AAON PREHEAT-X സീരീസ് മൊഡ്യൂൾ ജനറൽ പർപ്പസ് കൺട്രോളർ ഉപയോക്തൃ ഗൈഡ്

www.aaon.com

എല്ലാ മാനുവലുകളും ഡൗൺലോഡ് ചെയ്യാനും ലഭ്യമാണ് www.aaon.com/controlsmanuals.

AAON
2425 സൗത്ത് യുക്കോൺ അവന്യൂ.
തുൾസ, ശരി 74107-2728
www.aaon.com
ഫാക്ടറി സാങ്കേതിക പിന്തുണ ഫോൺ: 918-382-6450
AAON നിയന്ത്രണ പിന്തുണ: 866-918-1100
കൃത്യവും നിലവിലുള്ളതുമായ ഉൽപ്പന്ന വിവരങ്ങൾ നൽകുക എന്നതാണ് AAON-ന്റെ ഉദ്ദേശ്യം. എന്നിരുന്നാലും, ഉൽപ്പന്ന മെച്ചപ്പെടുത്തലിന്റെ താൽപ്പര്യത്തിൽ, അറിയിപ്പോ ബാധ്യതയോ ബാധ്യതയോ കൂടാതെ അതിന്റെ ഉൽപ്പന്നത്തിന്റെ വിലനിർണ്ണയം, സവിശേഷതകൾ, കൂടാതെ/അല്ലെങ്കിൽ ഡിസൈൻ എന്നിവ മാറ്റാനുള്ള അവകാശം AAON-ൽ നിക്ഷിപ്‌തമാണ്.

AAON P/N: V97760, Rev. C
© December 2024 AAON Inc. All rights reserved throughout the world.
AAON® എന്നത് AAON, Inc., Tulsa, OK-യുടെ രജിസ്റ്റർ ചെയ്ത വ്യാപാരമുദ്രയാണ്.
ഈ ഡോക്യുമെൻ്റിലെ പിശകുകൾക്കോ ​​ഒഴിവാക്കലുകൾക്കോ ​​ഒരു ഉത്തരവാദിത്തവും AAON ഏറ്റെടുക്കുന്നില്ല.
ഈ പ്രമാണം അറിയിപ്പ് കൂടാതെ മാറ്റത്തിന് വിധേയമാണ്.

ഓവർVIEW

പൊതുവിവരം

കഴിഞ്ഞുview

The PREHEAT-X-EXT is designed to control fixed stages of Preheat and optional modulating Preheat to maintain a desired Preheat Leaving Air Temperature Setpoint. See Figure 1, this page for dimensions. See Figure 2 and 3, pages 7 and 8 for wiring details.

The PREHEAT-X-EXT Module has a lower minimum Leaving Air Temperature Setpoint (0ºF). It should only be used with the approval of AAON.

കുറിപ്പ്: The PREHEAT-X-EXT contains no user- serviceable parts. Contact a qualified technician if your PREHEAT-X-EXT is not operating correctly.

ഫീച്ചറുകൾ

The PREHEAT-X-EXT has the following features:

• Can be operated in Stand-Alone Mode or in Communications Mode with the VCCX2 or other AAON unit controllers.
• Monitors the Preheater Leaving Air Temperature and Leaving Air Reset Signal and controls to maintain the setpoint.
• Has a lower minimum Leaving Air Temperature Setpoint (0ºF).
• Contains a 2 x 8 LCD character display and four buttons that allow for status display and setpoint changes.

വയറിംഗ്

പ്രധാന വയറിംഗ് പരിഗണനകൾ

വയറിംഗ്

The modules must be connected to an 18-30 VAC power source of the proper size for the calculated VA load requirements. All transformer sizing should be based on the VA ratings listed in Table 1, this page.

കുറിപ്പ്: If the temperature at the PREHEAT-X-EXT is below -4ºF (-20ºC), the display refresh rate could be less responsive.

മുന്നറിയിപ്പ്: When using a single transformer to power more than one controller or expansion module, the correct polarity must always be maintained between the boards. Failure to observe correct polarity will result in damage to the AAON unit controller, PREHEAT-X-EXT, and any associated module.

Please carefully read and apply the following information when wiring the AAON unit controller, PREHEAT-X-EXT and any associated module.

1. All wiring is to be in accordance with local and national electrical codes and specifications.
2. All 24 VAC wiring must be connected so that all ground wires remain common. Failure to follow this procedure can result in damage to the controller and connected devices.
3. Minimum wire size for 24 VAC wiring should be 18-gauge.
4. Minimum wire size for all sensors should be 24-gauge. Some sensors require two-conductor wire and some require three-or four-conductor wire.
5. Minimum wire size for 24 VAC thermostat wiring should be 22-gauge.
6. Be sure that all wiring connections are properly inserted and tightened into the terminal blocks. Do not allow wire strands to stick out and touch adjoining terminals which could potentially cause a short circuit.
7. When communication wiring is to be used to interconnect AAON unit controllers together or to connect to other communication devices, all wiring must be plenum-rated, minimum 18-gauge, two- conductor, twisted-pair with shield. AAON can supply communication wire that meets this specification and is color coded for the network or local loop. Please consult your AAON distributor for information. If desired, Belden #82760 or equivalent wire may also be used.
8. Before applying power to the AAON unit controller, PREHEAT-X-EXT, and any associated modules, be sure to recheck all wiring connections and terminations thoroughly.

ശക്തിപ്പെടുത്തുന്നു
When the controller and modules are first powered up, the POWER LED should light up and stay on continuously. If it does not light up, check to be sure that you have 24 VAC connected to the controller, that the wiring connections are tight, and that they are wired for the correct polarity. The 24 VAC power must be connected so that all ground wires remain common. If after making all these checks, the POWER LED does not light up, please contact AAON Controls Support for assistance.

ഇൻപുട്ട് വയറിംഗ്

ഇൻപുട്ടുകൾ

The PREHEAT-X-EXT can be operated in Stand-Alone Mode or in Communications Mode with the VCCX2 or other AAON unit controllers. For connection to the PREHEAT-X-EXT use an E-BUS cable connecting to the appropriate E-BUS ports. The Reset Input and Heat Enable are only used in Stand-Alone Mode. See Figure 2, this page for the Inputs Wiring Diagram.

ഔട്ട്പുട്ടുകൾ വയറിംഗ്

ഔട്ട്പുട്ടുകൾ

The PREHEAT-X-EXT can be operated in Stand-Alone Mode or in Communications Mode with the VCCX2 or other AAON unit controllers. For connection to the PREHEAT-X-EXT, use an E-BUS cable connecting to the appropriate E-BUS ports. See Figure 3, this page for Outputs Wiring.

ഇൻപുട്ടുകളും ഔട്ട്പുട്ടുകളും

Analog and Binary Inputs, Analog Outputs and Relays

I/O മാപ്പ്
കാണുക Table 2, this page to reference the inputs and outputs that are available on the PREHEAT-X-EXT.

അനലോഗ് ഇൻ‌പുട്ടുകൾ‌

Leaving Air Temperature 1 (LAT1)
When enabled, the PREHEAT-X-EXT controls a Leaving Air Temperature (LAT) Setpoint. The PREHEAT-X-EXT can be configured to use only LAT1 for this purpose. Typically, the average of LAT1 and LAT2 is used.

Leaving Air Temperature 2 (LAT2)
When enabled, the PREHEAT-X-EXT controls a Leaving Air Temperature Setpoint. It can be configured to use only LAT2 for this purpose. Typically, the average of LAT1 and LAT2 is used.

വായുവിന്റെ താപനിലയിൽ പ്രവേശിക്കുന്നു
When the Entering Air Temperature falls below the Entering Air Temperature Setpoint, preheat will be enabled.

കുറിപ്പ്: For AI1 through AI3, all temperature sensors must be Thermistor Type III Temperature Sensors, which provide 77.0ºF @ 10K ohms resistance.

Reset Input (0-10 VDC)
When the PREHEAT-X-EXT is used as a stand-alone module, the Leaving Air Temperature Setpoint can be reset by supplying a 0-10 VDC signal to the RST IN low voltage terminal block. This reset signal is optional and need only be used if you require resetting of the Discharge Air Temperature.

ബൈനറി ഇൻപുട്ടുകൾ

Heat Enable Contact (HEAT EN)
This input is only required when the PREHEAT-X-EXT is used in Stand-Alone Mode; it is not required when communicating with an AAON unit controller. The Heat Enable input is activated by a 24 VAC signal supplied from a building automation system to enable the PREHEAT-X-EXT. The module will not operate without 24 VAC being applied to this input terminal when used as a stand-alone module. When the Heat Enable Signal is lost or turned off, all stages deactivate immediately.

അടിയന്തര ഷട്ട്ഡൗൺ ഇൻപുട്ട്
This wet contact (24 VAC) input is used to initiate shutdown of the HVAC unit when a normally closed Smoke Detector (by others), Firestat (by others), or other shutdown condition (by others) occurs and the contact is opened. The PREHEAT-X-EXT remains active and can initiate alarm relays.

അനലോഗ് ഔട്ട്പുട്ടുകൾ

0-10 VDC Modulating SCR
Depending on the type of Heat used, this output will supply a 0-10 VDC output signal for control of the modulating SCR Heat.

Pulse Width Modulating SSR
Depending on the type of Heat used, this output will supply a 12 V PWM Output Signal for control of the modulating SSR Heat.

റിലേ p ട്ട്‌പുട്ടുകൾ

Relay #1 – Alarm
This relay sends a signal when an alarm is enabled.

Relays #2 – 7
These relays are Fixed Stage Heat Outputs.

പ്രവർത്തനങ്ങളുടെ ക്രമം

ഓപ്പറേഷൻ മോഡുകൾ

സ്റ്റാൻഡ്-അലോൺ മോഡ്
When used in Stand-Alone Mode, the PREHEAT-X-EXT will modulate SCR or SSR Heat and stage any additional fixed stages to maintain the Leaving Air Temperature Setpoint configured on the PREHEAT-X-EXT LCD display. The PREHEAT-X-EXT is activated by a 24 VAC signal to the HEAT EN Input.

ആശയവിനിമയ മോഡ്
When the PREHEAT-X-EXT is connected and communicating with an AAON unit controller via a modular cable, the necessary information will be passed between the PREHEAT-X-EXT and the AAON unit controller to properly operate in the Heating Mode.

If the communication is interrupted between the PREHEAT-X- EXT and the AAON unit controller, both boards will show an alarm and the PREHEAT-X-EXT outputs will turn off. When communication is restored, the alarms will go away.

In this configuration, the Leaving Air Temperature Setpoints and the Preheat Enable Setpoints are set using the main AAON unit controller.

പ്രീഹീറ്റ് പ്രവർത്തനക്ഷമമാക്കുക

സ്റ്റാൻഡ്-അലോൺ മോഡ്
Enabled when the Binary Input (BI1) is closed and the Entering Air Temperature is below setpoint.

E-BUS Communications Mode
Enabled by an E-BUS command when the Entering Air Temperature falls below the Preheat Setpoint.

BACnet Communications Mode
Enabled by BACnet® command or Binary Input (BI1), whichever occurs first.

Leaving Air Sensor
The PREHEAT-X-EXT can be configured to use one of three sensor configurations for control.

• Leaving Air Sensor 1 only (LAT1)
• Leaving Air Sensor 2 only (LAT2)
• Average Leaving Air Temperature from LAT1 and LAT2

Leaving Air Setpoint

ഒറ്റയ്ക്ക്

• Leaving Air Temperature Setpoint can be reset between the Leaving Air Temperature Setpoint and LAT Setpoint Reset Limit.
• The Reset Source is based on a 0-10 VDC input and range can be adjusted using the Leaving Air Temperature Setpoint Reset Source Low and Leaving Air Temperature Setpoint Reset Source High Setpoints.

E-BUS and BACnet Communications Mode

• A Leaving Air Temperature Setpoint will be sent to the controller.
• This value is stored in volatile memory and will be lost at reset.
• There are separate Leaving Air Temperature setpoints, depending on if the unit is in Heating, Vent, or Cool Mode.

മോഡുലേറ്റിംഗ് ഹീറ്റ്

• If configured, the Modulating Heat Output will be used as the first stagഇ ചൂട്.
• അനലോഗ് വോളിയംtage Output can be adjusted between 0-10 VDC as needed to maintain the Leaving Air Setpoint.
• Controlled by an Internal PID Loop.

ചൂട് എസ്taging Up

The following conditions must be met before the first (next) stage of heat can be energized:

• Preheat Enable Signal/Command must be active.
• The Leaving Air Temperature must be below the Leaving Air Temperature Setpoint.
• If Mod Heat is configured, it must be at 100% for the Stage Up Delay.
• The Minimum Off Time must be met.
• എസ്tage Up Delay must be met (for second stage and above).

ചൂട് എസ്taging Down

The following conditions must be met before a stage of heat can be de-energized:

• Preheat Enable Signal/Command is deactivated or the Leaving Air Temperature must be above the Leaving Air Temperature Setpoint by the Leaving Air Temperature Deadband.
• If Modulating Heat is configured, it must be at 0% for the Stage Down Delay.
• The Minimum Run Time must be met.
• എസ്tage Down Time must be met.

അടിയന്തര ഷട്ട്ഡൗൺ

The Emergency Shutdown Input must always be used and wired as a 24 VAC normally closed contact. If an Emergency Shutdown occurs, and that contact opens:

• All outputs will be immediately de-energized.
• An alarm will be generated.

High Leaving Air Temperature Alarm

If the Leaving Air Temperature is above the Leaving Air Temperature High Temp-erature Alarm Limit for more than the Alarm Delay, all heating outputs will be de-energized immediately.

• An alarm will be generated.
• A manual reset will be required.

Low Leaving Air Temperature Alarm
If the Leaving Air Temperature is below the Leaving Air Temperature Low Temperature Alarm Limit for more than two minutes, the heat will remain on but an alarm will be generated.

LCD SCREENS

നാവിഗേഷൻ കീകൾ

LCD Display Screen & Navigation Keys

എൽസിഡി ഡിസ്പ്ലേ സ്ക്രീനുകളും ബട്ടണുകളും നിങ്ങളെ അനുവദിക്കുന്നു view status and alarms, and enable force modes. See Figure 4, this page റഫർ ചെയ്യുക Table 3 and 4, this page വിവരണങ്ങൾക്കായി.

Main Screens Map

പ്രധാന സ്‌ക്രീനുകൾ

പ്രധാന സ്‌ക്രീനുകൾ

Refer to the following map when navigating through the LCD Main Screens. The first screen is an initialization screen. To scroll through the rest of the screens, press the ബട്ടൺ.

സ്റ്റാറ്റസ് സ്ക്രീനുകൾ

Refer to the following map when navigating through the Status Screens. From the STATUS Screen, press to scroll through the screens.

Setpoints Screens

Setpoint Screens

Refer to the following map when navigating through the Setpoint Screens. From the SETPOINTS Screen, press to scroll through the screens and change setpoints. Use the ഒപ്പം arrow keys to change your selections. Then press പുതിയ സെറ്റ് പോയിന്റ് സംരക്ഷിക്കാൻ.

കുറിപ്പ്: When the PREHEAT-X-EXT is operating in Communications Mode, these setpoint screens will not appear on the LCD display because they are controlled by the main controller.

അലാറം സ്‌ക്രീൻ

അലാറം സ്‌ക്രീൻ
Refer to the following map when viewing the ALARMS Screens. These screens will display automatically when alarms are present. For alarm troubleshooting.

The alarms are as follows:

അലാറങ്ങളൊന്നുമില്ല: This will be shown if there are no current alarms.

E-SHUTDN: If 24 VAC is removed from the Emergency Shutdown Input, this alarm will activate and the controller will turn off all outputs. The alarm will be disabled when voltage has returned.

LA1 SENS: The first Leaving Air Temperature Sensor has been disconnected, shorted, open, or missing for more than 60 seconds. This alarm will be disabled when the sensor is working again.

LA2 SENS: The second Leaving Air Temperature Sensor has been disconnected, shorted, open, or missing for more than 60 seconds. This alarm will be disabled when the sensor is working again.

LOW LAT: This indicates a Leaving Air Temperature Cutoff alarm condition. If the Leaving Air Setpoint is less than 35ºF, the alarm will trigger then the Leaving Air Temperature is 10ºF cooler for two minutes.

HI LAT: This indicates a Leaving Air Temperature Cutoff alarm condition which is activated if the controlling Leaving Air Temperature has risen above 120ºF. All outputs will stagഇ ഓഫ്.

EA SENS: The Entering Air Temperature Sensor has been disconnected, open, shorted, or missing for more than 60 seconds. This alarm will be disabled when the sensor is working again.

COM STAT: Communications have been lost with the main controller for more than 30 seconds. This alarm will disable when communications resume.

Configuration Screens

Refer to the following map when navigating through the Configuration Screens. From the CONFIG Screen, press to scroll through the screens and change setpoints. Use the ഒപ്പം arrow keys to change your selections. Press എന്തെങ്കിലും മാറ്റങ്ങൾ സംരക്ഷിക്കാൻ.

Communication Configuration Screens

Communication Configuration Screens

From the COMM CONFIG Screen, press to scroll through the screens and change setpoints. Use the ഒപ്പം arrow keys to change your selections. Press എന്തെങ്കിലും മാറ്റങ്ങൾ സംരക്ഷിക്കാൻ.

ട്രബിൾഷൂട്ടിംഗ്

LED ഡയഗ്നോസ്റ്റിക്സ്

ജനറൽ

The PREHEAT-X-EXT is equipped with LEDs that can be used to verify operation and perform troubleshooting. See Figure 6, this page for the LED locations. The LEDs associated with these inputs and outputs allow you to see what is active without using a voltmeter. The LEDs and their uses are as follows:

STATUS LED- കൾ
പവർ – This green LED will light up to indicate that 24 VAC power has been applied to the module.

ഡയഗ്നോസ്റ്റിക് LED- കൾ
അലാറം – This red LED located on the PREHEAT-X-EXT’s cover above the LCD display will light up to indicate an alarm. The type of alarm(s) will be shown on the LCD display.

ആശയവിനിമയം LED
COMM – This yellow LED will light up and blink when communications are detected.

റിലേ എൽഇഡികൾ
RLY 1-6 – These green LEDs will light up and stay lit as long as the Heat Relay(s) is active.

Binary Input LEDs
HEAT EN – This green LED will light up when Heat is enabled.

എമർജൻസി ഷട്ട്ഡൗൺ – This green LED will light up when the Emergency Shutdown Input (BI2) has 24 VAC applied to it.

അലാറങ്ങൾ

അലാറങ്ങൾ ട്രബിൾഷൂട്ടിംഗ്

Mechanical Failure:

• Check relay outputs on the PREHEAT-X-EXT for 24 VAC output.
• ഔട്ട്പുട്ട് വോളിയം പരിശോധിക്കുകtage (VOUT and GND) to SCR or PWM.
• Verify that the Leaving Air Temperature Sensor(s) is connected to AI1 and/or AI2 and GND on the PREHEAT-X-EXT.
• Verify that the Leaving Air Temperature Sensor probe(s) is mounted correctly.
• Remove AI1 and AI2 and GND wiring from the PREHEAT-X-EXT and take a resistance reading across the sensor (this may indicate open or failed wiring). See പട്ടിക 5.

Leaving Air Temperature Failure:

• Verify that the Leaving Air Temperature sensor(s) is connected to the AI1 and/or AI2 and GND on the PREHEAT-X-EXT.
• Remove AI1 and AI2 and GND wiring from the PREHEAT-X-EXT and ohm out the sensor (this may indicate open or failed wiring). See പട്ടിക 5.

Communications Loss:

• Check COMM LED on PREHEAT-X-EXT.
• Verify 24 VAC power to all interconnected controllers.
• Verify connection between the PREHEAT-X-EXT and associated controllers.
• In Communications Mode (connected with a modular cable), verify the PREHEAT-X-EXT configuration on the controller.

APPENDIX A: LAT SENSOR

ഇൻസ്റ്റലേഷൻ

Mounting the Leaving Air Temperature Sensor

The Leaving Air Temperature Sensor should be located in the PREHEAT-X-EXT box’s output location.

Locate the sensor in the center of the widest part of the PREHEAT-X-EXT box wall. Use the supplied template and a 5/16 inch drill to make a hole for the sensor.

Install the gasket over the probe and mount securely to the box wall using the supplied sheet metal screws. Be sure the gasket is compressed to provide an air tight seal.

For best accuracy, apply insulation on the outside of the box wall, over the sensor. This will help prevent thermal gradients from affecting the sensor.

മുന്നറിയിപ്പ്: Make sure your Leaving Air Temperature Sensor(s) are mounted and wired according to these instructions prior to testing the unit or else the modulating valve will not control properly and may damage your equipment.

സെൻസർ പരിശോധന

Leaving Air Temperature Sensor

If you suspect the Entering or Leaving Air Temperature Sensor is not reading correctly, make sure the wiring terminal connections are tight and that any wiring splices are properly connected. You can check the operation of the Leaving Air Temperature Sensor by measuring the resistance or voltage using a digital multimeter. Set the meter to DC Volts. Place the positive probe on the AI terminal and the negative probe on the GND terminal. Read the DC Volts and find that voltagഇ ഇൻ Table 5, this page.

Read the temperature corresponding with that voltage and determine if this is close to the actual temperature the sensor is exposed to. If the temperature from the chart is different by more than a few degrees, you probably have a defective or damaged sensor. You can also check the sensor resistance to determine correct operation.

തെർമിസ്റ്റർ സെൻസർ പരിശോധന നിർദ്ദേശങ്ങൾ

To read the resistance, set the meter to ohms. Unplug the sensor connector from the board and measure the resistance across the disconnected wires. This resistance should match the corresponding temperature from Table 5, this page.

തെർമിസ്റ്റർ സെൻസർ പരിശോധന നിർദ്ദേശങ്ങൾ

1. കൺട്രോളറുകളിൽ നിന്ന് വിച്ഛേദിക്കപ്പെട്ടിരിക്കുമ്പോൾ (പവർ ചെയ്തിട്ടില്ല) തെർമിസ്റ്റർ സെൻസർ പരിശോധിക്കാൻ റെസിസ്റ്റൻസ് കോളം ഉപയോഗിക്കുക.
2. വോളിയം ഉപയോഗിക്കുകtagപവർഡ് കൺട്രോളറുകളുമായി ബന്ധിപ്പിക്കുമ്പോൾ സെൻസറുകൾ പരിശോധിക്കുന്നതിനുള്ള e കോളം. വാല്യം വായിക്കുകtagമീറ്റർ ഡിസി വോൾട്ടുകളിൽ സജ്ജീകരിച്ചിരിക്കുന്ന e. GND ടെർമിനലിൽ “-” (മൈനസ്) ലീഡും പരിശോധിക്കപ്പെടുന്ന സെൻസർ ഇൻപുട്ട് ടെർമിനലിൽ “+” (പ്ലസ്) ലീഡും സ്ഥാപിക്കുക.

APPENDIX B: BACnet®

Connection to MS/TP Network

PREHEAT-X-EXT BACnet® Points

കുറിപ്പ്: These BACnet® points are only available if the unit is being used as a stand alone device. If connected to a VCCX2, refer to the VCCX2 Technical Guide for BACnet® points.

PREHEAT-X-EXT BACnet® Property ഐഡൻ്റിഫയർ

BACNETPropertyIdentifier :
AllAlarmGroup1Bits ::= BIT STRING {
Reserved (0),
BadLeavingAir1 (1),
BadLeavingAir2 (2),
LowLeavingAir (3),
HighLeavingAir (4),
Reserved (5),
BadEnteringAir (6),
CommAlarm (7),
ShutDownAlarm (8)

PREHEAT-X-EXT Technical Guide
V97760 · Rev. D· 241206

AAON നിയന്ത്രണ പിന്തുണ:
പിന്തുണ.കൺട്രോൾസ്@aaon.com

നിയന്ത്രണ പിന്തുണ Webസൈറ്റ്:
www.aaon.com/aaon-controls-technical-support

AAON ഫാക്ടറി സാങ്കേതിക പിന്തുണ:
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