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Table des Matières
Manuels Connexes pour Airstream TC4-NVS
Sommaire des Matières pour Airstream TC4-NVS
- Page 1 Environment Control TC4-NVS USER'S MANUAL M 890-00157 rev. 04 REV. 00...
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Page 2: Table Des Matières
Principle of Operation ........... 23 Curtain Operating Time Compensation ......25 COOLING AND MIST SETTINGS ........28 Minimum Ventilation Cycle ..........28 Mist Timer ..............28 HEATER SETTINGS............31 TROUBLESHOOTING GUIDE........33 ALARM SETTINGS ............34 TECHNICAL SPECIFICATIONS ........37 TC4-NVS.rev.04... -
Page 3: Precautions
DO NOT SPRAY WATER ON THE CONTROLLER FOR CUSTOMER USE Enter the serial number located on the side of the controller below for future reference. TC4-NVS Model number: Serial number: TC4-NVS.rev.04... -
Page 4: Features
FEATURES The TC4-NVS is an electronic device used for environmental control in live- stock buildings and greenhouses. It allows the user to maintain a specified target temperature by controlling the operation of ventilation and heating equipment. One stage of either constant-speed fans, heating units or mist sprinklers, as well as curtains for natural ventilation, can be connected to the controller. - Page 5 TC4-NVS HIGH/LOW TEMPERATURE AND POWER FAILURE ALARMS The controller generates an output signal that will activate any alarm sys- tem in case of a rise or fall in temperature beyond a specified limit, a power failure or a fault in the supply circuit.
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Page 6: Location Of The Controls
LOCATION OF THE CONTROLS NATURAL VENTILATION CONTROLLER TC4-NVS.rev.04... - Page 7 TC4-NVS Three-Digit Display Displays temperatures and other parameters shown on the Adjustment Knob. Curtain Opening Pilot Light Turns on when the curtains open. Curtain Closing Pilot Light Turns on when the curtains close. Stage 2 Pilot Light Turns on when Stage 2 fans, heaters or mist units are on.
- Page 8 TC4-NVS Internal Switches The internal switches are located on the inside of the front cover and are defined as follows: NOTE : When the controller is shipped from the factory, all the switches are set to OFF. TC4-NVS.rev.04...
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Page 9: Factory Settings
Each new setting will replace the preceeding one. ii) If the power supply is cut off, the last parameter settings will be re- tained in memory until the power is restored. (a) The range of values for curve temperatures is 35°F to 99.9°F (1.7°C to 37.7°C). TC4-NVS.rev.04... -
Page 10: Installation
One type activates when current is cut off at its input, whereas the other activates when current is supplied at its input. For an alarm of the first type, use the NO terminal as shown in the wiring diagram. For an alarm of the second type, use the NC terminal. TC4-NVS.rev.04... -
Page 11: Temperature Probes
TC4-NVS ALL WIRING MUST BE DONE BY AN AUTHORIZED ELECTRICIAN AND MUST COMPLY WITH APPLICABLE CODES, LAWS AND REGULATIONS. BE SURE POWER IS OFF BEFORE DOING ANY WIRING TO AVOID ELECTRICAL SHOCKS AND EQUIPMENT DAM- WARNING AGE. EMPERATURE PROBES Connecting the Probes The controller is supplied with one temperature probe connected to terminal # 1. - Page 12 TC4-NVS Extending the Probes Each probe can be extended up to 500 feet (150 m): Use a shielded cable of outside diameter between 0.245 and 0.260 in (6.22 and 6.60 mm) to ensure the cable entry is liquid tight (cable dimensions should not be under 18 AWG). Do not ground the shielding.
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Page 13: Configurations
Temperature falls: When the temperature falls to Set Point - Diff. 1, the curtains begin to close intermittently according to the curtain timer set- tings. At Set Point - Offset - Diff., the heater units turn on. Note: Heating units do not operate with the timer. TC4-NVS.rev.04... - Page 14 TC4-NVS TAGE 2 — VENTILATION COOLING 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5...
- Page 15 TC4-NVS TAGE 2 — MIST COOLING 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5...
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Page 16: Changing The Parameter Settings
(as long as the temperature curve is deactivated). To lock the parameter settings: Set internal switch # 1 to ON. The Locked Parameter Pilot Light turns on. To unlock the parameter settings: Set internal switch # 1 to OFF. The Locked Parameter Pilot Light turns off. TC4-NVS.rev.04... -
Page 17: Adjusting The Temperature
# 3, 4 and 5. Set the selection knob to AMBIENT. The room temperature is dis- played. Press the push-button. "Pr 1" is displayed, alternating with the temperature measured by the probe connected to terminal # 1 (sup- plied with the controller). TC4-NVS.rev.04... -
Page 18: Temperature Set Point
TC4-NVS Press the push-button once again to display the temperature, etc. Viewing Minimum / Maximum Temperatures The minimum and maximum temperatures are the lowest and highest tem- perature values recorded since the last reset. Temperatures values are averaged over all active probes. -
Page 19: Temperature Curve
TC4-NVS NOTE: The temperature set point can be adjusted only if the temperature curve is deactivated (see following section). EMPERATURE CURVE The user can define a temperature curve to adjust the set point automatically over a given time period. A curve is defined using six points. Each point specifies a day number and a set point for that day. - Page 20 TC4-NVS Specifying the Temperature Curve Set the selection knob to SET POINT /TEMP. CURVE. The current temperature set point flashes on the display. Press the push-button. The word OFF is displayed indicating that the termperature curve is deactivated. If this is not the case, see below to deactivate the curve.
- Page 21 TC4-NVS Turn the adjustment knob clockwise one notch and leave in this position for at least 10 seconds. The word ON flashes on the dis- play and after 10 seconds, the Temperature Curve Pilot Light turns on indicating that the temperature curve is now activated.
- Page 22 TC4-NVS Deactivating the Temperature Curve Set the selection knob to SET POINT /TEMP. CURVE. The current temperature set point flashes on the display. Press the push-button to display the points of the curve actually defined until the word ON appears (fourteen clicks).
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Page 23: Curtains
If the temperature rises to 70.3 F, the curtains stop closing. The curtains close intermittently according to the time closing and time off settings: TIME CLOSING CLOSE STOP CLOSING TIME OFF TC4-NVS.rev.04... - Page 24 TC4-NVS Manual Operation of the Curtains Set the selection knob to MANUAL OPERATION. The display flashes "OFF" and the curtains stop functioning after five seconds. Press the push-button. The display flashes "OPE" and the curtains start opening after five seconds.
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Page 25: Curtain Operating Time Compensation
TC4-NVS Use the adjustment knob to set the time closing to the desired value. Set the selection knob to CURTAINS - TIME OFF. The current cur- tain time off flashes on the display. Use the adjustment knob to set the off time to the desired value. - Page 26 TC4-NVS EXAMPLE 1 Set Point = 75 Temperature = 78.3 Differential = 3 TIME Compensation = 1 OPENING CYCLE According to Table 1 below, the temperature difference of 0.3 degrees gives a compensation factor of one. Therefore, the Time Opening value main- tains its current value.
- Page 27 TC4-NVS EXAMPLE 2 Set Point = 75 Temperature = 79.8 TIME Differential = 3 OPENING Compensation = 2 CYCLE In the second example above, the temperature has risen to: Set Point: Differential: 79.8 According to Table 1 above, the temperature difference of 1.8 degrees gives a compensation factor of two.
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Page 28: Cooling And Mist Settings
The mist units operate according to a separate timer which functions in the same way as the minimum ventilation timer described above. When the temperature is such that stage 2 (defined as a mist stage) is in operation, the mist units run through the cycle settings defined for stage 2. TC4-NVS.rev.04... - Page 29 TC4-NVS Adjusting the Minimum Ventilation or Mist Timer Set the selection knob to STAGE 2 - TIMER. The current Time On is displayed, alternating with the word "On". Use the adjustment knob to set the Time On to the desired value.
- Page 30 TC4-NVS Adjusting the Cooling or Mist Offset The offset for Stage 2 is the temperature interval from the set point at which the fans or mist units turn off (see the diagram in the Configurations Section). The offset can be adjusted between 0.5°F and 20.0°F (0.3°C and 11.1°C).
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Page 31: Heater Settings
The heater offset can be adjusted between 0 and 20.0 °F (0 and 11.1 °C) if the negative heater offset is deactivated; it can be adjusted between -9.9 and 20.0 °F (-5.5 and 11.1 °C) if the negative heater offset is activated. TC4-NVS.rev.04... - Page 32 TC4-NVS Enabling / Disabling Negative Heater Offset Normally, the heater offset is set to a positive value. It may also be useful to set it to a negative value to allow the heating units to operate when the room temperature is above the set point. In that case, the negative heater offset must be activated.
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Page 33: Alarm Settings
Set the selection knob to ALARM - LOW OFFSET. The current low offset appears flashing on the display. Using the adjustment knob, adjust the low offset to the desired value. The low offset can be adjusted between 0.5 F and 40.0 F (0.3 C and 22.0 TC4-NVS.rev.04... -
Page 34: Troubleshooting Guide
"P" and are defective. the defective probe pilot light is on. Follow the procedure described The Defective One or more probes in DEFECTIVE PROBES to Probe Pilot are defective. identify and replace the defec- Light is on. tive probe. TC4-NVS.rev.04... - Page 35 TC4-NVS PROBLEM CAUSE SOLUTION The display A variation in resist- Make sure the probes are dry shows ance is induced on a and move them away from sudden probe. drafts and sources of radiant variations in heating. room tem- There is electrical Isolate the probe cables from perature.
- Page 36 TC4-NVS PROBLEM CAUSE SOLUTION The fans, The stage's fuse is Replace the fuse. open. heating or mist units connected to Make sure the cable is firmly The display board one of the plugged in with the tabs in place. interconnect cable is...
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Page 37: Technical Specifications
-40.0° to 120.0°F (-40.0° to 48.9°C). Accuracy: 1.8 F (1 C) between 41 F (5 and 35 Enclosure: ABS, moisture and dust-tight. The room temperature where the controller is located MUST ALWAYS REMAIN BETWEEN 32 AND 104 F (0 AND 40 TC4-NVS.rev.04... - Page 38 NOTES...