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PIR Ready VT76X7 Series 

Programmable & Non-Programmable Thermostats 

With Humidification & Dehumidification Strategy 

For Commercial HVAC Applications 

September 1, 2010

 

Product overview 

 

 

 

The VT76x7 PI thermostat family is specifically designed for single stage 
and multi-stage control of heating/cooling equipment such as rooftop and 
self-contained units with humidifier and/or dehumidifier. The product 
features an embedded complete humidity solution with an intuitive, menu-
driven, backlit LCD display that walks users through the programming 
steps, making the process extremely simple. Accurate temperature & 
relative humidity control is achieved due to the product’s PI time 
proportional control algorithm, which virtually eliminates temperature offset 
associated with traditional, differential-based thermostats. 

 

All models contain one digital input, which can be set by the user to 
monitor filter status, activate a remote temporary occupancy switch, and/or used as a general purpose service 
indicator. The two models contain a SPST auxiliary switch, which can be used to control lighting or disable the 
economizer function and a discharge air sensor input. 

 

The thermostats are also compatible with the new Vykon PIR cover accessories. Thermostats equipped with 
a PIR cover provide advanced active occupancy logic, which will automatically switch occupancy levels from 
Occupied to Stand-By and Unoccupied as required by local activity being present or not. This advanced 
occupancy functionality provides advantageous energy savings during occupied hours without sacrificing 
occupant comfort. All thermostats can be ordered with or without a factory installed PIR cover ( see ordering 
notes below ). 

 

The additional following documentation is available: 

  VYKONStat PIR Ready VT76xx Series BACnet Integration Guide 

  VYKONStat PIR Ready VT6x7 Series LonWorks Integration Guide 

  VYKONStat PIR Application Guide 

  VYKONStat PIR Cover Assembly Installation Guide 

 

VYKONStat Wireless Controller Application Guide 

 

Models Available 

 

 

 

Application 

2 Heat / 2 Cool 

Model (programmable) 

VT7657B5x28(X) 

Model (non-programmable) 

VT7607B5x28(X) 

Ordering Information Notes: 

-

 

(X)

 model number represents available communication options: 

X=none

 for Stand-alone, 

X=B

 for BACnet MS-TP, 

X=

E for Echelon and 

X=W

 for 

Wireless 

-

  Thermostats can be ordered with a factory installed PIR cover. Please use (5500) extension instead of the (5028) only extension.: Ex. VT7607B5500E. 

-

  Thermostats ordered without a PIR cover can be retrofitted with a separate PIR accessory cover afterwards when required  

 

Features and benefits 

 

 

 

Features

 

Benefits

  Advanced occupancy functions 

  Through the network or smart local occupancy sensing 

  Ready for PIR accessory cover 

  Fully integrated advanced occupancy functionality with 

a PIR accessory cover 

  Embedded humidification sequence (0-10 Vdc output) 

and dehumidification sequence (dry contact) 

  Simplifies installation and reduce installation costs 

  Internal embedded RH sensor 

 Eliminates components 

  Proportional RH high limit override 

  Prevents costly damage due to over-humidification 

  Humidity setpoint reset based on outdoor temperature 

  Saves energy and prevents window condensation in 

colder climates 

  PI time proportioning algorithm 

  Increased comfort , accuracy, and energy savings 

  1 digital input 

 Adds functionality 

 Smart fan 

  Saves energy during night mode 

  Unique configuration key with password protection 

  Minimizes parameter tampering 

  6 hour reserve time for clock 

No need to reprogram day/time after power shortage

  Remote outdoor temperature sensor 

Increase flexibility and functionality 

 Auxiliary output 

Can be used for lighting and/or economizer override

  Discharge air humidity sensor ( 0-10 Vdc input ) 

  Can be used to limit supply RH levels 

  Intuitive, menu-driven programming (7 day, 2/4 events - 

on programmable models only) 

  Can be used for all types of establishments 

 

Summary of Contents for VT7607B5x28(X)

Page 1: ...dy VT6x7 Series LonWorks Integration Guide VYKONStat PIR Application Guide VYKONStat PIR Cover Assembly Installation Guide VYKONStat Wireless Controller Application Guide Models Available Application...

Page 2: ...2...

Page 3: ...er alarm will be displayed on the thermostat LCD screen when the input is energized It can be tied to a differential pressure switch that monitor filters Rem NSB remote NSB timer clock input Will disa...

Page 4: ...push on it until the tabs lock it 10 Strip each wire 1 4 inch 11 Insert each wire according to wiring diagram 13 Gently push back into hole excess wring Fig 5 14 Re Install wiring terminals in correc...

Page 5: ...internal wiring Jumper J1 T1 24 Vac Cool Stage 2 Y2 Y1 Jumper J1 See note 1 previous page Fan RC G C Heat Stage 1 W1 RH W2 Auxiliary Output Field contact Com 24V Remote Outdoor Sensor Digital Input 0...

Page 6: ...hermostat Remote humidity sensor accessories Model no Description VH2020W1028 Wall mounted humidity sensor VH2020D1028 Duct mounted humidity sensor VH2020W1028 remote wall mounted room humidity sensor...

Page 7: ...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...

Page 8: ...122 F indicates a shorted sensor Associated functions such as mode lockouts are automatically disabled A minimum range status 40 C 40 F is not displayed and indicates a opened sensor or a sensor not...

Page 9: ...increase temperature setpoint and to adjust the desired values when programming and configuring the thermostat When left unattended for 45 seconds the display will resume automatic status display scr...

Page 10: ...will be prompted with the present mode Heating or Cooling of the thermostat and its setpoint The Up arrow key will increment the setpoint by 0 5 degree F or C The Down arrow key will decrement the set...

Page 11: ...ehumidification 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 thermostat will...

Page 12: ...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 sc...

Page 13: ...e 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 Setpoin...

Page 14: ...3 hours Use to set value Yes key to confirm Schedule resume Resume regular scheduling cancels the permanent hold and re enables the regular programming as set per internal scheduling or as per remote...

Page 15: ...orking address Default value 254 Range is 0 to 254 Conditional parameter to BACnet MS TP models VT76xxX5x28B Conditional parameter to Wireless models VT76xxX5x28W This parameter will only appear when...

Page 16: ...ut 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 o...

Page 17: ...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 unoccup...

Page 18: ...or 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...

Page 19: ...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 even...

Page 20: ...network value is transmitted to the thermostat 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 1...

Page 21: ...et 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 t...

Page 22: ...e 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 includ...

Page 23: ...etpoint 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 Wrong mode selected Selec...

Page 24: ...erify wiring Digital display shows missing digits or erratic segments Defective display Replace thermostat RH sensor is out of range Verify the remote RH sensor or the internal RH sensor System Mode i...

Page 25: ...0 Vdc into 2K resistance min Humidification analog output accuracy 3 typical Wire gauge 18 gauge maximum 22 gauge recommended Dimensions 4 94 x 3 38 x 1 13 Approximate shipping weight 0 75 lb 0 34 kg...

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