<html><head><link rel="stylesheet" href="systemair.css" type="text/css" /></head><body><span id="AD1"><p class="header1">Systemair E28 integrated control system</p><p class="poffset1">DV air handling units are built with a complete and fully integrated control system - based on the Systemair E28 controller.</p><p class="poffset1">Before shipment the unit has been assembled and has passed a final functional test and inspection. Order-specific set-up and parameters are stored in the controller during this process. </p><p class="flowchart">FLOWCHART</p><p class="header2">DV unit delivered in sections</p><p class="poffset2">Is provided with feet or base frame. The unit is divided into sections after the test. When the unit is reassembled on the site, cables must be reconnected in the preinstalled cable ducts. Then the cables with plug terminals are to be reinstalled in the marked switchboard terminals. The mains supply cable from fan motor frequency converters is to be connected to automatic fuses. If the DV Cooler unit is integrated in the unit, the mains supply cable for this is to be mounted in the automatic fuses</p><p class="header2">DV unit delivered as one section</p><p class="poffset2">Is provided with feet or base frame. All internal components are connected to the switchboard terminals. If the DV Cooler unit is integrated in the unit, the mains supply cable for this is to be mounted in the automatic fuses.</p><p class="header2">Recovery with rotary heat exchanger</p><p class="poffset2">The capacity of the rotary heat exchanger is stepless via the modulating control of rotary speed. </p><p class="header2">Switchboard and mains supply</p><p class="poffset2">The switchboard with terminal blocks, relays, fuses, 24 V AC power supply and controller is mounted according to customer requirements.</p><p class="poffset2">On the site mains power supply must be connected directly in the switchboard.</p><p class="poffset2">Supply disconnecting device is not included. But supply disconnecting device is available - mounted or not mounted - see the order confirmation.</p><p class="header2">External electrical components</p><p class="poffset2">Temperature sensor for supply air and the temperature sensor for frost protection in the heating coil are provided with cable and connected to the board.</p><p class="poffset2">Terminals in the board for pressure transmitters in ducts for pressure control, valves and circulation pump for heating coil are not connected with cables to components and components are not installed.</p><p class="poffset2">Hand terminal with 10 m cable is not connected to controller.</p><p class="poffset2">The mains power supply on the site must be provided with equipment in accordance to local statutory requirements for additional protection of frequency converters.</p><p class="header2">Controller and hand terminal</p><p class="poffset2">The controller is installed in the switchboard, and the programming and normal handling is carried out from a separate cable-connected (10m) hand terminal with display and buttons - the Systemair Control Panel - the SCP. The protection class of the hand terminal is IP 41. </p><p class="poffset2">It is possible to control the unit with the hand terminal up to 1200 metres away from the unit with the assistance of a repeater (optional). The distance between repeater and hand terminal is restricted to the 10 metres of cable in the hand terminal. Protection class for the repeater is IP20. The cable between the controller in the unit and the repeater is not delivered by Systemair.</p><p class="header2">Schedules</p><p class="poffset2">The regulator has individual schedules for start, stop and high/low air flow rate for each week-day as well as schedules for holidays.</p><p class="poffset2">The regulator has automatic summer-winter-time change over. </p><p class="poffset2">Outside normal operating hours, free cooling is available according to settings. </p><p class="header2">Access rights - passwords</p><p class="poffset2">There are 3 different log-on levels</p><p class="bullet1">Operator level or basic level - (no password) - access to read values and to change user relevant settings concerning schedules, temperature, air flow and to cancel alarm and even to restart the system after having removed the reason that triggered the alarm.</p><p class="bullet1">Service level (password) - access to change fundamental values, access to store new settings, access to restart the system according to user s own former settings or original factory settings. </p><p class="bullet1">System level which has the highest authority level (special password) with full read/write access to all settings and parameters (also access to the configuration of the whole system)</p><p class="header2">Alarms and safety functions</p><p class="poffset2">If an alarm condition occurs, the Alarm LED on the hand terminal will flash. The LED will continue to flash as long as there are unacknowledged alarms. Alarms are logged in the alarm list. The list shows the type of alarm, date and time for the alarm and alarm class - A, B or C:</p><p class="bullet1">Alarm type A will stop the fans and close the dampers or switch the unit to a special mode according to the configuration </p><p class="bullet1">Alarm type B is only to inform the users of a failure. The unit is still running as well as possible</p><p class="bullet1">Alarm type C - only to inform the user that the unit has been switched away from automatic running mode to manual control</p><p class="poffset2">For frost protection of the heating coil a temperature sensor is installed in a return circuit of the coil. The control signal to the mixing valve is kept at a level that secures that water return temperature is at all times kept at a factory set minimum. This protection is also active when the unit is not running. This extended system offers maximum protection safety. If the water temperature is getting too low anyway, the unit including fans is shut down.</p><p class="header2">Flexible System</p><p class="poffset2">A qualified service technician - on the site and at the request of the user - will be able to adapt the regulation further to the requirements of the users;</p><p class="bullet1">The air flow regulation can be changed between 2 methods that are constant air volume through the fans or constant pressure in the ducts.</p><p class="bullet1">The temperature control mode can be changed between room temperature control, supply air temperature control and outdoor compensation of the selected temperature.</p><p class="bullet1">In addition to the fixed schedule, an external start signal for extended operation is available.</p><p class="bullet1">In addition or as an alternative to the fixed schedule, an external start/stop input signal is available. </p><p class="bullet1">A large number of other alternative functions are optional.</p></span><span id="AD2"><p class="header1">Systemair E28 integrated control system</p><p class="poffset1">DV air handling units are built with a complete and fully integrated control system - based on the Systemair E28 controller.</p><p class="poffset1">Before shipment the unit has been assembled and has passed a final functional test and inspection. Order-specific set-up and parameters are stored in the controller during this process. </p><p class="flowchart">FLOWCHART</p><p class="header2">DV unit delivered in sections</p><p class="poffset2">Is provided with feet or base frame. The unit is divided into sections after the test. When the unit is reassembled on the site, cables must be reconnected in the preinstalled cable ducts. Then the cables with plug terminals are to be reinstalled in the marked switchboard terminals. The mains supply cable from fan motor frequency converters is to be connected to automatic fuses. If the DV Cooler unit is integrated in the unit, the mains supply cable for this is to be mounted in the automatic fuses</p><p class="header2">DV unit delivered as one section</p><p class="poffset2">Is provided with feet or base frame. All internal components are connected to the switchboard terminals. If the DV Cooler unit is integrated in the unit, the mains supply cable for this is to be mounted in the automatic fuses.</p><p class="header2">Recovery with plate heat exchanger</p><p class="poffset2">The capacity of the plate heat exchanger is step less via the modulating control of the by-pass damper through distribution of supply air between the plate heat exchanger and the by-pass channel. </p><p class="header2">Switchboard and mains supply</p><p class="poffset2">The switchboard with terminal blocks, relays, fuses, 24 V AC power supply and controller is mounted according to customer requirements.</p><p class="poffset2">On the site mains power supply must be connected directly in the switchboard.</p><p class="poffset2">Supply disconnecting device is not included. But supply disconnecting device is available - mounted or not mounted - see the order confirmation.</p><p class="header2">External electrical components</p><p class="poffset2">Temperature sensor for supply air and the temperature sensor for frost protection in the heating coil are provided with cable and connected to the board.</p><p class="poffset2">Terminals in the board for pressure transmitters in ducts for pressure control, valves and circulation pump for heating coil are not connected with cables to components and components are not installed.</p><p class="poffset2">Hand terminal with 10 m cable is not connected to controller.</p><p class="poffset2">The mains power supply on the site must be provided with equipment in accordance to local statutory requirements for additional protection of frequency converters.</p><p class="header2">Controller and hand terminal</p><p class="poffset2">The controller is installed in the switchboard, and the programming and normal handling is carried out from a separate cable-connected (10m) hand terminal with display and buttons - the Systemair Control Panel - the SCP. The protection class of the hand terminal is IP 41. </p><p class="poffset2">It is possible to control the unit with the hand terminal up to 1200 metres away from the unit with the assistance of a repeater (optional). The distance between repeater and hand terminal is restricted to the 10 metres of cable in the hand terminal. Protection class for the repeater is IP20. The cable between the controller in the unit and the repeater is not delivered by Systemair.</p><p class="header2">Schedules</p><p class="poffset2">The regulator has individual schedules for start, stop and high/low air flow rate for each week-day as well as schedules for holidays.</p><p class="poffset2">The regulator has automatic summer-winter-time change over. </p><p class="poffset2">Outside normal operating hours, free cooling is available according to settings. </p><p class="header2">Access rights - passwords</p><p class="poffset2">There are 3 different log-on levels</p><p class="bullet1">Operator level or basic level - (no password) - access to read values and to change user relevant settings concerning schedules, temperature, air flow and to cancel alarm and even to restart the system after having removed the reason that triggered the alarm.</p><p class="bullet1">Service level (password) - access to change fundamental values, access to store new settings, access to restart the system according to user s own former settings or original factory settings.</p><p class="bullet1">System level which has the highest authority level (special password) with full read/write access to all settings and parameters (also access to the configuration of the whole system)</p><p class="header2">Alarms and safety functions</p><p class="poffset2">If an alarm condition occurs, the Alarm LED on the hand terminal will flash. The LED will continue to flash as long as there are unacknowledged alarms. Alarms are logged in the alarm list. The list shows the type of alarm, date and time for the alarm and alarm class - A, B or C:</p><p class="bullet1">Alarm type A will stop the fans and close the dampers or switch the unit to a special mode according to the configuration </p><p class="bullet1">Alarm type B is only to inform the users of a failure. The unit is still running as well as possible</p><p class="bullet1">Alarm type C - only to inform the user that the unit has been switched away from automatic running mode to manual control</p><p class="poffset2">For frost protection of the heating coil a temperature sensor is installed in a return circuit of the coil. The control signal to the mixing valve is kept at a level that secures that water return temperature is at all times kept at a factory set minimum. This protection is also active when the unit is not running. This extended system offers maximum protection safety. If the water temperature is getting too low anyway, the unit including fans is shut down.</p><p class="poffset2">To prevent the plate heat exchanger from being blocked and damaged by ice when the outdoor air temperature is very low, the flow of outdoor air through the plate heat exchanger is reduced. The distribution of the flow between the exchanger and the by-pass channel is calculated in the PI regulation to keep the heat exchange capacity as large as possible without being blocked by ice. The dampers are controlled by the modulating damper motor.</p><p class="poffset2"> </p><p class="header2">Flexible System</p><p class="poffset2">A qualified service technician - on the site and at the request of the user - will be able to adapt the regulation further to the requirements of the users;</p><p class="bullet1">The air flow regulation can be changed between 2 methods that are constant air volume through the fans or constant pressure in the ducts.</p><p class="bullet1">The temperature control mode can be changed between room temperature control, supply air temperature control and outdoor compensation of the selected temperature.</p><p class="bullet1">In addition to the fixed schedule, an external start signal for extended operation is available.</p><p class="bullet1">In addition or as an alternative to the fixed schedule, an external start/stop input signal is available. </p><p class="bullet1">A large number of other alternative functions are optional.</p></span><span id="BD1"><p class="header2">Cascaded room temperature control</p><p class="poffset2">The control of the supply air temperature is based on the values from 2 temperature sensors:</p><p class="bullet1">a sensor inside the extract section giving the mixed average temperature from the rooms</p><p class="bullet1">a sensor cable installed in the supply air duct. The sensor is delivered without cable </p><p class="bullet1">The supply air temperature is controlled by a cascaded room temperature programme to achieve a constant, settable room temperature. The set points for the room temperature as well as the temperature limits for the supply air temperature can be adjusted on the hand terminal. The output from the room temperature PI-loop controls the PI-loop for the supply air temperature set-point. The set-point value is achieved by controlling the capacity of the heat exchanger, heating coil and cooling coil (if installed). The control of all capacities is fully modulating. </p></span><span id="BD2"><p class="header2">Supply air temperature control</p><p class="poffset2">The control of the supply air temperature is based on the value from the sensor mounted by the installer in the supply air duct. The sensor is delivered without cable.</p><p class="bullet1">The supply air temperature is controlled by a PI-regulator (PI control loop). The set-point for the supply temperature can be adjusted on the hand terminal. The supply air temperature is kept at the set-point value by controlling the capacity of the heat exchanger, heating coil and cooling coil (if installed). The control of all capacities is fully modulating.</p></span><span id="BD3"><p class="header2">Outdoor temperature compensated supply air control</p><p class="poffset2">Control of the supply air temperature is based on the values from 2 temperature sensors:</p><p class="bullet1">a sensor inside the unit before the supply air filter giving the outdoor temperature</p><p class="bullet1">a sensor mounted by the installer in the supply air duct. The sensor is delivered without cable. </p><p class="bullet1">The supply air temperature is controlled by a PI-regulator and the set-point is outdoor air temperature compensated using a control curve with 6 node points. The set point for the supply air temperature can be adjusted on the hand terminal. The supply air temperature is kept at the set-point value by controlling the capacity of the heat exchanger, heating coil and cooling coil (if installed). The control of all capacities is fully modulating. </p></span><span id="BD4"><p class="header2"> Outdoor temperature dependent switching between room temperature control and supply air temperature control</p><p class="poffset2">When the outdoor temperature is lower than a settable value (winter) outdoor compensated supply air temperature control will be active, otherwise when the outdoor temperature is above this settable value (summer), cascaded room temperature control will be active. </p><p class="poffset2"> </p><p class="poffset2">Cascaded room temperature control (summer).</p><p class="poffset2">Control of the supply temperature is based on the values from 2 temperature sensors:</p><p class="bullet1">a sensor inside the extract section giving the mixed average temperature from the rooms</p><p class="bullet1">a sensor installed in the supply air duct. The sensor is delivered without cable.</p><p class="bullet1">The supply air temperature is controlled by a cascaded room temperature programme to achieve a constant, settable room temperature. The set points for the room temperature as well as the temperature limits for the supply air temperature can be adjusted on the hand terminal. The output from the room temperature PI-loop controls the PI-loop for the supply air temperature set-point. The set-point value is achieved by control of the capacity of the heat exchanger, heating coil and cooling coil (if installed). The control of all capacities is fully modulating. </p><p class="header2">Outdoor temperature compensated supply air control</p><p class="poffset2">Control of the supply air temperature is based on the values from 2 temperature sensors:</p><p class="bullet1">a sensor inside the unit before the supply air filter giving the outdoor temperature</p><p class="bullet1">a sensor mounted by the installer in the supply air duct. The sensor is delivered without cable. </p><p class="bullet1">The supply air temperature is controlled by a PI-regulator and the set-point is outdoor air temperature compensated using a control curve with 6 node points. The set point for the supply air temperature can be adjusted on the hand terminal. The supply air temperature is kept at the set-point value by controlling the capacity of the heat exchanger, heating coil and cooling coil (if installed). The control of all capacities is fully modulating. </p></span><span id="CD1"><p class="header2">Constant air volumes - Normal and Reduced through the fans</p><p class="poffset2">The air flow rates of supply and extract air are controlled separately. The supply and extract air at Normal and Reduced airflow in m³/h are set separately on the hand terminal. The differential pressures across the fans are measured by pressure transducers. On the basis of the pressures the actual air flows are calculated by the controller in m³/h. </p></span><span id="CD2"><p class="header2">Constant pressure in ducts</p><p class="poffset2">The air pressure of supply and extract air are controlled separately. The supply and extract air at Normal and Reduced air pressure in Pa are set separately on the hand terminal. The air pressures are measured by pressure transducers in the supply air duct and in the exhaust air duct. A PI-regulator maintains the set point value by controlling the speed of the fans via frequency converters.</p></span><span id="CD3"><p class="header2">Constant pressure in ducts with the exhaust fan as slave</p><p class="poffset2">The rotational speed of the supply air fan and the exhaust air fan is controlled by a pressure transmitter which is placed in the supply air duct. The exhaust fan follows the control signal for the supply air fan. A scaling factor can be added to the signal for the exhaust air fan to achieve the desired balance between supply air and exhaust air capacity. Air pressure in Pa for Normal and Reduced capacities are set separately on the hand terminal. A PI-regulator maintains the set point value by controlling the speed of the fans via a frequency converter for each fan.</p></span><span id="CD4"><p class="header2">Constant rotational speed for 2 centrifugal fans</p><p class="poffset2">The rotational speed of supply and extract fans are controlled separately and they are set on the hand terminal for Normal and Reduced speed as percentages of maximum speed. Each fan is controlled by afrequency converter.</p></span><span id="CD5"><p class="header2">CO2-value controlled airflow</p><p class="poffset2">When the CO2-value increases above control value 1, the fans will start at Reduced speed, if they are not already running. Should CO2-value continue to increase, the fan speed will also increase until the CO2-value reaches control value 2 at which the fans will be running at Normal speed. The air pressures are measured by pressure transducers in the supply air duct and in the exhaust air duct. A PI-regulator maintains the set point value by controlling the speed of the fans via a frequency converter for each fan and a CO2-sensor for mounting in room is included from Systemair.</p></span><span id="CD6"><p class="header2">Outdoor temperature compensation of airflow</p><p class="poffset2">Air flows for supply air and for exhaust air are dependent on outdoor temperature. For example, flows are reduced when the outdoor temperature is low.</p><p class="poffset2">The outdoor temperature compensation is linear and is set using two parameter pairs which give the value of the compensation at two different outdoor temperatures. A PI-regulator maintains the set point value by controlling the speed of the fans via a frequency converter for each fan.</p></span><span id="CD7"><p class="header2">Control of rotational speed via external 0-10V signal</p><p class="poffset2">The rotational speed of supply and extract fans are controlled separately via 0-10 V external signals where 0 V is stopped and 10 V is full speed. Each fan is controlled a frequency converter.</p></span><span id="DD1"><p class="header2">No lamps in the unit</p><p class="poffset2">No lamps and switch installed. </p></span><span id="DD2"><p class="header2">Lamps in the unit</p><p class="poffset2">A switch for the lamps is installed in the switchboard. Plug terminals are mounted on all cables from lamps that are not installed in the same section as the switchboard. Cable ducts are installed for cables from those lamps to the switchboard. All cables are prepared for easy installation on the site.</p></span><span id="ED1"><p class="header2">DV10-DV150 delivered in sections and with switchboard on the unit.</p><p class="poffset2">The switchboard is mounted on the unit according to technical specifications. Cables from components that are not installed in the section with the switchboard are provided with plug terminals for easy connection. Ducts for cables are installed on the unit. The switchboard is delivered without safety cut-off switch. </p></span><span id="ED2"><p class="header2">DV10-DV50 delivered on base frame and with switchboard in the unit</p><p class="poffset2">The switchboard is 100 % integrated in the unit according to technical specifications. All internal cables between components and switchboard are mounted in the unit. A cable gland is mounted under the switchboard for all external cables. The switchboard is delivered without safety cut-off switch. </p></span><span id="ED3"><p class="header2">DV60-DV100 delivered on base frame and with switchboard in the unit</p><p class="poffset2">The switchboard is 100 % integrated in the unit according to technical specifications. All internal cables between components and switchboard are mounted in the unit. A cable gland is mounted under the switchboard for all external cables. The switchboard is delivered without safety cut-off switch. </p></span><span id="ED4"><p class="header2">DV120-DV150 delivered on base frame and with switchboard in the unit</p><p class="poffset2">The switchboard is 100 % integrated in the unit according to technical specifications. All internal cables between components and switchboard are mounted in the unit. A cable gland is mounted under the switchboard for all external cables. The switchboard is delivered without safety cut-off switch. </p></span><span id="FD1"><p class="header2">Frequency converters</p><p class="poffset2">The unit is always delivered with a frequency converter for the supply air fan and a frequency converter for the exhaust air fan. Each frequency converter is always installed in the unit beside the fan that it controls. All parameters in each frequency converter are always optimized to fan demands and tested at the factory. </p></span><span id="GD1"><p class="header2">No heating and/or cooling</p><p class="poffset2">The unit is not delivered with heating battery and/or cooling battery. The controller is provided with software to become activated, if the unit is later provided with heating battery, cooling battery, valves and valve motors. Recovery in the unit is activated and maintains set-point temperatures as well as possible. </p></span><span id="GD2"><p class="header2">Frost protection of the heating coil - water temperature sensor</p><p class="poffset2">For frost protection, the water temperature in the coil is transmitted to the controller by a temperature sensor in a water return circuit of the coil. The controller always generates a signal to the valve motor that keeps a sufficient flow of hot water to protect the coil against frost. This frost protection is also activated when the running mode is  off .</p><p class="poffset2">If the water temperature falls below the set point temperature the fans stop, the dampers close, and an alarm is activated. </p></span><span id="GD3"><p class="header2">Frost protection of the heating coil - water temperature sensor as well as capillary temperature sensor on the coil surface.</p><p class="poffset2">For frost protection, the water temperature in the coil is transmitted to the controller by a temperature sensor in a water return circuit of the coil. The controller always generates a signal to the valve motor that keeps a sufficient flow of hot water to protect the coil against frost. This frost protection is also activated when the running mode is  off .</p><p class="poffset2">If the water temperature falls below the set point temperature the fans stop, the dampers close, and an alarm is activated. </p><p class="poffset2">For additional frost protection, a mechanical thermostat with a capillary tube mounted on the surface of the coil will stop the fans directly if the temperature falls below the thermostat set-point. In addition it will cause a controlled shut down of the unit - dampers close and all other functions stop, and an alarm is activated. </p></span><span id="GD4"><p class="header2">Frost protection of the heating coil - water temperature sensor. Frost protection of cooling coil with glycol.</p><p class="poffset2">For frost protection, the water temperature in the coil is transmitted to the controller by a temperature sensor in a water return circuit of the coil. The controller always generates a signal to the valve motor that keeps a sufficient flow of hot water to protect the coil against frost. This frost protection is also activated when the running mode is  off .</p><p class="poffset2">If the water temperature falls below the set point temperature the fans stop, the dampers close, and an alarm is activated. </p><p class="poffset2">Cooling coil with chilled water is not provided with frost protection from the factory. Installer, service partner and/or user must take care of frost protection - for example with glycol.</p></span><span id="GD5"><p class="header2">Frost protection of the heating coil - water temperature sensor as well as capillary temperature sensor on the coil surface. Frost protection of cooling coil with glycol. </p><p class="poffset2">For frost protection, the water temperature in the coil is transmitted to the controller by a temperature sensor in a water return circuit of the coil. The controller always generates a signal to the valve motor that keeps a sufficient flow of hot water to protect the coil against frost. This frost protection is also activated when the running mode is  off .</p><p class="poffset2">If the water temperature falls below the set point temperature the fans stop, the dampers close, and an alarm is activated. </p><p class="poffset2">For additional frost protection, a mechanical thermostat with a capillary tube mounted on the surface of the coil will stop the fans directly if the temperature falls below the thermostat set-point. In addition it will cause a controlled shut down of the unit - dampers close and all other functions stop, and an alarm is activated.</p><p class="poffset2">Cooling coil with chilled water is not provided with frost protection from the factory. Installer, service partner and/or user must take care of frost protection - for example with glycol.</p></span><span id="GD6"><p class="header2">Frost protection of the heating coil - water temperature sensor. Frost protection of cooling coil with direct expansion of refrigerant.</p><p class="poffset2">For frost protection, the water temperature in the coil is transmitted to the controller by a temperature sensor in a water return circuit of the coil. The controller always generates a signal to the valve motor that keeps a sufficient flow of hot water to protect the coil against frost. This frost protection is also activated when the running mode is  off .</p><p class="poffset2">If the water temperature falls below the set point temperature the fans stop, the dampers close, and an alarm is activated. </p><p class="poffset2">Cooling coil with direct expansion of refrigerant is not provided with frost protection from the factory. Installer, service partner and/or user must take care of frost protection.</p></span><span id="GD7"><p class="header2">Frost protection of the heating coil - water temperature sensor as well as capillary temperature sensor on the coil surface. Frost protection of cooling coil with direct expansion of refrigerant. </p><p class="poffset2">For frost protection, the water temperature in the coil is transmitted to the controller by a temperature sensor in a water return circuit of the coil. The controller always generates a signal to the valve motor that keeps a sufficient flow of hot water to protect the coil against frost. This frost protection is also activated when the running mode is  off .</p><p class="poffset2">If the water temperature falls below the set point temperature the fans stop, the dampers close, and an alarm is activated. </p><p class="poffset2">For additional frost protection, a mechanical thermostat with a capillary tube mounted on the surface of the coil will stop the fans directly if the temperature falls below the thermostat set-point. In addition it will cause a controlled shut down of the unit - dampers close and all other functions stop, and an alarm is activated.</p><p class="poffset2">Cooling coil with direct expansion of refrigerant is not provided with frost protection from the factory. Installer, service partner and/or user must take care of frost protection.</p></span><span id="GD8"><p class="header2">Frost protection of change-over coil through water temperature sensor when controller is in heating mode. </p><p class="poffset2">Heating or cooling capacity is controlled by one valve with a modulating valve motor. The control signal is 2-10 V DC for the valve motor. </p><p class="poffset2">When the controller is in heating mode, the frost protection sequence is activated through the transmission of the water temperature in the coil to the controller by a temperature sensor in a water return circuit of the coil. The controller always generates a signal to the valve motor that keeps a sufficient flow of hot water to protect the coil against frost. This frost protection is also activated when the running mode is  off .</p><p class="poffset2">If the water temperature falls below the set point temperature the fans stop, the dampers close, and an alarm is activated. </p><p class="poffset2">The coil is not provided with frost protection from the factory when the controller is in cooling mode. Installer, service partner and/or user must take care of frost protection.</p><p class="poffset2">The controller delivers a signal for cooling or heating to the valve motor on the change-over coil. Or the alternative is that the signal is from an external central system to the valve motor for cooling or heating. </p></span><span id="GD9"><p class="header2">Electric heater</p><p class="poffset2">Separate controller for the electric heater is not installed in the switchboard but beside the heater in the same section as the heater. The main controller in the switchboard delivers a 0-10V DC signal for control of the heater capacity. The separate controller beside the heater converts the signal to the heating capacity required. The electric heater is not supplied from the air handling unit switchboard. No power supply cables are connected to the electric heater. The separate controller is without supply disconnecting device. </p></span><span id="GD10"><p class="header2">Electric heater and frost protection of cooling coil with glycol.</p><p class="poffset2">Separate controller for electric the heater is not installed in the switch board but beside the heater in the same section as the heater. The main controller in the switch board delivers a 0-10V DC signal for control of the heater capacity. The separate controller beside the heater converts the signal to the heating capacity requied. The electric heater is not supplied from the air handling unit switchboard. No power supply cables are connected to the electric heater. The separate controller is without supply disconnecting device. </p><p class="poffset2">Cooling coil with chilled water is not provided with frost protection from the factory. Installer, service partner and/or user must take care of frost protection - for example with glycol.</p></span><span id="GD11"><p class="header2">DV Cooler</p><p class="poffset2">The DV Cooler is a complete cooling compressor system cooling the supply air, and the system is installed in a separate section including a separate controller. The main controller in the switchboard delivers a 0-10V DC signal for control of the cooling capacity. The separate controller beside the compressor converts the signal to the cooling capacity required. The power supply for the DV Cooler is delivered from the switchboard. The separate controller is without safety cut-off switch.</p></span><span id="GD12"><p class="header2">DV Cooler and heating coil. Frost protection of the heating coil - water temperature sensor.</p><p class="poffset2">The DV Cooler is a complete cooling compressor system cooling the supply air and the system is installed in a separate section including a separate controller. The main controller in the switchboard delivers a 0-10V DC signal for control of the cooling capacity. The separate controller besides the compressor converts the signal to the cooling capacity required. The power supply for the DV Cooler is delivered from the switch board. The separate controller is without safety cut-off switch.</p><p class="poffset2">For the frost protection of the heating coil, the water temperature in the coil is transmitted to the controller by a temperature sensor in a water return circuit of the coil. The controller always generates a signal to the valve motor that keeps a sufficient flow of hot water to protect the coil against frost. This frost protection is also activated when the running mode is  off .</p><p class="poffset2">If the water temperature falls below the set point temperature the fans stop, the dampers close, and an alarm is activated. </p></span><span id="GD13"><p class="header2">DV Cooler and heating coil. Frost protection of the heating coil - water temperature sensor as well as capillary temperature sensor on the coil surface.</p><p class="poffset2">The DV Cooler is a complete cooling compressor system cooling the supply air and the system is installed in a separate section including a separate controller. The main controller in the switchboard delivers a 0-10V DC signal for control of the cooling capacity. The separate controller beside the compressor converts the signal to the cooling capacity required. The power supply for the DV Cooler is delivered from the switchboard. The separate controller is without safety cut-off switch.</p><p class="poffset2">For the frost protection of the heating coil, the water temperature in the coil is transmitted to the controller by a temperature sensor in a water return circuit of the coil. The controller always generates a signal to the valve motor that keeps a sufficient flow of hot water to protect the coil against frost. This frost protection is also activated when the running mode is  off .</p><p class="poffset2">If the water temperature falls below the set point temperature the fans stop, the dampers close, and an alarm is activated. </p><p class="poffset2">For additional frost protection, a mechanical thermostat with a capillary tube mounted on the surface of the coil will stop the fans directly if the temperature falls below the thermostat set-point. In addition it will cause a controlled shut down of the unit - the dampers close, and all other functions stop, and an alarm is activated.</p></span><span id="GD14"><p class="header2">DV Cooler and electric heating</p><p class="poffset2">The DV Cooler is a complete cooling compressor system cooling the supply air and the system is installed in a separate section including a separate controller. The main controller in the switchboard delivers a 0-10V DC signal for control of the cooling capacity. The separate controller beside the compressor converts the signal to the cooling capacity required. Power supply for the DV Cooler is delivered from the switchboard. The separate controller is without safety cut-off switch.</p><p class="poffset2">Separate controller for electric heater is not installed in the switch board but beside the heater in the same section as the heater. The main controller in the switchboard delivers a 0-10V DC signal for control of the heater capacity. The separate controller beside the heater converts the signal to the heating capacity required. The separate controller is without safety cut-off switch. </p></span><span id="GD15"><p class="header2">Cooling</p><p class="poffset2">Cooling coil with chilled water is not provided with frost protection from the factory. Installer, service partner and/or user must take care of frost protection - for example with glycol. </p><p class="poffset2">Cooling coil with direct expansion of refrigerant is not provided with frost protection from the factory. Installer, service partner and/or user must take care of frost protection.</p></span><span id="HD1"><p class="header2">Prepared for heating. Frost protection of the heating coil - water temperature sensor.</p><p class="poffset2">The unit is delivered with heating battery, and without valve and modulating valve motor. </p><p class="poffset2">The controller is prepared for control of valve motor, and signal as well as power for valve motor is available from terminals in the switchboard - a 2-10 V DC signal and power 24VAC.</p><p class="poffset2">For the frost protection of heating coil, the water temperature in the coil is transmitted to the controller by a temperature sensor in a water return circuit of the coil. The controller always generates a signal to the valve motor that keeps a sufficient flow of hot water to protect the coil against frost. This frost protection is also activated when the running mode is  off .</p><p class="poffset2">If the water temperature falls below the set point temperature the fans stop, the dampers close, and an alarm is activated.</p></span><span id="HD2"><p class="header2">2-way valve - heating coil</p><p class="poffset2">The heating coil capacity is controlled by a 2-way control valve with a modulating valve motor. </p><p class="poffset2">Cables between controller and valve motor as well as temperature sensor for frost protection have been installed at the factory and functions have been tested at the factory, ready for start-up on the site after installation of the valve, valve motor on the valve, and cables. We recommend that the control valve is always installed in the return pipe to the central heating system.</p></span><span id="HD3"><p class="header2">3-way valve - heating coil </p><p class="poffset2">The Heating coil capacity is controlled by a 3-way control valve with a modulating valve motor </p><p class="poffset2">Cables between controller and valve motor as well as temperature sensor for frost protection have been installed at the factory and functions have been tested at the factory, ready for start-up on the site after installation of the valve, valve motor on the valve, and cables. We recommend that the control valve is always installed in the return pipe to the central heating system.</p></span><span id="HD4"><p class="header2">Frese Optima - 2-way valve - heating coil</p><p class="poffset2">Intelligent 2-way control valve adjusting itself automatically to avoid exceeding the preset maximum flow. Even by fluctuating pressure in the system, the maximum flow is not exceeded for differential pressure up to 400 kPa. The flow is controlled very accurately due to the long 5.5 mm valve stroke. In practical terms, the OPTIMA valve ensures that there are no overflows and the valve has total control authority. The valve is delivered with the special OPTIMA actuator for the long valve stroke. Protection class IP44. Short-circuit-proof and protected against polarity reversal. </p><p class="poffset2">Cables between controller and valve motor as well as temperature sensor for frost protection have been installed at the factory and functions have been tested at the factory, ready for start-up on the site after installation of the valve, valve motor on the valve, and cables. We recommend that the control valve is always installed in the return pipe to the central heating system.</p></span><span id="ID1"><p class="header2">Prepared for cooling</p><p class="poffset2">The unit is delivered with cooling battery for chilled water, and without valve and modulating valve motor. </p><p class="poffset2">The controller is prepared for control of valve motor, and signal as well as power for valve motor is available from terminals in the switchboard - a 2-10 V DC signal and power 24VAC.</p><p class="poffset2">The cooling coil is not provided with frost protection from the factory. Installer, service partner and/or user must arrange for frost protection - for example with glycol. </p></span><span id="ID2"><p class="header2">2-way valve - cooling coil for chilled water</p><p class="poffset2">The cooling coil capacity is controlled by a 2-way control valve with a modulating valve motor. </p><p class="poffset2">Cables between controller and valve motor have been installed at the factory and functions have been tested at the factory, ready for start-up on the site after installation of the valve, valve motor on the valve, and cables. We recommend that the control valve is always installed in the return pipe to the chiller.</p></span><span id="ID3"><p class="header2">3-way valve - cooling coil for chilled water </p><p class="poffset2">The cooling coil capacity is controlled by a 3-way control valve with a modulating valve motor </p><p class="poffset2">Cables between controller and valve motor have been installed at the factory and functions have been tested at the factory, ready for start-up on the site after installation of the valve, valve motor on the valve, and cables. We recommend that the control valve is always installed in the return pipe to the central heating system.</p></span><span id="JD1"><p class="header2">Extra zone control - heating</p><p class="poffset2">The controller has been prepared for controlling an extra heating zone. The switchboard has been prepared for the connection of an additional room temperature sensor and control valve. The controller has been prepared for control of valve motor, and signal as well as power for valve motor is available from terminals in the switchboard - a 2-10 V DC signal and power 24VAC. Room temperature sensor, valve motor and valve are not included.</p></span><span id="JD2"><p class="header2">Extra zone control - cooling</p><p class="poffset2">The controller has been prepared for controlling an extra cooling zone. The switchboard has been prepared for the connection of an additional room temperature sensor and control valve. The controller has been prepared for control of valve motor, and signal as well as power for valve motor is available from terminals in the switchboard - a 2-10 V DC signal and power 24VAC. Room temperature sensor, valve motor and valve are not included. </p></span><span id="KD1"><p class="header2">No damper motor.</p><p class="poffset2">No damper motor delivered to open and close damper. </p></span><span id="KD2"><p class="header2">Damper - supply air, on-off motor.</p><p class="poffset2">The damper is opened and closed by an on/off damper motor - torque 20 Nm - running time 150 seconds.</p></span><span id="KD3"><p class="header2">Damper - supply air, spring-return motor.</p><p class="poffset2">The damper is opened and closed by a spring-return damper motor - torque 15 Nm - running time 150/16 seconds.</p></span><span id="KD4"><p class="header2">Manual damper control.</p><p class="poffset2">The damper is opened and closed manually with a handle inside the unit.</p></span><span id="LD1"><p class="header2">No damper motor</p><p class="poffset2">No damper motor delivered to open and close the damper. </p></span><span id="LD2"><p class="header2">Damper - extract or exhaust air, on-off motor</p><p class="poffset2">The damper is opened and closed by an on/off damper motor - torque 20 Nm - running time 150 seconds.</p></span><span id="LD3"><p class="header2">Damper - extract or exhaust air, spring-return motor</p><p class="poffset2">The damper is opened and closed by a spring-return damper motor - torque 15 Nm - running time 150/16 seconds.</p></span><span id="LD4"><p class="header2">Manual damper control.</p><p class="poffset2">The damper is opened and closed manually with a handle inside the unit.</p></span><span id="MD1"><p class="header2">No fire thermostats and/or fire detectors delivered</p><p class="poffset2">The unit is delivered without fire thermostats or other fire detectors. If fire thermostats or other fire detectors are installed later on, software in the controller can be activated by a qualified service technician for activation of fire protection sequences.</p></span><span id="MD2"><p class="header2">Fire function - thermostats</p><p class="poffset2">Two thermostats are installed in the unit - one in the extract air and one in the supply air. The cut-off temperature in the thermostats is adjustable between 40 and 70 degrees Celsius. At the factory supply is set at 70ÚC and extract is set at 40ÚC. The controller is as standard configured to stop the fans and close the dampers if a thermostat is released. On the site qualified technicians are able to change the configuration. </p></span><span id="MD3"><p class="header2">Fire function - prepared for activation by external signal for fire</p><p class="poffset2">At the factory the controller is as standard configured for the contacts in the activation devices to be normally closed when no fire is detected and to stop the fans and close the dampers when the function is activated - contacts are opened. On the site qualified technicians are able to change the configuration. Two terminals in the switchboard have been prepared for connection of the external signal for fire. </p></span><span id="MD4"><p class="header2">Fire function - thermostats and smoke detector in the extract air</p><p class="poffset2">Two thermostats have been installed in the unit - one in the extract air and one in the supply air. The cut-off temperature in the thermostats is adjustable between 40 and 70 degrees Celsius. At the factory supply is set at 70ÚC and extract is set at 40ÚC. The controller is as standard configured to stop the fans and close the dampers if a thermostat is released. On the site qualified technicians are able to change the configuration. </p><p class="poffset2">Furthermore a smoke detector has been installed in the extract air. If the detector is activated, the sequence mentioned above for the thermostats is activated.</p></span><span id="MD5"><p class="header2">Smoke detector in the extract air</p><p class="poffset2">A smoke detector has been installed in the extract air. The controller is as standard configured to stop the fans and close the dampers if the detector is activated. On the site qualified technicians are able to change the configuration.</p></span><span id="ND1"><p class="header2">No filter guard over supply air filter</p><p class="poffset2">No filter guard over supply air filter is installed.</p></span><span id="ND2"><p class="header2">Filter guard over supply air filter</p><p class="poffset2">Filter guard over supply air filter installed and connected to the controller for display of alarm when the mechanically set limit is exceeded.</p></span><span id="ND3"><p class="header2">Filter guard over prefilter and primary filter in supply air</p><p class="poffset2">Filter guard over prefilter and primary filter installed and connected to the controller for display of alarm when the mechanically set limit is exceeded.</p></span><span id="OD1"><p class="header2">No filter guard over extract air filter</p><p class="poffset2">No filter guard over extract air filter is installed.</p></span><span id="OD2"><p class="header2">Filter guard over primary filter in extract air</p><p class="poffset2">Filter guard over primary air filter installed and connected to the controller for display of alarm when the mechanically set limit is exceeded.</p></span><span id="OD3"><p class="header2">Filter guard over prefilter and primary filter in extract air</p><p class="poffset2">Filter guard over prefilter and primary filter installed and connected to the controller for display of alarm when the mechanically set limit is exceeded.</p></span><span id="PD1"><p class="header2">No damper motor on recirculation damper</p><p class="poffset2">No damper motor delivered to open and close the recirculation damper. </p></span><span id="PD2"><p class="header2">On-off damper motor on recirculation damper. Recirculation via extra time schedule. </p><p class="poffset2">On/off damper motor - torque 20 Nm - running time 150 seconds. Recirculation controlled via extra time schedule in the controller. Full recirculation or no recirculation according to time settings in the schedule. Please note - not modulating damper motors. </p></span><span id="PD3"><p class="header2">On-off damper motor on recirculation damper. Recirculation via digital input. </p><p class="poffset2">On/off damper motor - torque 20 Nm - running time 150 seconds. Full recirculation by digital input and no recirculation by no digital input. Please note - not modulating damper motors. The switchboard is prepared with terminals for connection of the digital input.</p></span><span id="PD4"><p class="header2">On-off damper motor on recirculation damper. Recirculation via extra time schedule + digital input. </p><p class="poffset2">On/off damper motor - torque 20 Nm - running time 150 seconds. Recirculation controlled via extra time schedule in the controller and digital input. Full recirculation according to time settings in the schedule and digital input. No recirculation according to time settings in the schedule and no digital input. Please note - not modulating damper motors. The switchboard is prepared with terminals for connection of the digital input.</p></span><span id="PD5"><p class="header2">On-off damper motor on recirculation damper. On/off recirculation. </p><p class="poffset2">On/off damper motor - torque 20 Nm - running time 150 seconds. Recirculation controlled via 1 - 2 room temperature sensors and the time schedule in the controller. Please note - not modulating damper motors. </p></span><span id="PD6"><p class="header2">Spring-return damper motor on recirculation damper. Recirculation via extra time schedule. </p><p class="poffset2">Spring-return damper motor - torque 15 Nm - running time 150/16 seconds. Recirculation controlled via extra time schedule in the controller. Full recirculation or no recirculation according to time settings in the schedule. Please note - not modulating damper motors.</p></span><span id="PD7"><p class="header2">Spring-return damper motor on recirculation damper. Recirculation via digital input. </p><p class="poffset2">Spring-return damper motor - torque 15 Nm - running time 150/16 seconds. Full recirculation by digital input and no recirculation by no digital input. Please note - not modulating damper motors. The switchboard is prepared with terminals for connection of the digital input.</p></span><span id="PD8"><p class="header2">Spring-return damper motor on recirculation damper. Recirculation via extra time schedule + digital input. </p><p class="poffset2">Spring-return damper motor - torque 15 Nm - running time 150/16 seconds. Recirculation controlled via extra time schedule in the controller and digital input. Full recirculation according to time settings in the schedule and digital input. No recirculation according to time settings in the schedule and no digital input. Please note - not modulating damper motors. The switchboard is prepared with terminals for connection of the digital input.</p></span><span id="PD9"><p class="header2">Spring-return damper motor on recirculation damper. On/off recirculation. </p><p class="poffset2">Spring-return damper motor - torque 15 Nm - running time 150/16 seconds. Recirculation controlled via 1 - 2 room temperature sensors and the time schedule in the controller. Please note - not modulating damper motors.</p></span><span id="QD1"><p class="header2">No external room temperature sensors</p><p class="poffset2">No external room temperature sensors are delivered.</p></span><span id="QD2"><p class="header2">One external room temperature sensor</p><p class="poffset2">One external room temperature sensor is included. The switchboard has been prepared with additional terminals for connection of the room temperature sensor. The sensor is delivered without cable.</p></span><span id="QD3"><p class="header2">Two external room temperature sensors</p><p class="poffset2">Two external room temperature sensors are included. The switchboard has been prepared with additional terminals for connection of the room temperature sensors. The sensors are delivered without cable. The controller calculates an average of the value from the 2 sensors as input for the control.</p></span><span id="RD1"><p class="header2">Communication to BMS systems with TCP/IP(WEB)</p><p class="poffset2">The controller has been prepared for WEB communication via the TCP/IP port to a BMS system (Building Management System). The controller can work as a stand-alone system without any support from other controllers. </p></span><span id="RD2"><p class="header2">Communication to BMS systems with LON</p><p class="poffset2">The controller has been prepared for communication via LON communication port to a BMS system (Building Management System)</p><p class="poffset2">The port uses LonWorks according to the LonMark-guidelines. The LON-interface variables are available from Systemair. The controller can work as a stand-alone system without any support from other controllers. </p></span><span id="RD3"><p class="header2">Communication to BMS systems with MODBUS</p><p class="poffset2">The controller has been prepared for communication via RS485 communication port to a MODBUS based BMS system (Building Management System) </p><p class="poffset2">The controller can work as a stand-alone system without any support from other controllers.</p></span><span id="SC1"><p class="header2">Free cooling</p><p class="poffset2">A temperature sensor has been installed inside the unit in the outdoor air entrance. If the outdoor temperature after midnight is below the room temperature set point and the actual average room temperature is above the set point temperature, the fans start during the summer to cool down the building during night hours.</p></span><span id="SC2"><p class="header2">Cooling recovery</p><p class="poffset2">If the extract air temperature is lower than the outdoor air temperature, and there is a cooling demand in the rooms, the cooling recovery will be activated. The heat exchanger signal is reversed to give increasing cooling recovery on increasing demand.</p></span><span id="SC3"><p class="header2">Repeater for the Systemair Control Panel</p><p class="poffset2">If the distance between controller and control panel is larger than the 10 metres of cable from the control panel, the repeater EO-R is necessary. Up to 1200 m cable length between the controller and the repeater is possible. The distance between the repeater and the control panel is restricted to the 10 metres of cable from the control panel. </p><p class="poffset2">The repeater with one control panel is able to control 6 units with a controller - Systemair E28 - in each unit. The repeater must be supplied with power - 24 V AC - from the controller in the switchboard. The minimum quality of the cable between controller and repeater must at least be - shielded twisted 4x0.6 mm2. This cable is not delivered by Systemair. The protection class for the repeater is IP20.</p></span><span id="SC4"><p class="header2">Extended running</p><p class="poffset2">A digital input - just to pressing a button - can force the unit to start although the timer says the running mode should be  off . The unit will run for the set time. The switchboard has been prepared with additional terminals for the connection of cable. Cable and button are not delivered by Systemair</p></span><span id="SC5"><p class="header2">Hand terminal - Systemair Control Panel</p><p class="poffset2">The separate cable-connected (10m) hand terminal with display and buttons - the Systemair Control Panel - is always necessary for the normal handling and programming, because the controller - Systemair E28 - is without display and buttons.</p><p class="poffset2">The Systemair Control Panel can control one unit directly or via the repeater - EO-R, the Systemair Control Panel can control up to 6 units with a controller - Systemair E28 - in each unit.</p></span><span id="SC6"><p class="header2">Alarm signal</p><p class="poffset2">By alarm there is 24 VAC on terminals in the switchboard for a lamp. Cable and lamp are not delivered by Systemair.</p><p class="poffset2"> </p><p class="poffset2"> </p><p class="poffset2"> </p><p class="poffset2"> </p><p class="poffset2"> </p></span></body></html>