Viconics VT76 7 Series User manual

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CONTENTS
Installation 2
Location 2
Installation 2
Terminal, Identification and Function 3
Wiring 3
Screw terminal arrangement 4
Typical applications 5
Remote humidity sensor accessories 6
Configuring and Status Display Instructions 8
Status display 8
User Interface 10
10
User configuring instructions menu 10
10
Local keypad interface 11
Troubleshooting guide 12
VT76x7 Series
Installation Guide
For Commercial HVAC Applications
November 2015
April 26, 2011 / 028-0190-R6
May 5, 2011 / 028-0228-R3

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INSTALLATION
Remove security screw on bottom of cover.
Open unit by pulling on bottom side
of Room Controller (fig. 1).
Remove wiring terminals from
sticker.
Read FCC ID and IC label installed
in cover.
Location
1. Should not be installed on outside
wall.
2. Must be installed away from any
direct heat source.
3. Should not be installed near air
discharge grill.
4. Should not be affected by direct
sun radiation.
5. Nothing should restrict vertical air
circulation to the Room Controller.
Installation
1. Swing open Room Controller PCB
to left by pressing PCB locking tabs
(fig. 2).
2. Pull out cables 6” out from wall.
Ensure wall surface is flat and
clean.
3. Insert cable in central hole of base.
4. Align base and mark location of two
mounting holes on wall ensuring
proper side of base up.
5. Install anchors in wall.
6. Insert screws in mounting holes on
each side of base (fig. 2).
7. Gently swing back circuit board on
base and push until tabs lock.
8. Strip each wire 1/4 inch from end.
9. Insert each wire according to wiring
diagram.
10. Gently push excess wiring back into
hole (fig. 3).
11. Re-Install wiring terminals in correct
locations (fig. 3).
12. Re-install cover (top side first) and
gently push extra wire length back
into hole in wall.
13. Install security screw.

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TERMINAL,IDENTIFICATION AND FUNCTION
Wiring
If replacing an existing Room Controller, label the wires before removal
of the Room Controller.
Electronic controls are static sensitive devices. Discharge yourself
properly before manipulating and installing the Room Controller.
A short circuit or wrong wiring may permanently damage the Room
Controller or the equipment.
All VT7000 series Room 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.
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 Room 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 Room Controller and the
additional loads that will be wired to the Room 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

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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:

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User menu flow chart:
NOTE: Prompts may not all be present depending on model selected
S c h e d u l e
s e t ? Y/ N
S y s mod e
s e t ? Y/ N Cl o c k
s e t ? Y/ N
T e mpe 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 HT
s e t ? Y/ N ° F / ° C
s e t ? Y/ N
He a t i n g
s e t ? Y/ N Un o c c CL
s e t ? Y/ N
Co o l i n g
s e t ? Y/ N
°C
°F
Temperature Temperature Temperature Temperature
MENU
1 2 / 2 4 hr 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
S u n d a y
s e t ? Y/ N S a t u r da y
s e t ? Y/ N F r i d a y
s e t ? Y/ N T h u r s d a y
s e t ? Y/ N We d n e s d a
s e t ? Y/ N T u e s d a y
s e t ? Y/ N Mo n d a y
s e t ? Y/ N
Ex i t ?
Y/ N
Oc c u pi e d
d a y ? Y/ N
Oc c u pi 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 pi e d
d a y ? Y/ N
Oc c u pi 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 pi e d
d a y ? Y/ N
Oc c u pi 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 pi e d
d a y ? Y/ N
Oc c u pi 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 pi e d
d a y ? Y/ N
Oc c u pi 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 pi e d
d a y ? Y/ N
Oc c u pi 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 pi e d
d a y ? Y/ N
Oc c u pi 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:
Unoccupied
If status is:
Temporary Occupied Time,
Occupied hold or
Unoccupied 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

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CONFIGURING AND STATUS DISPLAY INSTRUCTIONS
Status display
The Room 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 Room 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.
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 an opened
sensor or a sensor not connected. Associated functions, such as mode lockouts are
automatically disabled.

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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
Three status LEDs on the Room 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

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USER INTERFACE
User configuring instructions menu
The VT76x7 series of Room 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 Room Controller.
Ex.:
Press yes key to change cooling temperature setpoint
Use the up or down arrow to adjust cooling setpoint

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Local keypad interface
Each of the sections in the menu is accessed and configured using 5 keys on the Room
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 Room Controller.
The up arrow key is used to increase temperature setpoint and to adjust the
desired values when configuring the Room 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 Room 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

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TROUBLESHOOTING GUIDE
Symptom
Possible
Cause
Corrective Action
No display on the Room
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 Room 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 Room 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

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Room Controller
will not call for
heating
Wrong mode selected
Select heating mode
Room Controller in
Unoccupied mode
Select Occupied Hold in Schedule hold
or Override to force the Room 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
Room Controller
will not call for
cooling
Wrong mode selected
Select cooling mode
Room Controller in
Unoccupied mode
Select Occupied Hold in Schedule hold
or Override to force the Room 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 Room
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 Room Controller

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Viconics Technologies Inc.
Tel.: Fax: Toll free:
www.viconics.com