Systemair Topvex SR07, SR09, SR11 E Compact Air Handling Unit

Figure 1: Unit Versions

Diagrams illustrating the 'Left version' and 'Right version' of the air handling unit with numbered components.

Connection Box

Figure 2: Connection Box

Diagrams showing the connection box and its internal components.

Figure 3: System Diagram

Diagram illustrating the air handling unit with numbered components indicating air flow paths.

Figure 4: Control Panel

Diagram of the control panel with numbered buttons and LEDs.

Introduction

This manual provides basic information and recommendations for the Systemair Topvex SR compact air handling unit, covering its design, installation, start-up, and operation to ensure reliable performance. Thoroughly reading and following the guidelines and safety requirements in this manual is crucial for proper and safe operation.

Operation

General

This manual details common functions and settings. For more information on other functions, refer to the attached Corrigo E Manual, available at www.regin.se. Topvex units with an electrical heater have a 3-minute re-cooling period after being turned off. If a fire alarm is activated during heating, the fan stops immediately without re-cooling, which can trip the overheating protection. Manual reset for overheating protection is shown in Figure 2. The maximum allowed supply air temperature is 35°C.

Set the menu language

To set the menu language: Press the OK button while switching on the mains supply. Press OK again. Use the UP/DOWN buttons to select the desired language and press OK to confirm. Press the LEFT button to return to the previous menu. Language can also be changed via Configuration/System/Choose Language (page 16).

Control panel

Access rights

Three access levels are available: System (highest authority), Operator (read-only in configuration, read/write in settings/parameters), and Basic (read-only for all settings/parameters). Default passwords are: System 1111, Operator 3333, Basic 5555.

How to operate

Menus are organized in a horizontal tree structure. UP/DOWN buttons navigate menus at the current level; RIGHT/LEFT buttons move between menu levels. UP/DOWN buttons adjust parameter values, and RIGHT/LEFT buttons move between digits within a parameter. The OK button confirms selections, and the C button aborts changes. The ALARM button accesses the alarm list.

Changing parameters

Parameters that can be set are indicated by a flashing LED. Press OK to change a parameter, turning the LED steady. A cursor appears at the first settable value. Use UP/DOWN to change the value and RIGHT/LEFT to move between digits. Press OK to confirm. Settings outside the valid intervals are rejected. The cursor moves to the next settable value automatically. Press RIGHT to skip a value. To abort a change, press and hold the C button until the cursor disappears.

Navigating the menus

The start display is the root of the menu tree. Pressing DOWN navigates to the lowest level, and UP moves back. To enter a higher menu level, position the marker using UP/DOWN and press RIGHT. Submenus are indicated by an arrow symbol; press RIGHT to access them and LEFT to go back.

Alarms

The ALARM button (Figure 4, pos. 1) opens the alarm queue. Active and unacknowledged alarms are displayed. The alarm LED (Figure 4, pos. 2) blinks for unacknowledged alarms and is steady for acknowledged active alarms. Use UP/DOWN to cycle through multiple alarms. Alarms can be acknowledged or blocked using OK and UP/DOWN buttons. Select Cancel and press LEFT to return to the start menu. Refer to the Commissioning protocol (page 26) for alarm settings.

Extra stop function

For critical alarms like high temperature limits or frost protection, the stop function is always reset to Active, even if set to Inactive by the operator. This is due to program space limitations.

Starting up the unit

• Ensure all external equipment is connected.
• Verify fuses (Figure 2, pos. 21) are switched on.
• Switch on the supply voltage.
• Set the present time and date, control temperature, and program the week schedule.
• Configure any extra functions as needed.

Control unit, manual

Actual / Setpoint

Displays outdoor and supply air temperatures. Setpoint for supply air temperature can be adjusted, or calculated via Cascade function based on exhaust/room temperature. Supply air temperature settings include direct values and outdoor compensated values for different outdoor temperatures. Maximum allowed supply air temperature is 35°C.

Exhaust air temperature: Displays and allows setting of exhaust air temperature. Used for exhaust air control.

Room temperature: Displays and allows setting of room temperature. Used for room or room/supply air control.

Flow control SAF/Pressure control SAF: Used for constant flow or pressure control. Displays and sets actual and setpoint values for flow or pressure.

Input / Output

Provides configuration and actual values for analogue and digital inputs and outputs.

Time Settings

Allows setting of Time, Date, and Weekday. Enables configuration of Normal and Reduced fan speed periods for weekdays and holidays. Holidays can be set by month and day.

Settings

Manual/Auto

Controls the running mode (Auto, On, Off). Other settings trigger Manual mode alarms, which reset when Auto is selected.

Supply temp contr.

Sets supply temperature control to Auto, On, or Off. Output signals follow if in Auto mode.

SAF/EAF

Sets Supply/Exhaust air fan to Auto, Manual full speed, Manual half speed, or Off. Output signals can be set to 0-100% in Manual mode.

Heating

Sets the output signal for the Heater (Y1) to Auto, Manual, or Off. Output signal can be 0-100% in Manual mode.

Exchanger

Sets the output signal for the Exchanger to Auto, Manual, or Off. Output signal can be 0-100% in Manual mode.

Cooling

Sets the output signal for Cooling to Auto, Manual, or Off. Output signal can be 0-100% in Manual mode.

P1-Heating/Cooling

Sets output signals for P1-Heating pump, P1-Exchanger motor, and P1-Cooling pump to Auto, On, or Off.

Dampers

Sets output signals for Fresh air, Recirculation, and Extract air dampers to Auto, Open, or Close.

Configuration

Inputs/Outputs

Details configuration for Analogue and Digital inputs/outputs, including compensation and status display.

Control function

Allows selection of control modes such as Extract air control, Room control, Outdoor temperature compensated supply air control, and Supply air control. Includes options for cascade control and outdoor temperature dependent switching.

If cascade control max/min supply setp.

Sets the maximum and minimum allowed supply air temperature when Cascade function is active.

Object Types

Configures Cooling (0-10V DC activation) and Pump control (stop settings, delay, outdoor temperature limits).

System

Choose Language

Sets the menu language. A shortcut is available by pressing OK simultaneously with the main voltage switch-on.

Choose Start Screen

Allows selection from 5 different start screen layouts, displaying date, time, running status, and temperature setpoints/actual values.

Automatic summer/winter time change over

Enables automatic adjustment of the internal clock for daylight saving time.

Address: PLA ELA / Address for remote communication

Used for units connected to an Exonetwork. Addresses for remote communication can be set here. Caution is advised when changing these values.

Communication code for modbus

Activates or deactivates Modbus communication. A code is required for activation.

Access Rights

Log on

Allows logging on to any level using a 4-digit code. The cursor appears at the first digit upon pressing OK. Use UP/DOWN to select digits and RIGHT to move to the next position. Press OK to confirm. The 'Actual level' display updates after logon.

Log off

Logs off from the current level to the basic 'no-log on' level. Logoff also occurs automatically after 5 minutes of inactivity.

Change password

Allows changing passwords for levels equal to or lower than the current active level. Default passwords are System 1111, Operator 3333, Basic 5555.

Warning

To prevent electrical shock, fire, or other damage due to improper use or operation, adhere to the following:

• Install the system according to mounting instructions.
• Insulate mains supply before service or cleaning.
• Do not connect a tumble dryer directly to the ventilation system.
• Ensure filters are correctly mounted before operation.
• Perform maintenance as per instructions.

Maintenance

Maintenance of the Topvex unit should be performed 3-4 times per year. In addition to general cleaning:

1. Changing Supply/Extract air filter (indicated as 'Filter guard'): Bag filters must be replaced as needed. Pressure guards monitor filters. Initial pressure drop: F7 filters ≈ 80Pa, F5 filters ≈ 45Pa. Final pressure drop: ≈ 240 Pa.
2. Checking the heat exchanger (Annually): Clean the exchanger surface with a vacuum cleaner brush fitting to remove dust buildup and maintain efficiency. Avoid damaging the surface. Compressed air can be used if necessary. Check and replace the transmission belt if worn or slack.
3. Checking the fans (Annually): Clean fans with a cloth or soft brush to remove dust and grease buildup. White spirit can be used for stubborn deposits. Ensure fans are dry before remounting.
4. Cleaning extract louvers and inlet diffusers: Remove and wash diffusers/louvers in hot soapy water. Reinstall them in their original positions to maintain system balance.
5. Checking the fresh air intake: Clean the air intake grille at least twice a year to prevent clogging by leaves or pollution.
6. Checking the duct system: Clean duct runs as necessary to remove dust and grease settlements that reduce efficiency. Steel ducts can be cleaned using a brush soaked in hot soapy water.

Note: The roof cowl should also be checked and cleaned annually.

Troubleshooting

Before contacting a service representative, check the following:

• Fan(s) do not start: Check for active alarms, control panel settings (times, schedules, modes), and fuse integrity.
• Reduced airflow: Check fan speed settings, damper operation, filter condition, diffuser/louver cleanliness, fan cleanliness, air intake/roof unit for blockages, and duct system for damage or buildup.
• Cold supply air: Check control temperature, overheating thermostat status (reset if necessary via connection box, Figure 2, pos. 26), extract filter condition, heat exchanger rotation, and fan thermo contact status (reset if necessary, see page 3).
• Noise/vibrations: Clean fan impellers and ensure fan mounting screws are tightened.

Service

Before contacting service, note the unit's specification and production number from the data plate.

Commissioning record

This section provides fields for recording commissioning data, including customer details, unit specifications, installation address, and preset/set values for various functions like temperature, airflow, and outdoor compensation.

Function Settings

Temperature (°C)

Control function Temp.

Set point: Configurable temperature setpoint.

Outdoor compensating (supply air controlling)

Outdoor/supply temp.: Defines temperature compensation curves for supply air control based on outdoor conditions. Includes settings for different temperature points and ranges.

Air flow

Fan regulation

Set point Normal: Configures supply and extract fan settings for normal operation.

Set point Reduced: Configures supply and extract fan settings for reduced speed operation.

Outdoor compensation

Sets outdoor temperature compensation for flow/pressure, including lower and upper points and activation conditions.

Cooling

Control function cooling

Configures cooling control mode (Not active, 0-10V, On/off) and on/off function steps.

Number of binary steps

Sets the number of binary steps for control.

Lowering of min. control temp. supply air, DX cooling

Sets a reduction value for minimum supply air temperature during DX cooling.

Humidity

Control function humidification.

Configures humidification/dehumidification modes (Disable, Humidification, De-humidification, Humidification / De-humidification) and sensor types (Room sensor, Room and Duct sensor).

Set point / Max. limit (duct sensor)

Sets the target humidity level and the maximum limit for duct sensor readings.

Week scheduler settings

Allows programming of weekly schedules for Normal and Reduced fan speeds, including periods and holiday settings.

Holidays

Enables setting of up to 24 holiday dates (month.day) to override the standard weekly schedule.

Frost Protection

Mode (EL unit Off)

Enables or disables frost protection.

Frost limit temperature

Sets the temperature limit for frost protection activation.

Set point when stopped (return water)

Defines the setpoint when the unit is stopped.

P-band when running

Sets the proportional band for the running mode.

Night cooling

Mode

Enables or disables night cooling.

Run when day outdoor temp is higher than

Sets the outdoor temperature threshold for activating night cooling during the day.

Stop when night outdoor temp is higher than

Sets the outdoor temperature threshold to stop night cooling.

Stop when night outdoor temp is lower than

Sets the outdoor temperature threshold to stop night cooling.

Stop when room temp is lower than

Sets the room temperature threshold to stop night cooling.

Cool Recycling

Mode

Enables or disables cool recycling.

Start Limit

Sets the start limit for cool recycling.

Control On Demand

Min time for control on demand

Sets the minimum time for demand-controlled operation.

Support control

Enables or disables support control.

Run Exhaust Air Fan when support control active

Configures the exhaust air fan operation during support control.

CO2 control

CO2 control

Enables CO2 control based on active or inactive time channels.

CO2 control Type

Selects control type: Damper or Fan.

Fire Function

Fire damper function

Configures fire damper operation: Off, Damper normally closed, Damper normally opened.

Extraction when fire alarm

Configures extraction behavior during a fire alarm: Off, Normally opened, Normally closed.

Fire input

Sets the fire alarm input type.

Fire damper exercise

Configures fire damper exercise: No exercise, Exercise with ventilation running, Exercise with ventilation stopped.

Fire damper run time / interval / exercise hour

Sets parameters for fire damper exercise timing.

Mixing damper Min Limitation

Mode / Limit

Sets the mode and limit for mixing damper operation.

External Set point Knob

External set point knob

Enables or disables the external setpoint knob.

Min set point of knob / Max set point of knob

Sets the minimum and maximum range for the external setpoint knob.

Heat Pump (HW unit)

Pump stop mode (EL unit Off)

Sets the pump stop mode.

Pump stop delay

Sets the delay for pump stop.

Stop pump at temp

Sets the temperature at which the pump stops.

Pump stop hysteretic

Sets the hysteretic value for pump stop.

Pump exercise hour

Sets the pump exercise hour.

Cool Pump

Pump stop delay

Sets the pump stop delay for the cool pump.

General

Heat Pump Indication / Cool Pump Indication

Configures motor protection and run indication for heat and cool pumps.

Outdoor Temperature Related Settings

Full heat when outdoor temp is below

Sets the outdoor temperature threshold for full heating operation.

Miscellaneous

Extended operation

Sets the duration for extended operation.

Min. set point reduction, Supply air. At DX-Cooling

Sets the minimum setpoint reduction for supply air during DX cooling.

Alarm configuration

Detailed table listing various alarm settings, including Class, Delay, Stop ventilation unit if alarm active, and specific parameter thresholds for each alarm type (e.g., Supply Air Fan out of operation, Sensor error, High room temp, Frost risk, Low efficiency).

In/Output Configurations

Possible choices of Analogue input signal

Lists available analogue input signals and their configuration options (e.g., Outdoor temperature sensor, Supply air temperature sensor, CO2/VOC sensor, Pressure transmitter).

Possible choices of Analogue output signal

Lists available analogue output signals and their configuration options (e.g., Y1 Actuator Heating, Y2 Actuator Exchanger, Frequency converter).

Possible choices of Digital input signal

Lists available digital input signals and their configuration options (e.g., Filter guard, Fire alarm, Extended Operation, Frost protection thermostat).

Possible choices of Digital output signal

Lists available digital output signals and their configuration options (e.g., Extract air close-off damper, Heating 3-pos. actuator, Step controller heating, Step controller cooling, Extra Timer channel).

Systemair AB Contact Information

Systemair AB

Industrivägen 3

SE-739 30 Skinnskatteberg

Phone: +46 222 440 00

Fax: +46 222 440 99

Website: www.systemair.com

Document Number: 205873 (29-05-2009)

NB. Systemair AB reserves the right to make changes and improvements to the contents of this manual without prior notice.