Viconics VT7600A, VT7652B, VT7652A, VT7600B, VT7605B Installation Manual

1 | PIR Ready VT76x7 Series-Installation Guide

CONTENTS

Installation 2

Location 2
Installation 2

Theory of operation 3

Features overview 4

Model Chart 5

Network ready 6

Terminal, Identification and Function 6

Wiring 6
Screw terminal arrangement 7

Typical applications 8

Remote humidity sensor accessories 9

Configuring and Status Display Instructions 10

Status display 10

User Interface 12

User configuring instructions menu 12
Local keypad interface 13
Occupied setpoints adjustments 14
Dehumidification process 16

Installer Configuration Parameter Menu 21
Troubleshooting guide 32
Humidity Control 34

Humidity reset 34
High limit humidity sensor 34

Specifications 35
Drawing & Dimensions 36

PIR Ready VT76x7 Series

With & Without Local Schedule &

With Humidification & Dehumidification

Strategy Terminal Equipment Controllers

Installation Guide

For Commercial HVAC Applications

May 3rd, 2012 / 028-0229-R4

2 | PIR Ready VT76x7 Series-Installation Guide

INSTALLATION

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

 Open unit by pulling on the bottom

side of Terminal Equipment
Controller (fig. 1).

 Remove wiring terminals from sticker.
 Please read the FCC ID and IC label

installed in the cover upon removal of
cover for the wireless products.

Location

1. Should not be installed on an outside
wall.

2. Must be installed away from any
direct heat source.

3. Should not be installed near an air
discharge grill.

4. Should not be affected by direct
sun radiation.

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

Installation

1. Swing open the Terminal
Equipment Controller PCB to the
left by pressing the PCB locking
tabs (fig. 2).

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

3. Wall surface must be flat and
clean.

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

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 (fig. 2).

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.

3 | PIR Ready VT76x7 Series-Installation Guide

11. Gently push excess wiring back into hole (fig. 3).

12. Re-Install wiring terminals in their correct locations (fig. 3).

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.

THEORY OF OPERATION

The VT7600 uses a Viconics 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 Terminal Equipment Controllers.

Fig.2 - On/Off mechanical control vs. PI electronic control.

 If replacing an existing Terminal Equipment Controller, label the wires

before removal of the Terminal Equipment Controller.

 Electronic controls are static sensitive devices. Discharge yourself

properly before manipulating and installing the Terminal Equipment
Controller.

 A short circuit or wrong wiring may permanently damage the Terminal

Equipment Controller or the equipment.

 All VT7000 series Terminal Equipment Controllers are designed for use

as operating controls only and are not safety devices. These instruments
have undergone rigorous tests and verification prior to shipping 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
unintended application of the devices will result in a void of warranty.

4 | PIR Ready VT76x7 Series-Installation Guide

Features overview

 7 day schedule models, 2 or 4 events

 Gas/oil or electric system compatibility for all type of applications
 Internal RH sensor and remote RH input with humidification and dehumidification

sequence of operation embedded

 Remote outdoor sensing capability for added flexibility

- System mode lock out

- Humidity setpoint reset

 High limit input to prevent over-humidification
 Lockable keypads for tamper proofing. No need for Terminal Equipment Controller

guards

 Automatic frost protection to prevents costly freeze damage
 Anti short cycle and minimum on/off run time protection. Reduces wear and maximizes

life span of mechanical equipment.

 Configurable digital input for added flexibility. The input can be configured as the

following:

 None: No function will be associated with the input
 Service: a backlit flashing Service alarm will be displayed on the Terminal

Equipment Controller 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 Terminal

Equipment Controller 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 Terminal Equipment Controller. 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 Terminal Equipment Controller. . 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 &

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

 Fan lock: used in conjunction with a local air flow sensor connected to the input.

Locks out the Terminal Equipment Controller heating and cooling action and
displays a local alarm if no air flow is detected 10 seconds after the fan (G
terminal) is energized.

 Configurable 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 scheduling models for lighting, exhaust fan or

fresh air control

 6 hour typical reserve time for clock in case of power loss
 Built in proportional humidity Terminal Equipment Controller
 Proportional humidity high limit when used with the analog input for supply humidity
 Automatic humidity setpoint reset when outside air temperature value is used.

5 | PIR Ready VT76x7 Series-Installation Guide

MODEL CHART

6 | PIR Ready VT76x7 Series-Installation Guide

Network ready

 All Viconics VT76x7 series Terminal Equipment Controllers are designed for

stand-alone (Network Ready) operation.

 They can be fully integrated into your choice of automation systems using the

available communication adapter options.

 If required, stand-alone (Network Ready) Terminal Equipment Controllers can be

field retrofitted with the following communication adapters:

o VCM7607V5000B, Terminal Equipment Controller BACnet™ MS-TP®

communication adapter

o VCM7607V5000E, Terminal Equipment Controller Echelon™

LonTalk® communication adapter

o VCM7000V5000W Terminal Equipment Controller wireless Zigbee™

communication adapter

TERMINAL, IDENTIFICATION AND FUNCTION

Wiring

Part Number

VT7657B5x00(X)

VT7607B5x00(X)

Schedule

Yes

No

Top left terminal block

Y2 X X

Y1 X X G X X RC X X C X

X

Top right terminal block

RH X X

W1 X X

W2 X X

Bottom terminal block

HUM X X

AUX X X

DEHUM

X X DI X X

HS X X

SCOM

X X OS X X

HL X X

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Screw terminal arrangement

Wiring notes:
Note 1: If the same power source is used for the heating stages, install jumper across RC &

RH. Maximum current is 2.0 amps.

Note 2: 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.

Note 3: Humidifier output uses a half bridge rectifier. Reference of the control signal is the

common of the power supply of the Terminal Equipment Controller. (Terminal C)

Note 4: Electromechanical contacts are to be used with the digital inputs. Electronic triacs

cannot be used as mean of switching for the input. The switched leg to the input for
the input to activate is terminal C (common)

Note 5: The transformer of the unit provides power to the t Terminal Equipment Controller

and the additional loads that will be wired to the Terminal Equipment Controller.

HM

AU

DH

DI

HS

Scom

OS

HL

Y2

Y1

G

RC

C

RH

W1

5 pole left top connector

3 pole left top connector

8 pole bottom connector

W2

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TYPICAL APPLICATIONS

9 | PIR Ready VT76x7 Series-Installation Guide

Remote humidity sensor accessories

Model no.

Description

VH2020W1000

Wall mounted humidity sensor

VH2020D10000

Duct mounted humidity sensor

VH2020W1000, remote wall mounted room humidity
sensor.
This sensor can be used for:
 Remote return or room air humidity sensing

with the sensor mounted on the wall.

VH2020W1000

VH2020D1000, remote duct mounted humidity
sensor c/w junction box.
This sensor can be used for:
 Remote return air humidity sensing with the sensor

mounted on the return air duct.

 Supply air humidity sensor used as high limit

protection

VH2020W1000

Wiring example of remote room

humidity sensor:

Wiring example of duct humidity

sensor:

10 | PIR Ready VT76x7 Series-Installation Guide

User menu flow chart:

NOTE: Prompts may not all be present depending on model selected

Sc h e d u l e
s e t ? Y/ N

Sy s mod e
s e t ? Y/ N

Cl o c k
s e t ? Y/ N

T e mp e r a t
s e t ? Y/ N

Sc h e d u l e
h o l d Y / N

Ex i t ?
Y/ N

Un o c c H T
s e t ? Y/ N

° F / ° C
s e t ? Y/ N

He a t i ng
s e t ? Y/ N

Un o c c C L
s e t ? Y/ N

Co o l i n g
s e t ? Y/ N

°C
°F

Temperature Temperature Temperature Temperature

ME NU

1 2 / 2 4 h r s
s e t ? Y/ N

12 / 24

T i me
s e t ? Y/ N

Time

Da y
s e t ? Y/ N

Day

F a n mod e
s e t ? Y/ N

On
Smart
Auto

Sund a y
s e t ? Y/ N

Sa t ur d a y
s e t ? Y/ N

F r i d a y
s e t ? Y/ N

T h u r s da y
s e t ? Y/ N

Wed ne s d a
s e t ? Y/ N

T u e s d a y
s e t ? Y/ N

Mon d a y
s e t ? Y/ N

Ex i t ?
Y/ N

Oc c u p i e d
d a y ? Y/ N

Oc c u p i e d
1 2 : 0 0 p m

Time

Un o c c u p
1 2 : 0 0 p m

Time

Oc c u p i e d
d a y ? Y/ N

Oc c u p i e d
1 2 : 0 0 p m

Time

Un o c c u p
1 2 : 0 0 p m

Time

Oc c u p i e d
d a y ? Y/ N

Oc c u p i e d
1 2 : 0 0 p m

Time

Un o c c u p
1 2 : 0 0 p m

Time

Oc c u p i e d
d a y ? Y/ N

Oc c u p i e d
1 2 : 0 0 p m

Time

Un o c c u p
1 2 : 0 0 p m

Time

Oc c u p i e d
d a y ? Y/ N

Oc c u p i e d
1 2 : 0 0 p m

Time

Un o c c u p
1 2 : 0 0 p m

Time

Oc c u p i e d
d a y ? Y/ N

Oc c u p i e d
1 2 : 0 0 p m

Time

Un o c c u p
1 2 : 0 0 p m

Time

Oc c u p i e d
d a y ? Y/ N

Oc c u p i e d
1 2 : 0 0 p m

Time

Un o c c u p
1 2 : 0 0 p m

Time

Resume
Occ Hold
Uno Hold

Ex i t ?
Y/ N

Off
Heat
Cool
Auto

Ov e r r i d e
s c h d Y/ N

Re s u me
s c h d Y/ N

If status is:
Uno ccupied

If status is:
Tem porary Occupied Tim e,
Occupie d hold or
Uno ccupied hold

Hu mi d i f i
s e t ? Y/ N

De h u mi d i
s e t ? Y/ N

RH% RH%

Hu mi d i t y
s e t ? Y/ N

Ex i t ?
Y/ N

Ex i t ?
Y/ N

On stand-alone
models only

CONFIGURING AND STATUS DISPLAY INSTRUCTIONS

Status display

The Terminal Equipment Controller features a two-line, eight-character display. There is a
low level backlight level that is always active and can only be seen at night.

When left unattended, the Terminal Equipment Controller has an auto scrolling display
that shows the actual status of the system.

Each item is scrolled one by one with the back lighting in low level mode. Pressing any
key will cause the back light to come on to high level.

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.

11 | PIR Ready VT76x7 Series-Installation Guide

Sequence of auto-scroll status display:

ROOM

TEMP & RH

CLOCK

STATUS

SYSTEM

MODE

SCHEDULE

STATUS

OUTDOOR

TEMPERATURE

ALARMS

x.x °C
or °F
XX % RH

Monday
12:00
AM

Sys mode
auto

Occupied

Outdoor
x.x °C or°F

Service

Sys mode
off

Occupied
hold

Frost
ON

Sys mode
heat

Unoccup

SetClock

Sys mode
cool

Filter

Sys mode
emergency

Fan lock

Outdoor air temperature

 Outdoor air temperature display is only enabled when 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 are
automatically disabled.

Alarms

 If alarms are detected, they will automatically be displayed at the end of the status

display scroll.

 During an alarm message display, the back lit screen will light up at the same time as

the message and shut 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 configurable digital
input ( DI1 or DI2 )

Filter

Indicates that the filters are dirty as per one of the configurable digital input (
DI1 or DI2 )

Fan lock

Indicates that the heating and cooling action are locked out due to a defective
fan operation

12 | PIR Ready VT76x7 Series-Installation Guide

Three status LEDs on the Terminal Equipment Controller cover are used to indicate
the status of the fan, a call for heat, or a call for cooling.

When any of the fan is ON, the FAN LED will illuminate

When heating is ON, the HEAT LED will illuminate

When cooling is ON, the COOL LED will illuminate

LED

operation

Heatpump models

VT76xxH

Multistage and single

stage models

VT7600A, VT7652A,

VT7600B & VT7652B

Multistage

economizer models

VT7605B & VT7656B

Fan LED

on

When G Fan terminal

operates

When G Fan terminal

operates

When G Fan terminal

operates

Heating

LED on

When Y1 and / or W1
terminal(s) operate in

heating mode

When W1 terminal

operate in heating

mode

When W1 terminal

operate in heating

mode

Cooling
LED on

When Y1 terminal

operate in cooling

mode

When Y1 terminal

operate in cooling

mode

When Y1 terminal

operate in cooling

mode and or

economizer output is in

function

USER INTERFACE

User configuring instructions menu

The VT76x7 series of Terminal Equipment Controller
feature an intuitive, menu-driven, back-lit LCD display
that walks users through the configuring steps, making
the configuring 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, etc.

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-configuring menu.

If the user pauses at any given time during configuring, Auto Help text is displayed to help
and guide the user through the usage and configuring of the Terminal Equipment
Controller.

Ex.:

Press yes key to change cooling temperature setpoint
Use the up or down arrow to adjust cooling setpoint

13 | PIR Ready VT76x7 Series-Installation Guide

Local keypad interface

Each of the sections in the menu is accessed and configured using 5 keys on the
Terminal Equipment Controller 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. 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 configuring the Terminal Equipment Controller.

The up arrow key is used to increase temperature setpoint and to adjust the
desired values when configuring the Terminal Equipment Controller.

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 Terminal Equipment Controller is left unattended for 45 seconds

Sequence of user menu:

Override

Resume

Temperature

setpoints

Humidity

setpoints

System

mode

setting

Fan

mode

setting

Schedules

setting

Clock

setting

Schedule

hold

Override
schd Y/N

Temperat
Set Y/N

Humidity
Set Y/N

Sys
mode
set
Y/N

Fan
mode
set
Y/N

Schedule
set Y/N

Clock
set
Y/N

Schedule
hold Y/N

Appears
only in
unoccupied
mode

Appears
only on
stand-alone
(Network
Ready)
models

Cancel
ovrd Y/N

Appears
only in
override
mode

14 | PIR Ready VT76x7 Series-Installation Guide

Occupied setpoints adjustments

There is a default profile set in the Terminal Equipment Controller from the factory.
This enables the Terminal Equipment Controller to operate as a non-scheduling unit in

day mode operation at start up.

Default temperature

setpoints:

Default modes:

Occupied cooling setpoint =

24 °C ( 75 °F )

System mode = Auto

Occupied heating setpoint =

22 °C ( 72 °F )

Fan mode = Smart (for models with a communication

module or scheduling network

ready models)

Fan mode = Auto (for non-scheduling network ready

models)

Unoccupied cooling setpoint

= 28 °C ( 82 °F )

Unoccupied heating setpoint

= 18 °C ( 65 °F )

Default schedules:

Fahrenheit scale

Monday through Sunday

Setpoint type = permanent

Occupied time is: 12 00 AM

Unoccupied time is: 11:59 PM

There will be a 1 minute unoccupied period every night at 11:59 PM with this default
configuration.

A) Override an unoccupied period

Override
schd Y/N

This menu will appear only when the Terminal Equipment Controller 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.

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 Terminal Equipment Controller to go into
occupied mode for an amount of time equal to the parameter “TOccTime” (1 to 12 hours).

B) Resume regular scheduling

Cancel
ovrd Y/N

This menu does not appear in regular operation. It will appear only when the Terminal
Equipment Controller is in unoccupied override mode.

Answering “Yes” to this question will cause the Terminal Equipment Controller to resume
the regular setpoints & scheduling.

15 | PIR Ready VT76x7 Series-Installation Guide

C) Temperature setpoints

Permanent setpoint changes

Temperat
set Y/N

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.

Cooling

setpoint

Occupied mode

Heating

setpoint

Occupied mode

Cooling

setpoint

Unoccupied

mode

Heating setpoint

Unoccupied

mode

°F or °C

display setting

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



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

Cooling

70.0 °F

Use ▲▼

To set

value

Heating

68.00 °F

Use ▲▼

To set

value

Unocc CL

80.0 °F

Use ▲▼

To set

value

Unocc HT

60.0 °F

Use ▲▼

To set

value

Units

°F

Use ▲▼

To set

value

Temporary setpoint changes

Temporary setpoints can be modified through the Up arrow key (▲) and the Down arrow

keys (▼).

User will be prompted with the present mode (Heating or Cooling) of the Terminal
Equipment Controller 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.
Local changes to the heating or cooling setpoints made by the user directly using the up

or down arrow are temporary.
They will remain effective for the duration specified by ToccTime.
Setpoints will 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

D) Humidity setpoints

Humidity
set Y/N

This menu permits the adjustment of humidification and dehumidification setpoints.

Dehumidification

setpoint

Humidification

setpoint

Dehumidi

set? Y/N

No next 
Yes down 

Humidifi

set? Y/N

No next 
Yes down 

Use ▲▼ keys to set value, Yes key to confirm

Dehumidi

70 %

Use ▲▼
To set value

Humidifi

50 %

Use ▲▼
To set value

To prevent overlap, a minimum fixed deadband of 5% RH will always prevail between the
humidification and dehumidification setpoints. For example, if the humidification setpoint is

16 | PIR Ready VT76x7 Series-Installation Guide

50% RH and the dehumidification setpoint is changed from 70% RH to 45% RH, the
humidification setpoint will be modified to 45% RH by the Terminal Equipment Controller.

Humidification process

Humidification process will only be allowed when the Terminal Equipment Controller is in
heating mode (System Mode = Heat or System Mode = Auto and effective mode at the
Terminal Equipment Controller is heat). If there is a humidification demand and the fan is
OFF, the fan is first turned ON and the humidifier output is then activated.
Other than having the RH setpoint, the following events can stop the humidification
process at any time: RH sensor is out of range, System Mode is switched to Off or Cool
and the System Mode = Auto but the room’s effective mode changes from Heat to Cool

Dehumidification process

If (Dhu LCK) Dehumidification Lockout Functions is set to On (Enabled):

Dehumidification process will only be allowed when the Terminal Equipment Controller is
in cooling mode (System Mode = Cool or System Mode = Auto and effective mode at the
Terminal Equipment Controller is cool). If there is a dehumidification demand and the fan
is OFF, the fan is first turned ON and the dehumidification output is then activated.

Other than having reach the dehumidification setpoint, the following events can stop the
dehumidification process at any time:

 RH sensor is out of range
 System Mode is switched to Off, Heat or System Mode = Auto and effective

mode at the Terminal Equipment Controller is Heat

 The room temp drops below the cooling setpoint minus the deadband value
 The Outside air temp is below the Dhu OALK parameter

If (Dhu LCK) Dehumidification Lockout Functions is set to Off (Disabled):
Other than having reach the dehumidification setpoint, the following events can stop the

dehumidification process at any time:

 RH sensor is out of range
 System Mode is switched to Off
 The Outside air temp is below the Dhu OALK parameter

Dehumidification process is allowed when the Terminal Equipment Controller operates in
all system modes except Off. If there is a dehumidification demand. If the fan is OFF, the
fan is first turned ON and the dehumidification output is then activated.

There is NO active temperature lockout protection in this mode. If the dehumidification
process causes the room temperature to rise or fall, the Terminal Equipment Controller
will react by either activating the cooling or heating outputs based on its current system
mode settings.

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E) System mode setting

Sys mode
set Y/N

This menu is accessed to set system mode operation

Use ▲▼ to set value, Yes key to confirm

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

F) Fan mode setting

Fan mode
set Y/N

This section of the menu is permits the setting of the fan mode operation.

Use ▲▼ to set value, Yes key to confirm

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 & 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 (Network Ready) scheduling models or if DI1 or DI2 is set to
RemNSB on stand-alone non-scheduling models.

G) Schedule set (2 events)
Scheduling can have 2 or 4 events per day. This is set in the configuration menu as per
parameter (2/4event )

Schedule
set Y/N

This section of the menu permits the user to set the whether 2 or 4 events is needed.
Each day can be tailored to specific schedules if needed.

 2 events can be scheduled per day.
 Occupied & unoccupied periods can be set for each day.

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Monday timer

Schedule set

Tuesday timer

Schedule set

Wednesday timer

Schedule set

Other days are

identical

Monday
set? Y/N

No next 
Yes down



Tuesday
set? Y/N

No next 
Yes down



Wednesda
set? Y/N

No next 
Yes down



Selects the day to be scheduled or
modified

Yes key to access day scheduling, No key to jump to next day

Occupied
Day? Y/N

No next 
Yes down


Occupied
Day? Y/N

No next 
Yes down


Occupied
Day? Y/N

No next 
Yes down


Yes = Daily schedules will be
accessed
No = Unoccupied mode all day

Yes key to access day scheduling, No key to jump to next day

Copy Y/N
Previous

Yes next

No down 

Copy Y/N
Previous

Yes next

No down 

Yes = Will copy previous day
schedule
No = Daily schedules will be
accessed

Yes key to copy previous day, No key to set new time value for each day

Occupied
00:00 AM

Use ▲▼
To set
value

Occupied
00:00 AM

Use ▲▼
To set
value

Occupied
00:00 AM

Use ▲▼
To set
value

Sets Event # 1 Occupied time
Will activate occupied setpoints

Use ▲▼ to set value, Yes key to confirm

Unoccup
00:00 AM

Use ▲▼
To set
value

Unoccup
00:00 AM

Use ▲▼
To set
value

Unoccup
00:00 AM

Use ▲▼
To set
value

Sets Event # 2 Unoccupied time
Will activate unoccupied setpoints

Use ▲▼ to set value, Yes key to confirm

Typical examples of a 2 event office schedule

Ex. #1 Office building closed all weekend

Event

Period #1 - Event #1

Period #1 - Event #2

Occupied

Unoccupied

Setpoint

Cool

Heat

Cool

Heat Daily

72 °F

70 °F

80 °F

62 °F

Occupancy

Monday

7.00 AM

6.00 PM

Day time only

Tuesday

7.00 AM

6.00 PM

Day time only

Wednesday

7.00 AM

6.00 PM

Day time only

Thursday

7.00 AM

6.00 PM

Day time only

Friday

7.00 AM

6.00 PM

Day time only

Saturday

12.00 PM *

12.00 PM *

Unoccupied

Sunday

12.00 PM *

12.00 PM *

Unoccupied

* Scheduling consecutive events to the same time will cause the Terminal Equipment

Controller to choose the last event as the time at which it will set its schedule. In the
above example, the Terminal Equipment Controller will control to the unoccupied set
point until 7:00 AM Monday.

Ex. #2 Commercial building which is occupied all weekend

Event

Period #1 - Event

#1

Period #1 - Event

#2

Occupied

Unoccupied

Setpoint

Cool

Heat

Cool

Heat Daily

72 °F

70 °F

80 °F

62 °F

Occupancy

Monday

8.00 AM

5.00 PM

Day time only

Tuesday

8.00 AM

5.00 PM

Day time only

Wednesday

8.00 AM

5.00 PM

Day time only

Thursday

8.00 AM

5.00 PM

Day time only

Friday

8.00 AM

5.00 PM

Day time only

Saturday

12.00 AM **

11.59 PM **

Occupied

Sunday

12.00 AM **

11.59 PM **

Occupied

Note: 12:00 PM = Noon
12:00 AM = Midnight

19 | PIR Ready VT76x7 Series-Installation Guide

** To schedule a day as occupied for 24 hours, set that day Occupied time to 12:00 AM

and Unoccupied time to 11:59 PM There will be a 1 minute unoccupied period every
night at 11:59 PM with this schedule configuration.

H) Schedule set (4 events)

Schedule
set Y/N

This section of the menu permits the user to set the whether 2 or 4 events is needed. Each
day can be tailored to specific schedules if needed.

 4 events can be scheduled per day.
 Occupied & Unoccupied periods can be set for each day.
 Scheduling the 3 rd. & 4 th. events to the same time will cancel the last period.

Monday timer

Schedule set

Tuesday timer

Schedule set

Wednesday timer

Schedule set

Other days are identical

Monday

set? Y/N

No next 

Yes down



Tuesday
set? Y/N

No next 

Yes down 

Wednesda

set? Y/N

No next 

Yes down



Selects the day to be scheduled or

modified

Yes key to access day scheduling, No key to jump to next day

Occupied
Day? Y/N

No next 

Yes down



Occupied
Day? Y/N

No next 

Yes down 

Occupied

Day? Y/N

No next 

Yes down



Yes = Daily schedules will be

accessed

No = Unoccupied mode all day

Yes key to access day scheduling, No key to jump to next day

Copy Y/N

Previous

Yes next 

No down 

Copy Y/N

Previous

Yes next 

No down 

Yes = Will copy previous day

schedule

No = Daily schedules will be

accessed

Yes key to copy previous day, No key to set new time value for each day

Occupied
00:00 AM

Use ▲▼

To set

value

Occupied
00:00 AM

Use ▲▼

To set value

Occupied

00:00 AM

Use ▲▼

To set

value

Sets Event # 1 Occupied time

Will activate occupied setpoints

Use ▲▼ to set value, Yes key to confirm

Unoccup

00:00 AM

Use ▲▼

To set

value

Unoccup

00:00 AM

Use ▲▼

To set value

Unoccup

00:00 AM

Use ▲▼

To set

value

Sets Event # 2 Unoccupied time

Will activate unoccupied setpoints

Use ▲▼ to set value, Yes key to confirm

Occupie2
00:00 AM

Use ▲▼

To set

value

Occupie2
00:00 AM

Use ▲▼

To set value

Occupie2
00:00 AM

Use ▲▼

To set

value

Sets Event # 3 Occupied time

Will activate occupied setpoints

Use ▲▼ to set value, Yes key to confirm

Unoccup2

00:00 AM

Use ▲▼

To set

value

Unoccup2

00:00 AM

Use ▲▼

To set value

Unoccup2

00:00 AM

Use ▲▼

To set

value

Sets Event # 4 Unoccupied time

Will activate unoccupied setpoints

Use ▲▼ to set value, Yes key to confirm

Ex. #1 Four event retail establishment schedule

Event

Period 1 -

Event 1

Period 1 -

Event 2

Period 2 -

Event 3

Period 2 -

Event 4

Setpoint

Occupied

Unoccupied

Occupied

Unoccupied

Cool

Heat

Cool

Heat

Cool

Heat

Cool

Heat

Daily

72
°F

70

°F

80

°F

62

°F

72

°F

70 °F

80

°F

62 °F

Occupancy

Monday

7.00 AM

5.00 PM

12.00 PM *

12.00 PM *

Day time only

Tuesday

7.00 AM

5.00 PM

12.00 PM *

12.00 PM *

Day time only

Wednesday

7.00 AM

5.00 PM

12.00 PM *

12.00 PM *

Day time only

Thursday

7.00 AM

5.00 PM

7.00 PM

10.30 PM

Day/evening

time only

Friday

7.00 AM

5.00 PM

7.00 PM

10.30 PM

Day/evening

time only

Saturday

12.00 PM *

12.00 PM *

12.00 PM *

12.00 PM *

Unoccupied

Sunday

12.00 PM *

12.00 PM *

12.00 PM *

12.00 PM *

Unoccupied

20 | PIR Ready VT76x7 Series-Installation Guide

* Scheduling events to the same time will cancel the last period and leave the Terminal
Equipment Controller in unoccupied mode

Ex. #2 Residential

Event

Period 1 -

Event 1

Period 1 -

Event 2

Period 2 -

Event 3

Period 2 -

Event 4

Setpoint

Occupied

Unoccupied

Occupied

Unoccupied

Cool

Heat

Cool

Heat

Cool

Heat

Cool

Heat

Daily

72
°F

70

°F

80

°F

62

°F

72

°F

70 °F

80

°F

62 °F

Occupancy

Monday

6:00 AM

8:00 AM

4:00 PM

10:00 PM

Day/evening

time only

Tuesday

6:00 AM

8:00 AM

4:00 PM

10:00 PM

Day/evening

time only

Wednesday

6:00 AM

8:00 AM

4:00 PM

10:00 PM

Day/evening

time only

Thursday

6:00 AM

8:00 AM

4:00 PM

10:00 PM

Day/evening

time only

Friday

6:00 AM

8:00 AM

4:00 PM

11:30 PM

Day/evening

time only

Saturday

8:00 AM *

8:00 AM *

8:00 AM *

11:59 PM *

Day time only

Sunday

12:00 AM *

12:00 AM *

12:00 AM *

11:59 PM *

Occupied all

day

* Scheduling consecutive events to the same time will cause the Terminal Equipment

Controller to choose the last event as the time at which it will set its schedule. In the above
example for Saturday, the Terminal Equipment Controller will control to the occupied set
point from 8:00 AM until 11:59 PM. Since it is desired to be in occupied mode throughout
the night, then it is necessary to schedule the first event on Sunday at 12:00 AM. The
Terminal Equipment Controller will force a one minute unoccupied period for a one minute
period (between 11:59 PM and 12:00 AM on Saturday)

I) Clock/Day Settings

Clock
set Y/N

This section of the menu permits the user to set the time and day.

Time setting

Day setting

Time format setting

Time

set? Y/N

No next 
Yes down 

Day

set? Y/N

No next 
Yes down 

12/24hrs

set? Y/N

No = exit
Yes down 

Time

0:00

Use ▲▼
To set value

Day

Monday

Use ▲▼
To set value

12/24hrs

12 hrs

Use ▲▼
To set value

J) Schedule hold

Schedule
hold Y/N

 This menu will only appear on stand-alone (Network Ready) Terminal

Equipment Controller, i.e. without a BACnet™ / Echelon™ module.

 This section of the menu permits the user to set a permanent schedule

hold, which bypasses the internal Terminal Equipment Controller
scheduling.

 The permanent schedule hold function is typically used for non-

scheduled events that extend for various periods of time.

21 | PIR Ready VT76x7 Series-Installation Guide

 Enabling a permanent occupied or permanent unoccupied schedule hold

will cancel any active override.

 The use of temporary setpoints during permanent hold is permitted. The

duration of the temporary setpoint is as set per the TOccTime parameter.
Ex. 3 hours

Use ▲▼ to set value, Yes key to confirm

Schedule

resume

Resume regular scheduling cancels the permanent hold and re-enables

the regular scheduling as set per internal scheduling or as per remote
NSB via one of the DI’s configured as remote NSB.

This action can also by accomplished by using the Resume menu.
Any temporary setpoint that are active will be left active for the duration of

the period as set per the TOccTime parameter.

Schedule

occ hold

Hold permanent occupied forces the Terminal Equipment Controller into

a permanent occupied mode using the occupied setpoints. All timed
scheduling functions are by-passed.

The PERMANENT OCCUPIED status will appear in the automatic status
scroll. To resume to regular scheduling, user must scroll to the Schedule
Hold menu and select the Schedule resume option..

Schedule

uno hold

Hold permanent unoccupied forces the Terminal Equipment Controller

into a permanent unoccupied mode using the unoccupied setpoints. All
timed scheduling functions are by-passed.

The PERMANENT UNOCCUPIED status will appear in the automatic
status scroll. To resume to regular scheduling, user must scroll to the
Schedule Hold menu and select the Schedule resume option..

INSTALLER CONFIGURATION PARAMETER MENU

 Configuration can be done through the network or locally at the Terminal Equipment

Controller.

 To enter configuration, press and hold the middle button “Menu” for 8 seconds
 If a password lockout is active, “Password” is prompted. Enter password value using the

“up” and “down” arrows and press “Yes” to gain access to all configuration properties of

the Terminal Equipment Controller. A wrong password entered will prevent local access to
the configuration menu.

 Once in the configuration menu, press the “No” button repetitively to scroll between all the

available parameters.

 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.

22 | PIR Ready VT76x7 Series-Installation Guide

CONFIGURATION

PARAMETERS

DEFAULT VALUE

SIGNIFICANCE AND ADJUSTMENTS

PswrdSet

Configuration parameters
menu access password
Default value = 0
No password prompted

This parameter sets a password access 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

Terminal Equipment
Terminal Equipment
Controller networking
address
Default value = 254
Range is: 0 to 254

Conditional parameter to BACnet™ MS-TP models
(VT76xxX5x00B)
Conditional parameter to Wireless models (VT76xxX5x00W)

This parameter will only appear when a BACnet™ or wireless
network adapter is present. If the Terminal Equipment Controller
is installed as a stand-alone (Network Ready) unit or with an
Echelon™ adapter, this parameter will not be used or displayed

-For BACnet™ MS-TP models, the valid range to is from 1 to

127. Default value of 254 disables BACnet™ communication for
the Terminal Equipment Controller.
For wireless models valid range is 0 to 254 with a maximum of
30 Terminal Equipment Controllers per VWG

PAN ID

Personal Area Network
Identification
Default value = 0
Range is: 0 to 1000

Conditional parameter to Wireless models
(VT76xxX5x00W)

This parameter will only appear when a wireless network
adapter is present. If the Terminal Equipment Controller is
installed as a stand-alone (Network Ready) unit or with a
BACnet™ or Echelon™ adapter, this parameter will not be
used or displayed

This parameter (Personal Area Network Identification) is
used to link specific Terminal Equipment Controllers to a
single specific Viconics wireless gateway ( VWG ) For every
Terminal Equipment Controller reporting to a gateway
( maximum of 30 Terminal Equipment Controllers per
gateway ), be sure you set the SAME PAN ID value both at
the gateway and the Terminal Equipment Controller(s).

The default value of 0 is NOT a valid PAN ID.

23 | PIR Ready VT76x7 Series-Installation Guide

Channel

Channel selection
Default value = 10
Range is: 10 to 26

Conditional parameter to Wireless models
(VT76xxX5x00W)

This parameter will only appear when a wireless network
adapter is present. If the Terminal Equipment Controller is
installed as a stand-alone (Network Ready) unit or with a
BACnet™ or Echelon™ adapter, this parameter will not be
used or displayed

This parameter (Channel) is used to link specific Terminal
Equipment Controllers to specific Viconics wireless
gateway(s) (VWG) For every Terminal Equipment Controller
reporting to a gateway (maximum of 30 Terminal Equipment
Controllers per gateway), be sure you set the SAME channel
value both at the gateway and the Terminal Equipment
Controller(s).

Viconics recommends using only the usage of channels
15 and 25 only

The default value of 10 is NOT a valid channel. The valid
range of available channel is from 11 to 26

Get From

Terminal Equipment
Controller Get From
another device
configuration utility
Default value = 0
Range is: 0 to 254

Conditional parameter to Wireless models
VTR73xxX5x00W

Entering a MAC address enables an automatic routine that
automatically fetches all the required configuration properties
of the current device from another already configured device
and copies the same required configured property values.
If a value other than the default value of 255 is entered, user
will then be prompted to exit the Configuration Menu thus
leaving all other parameter configuration to be copied from the
referenced Terminal Equipment Controller MAC address.

Ex.: If you are currently configuring MAC12 and the settings
matches exactly the settings of ZN MAC5, then enter 5 as the
current parameter value.

 If the process is successful and all required configuration

properties have been copied, the value will revert back to
255

 If the process is NOT successful and all required

configuration properties have NOT been copied ( either
the reference device is NOT the same model number or is
offline or does not exists ) the value will revert back to 254
to indicate the failure of the process

Leaving the Get From parameter to 255 means that every
configuration parameters will be set manually.

% RH disp

Local RH Display
Default value = Off

Enables the display of humidity below the room temperature on
the display

On = Display %RH

Off = No display of %RH

24 | PIR Ready VT76x7 Series-Installation Guide

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 Terminal Equipment Controller. 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 Terminal Equipment Controller.
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 & occupied
setpoints for the amount of time set by parameter (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
Terminal Equipment Controller LCD screen when the input is
energized

Service, a back-lit flashing Service alarm will be displayed on the
Terminal Equipment Controller LCD screen when the input is
energized

Fan lock, a back-lit flashing Fan lock alarm will be displayed on
the Terminal Equipment Controller LCD screen when the input is
not energized. Used in conjunction with a local airflow sensor
connected to the input. Locks out the Terminal Equipment
Controller 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

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

25 | PIR Ready VT76x7 Series-Installation Guide

Lockout Keypad lockout levels
Default value = 0 No lock

0 = No lock
1 = Low level
2 = High level

USER KEY FUNCTIONS

LEVEL

Resume/

Override scheduling

Permanent Occupied and

Unoccupied Setpoints

Temporary setpoints using

arrows

System mode setting

Fan mode setting

Schedules setting

Clock setting
Permanent hold

0

1

2

Pwr del

Power-up delay
Default value = 10 seconds

On initial power up of the Terminal Equipment
Controller (each time 24 VAC power supply is
removed & re-applied) there is a delay before any
operation is authorized (fan, cooling or heating). This
can be used to sequence start up multiple units /
Terminal Equipment Controller in one location.

10 to 120 seconds

Frost pr

Frost protection enabled
Default value = Off

Off: no room frost protection
On: room frost protection enabled in all system mode

at: 42 °F ( 5.6 °C )
Frost protection is enabled even in system Off mode

Off or On

On heat pump models the system mode will be
forced to EMERGENCY mode if frost protection is
activated

Heat max
Maximum heating setpoint limit
Default value = 90 °F ( 32 °C )

Maximum occupied & unoccupied heating setpoint
adjustment. Heating setpoint range is:

40 to 90 °F ( 4.5 to 32.0 °C )

Cool min

Minimum cooling setpoint limit
Default value = 54 °F ( 12 °C )

Minimum occupied & unoccupied cooling setpoint
adjustment. Cooling setpoint range is:
54 to 100 °F ( 12.0 to 37.5 °C )

26 | PIR Ready VT76x7 Series-Installation Guide

Pband

Proportional Band
setting
Default value 2 =

2.0 °F ( 0.6 °C )

Adjust the proportional band used by the Terminal Equipment
Controller PI control loop.

Note that the default value of 2.0 °F ( 1.1 °C ) gives
satisfactory operation in most normal installation cases. The use of
a superior proportional band different than the factory one is
normally warranted in applications where the Terminal Equipment
Controller location is problematic and leads to unwanted cycling of
the unit. A typical example is a wall mounted unit where the
Terminal Equipment Controller is installed between the return and
supply air feeds and is directly influenced by the supply air stream of
the unit.

Value

F scale Pband

C scale Pband

2

2 F

1.1 C

3

3 F

1.7 C

4

4 F

2.2 C

5

5 F

2.8 C

6

6 F

3.3 C

7

7 F

3.9 C

8

8 F

4.4 C

Anticycle
Minimum on/off
operation time for
stages
Default value = 2

minutes

Minimum On/Off operation time of cooling & heating stages.

IMPORTANT, anti-short cycling can be set to 0 minutes for
equipment that posses their own anti cycling timer. Do not use this
value unless the equipment is equipped with such internal timer.
Failure to do so can damage the equipment.

0, 1, 2, 3, 4 & 5 minutes

Anti-short cycling can be set to 0 minutes for equipment that posses
their own anti cycling timer. Do not use that value unless the
equipment is equipped with such internal timer. Failure to do so can
damage the equipment.

27 | PIR Ready VT76x7 Series-Installation Guide

Heat cph
Heating stages cycles
per hour
Default value = 4

C.P.H.

Will set the maximum number of heating stage cycles per hour
under normal control operation. It represents the maximum number
of cycles that the equipment will turn ON and OFF in one hour.
Note that a higher C.P.H will represent a higher accuracy of control
at the expense of wearing mechanical components faster.

3, 4, 5, 6,7 & 8 C.P.H.

For multi stage models, heat cph applies to W1 & W2

For heat pump models, heat cph applies to W1 only
(Emergency heat )

Cool cph

Cooling stages cycles
per hour
Default value = 4 C.P.H.

Will set the maximum number of cooling stage cycles per hour under
normal control operation. It represents the maximum number of cycles
that the equipment will turned on and off in one hour.
Note that a higher C.P.H will represent a higher accuracy of control at
the expense of wearing mechanical components faster.

3 or 4 C.P.H.

For multi stage models, cool cph applies to Y1 & Y2
For heat pump models, cool cph applies to Y1 & Y2 in cooling and
heating independently of the reversing valve position

Minimum deadband
Default value = 2.0 °F (

1.1 °C )

Minimum deadband value between the heating and cooling
setpoints. If modified, it will be applied only when any of the
setpoints are modified.

2, 3 or 4 °F ( 1.0 to 2.0 °C )

Fan cont

Default value = On

Fan control in heating mode.
When selecting On; the Terminal Equipment Controller in all cases
will always control the fan (terminal G).
Valid for On or Auto fan mode
When selecting Off; the fan (terminal G), when heating stages
(terminals W1 & W2) are solicited, will not be energized. The fan in
this case will be controlled by the equipment fan limit control.
Valid only for Auto fan mode. On fan mode will leave the fan always
on.

On or Off

For multi stage models, fan control applies to W1 & W2

For heat pump models, fan control applies to W1 only
(Emergency heat)

Fan del

Default value = Off

Fan delay extends fan operation by 60 seconds after the call for
heating or cooling ends.
Valid only for Auto fan mode. “On” fan mode will leave the fan
always on.

Off or On

28 | PIR Ready VT76x7 Series-Installation Guide

TOccTime
Default value = 3
hours

Temporary occupancy time with occupied mode setpoints when
override function is enabled
When the Terminal Equipment Controller is in unoccupied mode,
function is enabled with either the menu or DI1 or DI2 configured as
remote override input.

0,1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 & 12 hours

Cal RS

Room air temperature
sensor calibration
Default value = 0.0 °F
or °C

Offset that can be added/subtracted to actual displayed room
temperature

± 5.0 °F ( ± 2.5 °C )

Cal OS

Outside air
temperature sensor
calibration
Default value = 0.0 °F
or °C

Offset that can be added/subtracted to actual displayed outside air
temperature

± 5.0 °F ( ± 2.5 °C )

H stage

Number of heating
stages. Applicable to 2
stage models only
Default value = 2

stages

Will revert the operation of 2 stages Terminal Equipment Controller
to single stage operation only when the second heating step is not
needed.

1 or 2 stages

For heat pump models, H stage is limited to 1 stage only (W1 –
Aux. Heat)

29 | PIR Ready VT76x7 Series-Installation Guide

C stage

Number of cooling stages
2 stages model only
Default value = 2 stages

Will revert the operation of 2 stage Terminal Equipment
Controller to single stage operation only when the second
cooling step is not needed.

1 or 2 stages

For heat pump models, HP stage selects the number of
compressor stages

H lock

Outside air temperature
heating lockout
Default value = 120 °F (
49 °C )

Disables heating stage operation based on outdoor air
temperature.
Function will only be enabled if OS ( outside air temperature
sensor ) is connected.

From -15 °F up to 120 °F ( -26 °C up to 49 °C )

C lock

Outside air temperature
mechanical cooling
lockout.
Default value = -40 °F ( -
40 °C )

Disables cooling stage operation based on outdoor air
temperature.
On economizer model, free cooling will not be disabled by this
function.
Function will only be enabled if OS ( outside air temperature
sensor ) is connected.

From -40 °F up to 95 °F ( -40 °C up to 35 °C )

Unocc TM

Unoccupied Timer value
Default 0.5 hours

Time delay between the moment where the Terminal
Equipment Controller toggles from occupied to unoccupied
after the last movement has been detected by the PIR.

Range is: 0.5 to 24.0 hours in 0.5 hour increments

2/4event

Number of events
configuration

Default value = 2 event

2 events, will set up scheduling for the following
Event 1 is for Occupied setpoints
Event 2 is for Unoccupied setpoints
4 events, will set up scheduling for the following
Event 1 is for Occupied setpoints
Event 2 is for Unoccupied setpoints
Event 3 is for Occupied setpoints
Event 4 is for Unoccupied setpoints

30 | PIR Ready VT76x7 Series-Installation Guide

RH LT

Reset RH lower outside
temperature setpoint
Default value = -20°F
(-29°C)

Minimum outside air temperature for RH setpoint reset.
Only valid if an outdoor air sensor is connected at the
Terminal Equipment Controller or a network value is
transmitted to the Terminal Equipment Controller. See RH HT
& RE Sp.

From –40°F up to 15°F (-40°C to –9.5°C)

Aux cont

Auxiliary contact
configuration

Default value = N.O.
normally open

This contact can be used to energize peripheral devices such
as: lighting equipment, exhaust fans, economizers, etc.
This contact will operate in parallel with the internal
occupied/unoccupied schedule of the Terminal Equipment
Controller or the remote NSB contact if DI1 or DI2 is used.
When the system is in OFF mode, the contact will remain in
its unoccupied status independently of the occupied /
unoccupied schedule.

Configured

Contact

occupied status

Contact

unoccupied status

N.O.

Closed

Opened

N.C.

opened

Closed

Prog rec

Progressive recovery
enabled

Default value = Off
Progressive recovery is

automatically disabled if DI
1 and / or DI 2 are
configured remote NSB

For scheduling model
only - VT7657B1000B

Off, = no progressive recovery

The occupied schedule time is the time at which the system
will restart.

On, = progressive recovery active.
The occupied schedule time is the time at which the desired
occupied temperature will be attained. The Terminal
Equipment Controller will automatically optimize the
equipment start time.

In any case, the latest a system will restart is 10 minutes prior
to the occupied period time.

31 | PIR Ready VT76x7 Series-Installation Guide

RH HT

Reset RH higher outside
temperature setpoint
Default value = 32°F
(0°C)

Maximum outdoor air temperature for RH setpoint reset.
Only valid if an outdoor air sensor is connected at the Terminal
Equipment Controller or a network value is transmitted to the
Terminal Equipment Controller. See RH LT & RE Sp

From 20°F up to 55°F (-6.5°C to 13°C)

HL SP

RH High limit setpoint
Default value = 85% RH

High humidity limit in the supply.
Only valid if a 0-10 VDC sensor is connected at the Terminal
Equipment Controller – otherwise this feature is disabled
automatically.

From 50% RH up to 90% RH

Dhu OALK

Dehumidification outside
air temperature lockout
Default value = 32°F
(0°C)

Outside air temperature under which the dehumidification
sequence is disabled.
Only valid if an outdoor air sensor is connected at the Terminal
Equipment Controller or a network value is transmitted to the
Terminal Equipment Controller.

From –40°F up to 122°F (-40°C to 50°C)

Dhu LCK

Dehumidification Lockout
Functions
Default value = On

Enables or disables the lockout functions for the
dehumidification control process of the output.
On: will restrict the dehumidification process based on the
following:

- System mode = Needs to be Cool or Auto ( currently
operating in cooling only )

- Low ambient room temperature protection enabled

Off: will not restrict the dehumidification process:

- System mode = Needs to be Cool, Heat or Auto

- There is no ambient room temperature protection
enabled

DehuHyst

Dehumidification
Hysteresis
Default value = 5% RH

Dehumidification control hysteresis
Used only if dehumidification sequence is enabled.
From 2% RH up to 20% RH

32 | PIR Ready VT76x7 Series-Installation Guide

RE SP

Reset humidity
setpoint
Default value =
20% RH

The RH setpoint will be reset from the user setpoint to this value
when the RH LT outside air temperature value is reached.
Only valid if an outdoor air sensor is connected at the Terminal
Equipment Controller or a network value is transmitted to the
Terminal Equipment Controller. See RH LT & RE HT.

From 10% RH up to 90% RH

RH cal

Humidity sensor
calibration
Default value = 0
%RH

Offset that can be added/subtracted to actual displayed humidity by ±

15.0 %RH.
This calibration applies to the internal humidity sensor if no remote
humidity sensor is connected. This calibration applies to the remote
humidity sensor when one is connected.

From –15% RH up to 15% RH

Display HL

Display the high
limit sensor value

Used as diagnostic / service help to troubleshoot and diagnose
sensor / humidifier operation

Note:

When the outside air sensor is not connected or is shorted, the Terminal Equipment
Controller bypasses:

 The heating lockout
 The cooling lockout
 The dehumidification lockout
 The humidity setpoint reset

TROUBLESHOOTING GUIDE

Symptom

Possible Cause

Corrective Action

No display on the

Terminal Equipment

Controller

Absent or

incorrect supply

voltage

1. Check power supply voltage between
C & RC to be from 19-30 VAC

2. Check for tripped fuse or circuit
breaker

Overloaded

power

transformer

Verify that the transformer used is

powerful enough (enough VA’s) to supply

all controlled devices including the

Terminal Equipment Controller

Keyboard menu does not

access all functions

Keyboard locked

Change configuration parameter

LOCKOUT to value “0” to access all

levels of the menu

Temperature setpoints

revert to original value

after a certain time period

Temporary

setpoint option

selected

1. The Terminal Equipment Controller
needs to be in Permanent setpoint

mode for the new setpoint to be kept

and memory and used all the time

2. Go to the Set temperature menu.

3. The last prompt is setpoint type. Set it
to Permanent setpoint

33 | PIR Ready VT76x7 Series-Installation Guide

Terminal

Equipment

Controller will not

call for heating

Wrong mode selected

Select heating mode

Terminal Equipment

Controller in

Unoccupied mode

Select Occupied Hold in Schedule hold or

Override to force the Terminal Equipment

Controller Occupied heating setpoint

Anti-cycle delay active

Wait, the anti-cycling period will end and

the equipment will start

Heating setpoint is

satisfied

Raise the Heating setpoint

Heating lockout

attained

1. Mode is locked out based on outside air
temperature

2. Change configuration parameter H Lock

to value 120 °F ( 49 °C ) to by-pass

lockout

Wiring error

1. Start the Fan by forcing the Fan ON
mode

2. Put a jumper across terminals RH &

W1. The heating should come ON. If it

does not, verify wiring and check if a

jumper is required between RC & RH

Terminal

Equipment

Controller will not

call for cooling

Wrong mode selected

Select cooling mode

Terminal Equipment

Controller in

Unoccupied mode

Select Occupied Hold in Schedule hold or

Override to force the Terminal Equipment

Controller Occupied cooling setpoint

Anti-cycle delay active

Wait, the anti-cycling period will end and

the equipment will start

Cooling setpoint is

satisfied

Lower the cooling setpoint

Cooling lockout

attained

1. Mode is locked out based on outside air
temperature

2. Change configuration parameter C Lock

to value -40 °F ( -40 °C ) to by-pass

lockout

Wiring error

1. Start the Fan by forcing the Fan ON
mode

2. Put a jumper across terminals RC & Y1.
The cooling should come ON. If it does

not, verify wiring

The Terminal

Equipment

Controller will not

turn on the fan

Wrong mode selected

1. Start the Fan by forcing the Fan ON
mode

2. Put a jumper across terminals RC & G.
The fan should come ON. If it does not,

verify wiring

Wiring error

Digital display
shows missing
digits or erratic

segments

Defective display

Replace Terminal Equipment Controller

34 | PIR Ready VT76x7 Series-Installation Guide

HUMIDITY CONTROL

Humidity reset

Humidity setpoint reset by outside air temperature

If an outdoor air sensor is
connected at the Terminal
Equipment Controller or a value
is received from the network, it
can be used to reset the
humidity setpoint during the cold
season to minimize
condensation on windows and
building structures.

When the outdoor temperature
falls below the selected high
temperature, parameter RH HT
(32F in the example Figure 8),
the humidity setpoint will start to
decrease. The lowest humidity
setpoint will be reached at
selected low temperature,
parameter RH LT (-20F).

The setpoint decrease from original setpoint to the lowest setpoint determined by the
parameter RE Sp. In the example, Figure 8, RE Sp was set to 20%, therefore the
humidity setpoint dropped from 45% to 20%.

If you don’t want to use this feature, set the RE Sp parameter to 90% RH.

High limit humidity sensor

The VT76x7 series
includes a high limit
sequence. This allows the
use of a remote 0 to 10
VDC humidity sensor to
limit the humidity in the
supply air. If no sensor is
detected at the HL
connector, this sequence
is disabled at the
Terminal Equipment
Controller.

Note: this high limit
function is not a safety
device. For critical
situations, provide
installation with normal
protections required to
ensure a safe operation.

20%

25%

30%

35%

40%

-40°F

-20°F 0°F 20°F 40°F

45%

%RH Setpoint

Outside Air Temp.

RH HT = 32°F

RH LT = -20°F

RH Set = 45%

RE Sp = 20%

Fig.11 – Humidity setpoint reset by outside air

Fig.12 – High humidity limit vs. Control output level curve

Maximum Supply Humidity

100

%

0

%

50

%

Control

Output

Level

85

%

35 | PIR Ready VT76x7 Series-Installation Guide

SPECIFICATIONS

Terminal Equipment Controller power
requirements:

Operating conditions:
Storage conditions:
Temperature sensor:

Resolution:
Control accuracy:

Humidification setpoint:
Dehumidification setpoint:
Contact output rating:

Humidification analog output rating:
Humidification analog output accuracy

Occ, Stand-By and Unocc cooling setpoint range:
Occ, Stand-By and Unocc heating setpoint range:
Room and outdoor air temperature display range:
Proportional band for room temperature control:

Digital inputs:
Analog high limit & remote humidity inputs:
Wire gauge:

Approximate shipping weight:
Agency Approvals all models:

Agency Approvals all models:

Agency Approvals Wireless models:

19-30 VAC 50 or 60 Hz; 2 VA Class 2
RC to RH jumper 2.0 Amps 48 VA
maximum
0 °C to 50 °C ( 32 °F to 122 °F )
0% to 95% R.H. non-condensing

-30 °C to 50 °C ( -22 °F to 122 °F )
0% to 95% R.H. non-condensing
Local 10 K NTC thermistor
± 0.1 °C ( ± 0.2 °F )
Humidity ± 0.1%
± 0.5 ° C ( ± 0.9 °F ) @ 21 °C ( 70 °F )
typical calibrated
±5% RH from 20 to 0% RH at 50 to
90° F (10 to 32 °C)
10% RH to 90% RH
15% RH to 95% RH
Relay output: 30 VAC, 1 Amp.
Maximum, 3 Amp. In-rush.
Analog: 0 to10VDC into 2KΩ
resistance min.
± 3% typical

12.0 to 37.5 °C ( 54 to 100 °F )

4.5 °C to 32 °C ( 40 °F to 90 °F )

-40 °C to 50 °C ( -40 °F to 122 °F )
Factory set, Cooling & Heating: 1.1°C
( 2°F )
Relay dry contact only across C
terminal to D1
Analog: 0 to10VDC into 2KΩ
resistance min.
18 gauge maximum, 22 gauge

0.75 lb ( 0.34 kg )
UL: UL 873 (US) and CSA C22.2 No.
24 (Canada), File E27734 with CCN
XAPX (US) and XAPX7 (Canada)

Industry Canada: ICES-003 (Canada)
FCC: Compliant to CFR 47, Part 15,

Subpart B, Class A (US)
CE : EMC Directive 89/336/EEC
(Europe Union)
C-Tick: AS/NZS CISPR 22 Compliant
(Australia / New Zealand) Supplier
Code Number N10696
FCC: Compliant to: Part 15, Subpart C

THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT
TO THE FOLLOWING TWO CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE HARMFUL
INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED,

INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION

Please check with your local government for instruction on disposal of this product

36 | PIR Ready VT76x7 Series-Installation Guide

DRAWING & DIMENSIONS

Viconics Technologies Inc.

Tel.: Fax: Toll free:

www.viconics.com