Trane X13511542010 User manual

Trane Communicating Thermostats

for Heat Pump Control

BACnet MS/TP version X13511542010

User Guide

August 2020 BAS-SVU10C-EN

SAFETY WARNING

Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of

heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training.

Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury.

When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are

attached to the equipment.

Introduction

Warnings, Cautions, and Notices

Safety advisories appear throughout this manual as required. Your personal safety and the proper

operation of this machine depend upon the strict observance of these precautions.

The three types of advisories are defined as follows:

WARNING Indicates a potentially hazardous situation which, if not avoided, could result in

death or serious injury.

CAUTIONsIndicates a potentially hazardous situation which, if not avoided, could result in

minor or moderate injury. It could also be used to alert against unsafe practices.

NOTICE Indicates a situation that could result in equipment or property-damage only

accidents.

Important Environmental Concerns

Scientific research has shown that certain man-made chemicals can affect the earth’s naturally

occurring stratospheric ozone layer when released to the atmosphere. In particular, several of the

identified chemicals that may affect the ozone layer are refrigerants that contain Chlorine, Fluorine

and Carbon (CFCs) and those containing Hydrogen, Chlorine, Fluorine and Carbon (HCFCs). Not all

refrigerants containing these compounds have the same potential impact to the environment.

Trane advocates the responsible handling of all refrigerants-including industry replacements for

CFCs and HCFCs such as saturated or unsaturated HFCs and HCFCs.

Important Responsible Refrigerant Practices

Trane believes that responsible refrigerant practices are important to the environment, our

customers, and the air conditioning industry. All technicians who handle refrigerants must be

certified according to local rules. For the USA, the Federal Clean Air Act (Section 608) sets forth the

requirements for handling, reclaiming, recovering and recycling of certain refrigerants and the

equipment that is used in these service procedures. In addition, some states or municipalities may

have additional requirements that must also be adhered to for responsible management of

refrigerants. Know the applicable laws and follow them.

WARNING

Proper Field Wiring and Grounding Required!

Failure to follow code could result in death or serious injury. All field wiring MUST be

performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE

and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field

wiring installation and grounding as described in NEC and your local/state electrical codes.

Failure to follow code could result in death or serious injury.

WARNING

Personal Protective Equipment (PPE) Required!

Failure to wear proper PPE for the job being undertaken could result in death or serious injury.

Technicians, in order to protect themselves from potential electrical, mechanical, and chemical

hazards, MUST follow precautions in this manual and on the tags, stickers, and labels, as well

as the instructions below:

• Before installing/servicing this unit, technicians MUST put on all PPE required for the work

being undertaken (Examples; cut resistant gloves/sleeves, butyl gloves, safety glasses, hard

hat/bump cap, fall protection, electrical PPE and arc flash clothing). ALWAYS refer to

appropriate Safety Data Sheets (SDS) and OSHA guidelines for proper PPE.

• When working with or around hazardous chemicals, ALWAYS refer to the appropriate SDS

and OSHA/GHS (Global Harmonized System of Classification and Labeling of Chemicals)

guidelines for information on allowable personal exposure levels, proper respiratory

protection and handling instructions.

• If there is a risk of energized electrical contact, arc, or flash, technicians MUST put on all PPE

in accordance with OSHA, NFPA 70E, or other country-specific requirements for arc flash

protection, PRIOR to servicing the unit. NEVER PERFORM ANY SWITCHING,

DISCONNECTING, OR VOLTAGE TESTING WITHOUT PROPER ELECTRICAL PPE AND ARC

FLASH CLOTHING. ENSURE ELECTRICAL METERS AND EQUIPMENT ARE PROPERLY RATED

FOR INTENDED VOLTAGE.

WARNING

Follow EHS Policies!

Failure to follow instructions below could result in death or serious injury.

• All Trane personnel must follow the company’s Environmental, Health and Safety (EHS)

policies when performing work such as hot work, electrical, fall protection, lockout/tagout,

refrigerant handling, etc. Where local regulations are more stringent than these policies,

those regulations supersede these policies.

• Non-Trane personnel should always follow local regulations.

Introduction

BAS-SVU10C-EN 3

This document and the information in it are the property of Trane, and may not be used or

reproduced in whole or in part without written permission. Trane reserves the right to revise this

publication at any time, and to make changes to its content without obligation to notify any person

of such revision or change.

Trademarks

All trademarks referenced in this document are the trademarks of their respective owners.

Revision History

Miscellaneous edits.

Table of Contents

4BAS-SVU10C-EN

Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Features Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Heat Pump Model Specific Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Before Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Thermostat Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Screw Terminal Arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Detailed Wiring Diagram Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

User Menu Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Status Display Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Sequence of Auto-Scroll Status Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

User Programming Instructions Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

The User Menu Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Detailed Description of Menu Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Temporary Setpoint Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Installer Configuration Parameter Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Troubleshooting Guide (All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Drawings and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

BAS-SVU10C-EN 5

Product Overview

The Trane Communicating Heat Pump Thermostat is specifically designed for control of self-

contained heating/cooling heat pump units. The product features an intuitive, menu-driven, back-

lit LCD display, which walks users through the programming steps, making the process extremely

simple. Accurate temperature control is achieved due to the product’s PI time proportional control

algorithm, which virtually eliminates temperature offset associated with traditional, differential-

based thermostats.

Two digital inputs can be set by the installer to monitor filter status, activate a remote temporary

occupancy switch, and/or used as a general purpose service indicator.

Three remote sensor inputs are provided: Remote room or return air temperature, outdoor air

temperature, and supply air temperature for monitoring purposes.

An SPST auxiliary switch output that operates with the occupancy can be used to control lighting

or disable the economizer minimum fresh air function.

The thermostats are also compatible with the occupancy sensor cover accessories. Thermostats

equipped with an occupancy sensor cover provide advanced active occupancy logic, which will

automatically switch occupancy levels from Occupied to Unoccupied as required by local activity

being present or not. This advanced occupancy functionality provides advantageous energy

savings during occupied hours without sacrificing occupant comfort.

Features and Benefits

Features Benefits

Advanced occupancy functions Through the network or smart local occupancy sensing

Ready for occupancy sensor accessory

cover Fully integrated advanced occupancy functionality with a

occupancy sensor accessory cover

Two extra digital inputs Adds functionality

Smart fan operation Saves energy during night mode

Unique configuration key with password

protection Minimizes parameter tampering

Lockable keypad Tamper proof, no need for thermostat guards

Remote room and outdoor temperature

sensor Increase flexibility and functionality

Auxiliary output Can be used for lighting and/or economizer override

Discharge air sensor input Can be used to monitor unit efficiency

Theory of Operation

The Trane Communicating Thermostat uses a proprietary adaptive logic algorithm to control the

space temperature. This algorithm controls the heating / air conditioning system to minimize

overshoot while still providing comfort. It provides exceptional accuracy due to its unique PI time

proportioning control algorithm, which virtually eliminates temperature offset associated with

traditional, differential-based on/off thermostats.

Figure 1. On/off mechanical control vs pi electronic control

6BAS-SVU10C-EN

Product Overview

Features Overview

The Trane Communicating Thermostat includes the following features:

• Remote outdoor sensing capability for added flexibility

– System mode lock out

– Heat pump balance point settings

• Remote discharge air sensor input for monitoring purpose

– System efficiency feedback

• Lockable keypads for tamper proofing (No need for thermostat guards)

• Automatic frost protection to prevent costly freeze damage

• Anti short cycle and minimum on/off run time protection. Reduces wear and maximizes life

span of mechanical equipment

• Two programmable digital inputs for added flexibility. Each input can be programmed as the

following:

–None: No function will be associated with the input.

–Service: A backlit flashing Service alarm will be displayed on the thermostat LCD screen

when the input is energized. It can be tied in to the AC unit control card, which provides an

alarm in case of malfunction.

–Filter: A backlit flashing Filter alarm will be displayed on the thermostat LCD screen when

the input is energized. It can be tied to a differential pressure switch that monitor filters.

–Rem NSB: Remote NSB timer clock input. Will disable the internal scheduling of the

thermostat. The scheduling will now be set as per the digital input. The menu part related

to scheduling is disabled and no longer accessible. It provides low cost setback operation

via occupancy sensor or from a dry contact.

–RemOVR: Temporary occupancy contact. Disables all override menu function of the

thermostat. The override function is now controlled by a manual remote momentarily

closed contact. When configured in this mode, the input operates in a toggle mode.

With this function enabled it is now possible to toggle between unoccupied and occupied

setpoints for the amount of time set by parameter (TOccTime) temporary occupancy time.

BAS-SVU10C-EN 7

Product Overview

–Fan lock: Used in conjunction with a local air flow sensor connected to the input. Locks out

the thermostat heating and cooling action and displays a local alarm if no air flow is detected

10 seconds after the fan (G terminal) is energized.

• Programmable smart fan operation saves energy during night mode

• Non volatile EEPROM memory prevents loss of parameters during power shortage

• Built in default profile set-up for easier start up and commissioning

• Configurable SPST output relay on programmable models for lighting, exhaust fan or fresh air

control

Heat Pump Model Specific Features

The Trane Communicating Thermostat includes the following features:

• Selectable single or dual stage compressor stages

• High balance point:

Locks out auxiliary heating when outside air temperature is above this value

•Low balance point:

Locks out heat pump compressor operation when outside air temperature is below this value

• Comfort/economy mode:

In economy mode, heat pump use is maximized before turning on auxiliary heating

• Compressor/auxiliary interlock:

Adds flexibility by locking out heat pump operation during auxiliary heating to prevent high

pressure trip when the coil is downstream of the auxiliary heat source

8BAS-SVU10C-EN

Installation

This section explains preliminary installation tasks, location considerations, and the installation

procedure.

Before Installation

Complete the following steps:

1. Remove the security screw on the bottom of Terminal Equipment Controller cover.

2. Open unit by pulling on the bottom side of Terminal Equipment Controller (see the below

figure).

3. Remove wiring terminals from sticker.

Figure 2. Opening unit

Thermostat Location

Install the thermostat

• On an inside wall only.

• Away from any direct heat source.

• Away from any air discharge grill.

• Away from direct sun radiation.

Nothing should restrict vertical air circulation to the Terminal Equipment Controller.

Installation Procedure

1. Swing open the Terminal Equipment Controller PCB to the left by pressing the PCB locking tabs

(Figure 3, p. 9).

2. Pull out cables 6 inch out from the wall.

3. Wall surface must be flat and clean.

4. Insert cable in the central hole of the base.

BAS-SVU10C-EN 9

Installation

5. Align the base and mark the location of the two mounting holes on the wall. Install proper side

of base up.

6. Install anchors in the wall.

7. Insert screws in mounting holes on each side of the base (see the figure below).

Figure 3. Location of PCB retaining tabs

8. Gently swing back the circuit board on the base and push on it until the tabs lock it.

9. Strip each wire 1/4 inch from end.

10. Insert each wire according to wiring diagram.

11. Gently push excess wiring back into hole (see the figure below).

12. Re-install wiring terminals in their correct locations (see the figure below).

13. Re-install the cover (top side first) and gently push extra wire length back into the hole in the

wall.

14. Install security screw.

Figure 4. Reinstall terminal blocks

CAUTION

Take adequate precautions during installation!

If replacing an existing Communicating RTU Thermostat, label the wires before removal of the

thermostat.

Electronic controls are static sensitive devices. Discharge yourself properly before

manipulating and installing the controller.

A short circuit or wrong wiring may permanently damage the Terminal Equipment Controller

or the equipment.

CAUTION

Use proper safety measures to protect system!

All Communicating RTU thermostats are for use as operating controls only and are not safety

devices. These instruments have undergone rigorous tests and verifications prior to shipment to

ensure proper and reliable operation in the field. Whenever a control failure could lead to

personal injury and/or loss of property, it becomes the responsibility of the user / installer /

electrical system designer to incorporate safety devices (such as relays, flow switch, thermal

protections, etc.) and/or an alarm system to protect the entire system against such catastrophic

failures. Tampering with the devices or misapplication of the device will void warranty.

10 BAS-SVU10C-EN

Installation

Table of contents

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