O ff O ff Closed 2. Fan High High O ff O ff C losed 3. Fan Medium Medium Off Of f C losed 4.
T racer ® ZN.010 and ZN.510 50 UNT -IOM-6 Notes: Priority Level: Diagnostics are listed in order from highest to lowest priority . The controller senses and records each diagnostic independently of other diagnostics. It is possible to have multiple diagnostics present simultaneously .
UNT -IOM-6 51 T racer ® ZN.010 and ZN.510 Cycling Power to the Controller There are four ways in which diagnostics are reset: 1. Automatic reset by the controller 2. By initiating a manual output test at the controller 3. By cycling power to the controller 4.
T racer ® ZN.010 and ZN.510 52 UNT -IOM-6 T rane’ s Service T ool, Rover™ Alarm Reset Rover, Tranes service tool, can reset diagnostics present in the controller . For complete information about Rover, refer to Trane publication EMTX-IOP-2 Rover Installation, Operation and Program- ming Guide .
UNT -IOM-6 53 T racer ® ZN.010 and ZN.510 T able 15. Fan Outputs do not Energize Probable Cause Explanation Random start After power-up, the controller always observes a random start that varies observed between 0 and 25 seconds. The controller remains off until the random start time expires.
T racer ® ZN.010 and ZN.510 54 UNT -IOM-6 T able 16. V alves St ay Closed Probable Cause Explanation Normal operation The controller opens and closes the valves to meet the unit capacity require- ments. Requested mode: off It is possible to communicate the operating mode (such as off, heat, and cool) to the controller .
UNT -IOM-6 55 T racer ® ZN.010 and ZN.510 T able 17. V alves St ay Open Probable Cause Explanation Normal operation The controller opens and closes the valves to meet the unit capacity require- ments. V alve override The controller can communicate a valve override request to affect the valve operation.
T racer ® ZN.010 and ZN.510 56 UNT -IOM-6 T able 18. Electric Heat Not Operating Probable Cause Explanation Normal operation The controller cycles electric heat on and off to meet the unit capacity require- ments. Requested mode: off It is possible to communicate the operating mode (such as off, heat, cool) to the controller .
UNT -IOM-6 57 T racer ® ZN.010 and ZN.510 T able 19. Fresh Air Damper St ays Closed Probable Cause Explanation Normal operation The controller opens and closes the fresh air damper based on the controllers occupancy mode and fan status.
T racer ® ZN.010 and ZN.510 58 UNT -IOM-6 T able 20. Fresh Air Damper Stays Open Probable Cause Explanation Normal Operation The controller opens and closes the fresh air damper based on the controllers occupancy mode and fan status.
UNT -IOM-6 59 T racer ® ZN.520 Tracer ® ZN.520 is a communicating or standalone device. It is easily accessible in the control end panel for service. The control end panel is on the end opposite the piping. Sequence of Operations OFF: Fan is off; control valve options and fresh air damper options close.
T racer ® ZN.520 60 UNT -IOM-6 Follow these general guidelines when installing communication wiring: 1 ) Maintain a maximum 5000 ft. aggregate run 2 ) Install all communication wiring in accordance with the NEC and all local codes. 3 ) Solder the conductors and insulate (tape) the joint sufficiently when splicing communication wire.
UNT -IOM-6 61 T racer ® ZN.520 T racer ® ZN.520 Unit Start-Up Refer to the Trane publication, CNT-IOP-2 Installation Operation and Programming Guide , to operate the Tracer ® ZN.520 with Trane Integrated Comfort System (ICS). The factory pre-programs the Tracer ® ZN.
T racer ® ZN.520 62 UNT -IOM-6 When the controller is in the occupied mode, the unit attempts to maintain the space temperature at the active occupied heating or cooling setpoint, based on the measured space temperature, the discharge air temperature, the active setpoint, and the proportional/ integral control algorithm.
UNT -IOM-6 63 T racer ® ZN.520 standby cooling and heating setpoints. Because the occupied standby setpoints typically cover a wider range than the occupied setpoints, the Tracer ® ZN.520 controller reduces the demand for heating and cooling the space.
T racer ® ZN.520 64 UNT -IOM-6 refer to the product-specific literature from that manufacturer . If the unit is communicating with Tracer Summit and the supply fan control programming point is configured for Tracer (the factory config- ures as local), then Tracer Summit will control the fan regardless of the fan mode switch position.
UNT -IOM-6 65 T racer ® ZN.520 The Tracer ® ZN.520 controller operates the supply fan continuously when the controller is in the occupied and occupied standby modes, for either heating or cooling. The controller only cycles the fan off with heating and cooling capacity in the unoccupied mode.
T racer ® ZN.520 66 UNT -IOM-6 Unit diagnostics can affect the Tracer ® ZN.520 controller operation, causing unit operation to be defined as abnormal. Refer to the Troubleshooting section for more information about abnormal unit operation. The heating output is controlled based on the heating capacity .
UNT -IOM-6 67 T racer ® ZN.520 switch depending on the error . Fan speed increases as the space temperature rises above the active cooling setpoint. T able 21.
T racer ® ZN.520 68 UNT -IOM-6 Hea tin g Cooling Fan mode Occ. Unocc. Occ. Unocc. O f f Of f Off Off O ff L o w Low Off/High Low O ff/High Medium Me d Off/High M ed O ff/High High Hi gh O ff/High Hig h O ff/High Auto (continuous) Default Off/High Default Off/High fan sp.
UNT -IOM-6 69 T racer ® ZN.520 On a transition from off to any other fan speed, the Tracer ® ZN.520 controller automatically starts the fan on high speed and runs the fan at high speed for 0.5 seconds. This provides the ample torque required to start all fan motors from the off position.
T racer ® ZN.520 70 UNT -IOM-6 warm enough to heat when it is five degrees above the measured space temperature. When the controller invokes the entering water temperature sampling function, the unit opens the main hydronic valve for no more than three minutes before considering the measured entering water temperature.
UNT -IOM-6 71 T racer ® ZN.520 to expose the damper stop screw on the control panel end. Relocate the stop screw to the appropriate position. Then loosen the stop screw wingnut and adjust the linkage. Economizer Damper With a valid outdoor air temperature (either hardwired or communi- cated), Tracer ® ZN.
T racer ® ZN.520 72 UNT -IOM-6 Dehumidification is possible when mechanical cooling is available, the heating capacity is located in the reheat position, and the space relative humidity setpoint is valid.The controller starts dehumidifying the space when the space humidity exceeds the humidity setpoint.
UNT -IOM-6 73 T racer ® ZN.520 input as not used. BIP Description F an V alve Electric heat D am pe r BI 1 Low temperature detection O f f Open O ff C losed BI 2 Condensate overflow O ff Closed O f f Closed BI 4 Fan status Of f Cl osed Off Cl osed T able 26.
T racer ® ZN.520 74 UNT -IOM-6 Binary outputs are configured to support the following: Three fan stages (when one or two fan stages are present, medium fan speed can be configured as exhaust fan).
UNT -IOM-6 75 T racer ® ZN.520 T able 28. Analog Inputs Description T erminals Function Range Zone TB 3- 1 Space temperature input 5° to 122°F (-15° to 50°C) Ground TB3-2 Analog ground NA Set T B 3 - 3 Setpoint input 40° to 1 15°F (4.4° to 46.
T racer ® ZN.520 76 UNT -IOM-6 The Tracer ® ZN.520 controller accepts the following zone sensor module inputs: S pace temperature measurement (10kW thermistor) Local setpoint (either interna.
UNT -IOM-6 77 T racer ® ZN.520 These setpoint limits only apply to the occupied and occupied standby heating and cooling setpoints. These setpoint limits do not apply to the unoccupied heating and cooling setpoints stored in the controllers configuration.
T racer ® ZN.520 78 UNT -IOM-6 T able 29. Zone sensor wiring connections T B1 Description 1 Space temperature 2 Common 3 Setpoint 4 Fan mode 5 Communications 6 Communications The Tracer ® ZN.
UNT -IOM-6 79 T racer ® ZN.520 T able 30. T racer ® ZN.520 Diagnostics Diagnostic F a n Other Outputs (Note 1) Condensate overflow O f f V alves Closed, Fresh air damper Closed, electric heat Off, B.
T racer ® ZN.520 80 UNT -IOM-6 Note 3: When the outdoor air temperature sensor has failed or is not present, the T racer ® ZN.520 controller generates a diagnostic to indicate the sensor loss condition. The controller automatically clears the diagnostic once a valid outdoor air temperature value is present (non-latching diagnostic).
UNT -IOM-6 81 T racer ® ZN.520 If a Low T emperature Detection diagnostic recurs within 24 hours after an automatic diagnostic reset, you must manually reset the diagnos- tic.
T racer ® ZN.520 82 UNT -IOM-6 LED Operation Red Service LED T able 31. Red Service LED Activity LED Activity Description Off continuously after Normal operation power is applied to the controller . On continuously , even when Someone is pressing the Service power is first applied to the button or the controller has failed.
UNT -IOM-6 83 T racer ® ZN.520 T able 32. Green St atus LED activity Green LED activity D escription On continuously Power on (normal operation) Blinks (one blink) The controller is in manual output test mode. No diagnostics present. Blinks (2 blinks) The controller is in manual output test mode.
T racer ® ZN.520 84 UNT -IOM-6 LED Operation The green status LED is off when you press the T est button.T o begin the manual output test mode, press and hold the T est button (which causes the green LED to go off) for at least two seconds, then release the button.
UNT -IOM-6 85 T racer ® ZN.520 T able 35. Fan outputs do not energize Probable Cause Explanation Random start observed After power up, the controller always observes a random start from zero to 25 seconds.The controller remains off until the random start time expires.
T racer ® ZN.520 86 UNT -IOM-6 T able 36. V alves St ay Closed Probable Cause Explanation Requested mode off Y ou can communicate a desired operating mode (such as off, heat, and cool) to the controller . When off is communicated to the controller , the unit controls the fan off.
UNT -IOM-6 87 T erminal Unit Control (TUC) The TUC is capable of operating in either a standalone application or interfacing with a Trane Tracer ® system. In addition, Trane EveryWare ä software is available to edit the configuration of the TUC. The TUC board is easily access- ible on an isolation panel in the control panel.
T erminal Unit Control (TUC) 88 UNT -IOM-6 For TUC controlled units that will interface with the Trane Tracer ® system or Tracer Summit ® building management system, terminate the communication wiring in the control box at the designated terminals on the low voltage terminal strip.
UNT -IOM-6 89 T erminal Unit Control (TUC) Establish service communication to the TUC by connecting a twisted wire pair to one of the following connection points. · Remote zone sensor module · Low voltage terminal strip inside the control panel This will allow the technician to view and edit the TUC configuration and troubleshoot the unit.
T erminal Unit Control (TUC) 90 UNT -IOM-6 3. Rotate the setpoint dial on the zone sensor module to 55 ° F fo r cooling or 85 ° F for heating. The appropriate control valve will actuate assuming the.
UNT -IOM-6 91 T erminal Unit Control (TUC) T able 37. V alid TUC Addresses DI P S wi tc h P os it io n D IP Sw it ch Position Address 1 2 3 4 5 6 7 8 Ad dress 1 2 3 4 5 6 7 8 3 3 X X 6 5 X X 3 4 X X 6.
T erminal Unit Control (TUC) 92 UNT -IOM-6 · Occupied · Unoccupied · Tracer ® with supply fan control Occupied In the occupied mode, the factory configures the TUC for continuous occupied fan cycle. With the fan control set to auto, the fan operates at the required speed to meet the cooling or heating capacity .
UNT -IOM-6 93 T erminal Unit Control (TUC) high or low temperatures. In addition, the TUC calculates the heating setpoint equal to the cooling setpoint minus an adjustable heating offset. Furthermore, the heating setpoint cannot exceed a value less than or equal to the cooling setpoint.
T erminal Unit Control (TUC) 94 UNT -IOM-6 The entering water temperature sampling function allows water to circulate in an attempt to sense water cold enough to provide cooling. The function uses a timer to permit the controller and the valve to fully open while the water circulates for 3 minutes.
UNT -IOM-6 95 T erminal Unit Control (TUC) Note: The auxiliary electric heat option is not available with a four-pipe fan-coil unit. Units with manual fresh air dampers ship with the damper in the closed position, which is adjustable from zero to 100 percent in 25 percent incre- ments.
T erminal Unit Control (TUC) 96 UNT -IOM-6 the outside air temperature falls to 10 ° F or more below the zone temperature. The TUC will control the damper to a position to produce optimal cooling during economizing. If power is interrupted or the TUC is turned off, the damper will spring back to the closed position.
UNT -IOM-6 97 T erminal Unit Control (TUC) The low temperature detection option protects the unit from freezing conditions by using a capillary line in the coil fins to detect freezing conditions. The TUC uses the low temperature sensor with a normally open valve.
T erminal Unit Control (TUC) 98 UNT -IOM-6 BIP4: Smoke Input BIP3: Occupied/ Unoccupied Mode BIP1: External Interlock and the electric heat to disable. This creates an immediate shutdown latching diagnostic, which requires a manual or Tracer â reset to resume normal operation.
UNT -IOM-6 99 T erminal Unit Control (TUC) Autocycle T est The autocycle test is an operating mode that activates the TUC outputs in a defined series of steps.
T erminal Unit Control (TUC) 100 UNT -IOM-6 T able 39. Autocycle T est St aging Stage LEDs (1) F a n - C oil Output Exercised 1 2 3 4 0 Off 1 l Fan low speed 2 l Fan medium speed 3 ll Fan high speed 4.
UNT -IOM-6 101 T erminal Unit Control (TUC) Use the TUC human interface to read the current unit diagnostic. If no diagnostics are present, the last diagnostic appears. Perform the following steps. Refer to T able 23 on page 72 for staging details. 1.
T erminal Unit Control (TUC) 102 UNT -IOM-6 Use the human interface to read the unit operating machine state. 1. Read and record the initial TUC address. 2. Set the TUC DIP switch #5 and #8 to ON (address = 9). The remaining switches will be off. 3. Short and hold the test input.
UNT -IOM-6 103 T erminal Unit Control (TUC) T able 41. Operating Machine St ate LED Sequences and Codes S eq ue n ce 1 S e qu en c e 2 Se q ue nc e 3 1 2 3 4 1 2 3 4 1 2 3 4 Code M achine State ¡¡¡.
T erminal Unit Control (TUC) 104 UNT -IOM-6 Using the human interface, read the operating control mode. 1. Read and record the initial TUC address. 2. Set the TUC DIP switch #5 and #7 to ON (address = 10). The remaining switches will be off. 3. Short and hold the test input.
UNT -IOM-6 105 T erminal Unit Control (TUC) Sequence 1 Sequence 2 Sequence 3 Sequence 1 Sequence 2 Sequence 3 1 2 3 4 1 2 3 4 1 2 3 4 ¡¡¡¡ ¡¡¡¡ ¡¡l ¡ ¡ ¡¡l ¡¡¡ l ¡ 5 6 7 5 6 7 5 6 7 T able 42.
T erminal Unit Control (TUC) 106 UNT -IOM-6 T able 42Continued. Operating Control Mode LED Sequences and Codes Sequence 1 Sequence 2 Sequence 3 1 2 3 4 1 2 3 4 1 2 3 4 Code Control Definition Mode .
UNT -IOM-6 107 T erminal Unit Control (TUC) T able 43. TUC Controller Diagnostics Diagnostic Latching? F an V alves Elect. Heat Damper Di rt y f il te r Y es No Ac tio n No Action No A ction No Action.
T erminal Unit Control (TUC) 108 UNT -IOM-6 Remove the 24 V AC power from the board and then reapply it to cycle the unit through a power-up sequence. By default, the controller attempts to reset all diagnostics at power-up. The TUC editors reset failure point allows the user to reset controller diagnostics.
UNT -IOM-6 109 T erminal Unit Control (TUC) More detailed information about programming and operating the TUC board can be found in Trane publication, EMTX-IOP-1 TUC Installa- tion Operation and Programming Guide.
T erminal Unit Control (TUC) 110 UNT -IOM-6 T able 45Continued. Fan Outputs not Energizing Probable Cause Explanation No power to the TUC The TUC requires 24 V AC power for the unit to operate properly .
UNT -IOM-6 111 T erminal Unit Control (TUC) T able 47. V alves Open Probable Cause Explanation Normal Operation The valves open and close to meet unit capacity requirements. Override Present The valves may be overridden to the open position by either the Tracer ® system or by Everyware software.
T erminal Unit Control (TUC) 112 UNT -IOM-6 T able 48. Electric Heat Not Operating Probable Cause Explanation Normal Operation The controller cycles electric heat on and off to meet the unit capacity requirements. Unit Disabled The TUC may be disabled via the shutdown mode on a Tracer ® system or if BIP1 is configured as external interlock.
UNT -IOM-6 113 T erminal Unit Control (TUC) T able 49. Fresh Air Damper Closed Probable Cause Explanation Normal Operation · The two-position fresh air damper opens under normal unit operation during occupied mode and closes during unoccupied mode.
T erminal Unit Control (TUC) 114 UNT -IOM-6 T able 50. Fresh Air Damper Open Probable Cause Explanation Normal Operation · The two-position fresh air damper opens under normal unit opera tion during occupied mode and closes during unoccupied mode.
UNT -IOM-6 115 T able 52. Zone T emperature T oo Cool Probable Cause Explanation Active Heating/Cooling Setpoints V erify that the active heating/cooling setpoints are reasonable. It is possible for either the zone sensor or for the Tracer ® system to send heating and cooling setpoints to the TUC.
116 UNT -IOM-6 Listed below are the recommended maintenance schedules. Instruc- tions for specific maintenance procedures are given in the sections following the checklist. WARNING: Allow rotating fan to stop before servicing equipment. Failure to do so may cause severe personal injury or death.
UNT -IOM-6 117 02 1 x 8.875 x 19.125 1 x 5.5 x 19.13 (2.54 x 23 x 49) (2.54 x 13.97 x 48.59) 03 1 x 8.875 x 19.125 1 x 5.5 x 19.13 (2.54 x 23 x 49) (2.54 x 13.97 x 48.59) Low Vertical 1 x 8.875 x 24.125 (2.54 x 23 x 61) 04 1 x 8.875 x 24.125 1 x 5.5 x 24.
118 UNT -IOM-6 Clean the fan-coil units main and auxiliary drain pans to ensure the unit drains condensate properly . Check the condensate drain pan and drain line to assure the conden- sate drains properly at least every six months or as dictated by operating experience.
UNT -IOM-6 119 1 . T o remove the auxiliary drain pan, loosen the hose clamp (inst aller supplied) around the drain con- nection collar and disconnect the drain line. 2. Remove the overflow drain line to the auxiliary drain pan if it was installed. 3.
120 UNT -IOM-6 V ertical units : T o remove the main drain pan on vertical fan-coil units, disconnect the clips holding the pan to the fanboard. Disconnect the main and overflow drain hoses and slide pan forward to remove.
UNT -IOM-6 121 Coils become externally fouled as a result of normal operation. Dirt on the coil surface reduces its heat transfer ability that can result in comfort problems, increased airflow resistance, and thus increased operating energy costs.
122 UNT -IOM-6 0 2 1 .05 2 .10 3 .14 4 .20 0 3 1 .06 2 .12 3 .18 4 .24 0 4 1 .08 2 .15 3 .23 4 .30 06 1 . 1 1 2 .22 3 .33 4 .44 0 8 1 .14 2 .28 3 .42 4 .56 1 0 1 .18 2 .35 3 .53 4 .71 1 2 1 .21 2 .42 3 .62 4 .83 Note: 1-row coil refers only to the 1-row heating coil in some 4-pipe configurations.
UNT -IOM-6 123 The process of cooling and dehumidification produces condensate (water) which must be continuously removed from the air handling unit. The entering air side of the cooling coil to the leaving edge of the drain pan is considered to be the wet section of the unit.
124 UNT -IOM-6 4. Rinse the affected surfaces thoroughly with fresh water and a fresh sponge to prevent potential corrosion of the drain pan and drain line. 5. Ensure the drain line remains open following the cleaning process. 6. Replace all panels and parts and restore electrical power to the unit.
UNT -IOM-6 125 7. Allow the unit to dry completely before putting it back into service. 8. Do not allow any contaminated material to contact other areas of the unit or building.
126 UNT -IOM-6 Fan Board Assembly Removal Follow the procedure below when replacing the coil or making repairs to the fan or motor . WARNING: Allow rotating fan to stop before servicing equipment. Failure to do so may cause severe personal injury or death.
UNT -IOM-6 127 After removing the fanboard assembly from the unit, disconnect the fan wheel/wheels from the motor shaft by loosening the Allen head setscrew on the fan wheel hub collar . Next, remove the mounting bolts holding the fan motor plate to the mounting bracket of the fanboard.
128 UNT -IOM-6 Appendix Factory Piping Packages Automatic Circuit Setter (C).
UNT -IOM-6 129 For reference only: This schematic show typical wiring of a fan-coil. It is not intended for a basis of design or for equipment installation purposes in the field. For an as-built schematic specific to a particular unit, please see the ship-with schematic for that specific unit.
130 UNT -IOM-6 NOTES: 1. UNLESS OTHERWISE NOTED, ALL SWITCHES ARE SHOWN A T 25 C (77 F), AT ATMOSPHERIC PRESSURE, A T 50% RELA TIVE HUMIDITY , WITH ALL UTILITIES TURNED OFF , AND AFTER A NORMAL SHUTDOWN HAS OCCURRED. 2. DASHED LINES INDICA TE RECOMMENDED FIELD WIRING BY OTHERS.
UNT -IOM-6 131 T racer ® ZN.010 T ypical Wiring Diagram For Reference Only: This schematic shows typical wiring of a fan-coil. It is not intended for a basis of design or for equipment installation purposes in the field.
132 UNT -IOM-6 For Reference Only: This schematic shows typical wiring of a fan-coil. It is not intended for a basis of design or for equipment installation purposes in the field. For an as-built schematic specific to a particular unit, please see the ship-with schematic for that specific unit or contact your local T rane representative.
UNT -IOM-6 133 TUC T ypical Wiring Diagram For Reference Only: This schematic shows typical wiring of a fan-coil. It is not intended for a basis of design or for equipment installation purposes in the field.
134 UNT -IOM-6 TUC T ypical Wiring Diagram For Reference Only: This schematic shows typical wiring of a fan-coil. It is not intended for a basis of design or for equipment installation purposes in the field.
UNT -IOM-6 135.
The T rane Company Worldwide Applied Systems Group 3600 Pammel Creek Rd. LaCrosse, WI 54601-7599 www.trane.com An American Standard Company Literature Order Number UNT - IOM-6 File Number PL-TD- UNT -.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Trane LO è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Trane LO - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Trane LO imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Trane LO ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Trane LO, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Trane LO.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Trane LO. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Trane LO insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
