Viconics VT7606E Installation Guide

VT7600E Series

RTU Terminal Equipment Controller with IAQ

Control

Installation Guide

For Commercial HVAC Applications

February 25th, 2014 / 028-0363-02

Contents

Installation 2

Location 2

Installation 2

Theory of Operation 4

Features overview 4

Model Chart 5

Network ready 5

Terminal, Identication and Function 6

Screw terminal arrangement and wiring 6

Typical applications 7

Main outputs wiring 7

Remote sensor accessories 8

Conguring and Status Display Instructions 9

Status display 9

User interface 11

User conguring instructions menu 11

Local keypad interface 11

Fresh Air Damper Control Sequences 29

Economizer Control Mode Only 29

Economizer Mode and Fresh Air Measurement Station 30

Economizer Mode and CO2 Level Control 31

Economizer Mode, CO2 Level Control and Fresh Air Measurement Station 32

Specications 33

Drawing & Dimensions 34

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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 at 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.

Fig. 1

Location of PCB retaining tabs

Fig. 2

Re-install terminal blocks

Fig. 3

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10. Insert each wire according to wiring diagram.

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 rst) and gently push extra wire length back into the
hole in the wall.

14. Install security screw.

• 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 verication prior to
shipping to ensure proper and reliable operation in the eld. 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, ow 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.

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Theory of operaTion

The VT76X6E series uses a Viconics proprietary adaptive logic algorithm to control the
space temperature. This algorithm controls the heating or 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.

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

Features overview

• 7 day schedule models, 2 or 4 events.

• C02 control logic based on fresh air volume or fresh air damper position.

• Fresh air damper output for building CO2 level control.

• Gas, oil or electric system compatibility.

• Remote outdoor sensing capability for added exibility.

- System mode heating and cooling lockout.

• Remote discharge air sensor input for monitoring and control purpose.

- System efciency feedback.

- Discharge high limit heating lockout.

- Discharge low limit cooling lockout.

• Remote return air sensor input that replaces internal on board sensor.

- System efciency feedback.

• Password protected conguration menu and lockable keypads for security.

• Automatic smart fan operation saves energy during unoccupied periods.

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

• Congurable 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.

Easy conguration and self-binding operation

• Easy conguration without using any special software or additional tools.

• Can be used as stand-alone or with BACnet™ MS-TP supervision controller for
monitoring purposed.

• Truly scalable in terms of supported number of zones and RTU units.

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Model CharT

Product Selector

Please refer to the following matrix when ordering

Example:

VT765 6 E 5500W

Wireless communication
Factory installed PIR cover
IAQ Control
With Economizer
Local Scheduling

Please note, not all combinations and variants are available. Refer to the Vicon­ics price list for a complete selection listing of all available models.

Network ready

• All Viconics VT7600 series Terminal Equipment Controllers are designed for stand­alone (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

eld retrotted with the following communication adapters:

○ VCM7600N5000B, Terminal Equipment Controller BACnet™ MS-TP® commu-

nication adapter.

○ VCM7600N5000W Terminal Equipment Controller wireless Zigbee™ communi-

cation adapter.

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TerMinal, idenTifiCaTion and funCTion

Terminal Use

1 – Cool 2 Y2 Output for cooling / compressor stage number 2.

2 – Cool 1 Y1 Output for cooling / compressor stage number 1.

3 - Fan G Output for the fan.

4 - 24 V ~ Hot RC

5 - 0 V ~ Com C

6 – Heat Switch
Leg

7 – Heat 1 W1 Output for heating stage number 1.

8 – Heat 2 W2 Output for heating stage number 2.

9 – Economizer
Output

10 – Analog
Heat Output

11 – RS RS

12 – MS MS Discharge air temperature sensor input

13 – AI1 AI1 0-10 VDC analog input for CO2 transmitter

14 – Scom Scom Reference input for AI, RS, OS and DS

15 – OS OS Outside air temperature sensor input

16 –AI2 AI2 0-10 VDC analog input for airow transmitter

Terminal

Identication

Power supply of controller, hot side (Delivered from the
RTU).

Power supply of controller, common side. Also used
as reference for the analog BPD output when used
(Delivered from the RTU).

24 VAC switched leg for the heating stages.

• If heating stages are part or RTU, install a jumper

RH

EC 0-10 VDC analog fresh air damper / economizer output.

AO 0-10 VDC analog heating output.

across RC & RH.

• If heating stages are part of separate equip­ment with a different power supply, feed external
switched power leg through RH without installing a
jumper across RC & RH.

Return air temperature sensor input. Used when com­munication is lost. If remote sensor fails, thermostat will
use its on-board sensor to control.

Description

Screw terminal arrangement and wiring

Controller terminals:

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typIcal applIcatIons

Main outputs wiring

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: Economizer and all analog outputs and inputs use a half bridge

rectier. Reference of the control signal is the common of the

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

Note 3: 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 4: The transformer of the unit provides power to the Terminal Equip-

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

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Remote sensor accessories

Model no. Description

S2020E1000

S2060A1000

S2000D1000 Duct mounted temperature sensor

Remote mount temperature sensors use 10K type 2 NTC thermistors.

Temperature vs. resistance chart for 10 Kohm NTC thermistor

ºC ºF Kohm ºC ºF Kohm ºC ºF Kohm ºC ºF Kohm ºC ºF Kohm

-40 -40 324.3197 -20 -4 94.5149 0 32 32.1910 20 68 12.4601 40 104 5.3467

-39 -38 303.6427 -19 -2 89.2521 1 34 30.6120 21 70 11.9177 41 106 5.1373

-38 -36 284.4189 -18 0 84.3147 2 36 29.1197 22 72 11.4018 42 108 4.9373

-37 -35 266.5373 -17 1 79.6808 3 37 27.7088 23 73 10.9112 43 109 4.7460

-36 -33 249.8958 -16 3 75.3299 4 39 26.3744 24 75 10.4443 44 111 4.5631

-35 -31 234.4009 -15 5 71.2430 5 41 25.1119 25 77 10.0000 45 113 4.3881

-34 -29 219.9666 -14 7 67.4028 6 43 23.9172 26 79 9.5754 46 11 5 4.2208

-33 -27 206.5140 -13 9 63.7928 7 45 22.7861 27 81 9.1711 47 117 4.0607

-32 -26 193.9703 -12 10 60.3980 8 46 21.7151 28 82 8.7860 48 118 3.9074

-31 -24 182.2686 -11 12 57.2044 9 48 20.7004 29 84 8.4190 49 120 3.7607

-30 -22 171.3474 -10 14 54.1988 10 50 19.7390 30 86 8.0694 50 122 3.6202

-29 -20 161.1499 -9 16 51.3692 11 52 18.8277 31 88 7.7360 51 124 3.4857

-28 -18 151.6239 -8 18 48.7042 12 54 17.9636 32 90 7.4182 52 126 3.3568

-27 -17 142.7211 -7 19 46.1933 13 55 17.1440 33 91 7.1150 53 127 3.2333

-26 -15 134.3971 -6 21 43.8268 14 57 16.3665 34 93 6.8259 54 129 3.1150

-25 -13 126.6109 -5 23 41.5956 15 59 15.6286 35 95 6.5499 55 131 3.0016

-24 - 11 119.3244 -4 25 39.4921 16 61 14.9280 36 97 6.2866 56 133 2.8928

-23 -9 112.5028 -3 27 37.5056 17 63 14.2629 37 99 6.0351 57 135 2.7886

-22 -8 106.1135 -2 28 35.6316 18 64 13.6310 38 100 5.7950 58 136 2.6886

-21 -6 100.1268 -1 30 33.8622 19 66 13.0307 39 102 5.5657 59 138 2.5926

Outdoor temperature sensor

Averaging temperature sensor

(R25°C = 10KΩ±3% - B25/85°C = 3975K±1.5%)

S2000D1000; remote duct mounted temperature sensor c/w junction box.

This sensor can be used for:

• Remote return air temperature
sensing with the sensor mounted on
the return air duct.

• Outside air temperature sensing with
the sensor installed in the fresh air
plenum.

• Supply air temperature sensing.

Fig.10 – Remote Duct Mounted Temperature Sensor

S2060A1000; remote averaging duct mounted temperature sensor c/w junction box.

This sensor can be used for:

• Remote averaging return air temperature sensing with the sensor mounted on
the return air duct.

• Outside air temperature averaging sensing with the sensor installed in the fresh
air plenum.

• Supply air temperature averaging sensor for economizer models with the sensor
in the mixing plenum.

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S2020E1000; outdoor air temperature sensor

This sensor can be used for:

• Outside air temperature sensing with the sensor installed directly exposed to the
elements.

• Sensor uses a water resistant NEMA 4 ABS enclosure for outdoor applications.

WIRING S2000D1000, S2060A1000 and S2020E1000

Remote wiring 1 sensor Remote wiring 4 sensors

confIguratIon and status dIsplay InstructIons

Status display

The Terminal Equipment Controller features a two-line, eight-character display. There
is a low 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 current status of the system.

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

Manual scrolling 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.

Sequence of auto-scroll status display:

CLOCK

STATUS

Monday

12:00 AM

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SYSTEM

MODE

Sys mode

auto

Sys mode

off

Sys mode

heat

Sys mode

cool

SCHEDULE

STATUS

Occupied

Occupied Hold SetClock

Unoccup DAS alarm

OUTDOOR

TEMPERATURE

Outdoor

x.x °C or °F

ALARMS

Frost ON

FA alarm

High CO

2

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
and economizer function 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:

Sequence of manual-scroll status display:

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.

Clock Status System

Mode

Monday

12:00 AM

Sys Mode

Off

Sys Mode

Schedule

Status

Outdoor

Temperature

Occupied Outdoor

xx.x °C or °F

Unoccupied SetClock

Auto

Sys Mode

Override DAS Alarm

Cool

Sys Mode

Heat

Frost ON

SetClock

DAS Alarm

Indicates that the heating is energized by the low limit frost protec­tion room temperature setpoint 5.6 °C (42 °F).

Indicates that the clock needs to be reset. There has been a power
failure which has lasted longer than 6 hours.

Indicates that the discharge air temperature is either too low or too
high.

FA Alarm Indicates that the Fresh Air Level is either too low or too high.

High CO2

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Indicates that the CO2 Level value is higher than the Max CO2
parameter value.

Alarms

(if detected)

Frost ON

FA Alarm

High CO2

user inTerfaCe

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

When heating & reheat is ON, the HEAT LED will illuminate

When cooling is ON, the COOL LED will illuminate

User conguring instructions menu

The VT76X6E series of controllers feature an intuitive,
menu-driven, back-lit LCD display that walks users

and installers through the conguring steps, making
the conguring process extremely simple. This menu

is typically accessed by the user to set the parameters
such as the clock time set, the schedule time events
and the system mode.

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-conguring menu.

If the user pauses at any given time during conguring, Auto Help text is displayed to
help and guide the user through the usage and conguring of the controller.

Press yes key to change cooling temperature setpoint

Ex.:

Use the up or down arrow to adjust cooling setpoint

Local keypad interface

Each of the sections in the menu is accessed and congured using 5 keys on the

Terminal Equipment Controller cover.

The priority for the alarms is as follows:

The YES key is used to conrm 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 conguring the Terminal Equipment Controller.

The up arrow key is used to increase temperature setpoint and to adjust the

desired values when conguring the Terminal Equipment Controller.

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