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.

©2020 Trane BAS-SVU10C-EN
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
Copyright
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

BAS-SVU10C-EN 11
Screw Terminal Arrangement
The screw terminals are arranged as follows.
Figure 5. Screw terminal diagram
Observe the following wiring considerations and requirements:
• If the same power source is used for auxiliary heating stages, install jumper across RC and RH.
Maximum current is 2.0 amps.
• If auxiliary output is used to toggle occupancy of the electronic control card inside the
equipment, configure the relay parameter (Aux cont) to the N.O. setting. A second relay can be
added for additional functionality of the occupancy output.
• Electromechanical contacts are to be used with the digital inputs. Electronic triacs cannot be
used as a means of switching for the input. The switched leg to the input for the input to activate
is terminal C (common).
• The transformer of the unit provides power to the thermostat and the additional loads that will
be wired to the thermostat.
AU D1 D2 RS Scom OS MS
Y2 Y1 GRC CRH W1 O/B
7 Pole bottom connector
5 Pole left top connector 3 Pole left top connector

12 BAS-SVU10C-EN
Detailed Wiring Diagram Models
Figure 6. Wiring diagram

BAS-SVU10C-EN 13
User Menu Flow Chart
The following flow diagram indicates the menu items in order of appearance.
Figure 7. User menu flow chart

14 BAS-SVU10C-EN
Status Display Instructions
The thermostat features a two-line, eight-character display. There is a low level back-light level that
is always active and can only be seen at night. When left unattended, the thermostat has an auto
scrolling display that shows the actual status of the system. Each item is scrolled one by one with
the back lighting off. Pressing any key will cause the back light to come on.
Sequence of Auto-Scroll Status Display
Room
Temperature System Mode Schedule Status Outdoor Temperature Alarms
Room Temp
x.x°C or °F Sys mode auto Occupied Outdoor x.x°C or °F Service
Sys mode off Unoccup Frost ON
Sys mode heat Override SetClock
Sys mode cool Filter
Sys mode
emergenc Fan lock
Manual scroll of each menu item is achieved by pressing the Yes (scroll) key repetitively. The last
item viewed will be shown on the display for 30 seconds before returning to automatic scrolling.
Temperature is automatically updated when scrolling is held.
The outdoor air temperature display is enabled only when an outdoor air temperature sensor is
connected.
A maximum range status display of 50°C (122°F) indicates a shorted sensor. Associated functions,
such as mode lockouts and economizer function are automatically disabled.
A minimum range status -40°C (-40°F) is not displayed and indicates a opened sensor or a sensor
not connected. Associated functions, such as mode lockouts and economizer function are
automatically disabled.
If alarms are detected, they are automatically displayed at the end of the status display scroll.
During an alarm message display, the back lit screen lights up at the same time as the message and
shuts off during the rest of the status display. Two alarms maximum can appear at any given time.
The priority for the alarms is as follows:
Frost ON Indicates that the heating is energized by the low limit frost protection room
temperature setpoint 5.6°C (42°F)
SetClock Indicates that the clock needs to be reset. There has been a power failure which
has lasted longer than 6 hours
Service Indicates that there is a service alarm as per one of the programmable digital input
(DI1 or DI2)
Filter Indicates that the filtersare dirty asper one of the programmabledigital input(DI1
or DI2)
Fan lock Indicates that the heating and cooling actions are locked out due to a defective
fan operation
Three status LEDs on the thermostat cover are used to indicate the status of the fan, a call for heat,
or a call for cooling.
LED Operation Trane Heat Pump Models
Fan LED on When G Fan terminal operates
Heating LED on When Y1 and / or W1 terminal(s) operate in heating mode
Cooling LED on When Y1 terminal operate in cooling mode

Figure 8. Heat pump models
BAS-SVU10C-EN 15
Status Display Instructions

16 BAS-SVU10C-EN
User Programming Instructions Menu
The Trane Communicating Thermostat features an intuitive, menu-driven, back-lit LCD display that
walks users through the programming steps, making the programming process extremely simple.
This menu is typically accessed by the user to set the parameters such as temperature and time
events, system mode, fan mode, and so on.
It is possible to bring up the user menu at any time by depressing the MENU key. The status display
automatically resumes after exiting the user-programming menu.
If the user pauses at any given time during programming, Auto Help text is displayed to help and
guide the user through the usage and programming of the thermostat.
Example: Press yes key to change cooling temperature setpoint.
Use the up or down arrow to adjust cooling setpoint.
Each of the sections in the menu are accessed and programmed using five keys on the thermostat
cover.
The priority for the alarms is as follows:
The YES key is used to confirm a selection, to move onto the next menu item and to manually scroll
through the displayed information.
The NO key is used when you do not desire a parameter change, and to advance to the next menu
item. It can also be used to toggle between heating and cooling setpoints.
The MENU key is used to access the Main User Menu or exit the menu.
The down arrow key is used to decrease temperature setpoint and to adjust the desired values when
programming and configuring the thermostat.
The up arrow key is used to increase temperature setpoint and to adjust the desired values when
programming and configuring the thermostat.
When left unattended for 45 seconds, the display will resume automatic status display scrolling.
To turn on the back light, press any key on the front panel. The back lit display will turn off when
the thermostat is left unattended for 45 seconds.

BAS-SVU10C-EN 17
The User Menu Sequence
Override
Resume Temperature setpoints System mode setting Fan mode setting
Override
schd Y/N Temperat set Y/N Sys mode set Y/N Fan mode set Y/N
Appears only in
unoccupied mode
Cancel
ovrd Y/N
Appears only in
override mode
There is a default profile set in the thermostat from the factory. This enables the thermostat to
operate as a non-programmable unit in day mode operation at start up.
Programmed default temperature
setpoints: Programmed default modes:
Occupied cooling setpoint = 75°F (24°C) System mode = Auto
Occupied heating setpoint = 72°F (22°C)
Fan mode = Smart (for models with a
communication module or programmable stand-
alone models)
Fan mode = Auto (for non-programmable stand-
alone models)
Unoccupied cooling setpoint = 82°F (28°C)
Unoccupied heating setpoint = 65°F (18°C)
Fahrenheit scale
Setpoint type = Permanent
Detailed Description of Menu Settings
Override an
unoccupied period
This menu will appear only when the thermostat is in unoccupied mode. The
unoccupied mode is enabled either by the internal timer scheduling or by a
remote NSB contact via DI1 or DI2.
Override schd Y/N If DI1 or DI2 is configured to operate as a remote temporary override
contact, this menu will be disabled.
Answering yes to this prompt will cause the thermostat to go into occupied
mode for an amount of time equal to the parameter “TOccTime” (1 to 12
hours).
Resume regular
scheduling This menu does not appear in regularoperation. It will appear only when the
thermostat is in Unoccupied override mode.
Cancel Ovrd Y/N Answering “Yes” to this question will cause the thermostat to resume the
regular programmed setpoints scheduling.
Permanent
setpoint changes
This menu permits the adjustment of all permanent temperature setpoints
(occupied and unoccupied) as well as the desired temperature units (°F or
°C). Permanent setpoints are written to RAM and EEPROM.
Temperat set Y/N

Cooling setpoint Occupied
mode Heating setpoint Occupied mode Cooling setpoint Unoccupied mode
Cooling
set? Y/N No next Yes down Heating set? Y/N No next Yes down Unocc CL set? Y/N No next Yes down
Use ▲▼ keys to set value, Yes key to confirm
Cooling
70.0°F Use ▲▼ To set
value Heating
68.0°F Use ▲▼ To set
value Unocc CL
80.0°F Use ▲▼ To set
value
Heating setpoint Unoccupied
mode °F or °C display setting
Unocc
HT set? Y/N No next Yes down °F or °C set? Y/N No next Yes down
Use ▲▼ keys to set value, Yes key to confirm
Unocc HT 60.0°F Use ▲▼ To set
value Units °F Use ▲▼ To set value
18 BAS-SVU10C-EN
The User Menu Sequence
Temporary Setpoint Changes
(▲)(▼)Temporary setpoints can be modified through the Up arrow key and the Down arrow
keys.
(Heating or Cooling) You are prompted with the present mode of the thermostat and its setpoint.
(▲)The Up arrow key will increment the setpoint by 0.5 degree (°F or °C).
(▼)The Down arrow key will decrement the setpoint by 0.5 degree (°F or °C).
Press the Yes key to accept the new setpoint.
Notes:
•Local changes to the heating or cooling setpoints made directly using the up or down arrow are
temporary.
•Local changes remain effective for the duration specified by ToccTime.
•Setpoints revert back to their default value after internal timer ToccTime expires.
•If a permanent change to the setpoints is required, use the Temperat set? menu.
System mode
setting This menu is accessed to set system mode operation
Use ▲▼ keys to set value, Yes key to confirm.
Sys mode Y/N
Sys mode auto Automatic mode
Automatic changeover mode between heating and cooling operation
Sys mode cooling Cooling mode
Cooling operation mode only
Sys mode heating Heating mode
Heating operation mode only
Sys mode emergency Emergency heat mode (heat pump models only)
Forced auxiliary heat operation mode only
Sys mode off Off mode Normal cooling or heating operation disabled
If enabled in installer parameters, only the automatic heating frost protection at 50°F
(10°C) is enabled

Fan mode
setting This section of the menu is permits the setting of the fan mode operation.
Use ▲▼ keys to set value, Yes key to confirm.
Sys mode Y/N
Fan mode On On fan mode
Fan is on continuously, even when system mode is OFF.
Fan mode Auto Automatic fan mode
Fan cycles on a call for heating or cooling for both occupied and unoccupied periods.
Fan mode Smart
Smart fan mode
During occupied periods, fan is on continuously. In unoccupied mode, fan cycles on
a call for heating or cooling.
This selection is available on all models with a communication module, on all stand-
alone programmable models or if DI1 or DI2 is set to RemNSB on stand-alone non-
programmable models.
BAS-SVU10C-EN 19
The User Menu Sequence

20 BAS-SVU10C-EN
Installer Configuration Parameter Menu
You can perform configuration through the network or locally at the thermostat.
1. Press and hold the middle button Menu for 8 seconds to enter configuration.
2. If a password lockout is active, “Password” is prompted. Enter the password value using the
up and down arrows and press Yes to gain access to all configuration properties of the
thermostat.
(A wrong password entered prevents local access to the configuration menu.)
3. Once in the configuration menu, press the No button repetitively to scroll between all the
available parameters.
4. When the desired parameter is displayed, press Yes to adjust it to the desired value using up
and down arrows. Once set, press Yes to scroll to the next parameter.
Configuration
parameters Significance Default value Adjustments
Pswrd
Configuration
parameters menu
access password
Default value = 0 (no
password prompted)
This parameter sets a protective access password to prevent unauthorized access to the configuration
menu parameters. A default value of “0” will not prompt a password or lock the access to the
configuration menu.
Range is: 0 to 1000
Com addr
Thermostat networking
address
Default value = 254
Range is: 0 to 254
Conditional parameter to BACnet MS/TP models (VT76xxX5x00B)
This parameter will only appear when a BACnet or wireless network adapter is present. If the BACnet
adapter has been removed or replaced with an Echelon adapter, the parameter will not be used or
displayed.
For BACnet MS/TP models valid range to use is from 1 to 127. Default value of 254 disables BACnet
communication for the thermostat.
DI 1
Digital input no.1
configuration
Open contact input =
function not energized
Closed contact input =
function energized
Default value = None
None, No function will be associated with the input.
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 time is still displayed as information, but the
menu part related to scheduling is disabled and no longer accessible.
Open contact = occupied setpoints
Closed contacts = unoccupied setpoints
RemOVR Temporary override remote 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
possibletotogglebetweenunoccupiedandoccupiedsetpointsfor theamountoftimesetbyparameter
(TOccTime) temporary occupancy time. When Override is enabled, an Override status message will
be displayed.
Filter, a back-lit flashing Filter alarm will be displayed on the thermostat LCD screen when the input
is energized.
Service, a back-lit flashing Service alarm will be displayed on the thermostat LCD screen when the
input is energized.
Fan lock, a back-lit flashing Fan lock alarm will be displayed on the thermostat LCD screen when the
input is not energized. Used in conjunction with a local airflow sensor connected to the input. Locks
out the thermostat heating and cooling action if no airflow is detected 10 seconds after the fan (G
terminal) is energized.
Open contact = no airflow
Closed contacts = airflow present
DI 2 Digital input no. 2
configuration
Default value = None Same as above. It is possible to configure both inputs to have the same function.
MenuScro Menu scroll Default value = On =
Scroll active
Removes the scrolling display and only present the room temperature/humidity to the user. With this
option enabled, no status is given of mode, schedule and outdoor temperature.
On = Scroll active
Off = Scroll not active