SAVE VTR 500

Disposal and recycling

This product is applicable to the WEEE directive. When disposing the unit, follow your local rules and regulations.

This product packing materials are recyclable and can be reused. Do not dispose in household waste.

Warnings

⚠️ Danger

• Make sure that the mains supply to the unit is disconnected before performing any maintenance or electrical work!
• All electrical connections and maintenance work must be carried out by an authorized installer and in accordance with local rules and regulations.

⚠️ Warning

• The system should operate continuously, and only be stopped for maintenance/service.
• The installation of the unit and complete ventilation system must be performed by an authorized installer and in accordance with local rules and regulations.
• Beware of sharp edges during mounting and maintenance. Use protective gloves.
• Although the mains supply to the unit has been disconnected, there is still risk for injury due to rotating parts that have not come to a complete standstill.
• Make sure that filters are mounted before starting the unit.
• This product must only be operated by a person with suitable knowledge or education within this field or carried out with the supervision of a suitably qualified person.

⚠️ Caution

• Do not connect tumble dryers to the ventilation system.
• Duct connections/duct ends must be covered during storage and installation.

Product description

The SAVE VTR 500 is a heat recovery ventilation unit with a built-in rotating heat exchanger. The SAVE VTR 500 is suitable for houses with up to 400 m² heated living area. It supplies filtered outdoor air to residential areas and extract air from bathroom, kitchen, and wet rooms.

SAVE VTR 500 is equipped with a 1670 W electrical re-heater battery.

Left and Right models

There are two model options: right (R) and left (L) model. The different models are recognized by the placing of the internal components and the supply air outlet, which is situated on the left side of the unit on an (L) unit and on the right hand side on an (R) unit.

Note: This document describes a left (L) model. The inside of a right (R) model is mirrored.

Configuration

Connect the unit electrically to the mains with the enclosed plug and check that it starts up correctly. The control panel is used to make the necessary adjustments. An external control panel can be connected on the top of the unit.

Control panel

The illustration below shows the control panel with a short description.

Fig. 1 Control panel: Depicts a rectangular control panel with a digital display (1), a rotary selection knob (2), an ENTER button (3), and a RETURN button (4).

Display symbols

Symbol: Temp

Illustrates the current set-point for supply air temperature (from completely empty to filled symbol). Turn the SELECTION knob to choose temperature. Press ENTER to save the setting.

Symbol: Airflow

Illustrates the current airflow. The airflow can be set manually in 5 steps: Off, Low, Nom, High and Auto. Turn the SELECTION knob to choose airflow. Press ENTER to save the setting.

Airflow steps: A. Ventilation off, B. Low ventilation, C. Nominal ventilation, D. Maximum ventilation, E. Auto ventilation.

Symbol: Service

Press ENTER to access the service menu.

Symbol: Alarm

Press ENTER to access the alarm list.

Note: The fan can be set to OFF by activating manual fan stop. See service menu description under functions.

Important: It is not recommended to activate manual fan stop (set fan to OFF) in standard households. If manual fan stop is activated, the unit should be provided with dampers in exhaust and fresh air ducts to avoid cold draught and risk of condensation when the unit has been stopped.

Setting the temperature

The supply air temperature is set manually in steps of 1 K in the main menu display by choosing the temperature symbol.

If an electrical re-heater is installed, the temperature setpoints are: 12-22 °C. For installed water re-heater, the setpoints are: 12-40 °C.

If the re-heater is deactivated, the temperature steps are: 15-19 °C. Default value: 15.0 °C. Each temperature step is illustrated by increasing the filling of the temperature symbol and the temperature is shown in the display.

An unfilled temperature symbol will activate manual summer mode. See chapter 4.5.

Manual setting of airflow

It is possible, at any time, to manually set the airflow in the main menu display. By choosing the fan symbol and confirming, it is possible to increase or decrease the airflow in 5 steps: Off, Low, Nom, High and Auto. By doing so, you override the programmed week schedule for the unit until the end of the present time period in the week program (chapter 4.4).

Warning: It is not recommended to activate manual fan stop (set fan to OFF) in standard households. If manual fan stop is activated, the unit should be provided with dampers in exhaust and fresh air ducts to avoid cold draught and risk of condensation when the unit has been stopped. The fan can be set to OFF by activating manual fan stop. See the Installation and Service manual, chapter Service menu overview: Manual fan stop.

Programming the Week schedule

Set the week schedule according to the below procedure:

1. Go to the service menu by using the SELECTION knob.
2. Enter the service level by typing the password, default 1111. Use the SELECTION knob for each digit and confirm with the ENTER button after each set digit and choose "NO" for the system not to be locked.
3. Go to: Week program
4. Choose Week program again.
5. Set week day and time you want the unit to be in ON level. Two periods per day can be programmed. The rest of the time the unit will be in OFF level.
6. Go back to the previous dialogue frame with the RETURN button and go down to Airflow.
7. Set which airflow the fan is supposed to be running in the ON level, choose between Low, Nom, High or Auto. Set which airflow the fan is supposed to be running in the OFF level, choose between OFF, Low, Nom or High.
8. Step back with the RETURN button until you reach the main menu display.

Note: If an electrical re-heater battery is installed and active and the unit is shut down from the control panel, for example by choosing OFF. When the unit is in OFF level in the week program, the fans will continue to run for 3 minutes, to prevent the heater from triggering the over heat protection sensor, before they stop.

Manual and automatic summer mode

Manual summer mode occurs if no temperature step is selected. The temperature symbol on the main menu is then completely empty.

If the electrical re-heater is activated, it will switch off during manual summer mode. Manual summer mode goes automatically to step 1 (setpoint 12 °C) after two minutes if the supply air temperature is +5 °C or below.

If a water heater battery is installed and activated, the manual summer mode goes automatically to step 1 (setpoint 12 °C) if the outdoor air or supply air temperature is +5 °C or below.

The unit will automatically alternate between winter operation with heat recovery and summer operation without heat recovery.

Maintenance of the unit

Maintenance of the SAVE VTR 500 should normally be performed 3 - 4 times a year.

Warnings

⚠️ Danger

• Make sure that the mains supply to the unit is disconnected before performing any maintenance or electrical work!
• All electrical connections and maintenance work must be carried out by an authorized installer and in accordance with local rules and regulations.

⚠️ Warning

• The system should operate continuously, and only be stopped for maintenance/service.
• Although the mains supply to the unit has been disconnected, there is still risk for injury due to rotating parts that have not come to a complete standstill.
• Beware of sharp edges during maintenance. Use protective gloves.
• Make sure that filters are mounted in their place before running the system.
• This product must only be operated by a person with suitable knowledge or education within this field or carried out with the supervision of a suitably qualified person.

Open the front hatch

⚠️ Danger

Make sure that the Mains supply to the unit is disconnected before performing any maintenance or electrical work!

1. Open the locks on top and at the bottom of the front hatch.

2. Open the hatch.

Changing filters

⚠️ Danger

Make sure that the Mains supply to the unit is disconnected before performing any maintenance or electrical work!

The filters are to be changed every 6/9/12/15 months, default value is 12 months. When the filters have been changed, the filter timer must be reset. See chapter 5.4.

The factory installed filters are of filter quality F7 for the supply air and G3 for the extract air filter. The filters need to be replaced when polluted. New sets of filters can be acquired from your installer or wholesaler.

Filter quality G3 can be installed for supply air filtering. The filter type is labelled on the top of the filter.

⚠️ Caution

If the filter types are changed, the heat recovery system may need re-configuration to function optimally. If type G3 filters are used instead of F7, the system curve for Supply Fan (SF) must be changed: For G3 type filter: 11–20, for F7 type filter: 1–10. See Installation and Service Instruction.

Fig. 2 Extract and supply air filters: Shows a diagram of the unit's interior, highlighting the extract and supply air filters.

1. Stop the unit by disconnecting the mains.
2. Open the front hatch. See chapter 5.2.
3. Pull out the filters towards you. Some force may be needed.
4. Insert the new filters. Make sure that the correct filter types are inserted.
5. Close and lock the front hatch and connect the unit to mains.
6. Reset the filter time. See chapter 5.4.

Resetting the filter time

1. Go to the service menu by using the selection knob.

2. Enter the service level by typing the password. Use the SELECTION knob for each digit and confirm with the ENTER button after each set digit and choose "NO" for the system not to be locked.

3. Go to: Filter period, press ENTER.

Choose: Reset: YES with the SELECTION knob and then ENTER. Change, if necessary, Time to replace X month, to the time of your choice with the SELECTION knob and then press ENTER.

Press the RETURN button until you reach the main menu.

Checking and cleaning the heat exchanger

⚠️ Danger

Make sure that the Mains supply to the unit is disconnected before performing any maintenance or electrical work!

Fig. 3 Heat exchanger: Illustrates the heat exchanger unit within the main appliance housing.

⚠️ Warning

Risk of personal injury! The heat exchanger weighs about 16 kg. There is a risk that the heat exchanger falls out of the unit. Make sure that small children are not beneath the unit when the heat exchanger is removed!

Even if the required maintenance is carried out, dust will build up in the exchanger block. It is therefore of vital importance for the upkeep of a high efficiency that the exchanger block is removed from the unit and cleaned periodically as described below. Clean the heat exchanger at least every 3 years or when required.

1. Stop the unit by disconnecting the mains.
2. Open the front hatch. See chapter 5.2.
3. Disconnect the heat exchanger power supply and the rotor sensor. Both cables are found beside the heat exchanger.

4. ⚠️ Warning

   Risk of personal injury! The heat exchanger weighs about 16 kg. There is a risk that the heat exchanger falls out of the unit. Pull out the heat exchanger. Some force may be needed.

5. Clean the rotor. Wash in hot soapy water. Do not use detergent containing ammonia. Rinse using, for instance, a shower handle or carefully with compressed air.

6. ⚠️ Warning

   Ensure the rotor motor is not exposed to moisture.

7. Remount the heat exchanger. Don't forget to reconnect the heat exchanger power and sensor cables.
8. Close and lock the front hatch and connect the unit to mains.

Cleaning the fans

⚠️ Danger

Make sure that the Mains supply to the unit is disconnected before performing any maintenance or electrical work!

The extract air fan is accessed by opening the front hatch. The supply air fan is accessed by opening the side hatch.

The motor bearings are life time lubricated and maintenance free.

Even if the required maintenance, such as changing of filters is carried out, dust and grease may slowly build up inside the fans. This will reduce the efficiency.

The fans may be cleaned as described below.

1. Stop the unit by disconnecting the mains.
2. Open the front hatch. See chapter 5.2.
3. Loosen the screws securing the side hatch and open it.
4. Disconnect the fan power cables. The cables are found beside the fans.
5. Loosen the screws to the brackets holding the fans (1).
6. Remove the brackets.
7. Pull the fans towards you.
8. Clean the fans with a cloth or a soft brush. Do not use water. White spirit can be used to remove obstinate deposits. Allow the fans to dry properly before remounting.
9. Remount the fans.
10. Remount and tighten the brackets.
11. Don't forget to reconnect the fan power cables.
12. Close and lock the front and side hatch and connect the unit to mains.

Replacing rotor drive belt

⚠️ Danger

Make sure that the Mains supply to the unit is disconnected before performing any maintenance or electrical work!

If the alarm Rotor is raised, the rotor drive belt may be damaged or broken, see chapter 7.1.

Fig. 4 Rotor drive belt: Shows a diagram of the rotor drive belt mechanism and its connection points.

The rotor drive belt (1) can be acquired from your installer or wholesaler. The replacement drive belt is adjustable and delivered with a nipple attached in one end.

1. Stop the unit by disconnecting the mains.
2. Open the front hatch. See chapter 5.2.
3. Remove the broken drive belt.
4. Use tape to attach the drive belt to the rotating heat exchanger, and rotate the exchanger by hand to get hold of the drive belt.
5. Remove the tape and put the "empty" end on to the nipple.
6. Press the ends firmly towards each other to secure the nipple.
7. Pull the drive belt on to the belt pulley and rotate the exchanger by hand. Check that the belt pulley rotates.
8. Note: If the drive belt slips, the drive belt may be too long and needs to be shortened. Cut the drive belt 5 mm and go to step 6.
9. Close and lock the front hatch and connect the unit to mains.
10. Check that the alarm has ceased on the Control Display.
11. Note: If the alarm remains, contact the installer.

Overheat protection reset button

If the supply air temperature is low, it can indicate that the overheat protection is triggered. The overheat protection can be reset by pressing the reset button (1).

Fig. 5 Overheat protection reset button: Depicts a diagram of the unit's interior, indicating the location of the overheat protection reset button.

1. Stop the unit by disconnecting the mains.
2. Open the front hatch. See chapter 5.2.
3. Loosen the screws securing the side hatch and open it.
4. Press the reset button (1).
5. Close and lock the front and side hatch and connect the unit to mains.

Duct system maintenance

Cleaning extract louvres and supply air diffusers

The system supplies fresh air to your home and extracts the used indoor air via the duct system and diffusers/louvres. Diffusers and louvres are mounted in ceilings/walls in bedrooms, living room, wet rooms, WC etc. Remove diffusers and louvres and wash in hot soapy water as required (diffusers/louvres must not be exchanged). Cleaning of diffusers/louvres can be done as necessary.

Fig. 6 Diffusers and louvres: Illustrates various types of air diffusers and louvres used in ventilation systems.

Checking the outdoor air intake

Leaves and pollution could plug up the air intake grille and reduce the capacity. Check the air intake grille, and clean as necessary. It is recommended to do this at least twice a year.

Fig. 7 Intake grill: Shows an illustration of an outdoor air intake grill.

Checking the roof cowl (if fitted)

The roof cowl (if fitted) connected to the exhaust air duct needs to be checked at least twice a year and cleaned if necessary.

Checking and cleaning the duct system

Dust and grease deposits may build up in the duct system, even if required maintenance such as changing of filters is being carried out. This will reduce the efficiency of the installation.

The duct runs should therefore be cleaned/changed when necessary. Steel ducts can be cleaned by pulling a brush soaked in hot soapy water through the duct via diffuser/louvre openings or special inspection hatches in the duct system (if fitted).

It is recommended to do this every 5 years and is normally carried out by authorized companies specialized in this area.

Fig. 8 Cleaning duct system: Depicts a person cleaning a ventilation duct.

Trouble shooting

A warning triangle with text in the display indicates an alarm. Turn menu selector to the warning triangle and press confirm twice to view the alarm.

⚠️ Danger

Make sure that the mains supply to the unit is disconnected before performing any maintenance or electrical work on the unit!

Alarm list

Type label

Before calling your service representative, make a note of the specification and production number from the type label, which can be found on the side of the units, next to the external connections.

Fig. 9 Type label: Shows a diagram of the unit's type label with numbered positions for product information.

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

Systemair UAB
Linù st. 101
LT-20174 Ukmergè, LITHUANIA
Phone +370 340 60165
Fax +370 340 60166
www.systemair.com