AAON PREHEAT-X Series Module Controller
Fa'amatalaga o oloa
- Model: PREHEAT-X Module
- Controllers: VCCX-IP, VCCX2, VCB-X, VCM-X E-BUS
- Sensors: Air Temperature Sensor, Outside Air Sensor
- Cable Assembly: E-BUS Cable Assembly
- Power & Comm Cable Lengths: 1.5 Ft, 3 Ft, 10 Ft, 25 Ft, 50 Ft, 75 Ft, 100 Ft, 150 Ft, 250 Ft, and 1000 Foot Spool
Fa'atonuga o le Fa'aaogaina o Mea
Fa'amatalaga Lautele
The PREHEAT-X Module is designed to regulate temperature in HVAC systems. It works in conjunction with various controllers and sensors to maintain desired temperatures.
Ulufale ma Galuega Fa'atino
The module supports analog and binary inputs, analog outputs, and relays for precise control over the HVAC system. Refer to the user manual for detailed configuration options.
Fa'asologa o Galuega
The module offers different operation modes to suit various heating requirements. Users can select the appropriate mode based on their needs for efficient temperature control.
Fa'afitauli
In case of issues, refer to the LED diagnostics section in the manual to identify problems. The module also features alarms toalert users of any malfunctions that may occur during operation.
| PREHEAT-X REVISION LOG | |
| TOEFUAGA MA ASO | SUIGA |
|
Rev. E, Aperila 16, 2021 |
Updated part numbers, alarms and alarm history, and labels. Added Figure/Table content pages, and Fahrenheit/Celsius temperature conversion. Corrected cosmetic errors. |
| Rev. F, February 2, 2024 | updated screens, updated parts table, various cosmetic updates |
| PREHEAT-X PARTS REFERENCE | |
| VAEGA FAAMATALAGA | VAEGA NUMERA |
| PREHEAT-X Module | ASM01688 |
| VCCX-IP Pule | ASM07424 |
| VCCX2 Pule | ASM01698 |
| VCB-X Pule | ASM01862 |
| VCM-X E-BUS Pule | V07151 |
| Ea Temperature Sensor | G051240 (6 in.), G051250 (12 in.) |
| Outside Air Sensor | G042230 |
| E-BUS Cable Assembly E-BUS Power & Comm 1.5 Ft, 3 Ft, 10 Ft, 25 Ft, 50 Ft, 75 Ft, 100 Ft, 150 Ft, 250 Ft, and 1000 Foot Spool | G029440 (1.5 Ft), G012870 (3 Ft), G029460 (10 Ft), G045270 (25 Ft), G029510 (50 Ft), G029530 (75 Ft), G029450 (100 Ft), G029470 (150 Ft), V36590 (250 Ft), G018870 (SPOOL) |
O tusi lesona uma o lo'o avanoa foi mo le la'uina mai www.aaon.com/controlsmanuals.
- AAON
- 2425 South Yukon Ave. Tulsa, OK 74107-2728
- www.aaon.com
- Falegaosimea Lagolago Telefoni: 918-382-6450
- Lagolago Pulea AAON: 866-918-1100
- O le fa'amoemoe o le AAON e tu'uina atu fa'amatalaga sa'o ma le taimi nei o oloa. Ae ui i lea, mo le faʻaleleia atili o oloa, AAON faʻaagaga le aia e suia ai tau, faʻamatalaga, ma / poʻo le mamanu o ana oloa e aunoa ma se faʻaaliga, noataga, poʻo noataga.
- AAON P/N: G086640, Rev. F
- © February 2024 AAON Inc. All rights reserved throughout the world.
- AAON® is a registered trademark of AAON, Inc., Tulsa, OK. AAON assumes no responsibility for errors or omissions in this document.
- O lenei pepa e mafai ona suia e aunoa ma se fa'aaliga.
UMAVIEW
- The PREHEAT-X 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.
Vaega
The PREHEAT-X has the following features:
- Can be operated as a stand-alone module or communicating 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
- Contains a 2 x 8 LCD character display and four buttons that allow for status display and setpoint changes
FAAMANATU: The PREHEAT-X contains no user-serviceable parts. Contact qualified technical personnel if your PREHEAT-X is not operating correctly.
UIGA
Manatuga Taua Uea
O modules e tatau ona fesoʻotaʻi i se puna eletise 18-30 VAC o le lapopoa talafeagai mo manaʻoga VA fuafuaina. E tatau ona fa'avae uma le fa'avasegaina o le transformer i fa'ailoga VA o lo'o lisiina i le Laulau 1, i lenei itulau.
|
Pulea Meafaigaluega |
Voltage |
VA uta |
Galulue Vevela |
Humidity (Non- Condensing) |
|
PREHEAT-X |
18-30 | 18 | -22°F i le 158°F*
-30ºC to 70ºC* |
0-95% RH |
|
Ulufale mai |
Resistive Inputs require 10KΩ
Type III Thermistor |
|||
| 24 VAC Inputs provide 4.7KΩ
uta |
||||
| Galuega Fa'atino | Fa'asologa o Galuega: 1 amp maualuga i le gaosiga. | |||
Table 1: PREHEAT-X Electrical and Environmental Requirements
FAAMANATU: If the temperature at the PREHEAT-X is below -22ºF (-30ºC), the display refresh rate could be less responsive.
LAPATAIGA: 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, and any associated module.
Please carefully read and apply the following information when wiring the AAON unit controller, PREHEAT-X and any associated module.
-
All wiring is to be in accordance with local and national electrical codes and specifications.
-
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.
-
Minimum wire size for 24 VAC wiring should be 18- gauge.
- Minimum wire size for all sensors should be 24-gauge. Some sensors require two-conductor wire and some require three-or four-conductor wire.
- Minimum wire size for 24 VAC thermostat wiring should be 22-gauge.
- 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.
- 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.
- Before applying power to the AAON unit controller, PREHEAT-X, and any associated modules, be sure to recheck all wiring connections and terminations thoroughly.
Malosiaga i Luga
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.
Uea fa'aoga
Ulufale mai
The PREHEAT-X works as a stand-alone module or comm-unicating with the VCCX2 or other AAON unit controllers. For connection to the PREHEAT-X 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.
Uea o mea e fai
Galuega Fa'atino
The PREHEAT-X works as a stand-alone module or communicating with the VCCX2 or other AAON unit controllers. For connection to the PREHEAT-X, use an E-BUS Cable connecting to the appropriate E-BUS ports. See Figure 3, this page for the Outputs Wiring.
FA'AIGA MA FA'AALIGA
Analog and Binary Inputs, Analog Outputs and Relays
| Faʻaaigoa Faʻamatalaga | |
| 1 | Leaving Air Temperature 1 (LAT1) |
| 2 | Leaving Air Temperature 2 (LAT2) |
| 3 | Entering Air Temperature Sensor |
| 4 | Reset In (0-10 VDC) |
| Binary Inputs | |
| 1 | Fa'aafi le vevela |
| 2 | Tapuni Faalavelave |
| 3 | Le lumanaʻi faʻaaogaina |
| Tulaga Fa'atusa | |
| 1 | 0-10 VDC Mod SCR |
| 2 | PWM SSR |
| Relay | |
| 1 | Alalaga |
| 2 | Vevela 1 |
| 3 | Vevela 2 |
| 4 | Vevela 3 |
| 5 | Vevela 4 |
| 6 | Vevela 5 |
| 7 | Vevela 6 |
Table 2: PREHEAT-X Inputs and Outputs
I/O Faafanua
See Table 2, this page to reference the inputs and outputs that are available on the PREHEAT-X.
Faʻaaigoa Faʻamatalaga
- Leaving Air Temperature 1 (LAT1)
When enabled, the PREHEAT-X will control to a Leaving Air Temperature (LAT) setpoint. The PREHEAT-X 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 will control to 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. - Ulufale i le vevela o le ea
When the Entering Air Temperature falls below the Entering Air Temperature Setpoint, preheat will be enabled.
FAAMANATU: 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 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.
Binary Inputs
- Heat Enable Contact (HEAT EN)
This input is only required when the PREHEAT-X is used as stand-alone module; 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. 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. - Fa'alavelave Fa'afuase'i Fa'auiga
This wet contact (24 VAC) input is used to initiate shutdown of the HVAC unit when a N.C. Smoke Detector (by others), Firestat (by others), or other shutdown condition (by others) occurs and the contact is opened. The PREHEAT-X remains active and can initiate alarm relays.
Tulaga Fa'atusa
- 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.
Moligafua Galuega Faatino
- Relay #1 – Alarm
This relay sends a signal when an alarm is enabled. - Relays #2 – 7
These relays are Fixed Stage Heat Outputs.
Faʻasologa o Faagaioiga
Faiga Fa'atino
The PREHEAT-X can be used as a stand-alone module or communicating with an AAON unit controller using a modular cable.
Faiga Tuto'atasi
When used in Stand-Alone Mode, the PREHEAT-X will modulate SCR or SSR Heat and stage any additional fixed stages to maintain the Leaving Air Temperature Setpoint configured on the PREHEAT-X LCD display. The PREHEAT-X is activated by a 24 VAC signal to the HEAT EN input.
Faiga Feso'ota'iga
- When the PREHEAT-X is connected and communicating with an AAON unit controller via a modular cable, the necessary information will be passed between the PREHEAT-X and the AAON unit controller to properly operate in the Heating Mode.
- If the communication is interrupted between the PREHEAT-X and the AAON unit controller, both boards will show an alarm and the PREHEAT-X 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 Sepoints are set using the main AAON unit controller.
Fa'avevela Fa'agaoi
Faiga Tuto'atasi
Enabled when the Binary Input 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, whichever occurs first.
Leaving Air Sensor
The PREHEAT-X 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 which averages LAT1 and LAT2
Leaving Air Setpoint
Tuto'atasi
- Leaving Air Temperature Setpoint can be reset between the LAT Setpoint and LAT Setpoint Reset Limit.
- The Reset Source is based on a 0-10 VDC input and range can be adjusted using the LAT Setpoint Reset Source Low and LAT 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.
Fa'atulagaina o le Vevela
- If configured, the Modulating Heat Output will be used as the first stagu o le vevela.
- Analog Voltage Output can be adjusted between 0-10 VDC as needed to maintain the Leaving Air Setpoint.
- Controlled by an Internal PID Loop.
Vevela Staging 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 LAT must be below the LAT Setpoint by any amount.
- If Mod Heat is configured, it must be at 100% for the Stage Up Delay.
- The Minimum Off Time must be met.
- O le S.tage Up Delay must be met (for second stage and above).
Vevela Staging Down
The following conditions must be met before a stage of heat can be de-energized:
- Preheat Enable Signal/Command is deactivated -ORthe LAT must be above the LAT Setpoint by the LAT Deadband.
- If Modulating Heat is configured, it must be at 0% for the Stage Down Delay.
- The Minimum Run Time must be met.
- O le S.tage Down Time must be met.
Tapuni Faalavelave
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 LAT High Temperature 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 LAT Low Temperature Alarm Limit for more than two minutes, the heat will remain on but an alarm will be generated.
LCD SCREENS
Navigation Ki
LCD Display Screen & Navigation Keys
O fa'aaliga fa'aaliga LCD ma fa'amau e fa'atagaina oe view status and alarms, and enable force modes. See Figure 4, this page and refer to Table 3 and 4, this page for descriptions.
LCD SCREENS
Main Screens Map
Ata Autu
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 <MENU> button.
- Tusitala
to scroll through PREHEAT-X Screens. - Tusitala
to go to STATUS Screens.
- Tusitala to scroll through STATUS Screens.
- Tusitala to go to SETPOINTS Screens.
- Tusitalato scroll through SETPOINTS Screens.
- Tusitala to go to ALARMS Screens.
- Tusitala to scroll through ALARMS Screens.
- Tusitala to go to CONFIG Screens.
- Tusitala to scroll through CONFIG Screens.
- Tusitala to go to COMM CONFIG Screens.
- Tusitala to scroll through COMM CONFIG Screens.
Mata o le tulaga
Refer to the following map when navigating through the Status Screens. From the STATUS Screen, press <ENTER> to scroll through the screens.
Setpoint Screens
Refer to the following map when navigating through the Setpoint Screens. From the SETPOINTS Screen, press <ENTER> to scroll through the screens and change setpoints. Use the <UP> and <DOWN> arrow keys to change your selections. Then press <ENTER> to save the new setpoint.
FAAMANATU: 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.
LEAVING AIR TEMPERATURE SETPOINT
Will display only in Stand-Alone Mode. This is the target temperature while the heating is enabled. If you are using the reset signal, this is the setpoint it will calculate to at zero volts.
| Laiti | Fa'atonu | maualuga |
| 0ºF | 70ºF | 90ºF |
| -17.7ºC | 21ºC | 32ºC |
RESET LIMIT SETPOINT
Will display and be used only in Stand-Alone Mode. If Remote Reset is being utilized, this will be the Leaving Air Setpoint when the Reset Voltage Input is at 10 VDC.
| Laiti | Fa'atonu | maualuga |
| 0ºF | 70ºF | 120ºF |
| -17.7ºC | 21ºC | 48.8ºC |
ENTERING AIR SETPOINT
This is the temperature at which Preheat is enabled. The Entering Air Enable Setpoint is set by the LCD display in Stand-Alone Mode and is set by the AAON unit controller in Communications Mode.
| Laiti | Fa'atonu | maualuga |
| -40ºF | 55ºF | 90ºF |
| -40ºC | 12.7ºC | 32ºC |
LEAVING AIR SENSOR 1 CALIBRATION OFFSET
If the sensor is reading incorrectly, you can use this screen to enter an offset temperature to adjust the sensor’s temperature.
| Laiti | Fa'atonu | maualuga |
| -100ºF | 0ºF | 100ºF |
| -55.5ºC | 0ºC | 55.5ºC |
LEAVING AIR SENSOR 2 CALIBRATION OFFSET
If the sensor is reading incorrectly, you can use this screen to enter an offset temperature to adjust the sensor’s temperature.
| Laiti | Fa'atonu | maualuga |
| -100ºF | 0ºF | 100ºF |
| -55.5ºC | 0ºC | 55.5ºC |
ENTERING AIR SENSOR CALIBRATION OFFSET
If the sensor is reading incorrectly, you can use this screen to enter an offset temperature to adjust the sensor’s temperature.
| Laiti | Fa'atonu | maualuga |
| -100ºF | 0ºF | 100ºF |
| -55.5ºC | 0ºC | 55.5ºC |
Mata Fa'ailoga
- Refer to the following map when viewing the ALARMS Screens. These screens will display automatically when alarms are present. For alarm troubleshooting, see pages 22-23.
FUAFUAGA
The alarms are as follows:
- NO ALARMS: 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 which is activated if the Controlling Leaving Air Temperature has dropped below 35ºF for more than two minutes. The alarm will be disabled if after a fixed delay period the Leaving Air Temperature has risen above 35ºF.
- 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 stagu ese.
- 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.
Fa'ailoga Mata
- Refer to the following map when navigating through the Configuration Screens. From the CONFIG Screen, press <ENTER> to scroll through the screens and change setpoints. Use the <UP> and <DOWN> arrow keys to change your selections. Press <ENTER> to save any changes.
LCD SCREENS
Communication Configuration Screens
- Refer to the following map when navigating through the Communication Configuration Screens. From the COMM CONFIG Screen, press <ENTER> to scroll through the screens and change setpoints. Use the <UP> and <DOWN> arrow keys to change your selections. Press <ENTER> to save any changes.
FOFOGAIGA
lautele
The PREHEAT-X 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:
- TULAGA LEDs
POWER – This green LED will light up to indicate that 24 VAC power has been applied to the controller. - Su'esu'ega LED
ALARM – This red LED located on the PREHEAT-X’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.
LED Feso'ota'iga
COMM – This yellow LED will light up and blink when communications are detected.
La'u ta'avale
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.
- EMERGENCY SHUTDOWN – This green LED will light up when Emergency Shutdown input has 24 VAC applied to it.
Fa'aliga
Fa'afitauli Fa'alogo
Mechanical Failure:
- Check relay outputs on the PREHEAT-X for 24 VAC output.
- Fa'amaonia galuega faatino voltage (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.
- Verify Leaving Air Temperature Sensor probe(s) is mounted correctly.
- Remove AI1 and AI2 and GND wiring from the PREHEAT-X and ohm out the sensor (this may indicate open or failed wiring). Refer to chart in back of this guide for readings.
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.
- Remove AI1 and AI2 and GND wiring from the PREHEAT-X and ohm out the sensor (this may indicate open or failed wiring). Refer to chart in back of this guide for readings.
Communications Loss:
- Check COMM LED on PREHEAT-X.
- Verify 24 VAC power to all interconnected controllers.
- Verify connection between the PREHEAT-X and associated controllers.
- In Communications Mode (connected with a modular cable), verify PREHEAT-X configuration on controller.
Mounting the Leaving Air Temperature Sensor
- The Leaving Air Temperature (LAT) sensor should be located in the PREHEAT-X box’s output location.
- Locate the sensor in the center of the widest part of the PREHEAT-X 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.
LAPATAIGA:
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.
APPENDIX A: LAT SENSOR
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 voltage in 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.
Fa'atonuga o le su'ega o le Thermistor Sensor
- 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.
Fa'atonuga o le su'ega o le Thermistor Sensor
- Fa'aoga le koluma tetee e siaki ai le thermistor sensor a'o motusia mai mea fa'atonutonu (e le o fa'aola).
- Fa'aaoga le voltage koluma e siaki ai masini a'o fa'afeso'ota'i i fa'atonuga fa'aola. Faitau voltage fa'atasi le mita i luga ole DC volts. Tuu le ta'i “-” (minus) i luga o le laina GND ma le “+” (faaopoopo) i luga o le mea e fa'aoga ai masini o lo'o su'esu'eina.
| Temperature to Resistance/Voltagu Siata | |||||||
| Temp (°F) | Temp (°C) | Tete'e (Ohm) | Voltage @ Ulufale (VDC) | Temp (°F) | Temp (°C) | Tete'e (Ohm) | Voltage @ Ulufale (VDC) |
| -10 | -23.3 | 93333 | 2.98 | 72 | 22.2 | 11136 | 1.74 |
| -5 | -20.6 | 80531 | 2.94 | 73 | 22.8 | 10878 | 1.72 |
| 0 | -17.8 | 69822 | 2.89 | 74 | 23.3 | 10625 | 1.70 |
| 5 | -15 | 60552 | 2.83 | 75 | 23.9 | 10398 | 1.68 |
| 10 | -12.2 | 52500 | 2.77 | 76 | 24.4 | 10158 | 1.66 |
| 15 | -9.4 | 45902 | 2.71 | 78 | 25.6 | 9711 | 1.63 |
| 20 | -6.6 | 40147 | 2.64 | 80 | 26.7 | 9302 | 1.59 |
| 25 | -3.9 | 35165 | 2.57 | 82 | 27.8 | 8893 | 1.55 |
| 30 | -1.1 | 30805 | 2.49 | 84 | 28.9 | 8514 | 1.52 |
| 35 | 1.7 | 27140 | 2.41 | 86 | 30 | 8153 | 1.48 |
| 40 | 4.4 | 23874 | 2.33 | 88 | 31.1 | 7805 | 1.45 |
| 45 | 7.2 | 21094 | 2.24 | 90 | 32.2 | 7472 | 1.41 |
| 50 | 10 | 18655 | 2.15 | 95 | 35 | 6716 | 1.33 |
| 52 | 11.1 | 17799 | 2.11 | 100 | 37.8 | 6047 | 1.24 |
| 54 | 12.2 | 16956 | 2.08 | 105 | 40.6 | 5453 | 1.16 |
| 56 | 13.3 | 16164 | 2.04 | 110 | 43.3 | 4923 | 1.09 |
| 58 | 14.4 | 15385 | 2.00 | 115 | 46.1 | 4449 | 1.02 |
| 60 | 15.6 | 14681 | 1.96 | 120 | 48.9 | 4030 | .95 |
| 62 | 16.7 | 14014 | 1.93 | 125 | 51.7 | 3656 | .88 |
| 64 | 17.8 | 13382 | 1.89 | 130 | 54.4 | 3317 | .82 |
| 66 | 18.9 | 12758 | 1.85 | 135 | 57.2 | 3015 | .76 |
| 68 | 20 | 12191 | 1.81 | 140 | 60 | 2743 | .71 |
| 69 | 20.6 | 11906 | 1.79 | 145 | 62.7 | 2502 | .66 |
| 70 | 21.1 | 11652 | 1.78 | 150 | 65.6 | 2288 | .61 |
| 71 | 21.7 | 11379 | 1.76 | ||||
Fa'aaliga: Afai o le voltage is above 3.3 VDC, the sensor or wiring is “open.” If the voltage is less than 0.05 VDC, the sensor or wiring is shorted.
Laulau 5: 0-3V Temperature Sensor - Voltage & Resistance for Type III Sensors
APPENDIX B: BACnet®
Connection to MS/TP Network
| FAAMATALAGA | PARAMETER | FAAMATALAGA | TULAGA | |
| AI: 1 | Active Controlling Setpoint | The current Active Controlling Setpoint | Faitau Na'o | |
| AI: 2 | Numera o le Vevela Stages On | The current number of heat stages on | Faitau Na'o | |
| AI: 3 | Modulating Output Position | The current Modulating Output Position | Faitau Na'o | |
| AI: 4 | All Alarms Bitfield | The current Alarm Status in a Bitfield | Read Only, see alarm bits, page 27 | |
| AI: 5 | Ulufale i le vevela o le ea | The current Entering Air Temperature | Faitau Na'o | |
| AI: 6 | Leaving Air Temp Sensor 1 | The current Leaving Air Sensor 1 Temperature | Faitau Na'o | |
| AI: 7 | Leaving Air Temp Sensor 2 | The current Leaving Air Sensor 2 Temperature | Faitau Na'o | |
| AI: 8 | Leaving Air Average Temp | The current Average Leaving Air Temperature | Faitau Na'o | |
| AI: 9 | Reset Input Percentage | The current Setpoint Reset Input Percentage | Faitau Na'o | |
| BI: 1 | Enable Input Value | The current value of the Enable Binary Input | Read Only, 0 = Off, 1 = On | |
| BI: 2 | Shutdown Input Value | The current value of the Emergency Shutdown Binary Input | Read Only, 0 = Off, 1 = On | |
| BI: 3 | Preheat Enable Status | The current Enable status of the controller | Read Only, 0 = Off, 1 = On | |
| BI: 4 | Alarm Relay Status | The current status of the Alarm Relay | Read Only, 0 = Off, 1 = On | |
| BI: 5 | Heat 1 Relay Status | The current status of the Heat 1 Relay | Read Only, 0 = Off, 1 = On | |
| BI: 6 | Heat 2 Relay Status | The current status of the Heat 2 Relay | Read Only, 0 = Off, 1 = On | |
| BI: 7 | Heat 3 Relay Status | The current status of the Heat 3 Relay | Read Only, 0 = Off, 1 = On | |
| BI: 8 | Heat 4 Relay Status | The current status of the Heat 4 Relay | Read Only, 0 = Off, 1 = On | |
| BI: 9 | Heat 5 Relay Status | The current status of the Heat 5 Relay | Read Only, 0 = Off, 1 = On | |
| BI: 10 | Heat 6 Relay Status | The current status of the Heat 6 Relay | Read Only, 0 = Off, 1 = On | |
| BI: 11 | Emergency Shutdown Alarm | The current Emergency Shutdown Alarm status | Read Only, 0 = Off, 1 = On | |
| BI: 12 | Leaving Air Sensor 1 Alarm | The current Leaving Air Sensor 1 Alarm status | Read Only, 0 = Off, 1 = On | |
| BI: 13 | Leaving Air Sensor 2 Alarm | The current Leaving Air Sensor 2 Alarm status | Read Only, 0 = Off, 1 = On | |
| BI: 14 | Low Leaving Air Temp Alarm | The current Low Leaving Air Temp Alarm status | Read Only, 0 = Off, 1 = On | |
| BI: 15 | High Leaving Air Temp Alarm | The current High Leaving Air Temp Alarm status | Read Only, 0 = Off, 1 = On | |
| BI: 16 | Entering Air Sensor Alarm | The current Entering Air Sensor Alarm status | Read Only, 0 = Off, 1 = On | |
|
AV: 1 |
Faʻafesoʻotaʻi maotua |
Enables the Preheat from the BACnet® front end |
Read / Write Volatile | |
| 0 = Fa'aletonu, 1 = Fa'asa | ||||
|
AV: 2 |
Remote Leaving Air Setpoint |
Controlling Leaving Air Setpoint from the BACnet® front end |
Read/ Write Volatile | |
| 35.0ºF | 90.0ºF | |||
|
AV: 3 |
Remote Entering Air Setpoint |
Entering Air Enable Setpoint from the BACnet® front end |
Read / Write Volatile | |
| -40.0 ºF | 90.0ºF | |||
PREHEAT-X BACnet® Property Identifier
BACNETPropertyIdentifier : AllAlarmGroup1Bits ::= BIT STRING {
- Reserved (0),
- BadLeavingAir1 (1),
- BadLeavingAir2 (2),
- LowLeavingAir (3),
- HighLeavingAir (4),
- Reserved (5),
- BadEnteringAir (6),
- CommAlarm (7),
- ShutDownAlarm (8)
PREHEAT-X Technical Guide G086640 · Rev. F · 240202
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2425 South Yukon Ave • Tulsa, OK • 74107-2728
- Ph: 918-583-2266 • Fax: 918-583-6094
- AAON P/N: G086640, Rev. F
- Printed in the USA • Copyright February 2024 • All Rights Reserved
FAQs
Pepa / Punaoa
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AAON PREHEAT-X Series Module Controller [pdf] Taiala mo Tagata Fa'aoga VCCX-IP Controller, VCCX2 Controller, VCB-X Controller, VCM-X E-BUS Controller, ASM01688, ASM07424, ASM01698, ASM01862, PREHEAT-X Series Module Controller, PREHEAT-X Series, Module Controller, Controller |