Trane BAS-SVX36C Standard and Programmable Thermostats Installation Manual

Trane BAS-SVX36C Standard and Programmable Thermostats Installation

Introduction

This document provides installation, operation, and troubleshooting information for three Trane models of push-button thermostats:

• TheTrane Programmable 3-Heat/2-CoolThermostat:
  • Trane PLM # X13511537-01
  • Trane Clarksville part # BAYSTAT150A
  • Service parts #THT02774
• TheTrane (non-programmable) 3-Heat/2-CoolThermostat:
  • Trane PLM # X13511536-01
  • Trane Clarksville part # BAYSTAT155A
  • Service parts #THT02773
• TheTrane (non-programmable) 1-Heat/1-CoolThermostat:
  • Trane PLM # X13511535-01
  • Trane Clarksville part # BAYSTAT151A
  • Service parts #THT02772
  • Note: To identify the thermostat type, locate the Trane PLM # and the Trane PLM #/Trane Clarksville # on the thermostat circuit board.

Dimensions

• Figure 1 and Figure 2 provide dimensions for each type of thermostat. The two non-programmable thermostats have the same dimensions; the programmable thermostat has slightly different dimensions.
• Figure 1. ProgrammableThermostat Dimensions
• Note: Drawing not to scale. Dimensions within ± 0.02 in. (± 0.5 mm)
• Figure 2. 1-Heat/1-Cool or 3-Heat/2-Cool (non-programmable)Thermostat Dimensions

Pre-Installation

This section provides the following pre-installation information:

• Location considerations
• Height requirements
• Mounting surfaces
• Maximum wire length

Location Considerations

When selecting a location, avoid the following:

• Areas of direct sunlight
• Areas in the direct airstream of air diffusers
• Exterior walls and other walls that have a temperature differential between the two sides
• Areas that are close to heat sources such as sunlight, appliances, concealed pipes, chimneys, or other heat-generating equipment
• Drafty areas
• Dead spots behind doors, projection screens, or corners
• Walls that are subject to high-vibration
• Areas with high humidity
• High-traffic areas (to reduce accidental damage or tampering)

Maximum Wire Lengths

Thermostat to HVAC Equipment

• The thermostat may not function properly if the total resistance of any of the thermostats to HVAC equipment wires exceeds 2.5 ohms. To ensure that wire length does not cause excess resistance, refer to Table 1 and ensure that the wires from the thermostat to the HVAC equipment are not too long.
• Table 1. MaximumThermostat to HVAC Equipment Wire Lengths
  

  Copper wire size	Maximum recommended wire length
  22 AWG (0.33 mm2)	150 ft (46 m)
  20 AWG (0.50 mm2)	240 ft (73 m)
  18 AWG (0.75 mm2)	385 ft (117 m)

• Remote Sensor to ProgrammableThermostat
• Because remote temperature sensors measure resistance, very long cable runs can cause slight errors in the measurement. For the highest temperature reading accuracy, avoid exceeding the maximum recommended wire lengths shown in Table 2.
• Table 2. Maximum Recommended Remote Sensor Wire Length
  

  Copper wire size	Maximum recommended remote sensor wire length
  22 AWG (0.33 mm2)	1000 ft (300 m)
  20 AWG (0.50 mm2)	1500 ft (450 m)
  18 AWG (0.75 mm2)	2500 ft (750 m)

  • Note: For 22 AWG (0.33 mm2) copper wires, the rate of error can be up to 0.5 °F (0.3 °C) per 100 OHM, which typically requires wire lengths in excess of 5000 ft (1500 m)

Installation

This section provides installation instructions. Before you begin, read through the pre-installation information, beginning on p. 9, and also verify the following conditions are met:

• A wire access hole is available at the thermostat location.
• The wires are accessible through the hole.
• The wires are attached to the appropriate terminals on the HVAC equipment.
• There is continuity (and not more than 2.5 ohms resistance) between the thermostat location and the HVAC equipment.
• The wires are accurately labeled or identified by color

General Practice

To wire the thermostat:

1. Connect the wires to the terminal block(s) packaged in the box with the thermostat. (The programmable thermostat has two terminal blocks, the non-programmable thermostats have only one):
   • Remove approximately 1/4 inch (6 mm) of insulation from the wires.
   • Use the terminal block screws to securely fasten each wire into the terminal block.
   • Refer to the section, “Terminal Identification,” p. 13, and the wiring diagrams on the pages that follow to determine the correct terminal for each wire.
   • Note: In some case,s the terminal labels (Y, G, R, etc.) correctly correspond to the first letter of the color wire to which they are connected. However, you must verify which equipment terminals are connected at the other ends of the wires before connecting the wires to the thermostat.
2. Align the pins on the circuit board with the holes on the bottom of the terminal blocks and gently push the wired terminal blocks into place on the circuit board. See Figure 5.
   • Figure 5. Attaching the wired terminal blocks to the pins on the circuit board

Wiring Diagrams

• The following diagrams show all of the common wiring scenarios you are likely to encounter.

1-Heat/1-CoolThermostat

• Use Table 3 and the diagrams that follow to correctly wire the thermostat for your system type.
• Table 3. SystemType Options for 1H/1C Non-ProgrammableThermostats
  

  System Type	Value for Option 01	See Diagram
  1-heat/1-cool, conventional	0	Figure 6
  1-heat/1-cool, heat pump without auxiliary heat	1	Figure 7
  1-heat only, conventional without fan	2	Figure 8
  1-heat only, conventional with fan	3	Figure 9
  1-cool, Conventional	4	Figure 10

Configuration

Adverse Control System Behavior

Improper configuration could cause unwanted, possibly adverse control system behavior. Be sure to configure the thermostat according to your system type. To change the installation configuration:

1. Apply electrical power to the thermostat.
2. See the appropriate table for your thermostat type to determine the configuration options you need:
   • Table 6, p. 27 for 3-Heat/2-Cool programmable thermostats
   • Table 7, p. 31 for 3-Heat/2-Cool non-programmable thermostats
   • Table 8, p. 32 for 1-Heat/1-Cool, non-programmable thermostats
3. Write down your selections or other notes on the table.
4. Enter installer configuration mode:

Live Electrical Components

• The circuit board is energized. Have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform this step. Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury.
  • a. Remove the thermostat cover.
  • b. Press and hold the configuration button for at least 3 sec

Table 6. Installation Options for 3-Heat/2-Cool programmable thermostat

Table 6. Installation Options for 3-Heat/2-Cool ProgrammableThermostat (continued)

Table 7. Installation Options for 3-Heat/2-Cool Non-programmable thermostat

Operation

• This section provides general descriptive and procedural information intended for typical daily operators of the thermostat.
• Icon Descriptions
• Figure 36 describes the icons visible on the front of the thermostat.
  • Note: Except when the thermostat is powering up, when all of the icons are shown for 2 sec, only some of the icons will be visible at once.
• Figure 36. Thermostat Icons

Operational and Programming Reference Information

• This section provides additional information that may be useful for understanding thermostat operation or programming.

Deadband

• The thermostat automatically maintains a temperature deadband between the heating setpoint and the cooling setpoint whenever automatic changeover (heat-to-cool or cool-to-heat mode) is enabled. The temperature range of the deadband is 2–9 °F (1.0–4.5°C) and is specified in the installation configuration options (see “Configuration,” p. 26). If you attempt to change a temperature setpoint to within the deadband of its opposing setpoint, the opposing setpoint will automatically be pushed to the next value that satisfies the deadband. (See Figure 38.)
• Heat and Cool Cycling Rate
• The heat and cool cycling rate, expressed in cycles per hour (CPH) indicates how often the heating or cooling system is turned on when the temperature is within the temperature differential from the setpoint, which is 1°F (0.5°C). There are ten options (1–10) for heat stages and five options (1–5) for cool stages. The number selected is the maximum number of times the stage is cycled in 1 hr. For example, when the system is set to 5 CPH, it runs at 12 min cycles with variable duty cycles.
• Depending on the heating or cooling load, which is measured by feedback from the sensor thermistor and/or temperature error, the system could run at 50% duty cycle (6 min ON and 6 min OFF), 80% duty cycle (9.6 min ON and 2.4 min OFF), or other variations of the duty cycle.
• Note: The cycling rate described above is only active when the temperature is within the temperature differential. If the temperature is outside of the temperature, the heating and cooling equipment will either be fully on or fully off accordingly. (See Figure 38.)
• Figure 38. General Heat and Cool Cycling Rate Diagram

Error Codes

Troubleshooting Table

Thermostat Specifications

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Trane BAS-SVX36C Standard and Programmable Thermostats Installation-FAQs