Paul NOVUS 300 Operating instructions

Version: 2.0_10/2015
Service instructions for qualified personnel
Mechanical Ventilation Heat Recovery Unit
NOVUS (F) 300 / 450
(for units from serial no. 15000-2)

Table of Contents
2
Table of Contents
Table of Contents .............................................................................................................................................. 2
1 Type plate.............................................................................................................................................. 3
2 Principal configuration of the system ................................................................................................... 4
3 Replacement of the filters..................................................................................................................... 5
3.1 Replacement of the filters of the device............................................................................................... 5
3.2 Resetting the filter run-time ................................................................................................................. 7
4 Replacement of the heat exchanger ..................................................................................................... 9
5 Replacement of the integrated defroster ........................................................................................... 13
6 Replacement of the master board, slave board and BUS thermostat ................................................ 19
7 Replacement of the fan....................................................................................................................... 25
8 Replacement of the bypass motor...................................................................................................... 30
9 Installation of a condensate drain....................................................................................................... 37
10 Messages, errors and error handling .................................................................................................. 40
10.1 Error signalling by means of the LED control panel ............................................................................ 40
10.2 Visualisation of errors with the TFT touch panel ................................................................................ 41
11 Error handling...................................................................................................................................... 43
11.1 Error fan .............................................................................................................................................. 43
11.2 Error temperature sensor ................................................................................................................... 44
11.3 Communication error defroster, back heater, geothermal heat exchanger ...................................... 45
11.4 Communication error fan slave........................................................................................................... 46
11.5 TFT without communication ............................................................................................................... 47
11.6 Error bypass with TFT.......................................................................................................................... 48
11.7 Error intake air too low ....................................................................................................................... 49
11.8 Error supply air too low....................................................................................................................... 50
11.9 Fan too noisy ....................................................................................................................................... 51
11.10 Heat recovery too low......................................................................................................................... 52
11.11 Failure or problems without a message.............................................................................................. 53
Appendix.......................................................................................................................................................... 54
Appendix 1 Circuit diagram NOVUS ............................................................................................................... 54
Appendix 2 Circuit diagram NOVUS with integrated defroster ..................................................................... 55
Appendix 3 Terminal scheme of through terminal X10................................................................................. 56
Notes ............................................................................................................................................................. 57

Type plate
3
1Type plate
The type plate clearly identifies the product. The information on the type plate are required for the safe use
of the product and regarding service queries. The type plate is located on the side of the air connections of
the HRU. The type plate must be permanently attached to the product.
Type plate NOVUS 300 Type plate NOVUS F 300
Type plate NOVUS (F) 450

Principal configuration of the system
4
2Principal configuration of the system
The basic configuration of the system is universally valid and does not represent the system
outline of the project-related ventilation plant! It is designed for representation of the plant-
specific system structure for sensors and ventilation equipment.
General system outline with NOVUS with integrated defroster, version LEFT

Replacement of the filters
5
3Replacement of the filters
3.1 Replacement of the filters of the device
1. Switch the device to standby mode or disconnect it from the power supply.
2. Pull the maintenance flap with the magnetic clamps from the front plate.
3. Pull the filter cover cap out of the filter slide-in compartment. In order to do so, put the finger in the
respective recessed grip of the filter cover cap.

Replacement of the filters
6
4. Pull the filters out of the filter slide-in compartments by means of the filter strap.
5. Package the filters in a sealed bag and put this in the residual waste.
6. Push the new filters in the filter slide-in compartments with regard to the flow direction.
The filters are marked with an arrow according to the required flow direction.
Pollen filters are to be inserted in the filter slide-in compartment of the intake air connection
according the device version (see type plate) and marked with the symbol:

Replacement of the filters
7
7. Insert the filter cover caps. Make sure that the recessed grips of both filter cover caps face each other
in the filter slide-in compartment.
8. Close the inspection opening of the front hood with maintenance flap.
9. Re-establish the mains connection.
3.2 Resetting the filter run-time
Once the filter has been changed, the counter for the filter run-time must be reset. Resetting the filter run-
time can be performed using the respectively connected control unit or the digital input signal
(programmable with PC software as special solution).
1. Resetting the filter run-time by means of the LED control panel
Symbol
Designation
Explanation / actions
LED 10
Signalling
Filter run-time
When the LED 10 lights up, the filter run-time has expired and a
filter check shall be performed.
Key
Reset
Filter run-time
By pressing this key for at least 3 s, the filter run-time is reset.
The LED 10 goes off. The timer starts the set filter run-time.
Tab. 1: Resetting the filter run-time by means of the LED control panel
2. Resetting the filter run-time by means of the TFT touch panel
Symbol
Designation
Explanation / actions
Signalling
Filter run-time
expired
In case the filter run-time has expired, the message “Replace
filter” is generated, signalling that the filter must be checked.
Button
Menu mode
By touching the button Menu mode, you reach the main
menus
Buttons
Navigation
Select the main menu Settings by touching the Navigation
buttons and confirm by pressing the Enter button.
recessed grips

Replacement of the filters
8
Buttons
Navigation
Select the submenu Filter by touching the Navigation buttons
and confirm by pressing the Enter button.
Button
Checkmark
By touching the Checkmark button, resetting of the filter run-
time is selected.
Button
Enter
Confirm by pressing the Enter button.
Button
Cancel / back
By touching the Cancel / back button, exit the menu levels until
the start menu appears.
Table 2: Step sequence resetting the filter run-time by means of the TFT touch panel

Replacement of the heat exchanger
9
4Replacement of the heat exchanger
1. Disconnect the device from the power supply.
2. Pull the maintenance flap with the magnetic clamps from the front plate.

Replacement of the heat exchanger
10
3. According to the sequence of steps, pull the front hood in the area of the two spring shackles (on the
front bottom side of the device) off the device by approx. 5 cm first. Then, slide the front hood
towards the supply air duct connections out of the slotted openings (on the front surface of the
device).
4. Pull the EPP foam cover of the heat exchanger by means of the strap out of the foam housing. In doing
so, grasp the strap on the fastening in the area of the recessed grips of the foam covering holder.

Replacement of the heat exchanger
11
5. Now pull the heat exchanger by means of the strap from the EPP housing.
6. Spray silicone spray on the saeals of the heat exchanger.

Replacement of the heat exchanger
12
7. On the bottom of the heat exchanger is a condensate pan with 2 cut-outs. When inserting the heat
exchanger into the unit, please assure that the two cut-outs of the condensate pan point to the
condensate outlet.
8. Afterwards, mount all parts in reverse order.
9. Re-establish the mains connection.
10. Adjust the settings to the respective heat exchanger (using the TFT display).
Menu = Setup = frost protection mode
eco (energy saving) 
secure 
Moisture heat exchanger 
Menu = Setup = password: “55555” = frost protection mode = temperatures:
Standard heat exchanger HRV: eco: -2°C
save: 0°C
Enthalpy heat exchanger ERV: -8°C

Replacement of the integrated defroster
13
5Replacement of the integrated defroster
1. Disconnect the device from the power supply.
2. Apply for work on the electronics an ESD wrist strap.
3. Pull the maintenance flap with the magnetic clamps from the front plate.

Replacement of the integrated defroster
14
4. According to the sequence of steps, pull the front hood in the area of the two spring shackles (on the
front bottom side of the device) off the device by approx. 5 cm first. Then, slide the front hood
towards the supply air duct connections out of the slotted openings (on the front surface of the
device).
5. Pull the EPP foam cover of the heat exchanger by means of the strap out of the foam housing. In doing
so, grasp the strap on the fastening in the area of the recessed grips of the foam covering holder.

Replacement of the integrated defroster
15
6. Now pull the heat exchanger by means of the strap from the EPP housing.
7. Remove the electronics cover, open the 6 screws.

Replacement of the integrated defroster
16
8. Slide the PVC pipe forwardly out of the EPP housing.
9. Disconnect the power cable of the PTC elementes from the BUS thermostat.

Replacement of the integrated defroster
17
10. Remove the power cabel out of the cable guide (groove).
11. Loosen the two screws on the PTC element.
12. Push together the PTC element at the rear part and remove it out of the EPP hosing.
1.
2.

Replacement of the integrated defroster
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13. Insert the new PTC element.
14. Afterwards, mount all parts in reverse order.
When inserting the heat exchanger into the unit, please assure that the two cut-outs of the
condensate pan point to the condensate outlet (see point 4.).
15. Re-establish the mains connection.

Replacement of the master board, slave board and BUS
thermostat
19
6Replacement of the master board, slave board and BUS thermostat
1. Read the program with a PC or write down the settings of the TFT.
2. Disconnect the device from the power supply.
3. Apply for work on the electronics an ESD wrist strap.
4. Pull the maintenance flap with the magnetic clamps from the front plate.

Replacement of the master board, slave board and BUS
thermostat
20
5. According to the sequence of steps, pull the front hood in the area of the two spring shackles (on the
front bottom side of the device) off the device by approx. 5 cm first. Then, slide the front hood
towards the supply air duct connections out of the slotted openings (on the front surface of the
device).
6. Remove the electronics cover, open the 6 screws.