Download
Share
Print this page
  1. Manuals
  2. Brands
  3. Oxygen 8 Manuals
  4. Fan
  5. NOVA Series
  6. Operation & maintenance manual

Oxygen 8 NOVA Series Operation & Maintenance Manual

Hide thumbs Also See for NOVA Series:

Advertisement

Quick Links

Download this manual
1
NOVA
Operations & Maintenance
Nova Operations & Maintenance Manual

Advertisement

loading
Need help?

Need help?

Do you have a question about the NOVA Series and is the answer not in the manual?

Questions and answers

Related Manuals for Oxygen 8 NOVA Series

Summary of Contents for Oxygen 8 NOVA Series

  • Page 1 NOVA Operations & Maintenance Nova Operations & Maintenance Manual...
  • Page 2 TABLE OF CONTENTS 1. General Information 6.6 Fuse Replacement 2. Configuration Chart 6.7 Control Unit Status Display 3. Specifications 6.8 Configuration Screens 6.8.1 Fan Configuration 3.1 System Overview 6.8.2 Fan Settings 3.2 General Specifications 6.8.3 Preheat & Post Heat Configuration 3.3 Electrical DOAS/ERV 6.8.4 Coil Configuration...
  • Page 3 1.0 GENERAL INFORMATION This manual includes important instructions for safe connection of the Energy Recovery Caution: This sign indicates Ventilator (ERV). Before connecting the apotentially hazardous unit, please read carefully and follow situation, which may result the instructions. in minor or moderate injury if not avoided.
  • Page 4 2.0 CONFIGURATION CHART The following is a complete description of the packaged model numbers and nomenclature. Main Code: 1A (Optional) NOVA_XXX_XXX_X_X_X_X_XX_X_XX_XX_ 3A (Optional) XX_XX_XXX_XX_XX_X_X_X NOVA_A16_ERV_B_I_R_H_S1_ND_01_02_3 A_04_2401_13_08_2_1_A Sales Drawings: 2A (Optional) NOVA_A16_ERV_B_I_R_H_S1_ND_01_02_3 A_04_A 4A (Optional) Size A16, A18, B20, C20, C22, C24, C26, C30, C32, C40, C48, C58, C70 Heat Exchanger Latent - ERV...
  • Page 5 Upper Outlet Air Connection Straight - 01 Perpendicular - 1A - Not available with outdoor units Straight-Coupled Coil - 1B - Not available with S2 Lower Outlet Air Connection Straight - 01 Perpendicular - 1A - Not available with outdoor or vertical Straight-Coupled Coil - 2B - Not available for outdoor or S1 Downshot - 4D - Not available for indoor units...
  • Page 6 3.0 SPECIFICATIONS 3.1 System Overview Standard units come complete with energy recovery option, EC fans, 2” filters, fully integrated controls and casing as outlined in the spec below. 3.2 General Specifications Options Standard Features Integrated Heating and Cooling Certification Hydronic, Electric, DX Coils (using EEV kit) AHRI and UL Certified and pre-heat available Casing...
  • Page 7 3.3 Electrical DOAS/ERV MOTOR SA FAN UNIT SCCR SIZE AIRFLOW NOM. V PHASES MOP (A) (KW) (KA)* A16/A18 208/240 B20/B22 1300 208/240 0.78 B20/B22 1300 12.3 13.5 B20/B22 1300 C20/C22 2200 12.3 13.5 C20/C22 2200 C24/C26 2700 17.5 19.4 C24/C26 2700 11.7 13.1...
  • Page 8 3.4 Fan and Core Performance ERV Performance PD (SUPPLY, MODEL AIRFLOW (CFM) RETURN) 1" INSULATION / INDOOR UNITS 0.36, 0.72 0.62, 1.26 0.33, 0.55 1300 0.6, 1.05 0.33, 0.55 1300 0.6, 1.05 1550 0.45, 0.79 2700 0.86, 1.64 2000 0.45, 0.79 3500 0.87, 1.66 2"...
  • Page 9 Fan Data NOM. VOLTAGE/ MODEL FLA (A) SP “Wg FLA (A) A16/A18 208/1/30 / 1.8 A16/A18 240/1/60 / 1.8 B20/B22 1300 208/1/30 / 2.8 0.78 B20/B22 1300 240/1/60 / 2.8 0.78 B20/B22 1300 208/3/60 / 2.8 B20/B22 1300 460/3/60 / 2.8 C20/C22 2200 208/3/60 / 5.0...
  • Page 10 Air Performance A16 ― 775 cfm ― 240/1 B20 ― 775 cfm ― 240/1 B20 ― 1300 cfm ― 208/3 B20 ― 1300 cfm ― 460/3 C20 ― 1600 cfm ― 208/3 C20 ― 1600 cfm ― 460/3 Nova Operations & Maintenance Manual...
  • Page 11 Air Performance C24 ― 2700 cfm ― 208/3 C24 ― 2700 cfm ― 460/3 C30 ― 3500 cfm ― 208/3 C30 ― 3500 cfm ― 460/3 C40 ― 4400 cfm ― 208/3 C40 ― 4400 cfm ― 460/3 Nova Operations & Maintenance Manual...
  • Page 12 Air Performance C48 ― 5400 cfm ― 208/3 C48 ― 5400 cfm ― 460/3 C58 ― 6600 cfm ― 208/3 C58 ― 6600 cfm ― 460/3 C70 ― 8100 cfm ― 208/3 C70 ― 8800 cfm ― 460/3 Nova Operations & Maintenance Manual...
  • Page 13 3.5 Dimensions MODEL Y (HEIGHT) Z (DEPTH) C (DOOR CLEAR- (INDOOR (OUTDOOR ANCE) WIDTH) WIDTH) C20 - BYPASS C22 - BYPASS C26 - BYPASS C32 - BYPASS C40 - BYPASS C48 - BYPASS * All dimensions are in inches * If a unit has a baserail, add 4 inches to Y (OVERALL HEIGHT) Nova Operations &...
  • Page 14 4.0 CONFIGURING CONTROLS 4.1 Setting the Fan Operating Points Under the “Fan Configuration” and “Fan Settings” screens, you can set the way in which fans and air volumes are to be controlled and regulated. Fans and air volumes can be controlled according to the following operating modes.
  • Page 15 Nova Operations & Maintenance Manual...
  • Page 16 4.1.4 VOC/CO2 Control 4.1.1 Constant Air Volume • Supply and return fans are controlled in • The CO2 concentration in the room is controlled by regulating air volume via relation to flow/air volumes in the Supply and return ducts respectively. fan speed.
  • Page 17 4.2 Fan Control: Constant Air Volume Return Supply 1.20 Supply Air Fan Low Speed 1.10 Supply Air Fan Low Speed Set the required setpoint for return flow at Set the required setpoint for supply flow at “Low” speed “Low” speed 1.21 Supply Air Fan Mid Speed 1.11 Supply Air Fan Mid Speed Set the required setpoint for return flow at...
  • Page 18 4.3 Fan Control: Constant Pressure Return Slave Supply 1.31 Supply Air Fan Low Speed Set the required setpoint for Supply flow at “Low” speed 1.31 Supply Air Fan Mid Speed Set the required setpoint for Supply flow at “Medium” speed 1.33 Supply Air Fan High Speed Set the required setpoint for Supply flow at “High”...
  • Page 19 4.4 Fan Control: Constant CO2 The function is used to maintain a constant/ maximum CO2 level in a room or return duct. If the CO2 level is higher than the setpoint, return volume will be increased in a modulated fashion to “Return Air Fan High Speed”...
  • Page 20 4.5 Fan Control: Constant VOC The function is used to maintain a constant/ The function is used to maintain a constant/ maximum VOC level in a return duct. If the VOC level is higher than the setpoint, return volume will be increased in a modulated fashion “Return Air Fan High Speed”...
  • Page 21 4.6 Constant Pressure Both Fans The function is used to maintain pressure setpoints (VAV) at the Supply and Return ducts simultaneously. Set the desired pressure setpoints using parameters 1.31, 1.32 & 1.33 for the Supply Fan and 1.70, 1.71 & 1.72 for the Return Fan External 0-10V Control •...
  • Page 22 4.8 Cooling The function is only available if active cooling in the form of a cooling element is installed and configured. The function is used to ensure that active cooling can be used if certain set preconditions are met. Cooling Settings 3.1 Cooling Type Select the type of cooling coil installed.
  • Page 23 4.9 Dehumidification The function is used to lower the relative humidity in the room by dehumidification. When dehumidification of the room is demanded, the energy content of the air (enthalpy) is measured continuously in the fresh air and exhaust air respectively. The air that is dehumidified and supplied to the room will thus always be the air that requires the least energy for dehumidification.
  • Page 24 4.10 Summer/Winter Compensation Under General Temperature Settings, it is possible to set temperature compensation parameters for summer and winter operation. When selected, compensation offsets the temperature setpoint in relation to outdoor temperature in summer and/or winter. 5.3 Setpoint Compensation Enables/Disables Setpoint Conversation 5.4 Winter Start Temperature Outdoor temp temperature for start of winter compensation...
  • Page 25 4.11 Locking the Fan Speed Adjustment On the Home screen, by clicking on any fan, a popup screen opens. Select Hand on SA Fan Mode (and on RA Fan Mode) and then enter the desired speed on Hand Speed. The function, which is used for VAV installations, allows the installer to maintain constant air quantity during system adjustment.
  • Page 26 4.12 Communication Protocols External Communication Setting communication parameters for TCP/IP, LAN, Web browser and BMS Set Internet Connection Static/Dynamic DHCP = IP address assigned from DHCP server on local network or from the Internet Static = the installer must set the following communication parameters: •...
  • Page 27 BACnet Settings for external BACnet communication BACnet IP is enabled by default On the General Tab, it is possible to edit: • Controller Name • Device ID • Location • Description • APDU • APDU Segment Timeout • APDU Retries On Network IP Ports, it is possible to edit: •...
  • Page 28 4.13 Restore/Back-up Settings System > Backup & Restore tab > Import Backup From PC Select Backup File > Locate the saved file and select it > Next Nova Operations & Maintenance Manual...
  • Page 29 Select "User Management", "Network Configuration", "EC-gfxProgram and BACnet objects", "BACnet Configuration and Firmware Modules" boxes > Next Select "ECY303_RTU" box > Next Nova Operations & Maintenance Manual...
  • Page 30 Select "Remove backup file after restore" box > Finish The controller is now restoring the files and rebooting. This process takes about 3 minutes. Nova Operations & Maintenance Manual...
  • Page 31 5.0 OPERATION Setting operating modes and weekly programs. Nova Operations & Maintenance Manual...
  • Page 32 5.1 Operation Mode On the Home screen, by clicking on any fan, Select Fan Speed “Stop” = the system is stopped • Safety functions are active • Outdoor and exhaust air dampers are closed “Low speed” = the system runs constantly according to the parameter settings for low speed •...
  • Page 33 5.2 Scheduling Operating Times Schedules are used to define different weekly events (weekly schedule) and special events also referred to as exceptions. The different options used to configure a schedule are displayed by right-clicking on the Schedule. One menu is displayed when adding a new event and another menu is dis played when editing an existing event.
  • Page 34 5.2.2 Adding an Exception Exceptions are special events or special days in the currently selected schedule instance. Typically, you use them to define days with scheduling exceptions (for example, holidays). In the Exceptions tab, click Add. The Event Editor pop-up is displayed.
  • Page 35 5.3 Temperature Setpoint The setpoint described in this section is always the temperature setpoint for the control type selected. The options are: • Constant Supply Air Temp • Constant Return Air Temp • Constant Room Air Temp The selected control type is displayed above. Control Type is Selected Under Home >...
  • Page 36 5.4 Time and Date • Go to System and select the Locatime/ Time tab . • Set the “Set time automatically” button to ON, or enter the date and time manually. • If you wish to use the computer time, se- lect the “Get Current Computer Date Time”...
  • Page 37 5.5 Alarm Console The Alarm Console allows you to view and reset active alarms. The Alarm Console has two sections: Critical Alarms and Alarms Auto Reset. which will make a system stop procedure. Critical Alarms need to manual reset after they are triggered (with the exception of Ex- ternal Stop Digital Input which can be configured to auto reset).
  • Page 38 5.6 Trends The Trends screen contains the Trend Builder, which the operator can use to view all trend log objects that reside in the data tree of the controller by plotting the data of the selected trend on the chart, along the x and y axes.
  • Page 39 6.0 MAINTENANCE Warning: Danger: During all work on fan in the Clean the fan’s flow area: hazardous area: Wet cleaning under voltage may lead Maintenance operation is only to be to an electric shock - danger to life! performed by trained service personnel. Do not use any aggressive, paint solventcleaning agents when cleaning.
  • Page 40 6.2 DX Coil Note: When the coil surface itself Operation and Maintenance needs cleaning, ensure an appropriate for First Time Use solution and equipment are selected to avoid damage to the coil and/or Air Distribution enabling any health hazards. Cleaning should be done inwards from the air- •...
  • Page 41 6.3 Hydronic Coil Operation and Maintenance First Use Recommendation Cleaning • The air vent (at the uppermost point on • Coils must be cleaned periodically to obtainmaximum performance. Soiled fins theassembly) should be opened during set-up toexhaust any air from the coil. reduce the capacity of the coil, and de- mand more energy from the fan To maintain heat transfer capacity,...
  • Page 42 6.4 Core Core Cleaning Instructions We recommend washing our exchanger at least once per year, Obtain access to a source of using tap water. If the exchanger regular tap water. Do not use a becomes heavily soiled, a mild high-pressure water source detergent such as Dawn®, (pressure washer).
  • Page 43 6.5 Filters After dirty filter alarm has been initiated, check filter for obstructions. If there are no obstructions than the filter high limit pressure has been reach and the filter is considered to have reached the end of life and needs to be replaced.
  • Page 44 6.7 Control Unit Status Display The display shows an overview of the system’s actual status and operating conditions. The menu on the left allows navigation to the different screens: • Home Nova (System Overview) • Configuration screens (more details on section 6.8) •...
  • Page 45 Hand Mode Operation Setting equipment in Hand Mode can be Note: after maintenance and testing, used during service and maintenance to test make sure to set all components that the outputs work as intended. back to Auto for proper operation. Use the Master Auto button on To use Hand Mode, from the Home screen, General Configuration.
  • Page 46 6.8 Configuration Screens The Configuration screens display and allow modification of all the program settings. They are organized into groups: Fan Configuration, Preheat and Heat Configuration, Cooling and DX Coil Configuration and General Configuration. 6.8.1 Fan Configuration This screen allows configuration of the fans with the following settings: 1.1 Fan Speed Control Mode 1.4 Reduced Air Flow Option...
  • Page 47 1.35 High SA Pressure Alarm Time 1.11 Supply Air Fan Mid Speed Set the time to wait to trigger the Supply Set the required setpoint for Supply flow High Pressure Alarm when the pressure ex- at “Medium” speed during Constant Air ceeds the deadband (1.34 above) Volume control.
  • Page 48 1.70 Return Air Fan Low Speed Set the required setpoint for Return flow at “Low” speed during Constant Pressure-RA Salve or Constant Pressure-Both control 1.71 Return Air Mid Speed Set the required setpoint for Return flow at “Medium” speed during Pressure-Both Slave or Constant Pressure-Both control 1.72 Return Air High Speed Set the required setpoint for Return flow at...
  • Page 49 6.8.2 Fan Settings This screen allows configuration of the fans with the following settings: 1.80 Supply Air Fan Enable 1.90 Return Air Fan Enable This screen allows configuration of the Determines if the Return Fan is present heating coils (pre and post) or not 1.81 Supply Air Fan Start Delay 1.91 Return Air Fan Start Delay...
  • Page 50 6.8.3 Preheat & Post Heat Configuration This screen allows configuration of the heating coils (pre and post). 2.1 Preheater Type 2.21 Startup Heating Percentage Selects whether there is no preheater During the system start-up, sets the hydronic installed or if it is electric or hydronic. preheater output after starting the supply air fan.
  • Page 51 2.25 Frost Protection Alarm Temperature 2.54 Frost Protection P-Band Sets the hydronic return water temperature When the system is running and 2.50 is frost protection alarm setpoint. This alarm enabled, frost protection activates on a linear stops the unit. relationship defined by parameters 2.53 & 2.54.
  • Page 52 6.8.4 Coil Configuration This screen allows configuration of the cooling & DX Coils (Heat Pump) and HGRH 3.1 Cooling Type 3.10 Startup Heating Percentage Selects whether there is no cooling coil in- During the start-up sequence of the stalled or if it is a DX coil, Hydronic or HGRH. ventilation system, the heating valve will be overridden to the value set.
  • Page 53 3.32 RH Target Margin Dead band for the RH Target. Defines when the humidity level has been satisfied and cooling returns to normal. 3.33 Dehumidification Cooling Output Sets the cooling output during dehumidification. 3.34 RH Sensor Selection Selects what sensor to use for dehumidification: SA Duct, RA Duct or Room.
  • Page 54 6.8.5 DX Coil Configuration This screen allows configuration of the DX Coil when a W controller is used 3.50 Control Mode Selection 3.57 Cooling Step 2 Stable Time Set the DX coil W-controller mode as Step or Set the cooling step 2 elapse time before PI Control Mode step 3 starts.
  • Page 55 3.63 Heating Step 1 Stable Time Set the heating step 1 elapse time before step 2 starts. If during the stable time, the current temperature meets the deadband, time will expire immediately 3.64 Heating Step 2 Stable Time Set the heating step 2 elapse time before step 3 starts.
  • Page 56 DX Coil W-Controller heating mode DX Coil W-Controller cooling mode Nova Operations & Maintenance Manual...
  • Page 57 6.8.6 Filter & Damper Configuration This screen allows configuration of the filters and dampers. 4.1 Outdoor Air Damper 4.10 Outdoor Air Filter Selects whether the outdoor damper is Selects whether the outdoor air filter is present or not. present or not. 4.2 Outdoor Air Damper Delay Time 4.11 Alarm Type Set the time the damper takes to open.
  • Page 58 4.20 Exhaust Air Filter 4.36 Efficiency Warning Level Selects whether the exhaust air filter is Sets the sensible efficiency setpoint under present or not. which a warning is issued. 4.35 has to be set to Enable. 4.21 Alarm Type Select Static Pressure or Time Based for the 4.40 Frost Protection Type exhaust air filter.
  • Page 59 4.44 Ice Protection Temperature Sets the exhaust air temperature to trigger ice protection. When the exhaust air temperature falls below this setpoint plus Deadband (parameter 4.45). The bypass damper is open at 100%. If the exhaust air temperature remains below this setpoint for 10 minutes, the “HR core defrost”...
  • Page 60 6.8.7 General Configuration This screen allows configuration of general settings including fire alarms and temperature settings. 5.7 Summer Start Temperature 5.2 Temperature Control Mode Outdoor temperature for start of summer Selects the temperature control mode, compensation depending on the location of the temperature sensor used for control: 5.10 Temperature Setpoint Type Constant Supply Air Temp, Constant...
  • Page 61 5.15 Winter Temperature Setpoint 5.21 Unit Fire Alarm RA Temperature Set the Winter time setpoint. Winter time Set the internal fire Return Air Temperature. If is defined based on 5.11 above the temperature exceeds this value, the ERV triggers an alarm, fans stop, dampers are 5.16 Occupied Temperature Setpoint closed and heating and cooling systems are Set the Occupied temperature setpoint.
  • Page 62 5.46 Dial LCD Enable Master Auto button Determines if a Distech dial HMI is present Setting this button to ON changes the mode or not. If enabled and the HMI is not of every element to AUTO (Fans, Dampers, connected the controller will issue a Heater, Cooling, HGRH) communication alarm Use it if during commissioning some ele-...
  • Page 63 6.8.8 Alarm Settings This screen allows configuration of the alarms 6.1 Low SA Temp. Deadband 6.13 Auto Reset Set the low supply air temperature alarm Set the auto reset deadband. Low supply air temperature = • Disable: system stop and manual reset Temperature SP - Deadband •...
  • Page 64 6.8.9 myDC Control App The main menu of the controller appears with the following options: The myDC Control App from Distech allows control and monitoring of the unit from a • Schedules mobile phone or tablet. • Favorites Once connected to the controller via WiFi •...
  • Page 65 Schedules Schedules are used to define different weekly events (weekly schedule) and special events also referred to as exceptions. The app allows review or modification of the schedules set on the web HMI. Refer to section 2.2. Nova Operations & Maintenance Manual...
  • Page 66 Favourites The favorites screen allows quick access to the most important settings and data. It has 6 sections: Setpoints, Key Data, Control, Hand/ Auto, Alarms and Warnings Setpoints TemperatureSetpoint Set the required Temperature Setpoint (used for the Single Setpoint option) SAlowSpeedCfm Set the required setpoint for Supply flow at To modify at setpoint, touch it and from the...
  • Page 67 Key Data SAfanAirflowCfmHMI Current Supply Air Fan flow in CFM RAfanAirflowCfmHMI Current Return Air Fan flow in CFM SAtemperature Current Supply Air temperature in the selected units OAfilterPressure Current Outdoor Air Filter pressure in Pascals EAfilterPressure Current Exhaust Air Filter pressure in Pascals BPDposHMI Bypass Damper position in %...
  • Page 68 Control OperationModeSelection • Stop: The system is stopped • Low speed: The system runs constantly according to the parameter settings for low speed • Mid speed: The system runs constantly according to the parameter settings for mid speed • High speed: The system runs constantly according to the parameter settings for high speed •...
  • Page 69 Hand/Auto This screen allows selecting the operation mode of the unit’s elements. In Auto they follow the controller algorithms, in Hand they allow manual commands for commissioning and testing purposes. The elements are the following: SAfanHandAuto: Supply Air Fan mode SAfanHandSpeed: Supply Air Fan speed when in Hand mode RAfanHandAuto: Return Air Fan mode...
  • Page 70 Alarms These alarms auto-rest when the condition that causes them disappears ALARM STATE H101dinFault External stop alarm io fault H101doutFault G-Alarm io fault H102dinFault External start stop io fault H102doutFault Unit operation and fan run signal io fault H103ainFault Preheater return water temprature io fault H103doutFault Damper open close signal io fault H104ainFault...
  • Page 71 ALARM STATE RAfan3FBalarm RA fan 3 FB alarm RAhuba42CommFault RA huba sensor fault RAhuba42Fault RA huba sensor fault SAductHuba44CommFault SA duct huba sensor fault SAductHuba44Fault SA duct huba sensor fault SAductTempRHcommFault sensor fault SAductTempRHfault sensor fault SAfan1CommFault SA fan 1 comm fault SAfan1Fault SA fan 1 alarm SAfan1FBalarm...
  • Page 72 Critical Alarms These are the most critical alarms and their state. These alarms stop the unit and require manual reset. CRITICAL ALARM STATE EAdamperFBalarm Exhaust Air damper no open feedback detected FireAlarmInside Intrenal fire alarm HighRApressureAlarm High Return Air pressure alarm HighSApressureAlarm High Return Air pressure alarm HRcoreDefrostBPDEAalram...
  • Page 73 Warnings This is the list of the most critical alarms and their state. ALARM STATE CombiDefrostOnMsg DX coil OD defrost signal EAfilterPressWarning EA filter high pressure ECsmartWarning ECSmart sensor disconnected or fault HGRH1systemCommFault Daikin D Controller 1 Comm Fault HGRH1systemFault Daikin D Controller 1 Fault HGRH2systemCommFault Daikin D Controller 2 Comm Fault...
  • Page 74 Nova Operations & Maintenance Manual...
  • Page 75 Settings This screen allows setup of the date, time and time zone. Touch each section, and use the popup to set the desired date, time and zone. Nova Operations & Maintenance Manual...
  • Page 76 Device Information Contains information about the controller. The most relevant information is: • Version: This is the firmware installed on the controller. Consult with Oxygen8 for the recommend firmware • IP Address: IP address of the Ethernet adapter for wired communication with the controller •...
  • Page 77 7.0 ALARM LIST TYPE DELAY LIMIT AUTO UNIT ALARM/ DESCRIPTION ALARM SEC. RESET STOP WARNING Inside fire Internal fire alarm Alarm 1 alarm External External fire alarm Alarm 2 fire alarm HR core Core defrost alarm-by- defrost pass damper with EA Alarm 3 alarm temperature...
  • Page 78 TYPE DELAY LIMIT AUTO UNIT ALARM/ DESCRIPTION ALARM SEC. RESET STOP WARNING Hardware Input 104 Universal input 4 fault Alarm 11 Alarm Hardware Input 105 Universal input 5 fault Alarm 12 Alarm Hardware Input 106 Universal input 6 fault Alarm 13 Alarm Hardware Input 107...
  • Page 79 TYPE DELAY LIMIT AUTO UNIT ALARM/ DESCRIPTION ALARM SEC. RESET STOP WARNING SA fan 3 Supply air fan 3 Modbus Alarm 28 Alarm communication fault RA fan 3 Return air fan 3 Modbus Alarm 29 Alarm communication fault SA Huba SA fan pressure sensor sensor reliability or Modbus...
  • Page 80 TYPE DELAY LIMIT AUTO UNIT ALARM/ DESCRIPTION ALARM NO. SEC. RESET STOP WARNING Low effi- Core sensible efficiency ciency level Warning 10 lower than setpoint warning Electric post heater After cooling remnant heat flushing Warning 11 mode before unit stop Dehumidifi- DX coil/ HGRH Warning 12...

This manual is also suitable for:

Nova a16Nova b20Nova c20Nova c24Nova c30Nova a18 ... Show all