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Symptom 

Possible Cause 

Corrective Action 

Wrong mode selected 

Select cooling mode 

Thermostat in Unoccupied 
mode 

Select Occupied Hold in Schedule hold or Override to 
force the thermostat Occupied cooling setpoint 

Anticycle delay active 

Wait, the anticycling 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 

Thermostat will not call 
for cooling 

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 

Wrong mode selected 

The thermostat will not 
turn on the fan 

Wiring error 

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 

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 in Cool or Off 

Change the system mode parameter to heat 

System Mode in Auto but a 
cooling demand at the 
thermostat 

Wait: when a heating demand will occur at the 
thermostat, humidification will resume 

Thermostat will not call 
for humidification 

High limit sensor is controlling 
the humidifier output by 
forcing it to 0% 

Wait: when the supply humidity will drop below the 
high limit setpoint, humidification will resume. 

RH sensor is out of range 

Verify the remote RH sensor or the internal RH 
sensor 

System Mode in Heat or Off 

Change the system mode parameter to cool 

System Mode in Auto but a 
heating demand at the 
thermostat 

Wait: when a cooling demand will occur at the 
thermostat, dehumidification will resume 

Thermostat will not call 
for dehumidification 

Outside air temperature is 
below the Dhu OALK 
parameter 

Change the Dhu OALK parameter to a value that will 
enable the dehumidification, if desired. 

 

Содержание VT7607B5x28(X)

Страница 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...

Страница 2: ...2...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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