nilan Compact P User manual

INSTALLATION INSTRUCTIONS
Compact P / Compact P Polar EK
CTS602 HMI BY NILAN
Version 4.00 - 01.07.2020
M24_Compact-P-EK_GB

2
Table of contents
General information
Safety ............................................................................................................................................................................................................ 4
Power supply ......................................................................................................................................................................................... 4
Heat pump domestic hot water ......................................................................................................................................................... 4
Water quality requirements ...................................................................................................................................................................... 4
Requirements for water quality ........................................................................................................................................................ 4
Introduction .................................................................................................................................................................................................. 5
Documentation ..................................................................................................................................................................................... 5
Unit type ....................................................................................................................................................................................................... 6
Product description .............................................................................................................................................................................. 6
The unit ................................................................................................................................................................................................... 7
Temperature sensor overview .......................................................................................................................................................... 8
Dimensional drawing ............................................................................................................................................................................ 8
Accessories .................................................................................................................................................................................................. 9
Electrical pre-heating element for frost protection of the unit ................................................................................................... 9
Electrical after-heating element for duct installation ................................................................................................................... 9
EM-box .................................................................................................................................................................................................... 9
DTBU damper ........................................................................................................................................................................................ 9
CO2-sensor ............................................................................................................................................................................................ 9
Safety group ........................................................................................................................................................................................10
Safety group with scalding protection ...........................................................................................................................................10
Extension cable HMI user panel for 8-pin connector ...................................................................................................................10
Cover plate HMI user panel ...............................................................................................................................................................10
Vibration absorbers ...........................................................................................................................................................................10
Flexible sound damper .......................................................................................................................................................................11
Pollen filter ...........................................................................................................................................................................................11
Trolley ...................................................................................................................................................................................................11
Installation
Assembly ....................................................................................................................................................................................................12
Transport into the dwelling ..............................................................................................................................................................12
Positioning of unit ...............................................................................................................................................................................12
Electrical installation
Safety ...................................................................................................................................................................................................13
Connections overview .......................................................................................................................................................................13
HMI User panel ...........................................................................................................................................................................................14
Moving the user panel .......................................................................................................................................................................14
Wall bracket .........................................................................................................................................................................................14
Electrical connections unit ......................................................................................................................................................................15
Compact P unit ....................................................................................................................................................................................15
Electrical connections accessories ........................................................................................................................................................16
User programe 1 .................................................................................................................................................................................16
Modbus .................................................................................................................................................................................................16
External pre-heating element ..........................................................................................................................................................17
Electrical after-heating element .....................................................................................................................................................18
CO2 sensor ...........................................................................................................................................................................................19
User programe 2 .................................................................................................................................................................................21
EM-box (damper solution) .................................................................................................................................................................22
DTBU damper solution .......................................................................................................................................................................23
Fire thermostat / external fire automation system ....................................................................................................................24
External heat supply ..........................................................................................................................................................................25
Plumbing installation
Condensate drain ......................................................................................................................................................................................26
Important information .......................................................................................................................................................................26
Hot water tank ...........................................................................................................................................................................................27
Connection overview .........................................................................................................................................................................27
Connection ...........................................................................................................................................................................................27
Requirements for water quality ......................................................................................................................................................28
Hot water circulation .........................................................................................................................................................................28
Solar coil ...............................................................................................................................................................................................28
Softened water ...................................................................................................................................................................................28
Electric boiler .............................................................................................................................................................................................29
Connection overview .........................................................................................................................................................................29
Diagram ................................................................................................................................................................................................29
Plumbing connections for accessories ..................................................................................................................................................30
Safety group ........................................................................................................................................................................................30
Safety group with anti-scald protection ........................................................................................................................................31

3
Ventilation installation
Duct system ............................................................................................................................................................................................... 32
Legislation ........................................................................................................................................................................................... 32
Ducts .................................................................................................................................................................................................... 32
Ventilation unit ................................................................................................................................................................................... 32
Extract air ............................................................................................................................................................................................ 33
Supply air ............................................................................................................................................................................................. 33
Roof terminals .................................................................................................................................................................................... 33
Installation example .......................................................................................................................................................................... 33
Balancing .................................................................................................................................................................................................... 34
Important information ...................................................................................................................................................................... 34
Balancing connectors ........................................................................................................................................................................ 34
Pressure fall diagram ........................................................................................................................................................................ 34
Troubleshooting
Emergency operation .............................................................................................................................................................................. 35
Emergency operation domestic hot water ................................................................................................................................... 35
Domestic hot water .................................................................................................................................................................................. 36
Errors and solutions domestic hot water ...................................................................................................................................... 36

4
General information
Safety
Power supply
Heat pump domestic hot water
The heat pump must undergo suitable service inspections under applicable legislation and regulations to keep it in good condition and
in compliance with safety and environmental requirements.
Responsibility for maintenance of the heat pump rests with the owner/user.
Water quality requirements
Requirements for water quality
The hot water tank in the Nilan units is made of steel, which has been given a double enamelling, to ensure an extra long service life. In
addition, the tank is equipped with a sacrificial anode as extra protection. It is important that the sacrificial anode is replaced regularly.
Most units are equipped with an electronic monitoring sacrificial anode, which gives an alarm on the user panel when it is time to
replace it.
In order for the sacrificial anode to function and protect the tank, it is required that the water quality complies with the following:
• Electrical conductivity (EC): Between 30 mS/m and 150 mS/m (millisiemens pr. m) @ 25 °C
• Chloride must be below 250 mg/L @ 65 °C
If the above criteria are not met, the sacrificial anode will not work as intended, after which the tank will be corroded., to
CAUTION
Always disconnect the power supply to the unit if an error occurs that cannot be rectified via the control panel.
CAUTION
If an error occurs on electrically conductive parts of the unit, alway contact an authorised electrician to rectify the error.
CAUTION
Always disconnect the power to supply to the unit before opening the unit doors, for instance for installation, inspection,
cleaning and filter change.
CAUTION
Avoid direct contact with the heating system pipes in the heat pump as they can get very hot.
CAUTION
To protect the heat pump against damage, it is fitted with the following safety equipment.

5
Introduction
Documentation
The following documents will be supplied with the unit:
• Quick guide
• Wiring diagram
In the Quick guide you will find important information regarding installation and start-up of the unit. If you require further information
regarding, for instance, installation of accessories or additional settings in the software, or if you need an extended user manual, the
following documents can be downloaded from the Nilan website:
• Installation instructions
• Software instructions
• User Manual
• Wiring diagram
The instructions can be downloaded from https://www.nilan.dk/en-gb/frontpage/download.
If you have questions regarding installation and operation of the unit after having read the instructions, please contact your nearest
Nilan dealer. A list of Nilan dealers is available on www.nilan.dk/forhandlere.
From factory, the unit has been tested and is ready for operation.
ATTENTION
The unit must be started up immediately after installation and connection to the duct system.
When the ventilation unit is not in operation, humidity from the rooms will enter the duct system and create condensate
water that can run out of the valves and cause damage to floors and furniture. Condensation may also form in the ven-
tilation unit, which can damage its electronics and fans.

6
Unit type
Product description
Compact P EK is a ventilation unit with heat recovery, that has a built-in heat pump, which is used for the production of domestic hot
water, but which is able to heat and cool the home via the ventilation air. Furthermore, it is ezuipped with an electric boiler that heats
the water to floor heating or radiators.
Compact P EK is designed for air flows of up to 275 m3/h at 100 Pa external counter-pressure. Compact P EK XL can handle air flows
up to 430 m3/h at 100 Pa external counter-pressure.
The unit is primarily used in residential construction such as single-family houses and apartments. It ventilates the home by drawing
out the moist and bad air via valves in e.g. bathrooms, toilet, kitchen and utility room, and introduces fresh outdoor air in via valves in
living rooms such as. living room, bedrooms and family room.
The cold outdoor air is heated via the high-efficiency counterflow heat exchanger by the hot exhaust air. The heat loss that occurs via
heat recovery, the built-in heat pump use to produce domestic hot water. All the energy in the exhaust air is utilized, and you have not
really seen any heat loss that you experience with an ordinary ventilation unit.
In the winter, the built-in heat pump can heat the supply air up to 34 ° C, and thus contribute to heating the home. When
the supply air is heated, at the same time a little heat is deposited in the hot water tank and ensures a constant high hot water
temperature.
The heat pump has a reversible cooling circuit, which means that the cooling circuit can be turned and it can cool the supply air in the
summer. Compact P can cool the supply air by up to 10 ° C in relation to the outdoor air. Due to the low air exchange, usually 1/2 time
per hour, it will not act as an air conditioning system. However, when cooling, moisture in the supply air is removed, which results in a
lower humidity in the home. The lower humidity means that it is easier to withstand a slightly higher temperature, which therefore
provides good comfort in the home.
When Compact P cools the supply air, the energy is deposited in the hot water tank, and it can thus be said that “free” domestic hot
water is produced during those periods.
The ventilation heat pump and the electric boiler have common control that ensures that they do not work against each other. For
example if the ventilation heat pump is in cooling mode, the electric boiler is stopped to heat the home at the same time.

7
The unit
1. Duct connections
2. Filter change cover
3. Control panel (HMI touch-panel)
4. Extract air filter
5. Outdoor air filter (pollen filter is placed here if required)
6. Counterflow heat exchanger
7. Heat pump
8. Automatic CTS602
9. Fans
10. 100% bypass damper
11. Pre-heating element (Polar version only)
12. USB-cable (for connecting to PC)
13. Condensation drain with water lock
14. 180 l hot water tank
15. 1,5 kW electrical supplement heater
16. Electronically monitored sacrificial anode
17. Supplementary coil (only SOL version)
18. Plumbing connections
19. Emergency mode (domestic hot water)
20. Electric boiler with 8 l expansion vessel

8
Temperature sensor overview
Dimensional drawing
Temperature sensors outside the unit
T1: Outdoor air
T2: Supply air
T4: Extract air after heat exchanger
T5: Condenser
T6: Evaporator
T10: Extract air
Temperature sensors outside the unit
T7: Supply air after heating element
(accessory)
Temperature sensors int the hot water tank
T11: Top of tank
T12: Bottom of tank
T14: Supply flow floor heating
Connections:
1. Outdoor air
2. Supply air
3. Extract air
4. Discharge air
Weight: 260 kg.
All listed measurements are in mm.
900
2065 120
1
2
3
4
160
97
328
610
179
399
141
337
160 160
119

9
Accessories
Electrical pre-heating element for frost protection of the unit
Electrical after-heating element for duct installation
EM-box
DTBU damper
CO2-sensor
If your ventilation unit is not a Polar version with an integral pre-heating element, we recommend that you
purchase an external pre-heating element as frost protection of the ventilation unit.
During prolonged periods of frost, the high efficiency counterflow heat exchanger will ice up. To prevent ice
formation, we recommend that you install an electrical pre-heating element.
The pre-heating element consumes limited energy and it ensures efficient heat recovery without periods of
defrosting the counterflow heat exchanger. You thereby achieve an overall reduction in energy
consumption.
Installing an after-heating element allows you to control the supply air temperature in the following cases:
• You want to use the ventilation air to heat the dwelling
• You want to control the supply air temperature to avoid potential cold draughts and coldness from the
ventilation
The electrical after-heating element is for installation in the supply air duct. It would be an advantage to place
it within the climate screen. It comes with the necessary sensors and connectors.
If you want to run the cooker hood via the ventilation unit, in some cases there may be insufficient air for
cooker hood extraction.
If you install an EM-box, you can regulate the extracted air when the cooker hood is in operation, so that less
air is drawn from, for instance, the bathroom and the utility room. This will allow enough air for the cooker
hood to extract sufficiently.
The EM-box is fitted with a metal filter that cleans the air in the cooker hood of grease particles efficiently. It
thereby protects the ventilation unit.
If there is insufficient space for mounting an EM-box in the installation, you can achieve the same effect by
controlling the extract air with a DTBU damper.
You then have to adjust the duct system yourself with a connection to the cooker hood.
If you want to adjust the fan speed level according to use of the dwelling/building (amount of people), you
can retrofit a CO2-sensor.
You select the CO2-level you want via the control panel. If this level is exceeded, ventilation will increase.

10
Safety group
Safety group with scalding protection
Extension cable HMI user panel for 8-pin connector
Cover plate HMI user panel
Vibration absorbers
By law, a safety group must be fitted for the cold water connection to the hot water tank.
Nilan offers a safety valve in brass with the following functions:
• Safety valve
• Check valve
• Stop valve
• Drain tab
The control has a software scald protection that ensures that the water in the hot water tank does not
gets too hot.
If you have a large cooling and / or heating need, it may be necessary to deactivate the software scald
protection. The water in the hot water tank can be up to 90 ° C, which is why you need to install a safety group
with scald protection.
If a solar panel is used to heat the domestic hot water via the supplementary coil in the hot water tank, a
safety group with scald protection must be fitted.
The control panel for the ventilation unit is connected to a short cable so that the panel can be mounted in the
immediate vicinity of the unit. The panel can also be mounted on the front of the unit.
Is the unit located in a place where you can not immediately see the control panel, e.g. in a closet or on a
unused ceiling, you can order a 10 or 20 m extension cable with connectors, so that the control panel can be
placed in a place where the user has the opportunity to see it.
It is important that the control panel is located so that the user can see any alarms such as when changing
filters i needed.
It is possible to move the HMI control panel away from the unit and place it in a more visible place.
A cover plate can be ordered to cover the hole where the control panel was located.
It is important to ensure that the ventilation unit does not transfer vibrations to the building. The ventilation
unit should therefore be placed on a vibration absorbing material.
Nilan can supply effective vibration absorbers to place under the ventilation unit. They are sold in packs of 4.

11
Flexible sound damper
Pollen filter
Trolley
To make it esay to service the unit in the future, we recommend that you fit a flexible connection between the
unit and the duct system.
Nilan flexible sound damper absorbs sounds effectively from both the duct system and from roof stacks.
The ventilation unit comes, as standard, with a plate filter to protect the unit.
If the dwelling is used by anybody with, for instance, pollen allergies, you may benefit from purchasing a
pollen filter. This should be placed in the outdoor air intake, which will reduce the pollen count in the dwelling.
A Nilan trolley makes it easy to transport the heavy units into the home, without having to carry out heavy
lifting yourself with the risk of injury.
A set consists of two lifting carts that are fastened on each side of the unit while it is standing on the pallet.
Using the two handles, lift the unit off the pallet and drive it to where it is to be used.

12
Installation
Assembly
Transport into the dwelling
Compact P is supplied in one piece on a pallet, packed in cardboard.
You can use Nilan lifting trolley, with which the unit can be lifted directly off the pallet and into the building. If the filter box is removed,
the unit can be manoeuvred through an ordinary door.
Positioning of unit
The unit should be positioned on a level and vibration-free substrate, with good access for servicing and filter change.
The unit is fitted at the factory with 4 lifting straps, one for each top corner.
This makes it possible to lift in the unit with a crane, which is a great advantage if the terrain does
not allow you to drive with a lift truck.
When lifting the units with the supplied straps, these must be at an angle of max. 45°from the
vertical.
ATTENTION
When setting up the unit, consideration must always be given to future servicing and maintenance, therefore a free
space in front of the unit of at least 60 cm is recommended.
ATTENTION
To achieve a proper run-off from the condensate tray, it is important that the unit is installed in level.
ATTENTION
If a screen is mounted over the Compact P, it must be easy to dismantle this.
At the lower rear and sides of the unit, there are punched areas
which can be clipped out, so you do not cuts the holes yourself.
The rear angle iron on the base frame can be removed, allowing the
unit to be pushed closer to the wall, thereby concealing the water
connections.

13
Electrical installation
Safety
It is important to check that wires are not damaged or squeezed during connection and use.
Connections overview
Connection of 400V and connection to the control via USB cable can be found behind the unit's large front door. An 8-pole plug is found
on top of the unit.
1. 8-pole plug with options for connecting user program 1, Modbus and control panel
2. Connection of PC via a USB cable
3. Connection of 400V power supply
ATTENTION
All work must be carried out by qualified persons and in compliance with existing legislation and regulations.
ATTENTION
It is important that the power is off, if you do work to the electrical components of the unit.

14
HMI User panel
Moving the user panel
The user panel is from the factory mounted in the front of the unit. It is important that the user panel is located in a visible place so that
the user can follow the operation and become aware of any. alarms. Therefore, it may be necessary to move the user panel to another
location.
A cover plate can be purchased for mounting in the hole in the front of the unit where the user panel is located from the factory.
Wires from the 8-pin socket, for connection of the HMI control panel, are loose in the unit and must be connected to the circuit
(according to the electrical diagram), where the wires from the front connection are removed.
Nilan offers a connection cable with RJ12 connectors of 10 m and 20 m, respectively. It is also possible to customize a cable up to 50 m
in length. A standard LAN cable is used for this.
Wall bracket
Mount the HMI panel on the wall using the integrated wall bracket..
The panel should be placed in a visible spot so it is possible to change settings and to monitor warnings or alarms regarding operation
of the unit.
Mounting the RJ12 plug
1. Empty
2. Empty
3. Green (A2)
4. Green/white (B2)
5. Brown (12V)
6. Brown/white (GND)
Use a RJ12 crimping tool
Mounting in the 8-pin plug
1. Brown/white (GND)
2. Green/white (B2)
3. Green (A2)
4. Empty (User programe 1)
5. Empty (User programe 1)
6. Empty (Modbus A1)
7. Empty (Modbus B1)
8. Brown (12V)
The wall bracket is located at the back of
the panel. You can detach it by loosening
the bracket at the bottom of the panel.
You can remove it.
Mount the wall bracket on the wall using
2 screws.
Click the RJ12 plug into place at the
bottom of the HMI panel. The wire can
run down along the wall, into the wall or
through the groove at the back of the
panel.
1
2
3
4
5
6
7
8

15
Electrical connections unit
Compact P unit
Ventilation and domestic hot water
3N 400V - 50 Hz max 20 A
Remember safety switch.

16
Electrical connections accessories
User programe 1
User programe 1 is connected via the 8-pin plug mounted on top of the unit.
The user programe functions are used to override normal operation. The input signal must come from a potential-free switch. When
closed, the function is activated with the settings selected in the control panel under Service / User selection 1.
Some examples of the situations in which the user programe functions are used:
Connection via the 8-pin olug:
Modbus
The CTS602 controller has an open Modbus RS485 communication, that allows you to communicate with it and control the ventilation
unit via external control systems.
We refer to the software manual and the Modbus protocol for further information about settings and registers.
Connection via the 8-pin plug:
Cooker hood If you choose to run the cooker hood over the ventilation unit, the cooker hood sends a potential-free signal
to the ventilation unit when it is switched on. When this happens, the ventilation unit increases the air volume
to the set level, so that enough air is extracted through the hood.
Fireplace/wood
burning stove
Normally, the ventilation is balanced with a small negative pressure in the home, so that no moisture is
forced into the building's construction. It is a disadvantage if you light up your fireplace / wood stove, as the
smoke will then enter the home instead of out of the chimney.
When you switch on the fireplace/burning stove, you can activate the user function with a potential-free
switch, which ensures that there is an overpressure in the home, so that the smoke smokes out of the chim-
ney as it should.
Extended
operation
If the ventilation unit is used in an office or school where the ventilation is reduced outside the opening hours,
it may be necessary to turn it up briefly if, for example when a meeting is held in the evening.
There you can then have a switch that is activated and the ventilation is increased e.g. for an hour before it
then goes back into operation.
User programe 1 is connected to pin 4 and 5 in the 8-pol plug.
Modbus is connected in following pins:
1. GND
6. A1 (Modbus +)
7. B1 (Modbus -)
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8

17
External pre-heating element
It is possible to purchase an external electric pre-heating element for frost protection of the ventilation unit.
The electric preheating element is mounted in the outdoor air duct before the unit with the necessary temperature sensor.
If it is desired to see the actual outdoor air temperature on the control panel, the temperature sensor T1 / T8 must be led out into the
duct before the preheating surface.
.
It is important that the sensor is placed at least 32 cm from the preheating element to achieve correct regulation.
The pre-heating element has a three-step safety system that prevents overheating.
9. An operating thermostat regulates the heating and ensures that the supply air temperature does
not fall below -1 °C
10. Should the temperature exceed 50 °C, a max. thermostat switches off the pre-heating element.
(If installed vertically with downward airflow, the pre-heating element switches off at 70 °C)
11. A safety thermostat switches off the pre-heating element if the temperature exceeds 100 °C.
Then, you must reset it manually.
Minimum airflow at Ø160: 110m3/h.
ATTENSION
The heating element must be insulated with a fire retardant insulation material. The cover of the connection box,
however, must not be insulated.
Dimensional drawing: Positioning options:
7NL 8
TT1/T8
1x230V ~ 50 Hz max. 16A
Min. 32 cm
276
370
~50 ~50
71
Ø160

18
Electrical after-heating element
An after-heating element is necessary if you want to control the supply air temperature.
The electric after-heating element can be purchased for installation in the supply air duct and the necessary sensor amd PCB board
are included.
Run the wires along the duct and through the grommet on the unit down to the circuit board. Connect the wires in accordance with the
wiring diagram.
ATTENTION
The T7 temperature sensor has been installed near the heating element. The T2 sensor MUST be disconnected from
the circuit board. The T7 sensor should then be connected to where the T2 sensor was previously connected up.
A
Connection to the CTS602 board:
0-10V (Brown) - GND (Blue) T7: Temperature sensor (Black)
ATTENTION
The heating element must be insulated with a fire retardant insulation material. The cover of the connection box, how-
ever, must not be insulated.
Dimensional drawing: Ø125/Ø160/Ø200 Positioning options:
ATTENTION
The after-heating element must be activated in the Software under Service.
A
Min. 50 cm Min. 2 x Ø
T7
T7
CTS602
1x230V ~ 50 Hz max. 16A
9
NL10
T2
0-10V
GND
T7
276
370
~50 ~50
71
Ø

19
CO2 sensor
If there is a large load change in the home / building, it is advantageous to install a CO2 sensor to control the air exchange.
The CO2 sensor measures the CO2 level in the exhaust air, and regulates the ventilation level accordingly.
The CO2 sensor is mounted in the unit as illustrated below:
1. Remove the T4 sensor in the heat exchanger. 2. Remove the heat exchange by pulling the strap
(do nut cut).
3. Pierce a hole into the foam over the crossbar, (where the
heat exchanger is positioned) to gain access to the recess in
the top cover.
4. Run the wire from the CO2 sensor through this recess.
5. Mount the CO2 sensor in the top cover, using self-thread-
ing screws (included in the CO2 sensor kit).
6. Run the wire from the CO2 sensor through the cable
grommet to the automation.
Wire is subsequently tied up with cable strips.

20
For SW version 2.00x or less, the resistor must be mounted in series with a black signal cable
For SW version 2.01x and above, do not mount a resistor.
7. Mount the power supply box in the box for automatic.
(pre-drill 2 holes for the screws).
8. Connects as shown in the electrical diagram below.
9. Reinstall the counterflow heat exchanger. Remember to
reinstall the T4 sensor.