Installation Operation Maintenance Voyager™ II Rooftop units Cooling only TKD/TKH 155 175 200 250 Reversible WKD/WKH 125 155 200 Gas-Fired YKD/YKH 155 175 200 250 R22 - R407C Refrigerant RT-SVX19A-E4
General information Foreword Warnings and cautions Reception These instructions are given as a guide to good practice in the installation, start-up, operation, and maintenance by the user, of Trane TKD/TKH, WKD/WKH and YKD/YKH units. They do not contain full service procedures necessary for the continued successful operation of this equipment. The services of a qualified technician should be employed through the medium of a maintenance contract with a reputable service company.
General information Warranty Refrigerant Storage Warranty is based on the general terms and conditions of the manufacturer. The warranty is void if the equipment is repaired or modified without the written approval of the manufacturer, if the operating limits are exceeded or if the control system or the electrical wiring is modified. Damage due to misuse, lack of maintenance or failure to comply with the manufacturer's instructions or recommendations is not covered by the warranty obligation.
Contents 4 Foreword 2 Warnings and Cautions 2 Safety recommendations 2 Reception 2 Warranty 3 Refrigerant 3 Maintenance contract 3 Storage 3 Training 3 Installation 6 Reception of units 6 Roof curb installation 7 Dimensions/Weights/Clearances 8 Installing the unit 10 Connection of duct network 11 Condensate drain piping 12 Gas pipework installation 13 Filter installation 14 Supply fan adjustment 15 Component air pressure drops 17 Supply fan performances 20 Electri
Contents Unit Options Hot water coil 40 Electric Heater 41 Soft Starter 41 0 - 25% fresh air hood 42 Barometric relief 43 Operation 44 Operation with a conventional thermostat 44 Setting the economizer 47 Test procedures 49 Test modes 50 Unit start-up 51 Cooling without an Economizer 54 Low Ambient Operation 55 Cooling with an Economizer 55 Economizer Set-Up 56 ReliaTel™ Control Heating Operation 56 Ignition Module 56 Final installation checklist 57 Maintenance RT-SVX19A
Installation General information : The installation must conform to all local standards and regulations. Reception of units Rooftop unit The unit is supplied on a wooden frame. It is recommended to check the machine's condition upon reception. There are two ways to handle the unit: 1. Use the openings in the wooden frame to handle the machine using a fork lift, in accordance with applicable safety regulations. 2. Use a lifting beam correctly adjusted to fit the unit (Figure 1a).
Installation Table 1 - Sling lengths and maximum unit weight Unit size A (mm) B (mm) Maximm weight kg 125 3000 1900 644 155 3000 1900 773 175 3000 1900 810 400 3500 2200 1001 500 3500 2200 1027 Figure 1b - Maximum slope correction of adjustable roof curb. Roof curb Installation (TKD-WKD-YKD accessories) Roof curbs are available as an accessory for "downflow" units to support the unit and ensure the water tightness between the rooftop and the roof.
Installation Dimensions/Weights/Clearances Figure 3 - Minimum clearances Table 2 - Minimum clearances (mm) Minimum clearance UNIT 1 2 3 4 5 YKD/YKH 155 1900 1800 1220 1000 1300 YKD/YKH 175 1900 1800 1220 1000 1300 YKD/YKH 200 1900 1800 1220 1000 1300 YKD/YKH 250 1900 1800 1220 1000 1300 TKD/TKH 155 1900 1800 1220 1000 1300 TKD/TKH 175 1900 1800 1220 1000 1300 TKD/TKH 200 1900 1800 1220 1000 1300 TKD/TKH 250 1900 1800 1220 1000 1300 WKD/WKH 125 1900 18
Installation Table 3a - Weigths & center of gravity (Figure 1) Maximum weight Corner Weight (1) Center of Gravity Shipping Net A B C D Length (L) Width (W) UNIT (kg) (kg) (kg) (kg) (kg) (kg) (mm) (mm) YKD/YKH 155 866 698 243 176 118 162 1143 737 YKD/YKH 175 902 735 251 188 127 169 1168 737 YKD/YKH 200 1128 920 324 242 151 203 1321 838 YKD/YKH 250 1154 946 327 251 159 208 1346 838 TKD/TKH 155 790 623 219 159 103 142 1143 711 TKD/TKH 175 827 6
Installation Installing the unit 1) Unit mounting on roof Figure 4 Fix the rooftop curb on the joint beam of the building's structure. Make the rooftop curb's sealing surface level using angle brackets adjusted by screw bolts, located around its perimeter. Place the adhesive seals on the curb's sealing surface (perimeter and cross pieces). Make the rooftop leak-tight around the curbs before installing the unit, in compliance with current construction standards.
Installation Connection of duct network 1) Downflow discharge units (TKD,WKD,YKD) Using the rooftop curb • The rooftop curb must be insulated on the outside walls at the discharge and intake openings to prevent condensation in the ducts. • The rims around the discharge and intake openings make it possible to attach the flanges on the ends of the ducts. If you are using rigid duct ends recommended on the rooftop curb plan, it is essential to fix these components before installing the unit.
Installation Condensate drain piping A 42mm PVC condensate drain connection with P-trap is provided. Follow local codes and standard piping practices when running the drain line. Install a trap and be sure to fill with water before starting the unit. Pitch the line downward, away from the unit to avoid long, level, horizontal runs. Refer to Figure 7.
Installation Gas pipework installation The installation must conform to all standards and regulations. CAUTION! Should the pressure at the unit valve gas inlet be higher than 0.035 bar, an expansion valve must be installed. The gas supply pipework and gas stop valve to be installed near the unit must be sized so as to assure the gas pressure is sufficient at the unit inlet when operating at full load.
Installation Filter installation To gain access to filters, remove the supply fan access panel on downflow units and the filter access panel on the end for horizontal units. CAUTION! Do not operate unit without filters in place. The maximum pressure drops allowable on filters are: EU2/G2: 120 Pa EU4/G4: 150 Pa Each unit ships with 40 or 50 mm thick filters. Number and size of filters is determined by size and configuration of the unit.
Installation Supply fan adjustment Use the following procedure to determine the proper adjustment of the supply fan for a specific application. 1. Determine total external static pressure about system and accessories. a. Obtain the design airflow rate and the design external static pressure drop through the distribution system. b. Add static pressure drop of the accessories installed on the unit. (Table 7,8 & 9) c.
Installation Figure 9 - Typical fan, motor, and sheave assembly To increase airflow Loosen variable sheave set screw and turn sheave clockwise. To decrease airflow Loosen variable sheave set screw and turn sheave counter-clockwise. To increase belt tension Loosen the nut (next to the idler sheave) that secures the sheave in place. With a wrench, apply pressure clockwise on the outside nut (round headed one), until tension desired is reached.
Installation Component air pressure drops Table 7 - YKD/YKH Pressure drop through accessories Filter Filter YKD/YKH 155 YKD/YKH 175 YKD 200 YKH 200 YKD 250 YKH 250 RT-SVX19A-E4 Economizer Economizer Airflow EU2/G2 EU4/G4 100% outside air 100% return air 6800 7650 8500 9350 10200 7870 8860 9850 10840 11830 8970 10090 11210 12330 13450 8970 10090 11210 12330 13450 11280 12690 14100 15510 16920 11280 12690 14100 15510 16920 13 16 19 22 26 17 21 25 30 35 12 15 19 23 27 11 14 17 20 23 18 24 29 36
Installation Table 8 - TKD/TKH Pressure drop through accessories Filter TKD/TKH 155 TKD/TKH 175 TKD 200 TKH 200 TKD 250 TKH 250 18 Filter Economizer Economizer Electric Hot water coil 100% outside air 100% return air heater Downflow only Airflow EU2/G2 EU4/G4 6800 13 27 8 6 7 33 7650 16 30 10 7 9 40 8500 19 34 12 8 11 48 9350 22 37 14 9 13 56 10200 26 40 16 10 16 65 7870 17 30 10 7 10 42 8860 21 34 12 8 13 51 9850 25 38 15 9 16 61 1
Installation Table 9 - WKD/WKH Pressure drop through accessories Filter EU2/G2 9 Filter EU4/G4 21 Economizer 100% outside air 6 Economizer 100% return air 5 Electric heater 4 Hot water coil Downflow only 37 6430 11 24 7 6 6 45 7140 14 27 9 6 7 53 7850 17 30 10 7 9 62 8560 20 33 12 8 12 72 6800 13 27 8 6 7 33 Airflow 5720 WKD/WKH 125 WKD/WKH 155 WKD 200 WKH 200 RT-SVX19A-E4 7650 16 30 10 7 9 40 8500 19 34 12 8 11 48 9350 22 37 14 9 13 56 1020
Installation Supply fan performances Table 10 - YK 155 External static pressure External Static Pressure (Pa) 25 m3/h 50 75 100 125 6800 7650 8500 150 175 200 225 250 RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) 564 1 587 1.07 610 1.15 633 1.23 655 1.31 677 560 1.14 583 1.23 605 1.31 627 1.39 648 1.48 669 1.56 690 1.65 710 1.39 1.74 1.6 649 1.69 669 1.78 689 1.87 708 1.97 727 2.06 746 2.16 559 1.31 584 1.
Installation Table 11 - YK 175 External static pressure External Static Pressure (Pa) 25 m3/h 50 75 100 125 150 175 200 225 250 RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) 7870 726 8860 751 1.96 1.58 748 1.66 770 1.74 772 2.05 792 2.13 811 2.22 831 2.31 850 9850 779 2.41 801 2.52 822 2.62 841 2.72 859 2.82 877 2.91 895 3.01 10840 852 3.19 11830 926 4.12 946 4.25 874 3.31 893 3.42 911 791 912 1.83 813 1.92 835 2.02 2.
Installation Table 13 - YK 250 External static pressure External Static Pressure (Pa) 25 m3/h 50 75 100 125 150 175 200 225 250 RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) 9870 606 11280 603 12690 1.88 620 1.97 639 2.77 660 2.92 679 3.06 696 3.19 712 3.32 727 3.44 15510 699 3.65 719 3.82 736 3.98 753 4.13 16920 758 4.70 777 4.89 794 5.06 810 5.23 824 5.39 838 5.54 625 1.72 643 1.82 637 2.07 653 2.17 670 2.27 686 2.37 602 2.18 622 2.
Installation Table 15 - TK 175 External static pressure External Static Pressure (Pa) 25 m3/h 50 75 100 125 150 175 200 225 250 RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) 7870 593 0.95 623 1.03 651 1.11 679 1.19 706 1.28 733 1.37 761 1.47 788 1.57 815 1.68 1.58 756 1.67 780 1.77 805 1.87 829 1.97 853 2.08 8860 623 1.21 653 1.31 680 1.4 706 1.49 731 9850 687 1.64 714 1.75 739 1.85 763 1.95 786 2.05 809 2.
Installation Table 17 - TK 250 External static pressure External Static Pressure (Pa) 25 m3/h 50 75 100 125 150 175 200 225 250 RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) 9870 11280 606 12690 599 1.8 628 1.97 1.63 585 1.31 609 1.42 632 1.51 633 1.77 657 1.9 679 2.02 700 2.13 720 2.24 739 2.35 655 2.15 681 2.31 704 2.47 726 2.62 14100 631 2.2 654 2.38 679 2.57 705 2.76 729 2.96 752 3.14 15510 690 2.9 711 16920 749 3.
Installation Table 19 - WK 155 External static pressure External Static Pressure (Pa) 25 m3/h 50 75 100 125 150 175 200 225 250 RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) RPM (kW) 6800 566 7650 571 0.82 604 8500 0.7 599 0.77 632 0.85 664 0.93 696 1.02 727 1.11 757 1.2 0.9 634 0.99 664 1.07 694 1.16 723 1.25 751 1.34 779 1.44 578 0.95 612 1.05 644 1.15 673 1.25 700 1.34 727 1.43 754 1.53 780 1.63 806 1.73 1.65 764 1.
Installation Electrical connection Over current protection The electric panel is located in the unit compressor section. Remove the compressor access panel. The unit is designed to run with 400 V +/- 5%/50 Hz/ 3 ph. The branch circuit feeding the unit must be protected in accordance with national or local codes and max unit amps indicated in Table 21 to 28. Factory supplied Disconnect switch (Option) Power wiring The disconnect switch is factory mounted.
Installation Scroll compressors Compressor electrical phasing Proper phasing of the electrical power wiring is critical for proper operation and reliability of the scroll compressor and fans. Proper rotation of the scroll compressor must be established before the unit is started. This is accomplished by confirming that the electrical phase sequence of the power supply is correct. The motor is internally connected for clockwise rotation with the inlet power supply phased A, B, C.
Installation Table 22 - Electrical data - TKD/TKH Compressor motor and condenser motor YKD/H YKD/H YKD/H YKD/H 155 175 200 250 2 2 2 2 Compressor Number Type Model Scroll Scroll Scroll Scroll 9T / 5T 10T / 6.7T 9T / 9T 10T / 10T Nominal Amps (1) (A) 15.0 / 8.5 15.1 / 11.4 14.7 / 14.7 15.3 / 15.3 Locked rotor Amps (2) (A) 118 / 65.
Installation Table 24 - Electrical data - WKD/WKH Compressor motor and condenser motor WKD/H WKD/H WKD/H 125 155 200 2 2 2 Compressor Number Type Model Scroll Scroll Scroll 6T / 6T 7.5T /7.5T 10T / 10T Rated Amps (1) (A) 10.0 / 10.0 12.1 / 12.1 17.5 / 17.5 Locked rotor Amps (2) (A) 74 / 74 79 / 79 98 / 98 Nominal Airflow (m3/h) 15300 15850 23600 Axial Axial Axial 660 660 710 Direct Direct Direct Outdoor Fan Type Diameter (mm) Drive type Number 2 2 2 0.25 0.
Installation Table 26 - Electrical data - YKD/YKH Supply fan motor TKD/H TKD/H TKD/H TKD/H 155 175 200 250 8500 9850 11210 14100 Indoor Fan Nominal Airflow (m3/h) Static pressure available (4) (Pa) 175 250 200 125 Maximum static pressure available (5) (Pa) 325 400 375 350 FC Centrifugal FC Centrifugal FC Centrifugal FC Centrifugal 15" / 15" 15" / 15" 18" / 18" 18" / 18" Belt Belt Belt Belt 1 1 1 1 2.2 / 3.0 3.0 / 4.6 3.0 / 4.6 4.
Controls Control wiring The control circuit is 24 V AC. Unit includes a 400/24 V transformer. WARNING! The unit disconnect switch must be opened and locked open. Risk of injury and electrocution. CAUTION! The unit 24 V transformer must not be used to power accessories mounted on site, other than those proposed by Trane.
Controls Unit controlled by BAS Each unit must be equipped with a TCI-R board. A communication bus (twisted shielded pair) must link each TCI-R to the Trane Roof Top Manager (RTM) or to the communication gateway (in the case of an external BAS). Connect one temperature sensor to each unit. LonTalk® communication interface LTCl-R board allows ICS communication between a ReliaTel™ unit and LonTalk® communication applications.
Controls CO2 sensors Wall-mounted and duct-mounted CO2 sensors Table 30 - Specifications WaII-mounted Measuring range CO2 Accuracy at 25°C Non-linearity Duct-mounted 0-200 ppm <+/- [30 ppm CO2 + 2% of reading] (included repeatability and caiibration uncertainty) <+/- [40 ppm CO2 + 3% of reading] (included repeatability and calibration uncertainty) <1.0% full scale Ternperature dependence of output 0.3% full scale/°C Long-term stability <5.
Controls Power supply requirements CAUTION! Make sure that you connect the power wire only to the 24V terminal. Connecting the power wire to the output terminal may result in equipment damage. The CO2 sensor is designed to operate with a nominal 24 Vac supply. The power supply should maintain the voltage between 20 to 26 Vac. To connect the wall mounted CO2 sensor, Refer to the wiring diagram provided in the unit. Table 31 - CO2 sensor wire size Cross Maximum wire section Iength (mm2) (mn) 0.25 50 0.
Controls Mounting the duct-mounted CO2 sensor 1. Select a proper location on the duct to mount the CO2 sensor. 2. Drill a 22-25 mm hole in the mounting surface for sensor insertion (Figure 13). 3. Attach the mounting plate to the duct wall with four screws. 4. Insert the sensor through the mounting plate, adjusting the depth for optimal air sensing. CO2 sensor maintenance This CO2 sensor has excellent stability and requires no maintenance.
Controls Remote potentiometer To install the remote potentiometer, cut the jumper WL on the economizer ECA board, and connect the wires to P and P1. Note: This potentiometer allows to adjust the permanent fresh air intake from 0 to 50%. Note: This potentiometer allows to adjust the permanent fresh air intake from 0 to 50%. 0 W corresponds to closed fresh air damper. 270 W corresponds to 50% open fresh air damper. 0 W corresponds to closed fresh air damper. 270 W corresponds to 50% open fresh air damper.
Controls Fire thermostat There are two sensors in the fire thermostat Kit: Sensor X1310004001 is factory-set to open at 57°C. Sensor X13100040-02 is set to open at 115°C. Sensors are mounted directly in the ductwork. They should be installed where elements can respond quickly to air temperature changes. If not possible, the sensor may be installed on a suitable bracket so the air is drawn across the element. Sensor X13100040-01 has to be mounted in the return air duct.
Controls Clogged filter detector This device is mounted in the filter section. The sensor measures the difference in pressure before and after the filter section. The information is sent to the THP03 thermostat, to a Tracker™ or to a BMS. Smoke detector This device is used to detect smoke in the air stream. It includes a factory mounted detector connected to a central panel, both fitted in the fan section. When smoke is detected, it shuts off the unit.
Controls Other accessories available Communication Interfaces Remote temperature sensor to be used with THS/THP 01-02 TRANE Communication Interface (TCI-R) board TZS01: Remote room temperature sensor to be used with THS/THP 03, Tracker or Varitrac systems. This is an electronic board, factorymounted in the main control panel, needed to allow communication between a TRANE Integrated Comfort system (TRACKER or Varitrac CCP2) and the unit.
Unit Options Hot water coil (Down flow units only) In order to prevent water to freeze up in the coil during unoccupied period or shutdown limited period, a thermostat opens when there is a risk of freeze-up. The services of a water treatment specialist are recommended if water used can cause scaling deposits or erosion. Insulate all the water piping likely to be exposed to freezing temperatures in order to avoid freeze up of the coil and heat losses.
Unit Options Electric Heater Soft Starter Electric heaters are fitted on the fan discharge. The soft starter is used to achieve a progressive supply fan start and a reduced starting current as well as the motor starting torque. This option is well adapted for textile duct applications. It is factory installed in the main control panel.
Unit Options 0 - 25% fresh air hood This option includes for the hood itself, a wire mesh and a slidable damper. The 0-25% fresh air hood allows to introduce fresh air into the unit. The slidable damper has to be adjusted manually by removing the screws and sliding it off up or down (Figure 20). This is a manual device fitted on the back of the unit, sized for a maximum of 25% of the nominal rooftop air flow. The amount of fresh air introduced is then permanently fixed.
Unit Options Barometric relief This option includes exhaust hoods and gravity dampers located in the return air section (Figure 22). When the pressure of the building increase, the gravity dampers open and relieve air to the outside. The barometric relief allows to minimize overpressure in the building caused by the introduction of fresh air. This option is typically installed when fresh air intake is below 25% of the nominal air flow and when the return air pressure drop is below 25Pa.
Operation Operation with a conventional thermostat • The ReliaTel module has conventional thermostat connections as well as Zone Sensor Module connections. When a conventional thermostat is controlling the unit, operation differs as follows. • Supply Air Tempering feature is not available. If outdoor air is being introduced through the equipment, discharge air temperature may be cold when not actively heating. • Proportional Integral (PI) control is not available.
Operation Thermostat signals are as follows: R 24VAC power to thermostat Y1 Call for compressor 1 or first stage cooling Y2 Call for compressor 2 or 2nd stage cooling G Call for supply fan W1 Call for heat 1 W2 Call for heat 2 Conventional thermostat – Gas/ Electric, Electric Heat: Function when Input/connection energized : G (fan) Fan runs continuously except during unoccupied mode (see next page) Y1 (compressor 1 Compressor #1 runs or economizer) or economizer operates Heat pump only: X2 Call for emerge
Operation Unoccupied mode: Cooling/Economizer Operation: If the thermostat being used is programmable, it will have its own strategy for unoccupied mode and will control the unit directly. If a mechanical thermostat is being used, a field applied time clock with relay contacts connected to J6-11 and J6-12 can initiate an unoccupied mode as follows: • Contacts open: Normal occupied operation. • Contacts closed: Unoccupied operation as follows - Fan in auto mode regardless of fan switch position.
Operation Setting the economizer or 0-50% motorized hood (option) The ECA board is mounted on the damper actuator. To access the ECA board on economizers: • Remove the access panel located on the economizer section. • The electrical power must be disconnected to set the minimum position and check the economizer. • Disconnect the power supply, put the thermostat fan selector to "ON" and the "HEAT/COOL" selector to "OFF". This puts the damper in the minimum ventilation position.
Operation Figure 22 - Minimum fresh air adjustment + 1 EXF 2 1 MAT 2 MIXED SENSOR MIXED AIR AIR SENSOR INPUT INPUT COMMO COMMON OMMON COMMON OMMON COMMO OHS OHS INPUT INPUT 1 OAH AH/ 2 OAE NOT TUSED-OAT USEDOAT T ISIS NOT CONNECTED ONNECTED TO O RTR TRM CONNECTED TO 1 OAT 2 RA INPUT RA A INPU T COMMON COMMO OMMON 1 RAT 2 COMMON COMMO OMMON RHS RHSINPUT INPUT 1 RAH AH/ 2 RAE CO INPUT CO2 O2 SENSOR INPU T 2 SENSOR COMMON COMMO OMMON 1 DCV 2 P P1 2-10 VDC + FEEDBACK FEEDBACK INPUT INPUT 2-10VDC V
Operation Test procedures Operating checklist before start-up • Unit is level, with sufficient clearance all round • Duct network is correctly sized according to the unit configuration, insulated, and water-tight • Condensate drainage line is correctly sized, equipped with a trap, and sloped • Filters are in position, of correct size and quantity and clean • Wiring is correctly sized and connected in accordance with wiring diagrams • Power supply lines are protected by recommended fuses and correctly earthe
Operation Test modes There are 2 methods in which the "Test" mode can be cycled with the test button: 1. Step Test Mode This method initiates the different components of the unit, one at a time, by temporarily shorting across the two test terminals for two to three seconds. For the initial startup of the unit, this method allows the technician to cycle a component "On" and have up to 1 hour to complete the check. 2.
Operation Unit start-up Verification of gas valve settings (Reserved for the qualified gas technician) WARNING! Improper gas valve setting may lead to burner destruction and people injury. Note: Unit to be installed outside only. Note: Expansion valve must be adapted to the type of gas used: • G 20: 20 mb • G 25: 25 mb • G 31 (Propane): 37 or 50 mb Note: Unit factory-set for G20.
Operation Table 37 - Marking category of the gas section in different countries Country Category Type of gas G20 FR II2E+3P CH+ES-GB-IE-PT II2H3P IT II2H3+ NL II2L3P Pressure in mbar - BE I2E+ & I3P LU-DE I2E & I3P AT-DK-Fl-SE I2H 20 20 20 20 20 20 G25 25 - - 25 25 20 - G31 37 37 37 30 37 50 - Table 38 - Gas burner data YK* 155-175-200-225 G350 1 Burner G350 Natural Gas G20 (20mbar) 34.
Operation Starting the unit in cooling mode Operating pressures Before start-up, ensure that all power cables are tightened. After the unit has operated in cooling mode for a short period of time, install pressure gauges on the gauge ports of the discharge and suction line valves. Verify that the unit airflow rate is adjusted according to the information provided in the "Supply fan adjustment" section of this manual.
Operation ReliaTel™ is a microelectronic control feature, which provides operating functions that are significantly different from conventional electro-mechanical units. The master module is the ReliaTel™ Refrigeration Module (RTRM). The RTRM provides compressor antishort cycle timing functions through minimum "Off" and "On" timing to increase reliability, performance and to maximize unit efficiency.
Operation Low Ambient Operation During low ambient operation, outside air temperature below 13ºC, the RTRM will cycle the compressor and outdoor fan motor "Off" for approximately three minutes after every 10 minutes of accumulated compressor run time. The supply fan motor (IDM) will continue to operate during this evaporator defrost cycle (EDC) and the compressor and outdoor fan will return to normal operation once the defrost cycle has terminated and the compressor "Off" time delay has been satisfied.
Operation Economizer Set-Up Adjusting the minimum position potentiometer located on the unit economizer Actuator (ECA) sets the required amount of ventilation air. Two of the three methods for determining the suitability of the outside air can be selected utilizing the enthalpy potentiometer on the ECA, as described below: 1. Ambient Temperature controlling the economizing cycle by sensing the outside air dry bulb temperature. The Table below lists the selectable dry bulb values by potentiometer setting. 2.
Operation Refer to the ignition control module diagnostics section for the LED diagnostic definitions. Final installation checklist • When the fan selection switch is set to the "Auto" position, the RTRM energizes the supply fan relay (F) coil approximately 30 second after initiating the heating cycle to start the supply fan motor (IDM). • The automatic reset high limit (TCO1), located in the bottom right corner of the burner compartment, protects against abnormally high leaving air temperatures.
Maintenance End user routine maintenance To keep the unit operating safely and efficiently, the manufacturer recommends that a qualified service technician check the entire system at least once each year, or more frequently if conditions warrant it. Some of the periodic maintenance functions for the unit can be undertaken by the end user.
Maintenance Note: Do not attempt to clean disposable filters. Permanent filters can be cleaned by washing with a mild detergent and water. Ensure that the filters are thoroughly dry before reinstalling them in the unit (or duct system). Note: Replace permanent filters annually if washing fails to clean them, or they show signs of deterioration. Be sure to use the same type and size as were originally installed.
Maintenance Troubleshooting The RTRM has the ability to provide the service personnel with some unit diagnostics and system status information. Before turning the main power disconnect switch "Off", follow the steps below to check the ReliaTel™ Refrigeration Module (RTRM). All diagnostics & system status information stored in the RTRM will be lost when the main power is turned "Off". 1. Verify that the Liteport LED on the RTRM is burning continuously. If the LED is lit, go to Step 3. 2.
Maintenance Below is the complete listing of failure indication causes: System failure Check the voltage between terminals 6 and 9 on J6, it should read approximately 32 VDC. If no voltage is present, a system failure has occurred. Refer to Step 4 in the previous section for the recommended troubleshooting procedure.
Maintenance Service Failure Measure the voltage between terminals J6-10 & J6-6. Clogged Filter = Approximately 32 VDC. Normal = Less than 1 VDC, approximately 0.75 VDC Fan Failure = voltage alternates between 32 VDC & 0.75 VDC. To use LED's for quick status information at the unit, purchase a ZSM and connect wires with alligator clamps to terminals 6 through 10. Connect each respective terminal wire (6 through 10) from the Zone Sensor to the unit J6 terminals 6 through 10.
Maintenance Zone Temperature Sensor (ZTS) Test Note:These procedures are not for programmable or digital models and are conducted with the Zone Sensor Module electrically removed from the system. Test 1 Zone Temperature Thermistor (ZTEMP) This component is tested by measuring the resistance between terminals 1 and 2 on the Zone Temperature Sensor. RT-SVX19A-E4 Table 42 - Thermistor Resistance / Temperature Chart Temperature/resistance coefficient is negative.
Literature order number A business of American Standard Companies www.trane.com For more information, contact your local Trane sales office or e-mail us at comfort@trane.com RT-SVX19A-E4 Date 0805 Supersedes RT-SVX04A and RT-SVX05A Literature stocking location Europe Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.
