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INSTRUCTIONS Commissioning guide for AHC-3000

14.9 Configuring the supply air: single-duct supply air system

Supply air AHU

If the AHU is a single fan/single duct supply air unit, it is
possible to configure a recirculation unit using a mixing
damper.

Here, you now select the mixing damper.

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Содержание AHC-3000

Страница 1: ...67793A 10 18 OSH 2018 OJ Electronics A S INSTRUCTIONS Commissioning guide for AHC 3000 AHC 3000 CONTROL SYSTEM FOR COMPACT AIR HANDLING UNITS ...

Страница 2: ...14 13 6 Cloud activation status and settings 14 14 Configuring the Application 15 14 1 Configuring the AHU type 15 14 2 Configuring the temperature sensors 16 14 3 Configuring the filters 17 14 4 Configuring the pressure transmitters for flow and deicing 18 14 5 Configuring the visualisation of the current power 19 14 6 Configuring the fan alarm 20 14 7 Configuring the heating 21 14 8 Configuring ...

Страница 3: ...erature control settings 40 20 1 Temperature control loop settings 41 20 2 Heating coil settings water coil 42 20 3 Heating coil settings electric coil 1 43 20 4 Cooling coil settings water cooling coil 44 20 5 Cross flow heat exchanger settings 45 20 6 Counter flow heat exchanger settings 46 20 7 Rotary heat exchanger settings 47 20 8 Summer night cooling free cooling 48 21 Operation time schedul...

Страница 4: ...ergy consumption It is crucial that anyone who is in contact with the ACH 3000 system manufacturers installers service technicians and system integrators must read this commissioning guide thoroughly before starting to commission the AHC 3000 For the manufacturer The AHC 3000 has been developed with the aim of making the AHU controller set up as easy and user friendly as possible The AHC 3000 has ...

Страница 5: ...o use Fig 2 Boost mode At least 1 A alarm is active AHU in stop At least 1 B alarm is active Rest time is displayed Current temperature Current temperature Current temperature Current humidity AHU in low speed Current humidity Current humidity Current temperature Current humidity 2 1 Lost connection to the HMI 35 touch display If the display continuously show Lost communication _ Check the connect...

Страница 6: ... 1 1 1 1 Installer password 1 1 1 2 The password expires in 60 minutes without operation 5 Selecting the language in the HMI To start with we suggest that you select your preferred language Enter the menu level via the Menu in the upper right corner of the home screen From here select Settings Fig 4 3 Available languages see fig 4 3 _ English _ Française _ Deutsch _ Dansk _ Svenska _ Norsk _ Suomi...

Страница 7: ...et change the current Time and Date select the parameter date month year that you want to change by marking the current value field see Fig no 6 2 and use the up and down buttons to make your individual adjustment for date month and year Repeat this procedure for the current time Auto daylight saving Select Daylight saving time On Daylight saving will be activated according to the local daylight s...

Страница 8: ...press Back Your selection is automatically saved in the controller after selection 8 Fire settings The AHC 3000 supports two different kinds of fire alarm Fire alarm detected from a fire thermostat or an automatic fire detection system AFD Internal fire alarm detected from the internal supply air and extract air temperature sensors Temperature units C Degrees Centigrade F Degrees Fahrenheit Air fl...

Страница 9: ... temperature sensors in the AHU to detect a fire alarm If the current value of the Supply temperature or Extract temperature is beyond the setpoint see fig 8 3 the AHU will go into fire alarm mode and emit a fire alarm A alarm This fire alarm will stop the fans 9 Balancing This function allows the installer to maintain a constant fan speed during the air distribution adjustment of for instance the...

Страница 10: ...the SW in the AHC 3000 controller either power off the controller for at least ten seconds or press _ The update progress can be followed on the HMI 35T If the software update includes a new HMI software version the HMI display will flash for about thirty seconds while the update is in progress Note When the update button is activated the AHU will go into operating mode Service stop _ When the new...

Страница 11: ...room temperature Only displayed if a room sensor OJ Air HMI 20T is installed and configured Current value on all measured air flow in the AHU The current value is displayed if a pressure transmitter is installed across the fans Current filter pressure drop on all measured filters in the AHU The current pressure Pa will be displayed if a pressure transmitter is installed across the filters 12 Alarm...

Страница 12: ... up The AHC 3000 can communicate on a BMS system via Modbus TCP IP and Modbus RTU see 13 1 Directly connected to a computer via a LAN cable RJ45 see 13 2 The AHC 3000 can also be connected to the OJ Cloud via the internet or a mobile app via Bluetooth 13 1 Modbus TCP IP DHCP If the AHC 3000 is connected to a local area network LAN with a DHCP server select Dynamic IP under the menu Static Dynamic ...

Страница 13: ...ttings on your computer to the settings on the AHC 3000 If the local IT department has reserved a specific fixed IP address for the AHC 3000 also select Static IP After selecting Static IP specify the correct communication settings such as IP Address Gateway Primary and Secondary DNS You will receive this information from the local IT department 13 3 MAC address MAC address is a static number issu...

Страница 14: ... Bluetooth device smartphone tablet or similar The AHC 3000 B will now appear on the list of Bluetooth devices Select Connect on your Bluetooth device 13 6 Cloud activation status and settings To permanently connect the AHU to the OJ Cloud use the type ACH 3000 T and connect it to the Internet see index 13 1 13 2 Password protection Select password protection On Off Internet status Status on the I...

Страница 15: ...ote Find more information for OJ Air Cloud on https oj hvac cloud com 14 Configuring the application Now we will start to configure the application First select the AHU type from among these main categories Note The AHC 3000 must be in the operational mode Service stop _ 1 Rotor heat exchanger 2 Counter flow heat exchanger 3 Cross flow heat exchanger 4 Mixing 5 Supply 6 Extract Note If you use the...

Страница 16: ...Configuring the temperature sensors Here select the temperature sensors in the AHU from among these options PT 1000 NTC 12K Supply air temperature Outdoor air temperature Exhaust air temperature Extract air temperature Water temperature factory setting All air temperature sensors are pre selected from the factory Only the water temperature is auto selected if a water heating battery is configured ...

Страница 17: ... these options It is possible to configure up to 2 filters in an AHU Outdoor air filter Extract air filter Filter alarm Filter alarm function can be selected as Timer function Filter switch via digital input Static filter alarm via pressure transmitter Dynamic filter alarm via pressure transmitter Filter alarm settings are made under Commissioning ...

Страница 18: ...ured flow deicing pressure transmitters Supply flow Exhaust flow Pressure de icing These 3 pressure transmitters are all auto mounted via Modbus communication and this window is a visualisation only The connected pressure transmitters are for measuring the flow of the fans and the pressure drop over the heat exchanger only cross flow and counter flow heat exchanger ...

Страница 19: ...and visualisation of the current power Here you see the autoconfigured drives which can display the current power consumption Rotor Supply fan Exhaust fan These three power components are all auto mounted via modbus communication and this window is only a visualisation of the connected power components ...

Страница 20: ...or as Digital input The Tacho alarm is detected on a digital input from a pulsating Tacho signal from the motor When this pulsating Tacho signal stops and the motor should actually be running the system will emit an alarm The digital input is also detected on a digital input from either the alarm relay on the motor drives or over current alarm relay When this digital alarm signal contact is closed...

Страница 21: ...ulation pump and frost protection of the heating battery is automatic selected The default setting for frost protection is through the temperature sensor on the return water The return water sensor can be deselected under the menu Temperature Frost protection settings are made on the Commissioning menu Frost protection is also available through a capillary tube alarm frost thermostat To set frost ...

Страница 22: ...ilities No after cooling Water heating coil factory setting The AHU must be in the operational mode Service stop _ from main screen menu in order to activate the new updated software Note When Water cooling is selected the digital output for circulation pump is automatically selected Warning Frost protection must use antifreeze liquid in the water cooling battery Note ...

Страница 23: ...uide for AHC 3000 14 9 Configuring the supply air single duct supply air system Supply air AHU If the AHU is a single fan single duct supply air unit it is possible to configure a recirculation unit using a mixing damper Here you now select the mixing damper ...

Страница 24: ... as soon as a pressure transmitter VOC sensor humidity sensor or HMI 20T room display has been detected on the Modbus the sensor and the including function will be activated Example 1 An HMI 20T is connected to the Modbus port via the RJ12 port marked A As soon as the HMI 20T is detected on the Modbus the functions Room temperature Timer button Remote set point will automatically be selected Examp...

Страница 25: ...op _ After 10 seconds the scan of the Modbus will be completed and the Autoconfiguration button can be released again The AHU will remain in operational mode Service stop until a different operational mode is selected After Autoconfiguration it is now time to select the AHU type see index 14 2 The Auto configure function will now start a system scan All components on the Modbus OJ DV and DRHX driv...

Страница 26: ...t water available Summer Open Din Cold water available Start External start signal AHU will start when the digital input is closed Boost speed External boost signal Activation will start the AHU in boost speed high speed AHU will boost as long as the digital input is closed Smoke stop Signal from a smoke detector will stop the AHU The alarm will stop the AHU and appear as Smoke alarm Alarm Open Di...

Страница 27: ...not possible in operational mode Stop o Heat recovery o Heating coil o Cooling coil o Sensor current value and sensor correction 18 1 Commissioning the fans Fans status Settings Override On Off Status Current speed Current fan pressure Status start relay Fans override Activate the Override function The timer is started and the running time is 8 hours De activate the Override function to stop and r...

Страница 28: ... Current 0 10V output heat recovery Current supply air temperature Heat recovery override Activate the Override function by pushing the switch to the right Timer is started and the running time is 8 hours De activate the Override function by pushing the switch to the left to stop and reset the timer Settings Current recovery open Status Current 0 10V heating output Current supply air temp C F ...

Страница 29: ...ent status of the heating relay Current supply air temp C F Heater override Activate the Override function by pushing the switch to the right This starts the timer and the running time is 8 hours De activate the Override function by pushing the switch to the left to stop and reset the timer Settings Current heating open Status Current 0 10V heating output Current status of the heating relay Curren...

Страница 30: ...ooling coil Current supply air temp C F Cooler override Activate the Override function by pushing the switch to the right This starts the timer and the running time is 8 hours De activate the Override function by pushing the switch to the left to stop and reset the timer Settings Set cooling override Status Current 0 10V cooling output Status of cooling relays 1 2 3 Current supply air temperature ...

Страница 31: ...sensors Read out all connected temperature sensors Set the sensor correction 3 5 C to 3 5 C Sensor correction is an option for adjusting the temperature displayed on the sensor in the AHC 3000 system so that it will show the same value as the temperature measured by an external thermometer Scroll Down for more temperature sensors ...

Страница 32: ...2 sensors CO2 sensors Read out the current value on the connected CO2 sensor Current input on the 0 10V analogue input 18 7 Commissioning the humidity sensors Extract air humidity sensor Read out the current value on the connected humidity sensor HTH 6202 Modbus sensor o Current extract air humidity ...

Страница 33: ...ow speed Pressure setpoint Medium speed Pressure setpoint High speed Pressure setpoint Airflow current value Min air volume min flow setpoint Max air volume max flow setpoint Fan pressure current value Supply air duct current value Energy consumption current value only OJ DV K factor l s Delayed start time setpoint Setpoints can be changed by touching the blue setpoint values and changing the valu...

Страница 34: ...et the control parameters for the selected control mode Low speed flow setpoint Medium speed flow setpoint High speed flow setpoint Airflow flow current value Fan pressure current value Supply air duct current value Energy consumption current value only OJ DV K factor l s Delayed start setpoint Setpoints can be changed by touching the blue setpoint values and changing the value via the setpoint ke...

Страница 35: ...r fan Fan speed current fan speed Fan pressure current fan pressure only displayed if the pressure is measured Airflow current fan pressure only displayed if the pressure is measured Exhaust air duct current duct pressure only displayed if the pressure is measured K factor l s Min air volume min flow setpoint only displayed if the pressure is measured Max air volume min flow setpoint only displaye...

Страница 36: ...an Fan speed current fan speed Fan pressure current fan pressure only displayed if the pressure is measured Airflow current fan pressure only displayed if the pressure is measured Exhaust air duct current duct pressure only displayed if the pressure is measured K factor l s Min air volume min flow setpoint only displayed if the pressure is measured Max air volume min flow setpoint only displayed i...

Страница 37: ...tract air fan in this sample only supply air fan is shown Low speed setpoint Medium speed setpoint High speed setpoint Airflow current value Fan pressure current value Supply air duct current value Energy consumption current value only OJ DV K factor l s Delayed start setpoint Setpoints can be changed by touching the blue setpoint values and changing the values via the setpoint keyboard Save exit ...

Страница 38: ...hand terminal or the HMI 20T room panel display the AHU will go into Boost speed On this menu you select the speed that the AHU will take in boost mode The boost mode is active until the timer in the HMI 35T hand held terminal or the HMI 20T room panel display runs out of time or the digital input DI6 for high speed is opened Supply air Select the volume or the speed on the supply air fan The setp...

Страница 39: ...ually via the 0 CALIBRATE PRESSURE button Auto 0 calibration The 0 calibration will be made every time the AHU is in Stop Either the stop signal is made manually from the user interface HMI 35 T or the AHU is stopped via a signal from the time scheduler When the AHU is stopped and the pressure transmitters do not measure any turbulence in the pressure tubes the 0 calibration will start Manual 0 ca...

Страница 40: ...rature setpoint is set from the HMI main screen display Constant extract air o Temperature is controlled in relation to constant extract air temperature measured by the extract air sensor located in the extract air duct o The required extract air temperature setpoint is set from the HMI main screen display Constant room o Temperature is controlled in relation to constant room air temperature measu...

Страница 41: ...ture control sequence Fault on the sensor Output will take half of the fault on the P band as a here and now reaction The velocity of the second half of the P band will be cut in or cut out using the I time The calculation and recalculation of the fault are on going calculations If the temperature oscillates more than is acceptable the first thing to change is the P band and or the I time A higher...

Страница 42: ...g valve stops when the start up sequence is completed and the inlet fan has reached its air volume setpoint Frost protection During normal operation of the AHU the return sensor on the heating coil will ensure that the return flow from the water coil does not fall below the set value in this parameter Standby heating When the AHU is in stop standby mode the return sensor on the heating coil will e...

Страница 43: ...00 Reduced heating Current status on the reduced heating function YES If the heating has been reduced because the supply air flow is lower than the set value NO If the heating is not reduced 0 heat power Fan speed setpoint of the max AHU volume for supply air the heating must be off 0 If the air flow is below the value of this setpoint the heat power is forced Off 100 heat power Setpoint for the m...

Страница 44: ...l Available settings Setpoint Current setpoint for the current temperature control mode Setting range 0 0 40 0 C Current Current supply air temperature Cooling Current status value of the cooling valve range 0 100 Supply air flow Current supply air flow m3 h Cooling relay Current status of the cooling relay Open Closed ...

Страница 45: ... the set value P band the bypass damper will override modulating to 100 open As a result the outdoor air bypasses the heat exchanger and exhaust air from the room and passes through the heat exchanger Due to the relatively high room temperature this function will lead to thawing of the ice coating on the heat exchanger Ice protection P band At temperatures below the set value set value in the para...

Страница 46: ... the set value P band the bypass damper will override modulating to 100 open As a result the outdoor air bypasses the heat exchanger and exhaust air from the room and passes through the heat exchanger Due to the relatively high room temperature this function will lead to the thawing of the ice coating on the heat exchanger Ice protection P band At temperatures below the set value set value in the ...

Страница 47: ...or AHC 3000 20 7 Rotary heat exchanger settings Available settings Heat recovery Current heat recovery setpoint Motor revolution Current motor speed rpm only DRHX Motor current Current motor current mA only DRHX Operating time Current operating time Days only DRHX ...

Страница 48: ...start at a lower outdoor temperature Min supply Minimum supply temperature when summer night cooling is active The heat exchanger is used to ensure a minimum supply temperature Start time Earliest time when summer night cooling starts Setting range 8 pm 2 am If the system is not configured with a room sensor but only with an extract sensor it will start at the set time in order to check room tempe...

Страница 49: ...m is stopped outside the configured operating periods Frost protection of heating coils remains active and the pump and valve motioning also remain active o Summer night cooling will be active and the function will start the system if the preconditions for doing so are fulfilled o The system can be started manually via the start signal High speed boost speed The properties should be configured fir...

Страница 50: ...2017 31 December 2019 Outside this period the AHU will run according to the selected fall back speed 2 Outside this period the selected operating mode as configured under Fan speed will be active Here we have selected Fan speed Operation mode Extended stop see previous page Outside the selected active period for daily schedule and when no timer scheduler is active the AHU will go into this operati...

Страница 51: ...r changing the operating mode select the operating mode that the AHU will take at this selected time In our example the switching time at which the system will change its status on Mondays Start at medium speed at 6 00 am Change to high speed at 12 00 noon Change to extended stop at 4 00 pm fall back speed as selected on previous page Start making the first Event The first event on Monday is to st...

Страница 52: ...r Monday will be copied to selected days Note Copying functionality If there are individual days that are not going to have the same operating pattern even though you have used the copying functionality these days can subsequently be individually changed 1 Select Daily schedule 2 Select the daily schedule day that will be used as copy from Check that the events are correctly scheduled 3 Press the ...

Страница 53: ...tional holidays and other extraordinary closing days Days that are an exception from the normal operation schedule Days the building is closed and empty During these closing days the AHU will keep an eye on the room or building and start up if necessary e g if the room temperature exceeds the summer night cooling setpoint 1 Select Exceptions 2 Select Exception 1 3 Press Add event to create the fir...

Страница 54: ...1 must be active Example 1 5 June is a public holiday a national closing day day programming 2 1 week of holiday in week 7 week programming 3 2 weeks of holiday from 16 July to 29 July period programming Activate Exception 1 on a single active day 1 Select Add 4 and select the date Leave and save by pressing on The programmed activity is now visible on the overview It is possible to make more sing...

Страница 55: ...y is now visible on the overview It is possible to make more single week periods Select Add 4 and select more days of activation Activate Exception 1 in a free selectable period 1 Select Add 4 and select the week 2 weeks of holiday starts on 16 July and ends on 29 July 2018 Leave and save by pressing on The programmed activity is now visible on the overview It is possible to make more freely selec...

Страница 56: ...ark belonging to OJ Electronics A S 2018 OJ Electronics A S OJ Electronics A S Stenager 13B DK 6400 Sønderborg Tel 45 73 12 13 14 Fax 45 73 12 13 13 oj ojelectronics com www ojelectronics com 56 INSTRUCTIONS Commissioning guide for AHC 3000 ...

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