nilan Compact P2 AIR9 User manual

INSTALLATION INSTRUCTIONS
Compact P2 / Compact P2 Polar - AIR9
Gateway
CTS602 HMI BY NILAN
Version 1.10 - 01.11.2023
M24 Compact P2 AIR9 GB

2
Table of contents
General information
Important information .........................................................................................................................................................................4
Safety ............................................................................................................................................................................................................4
Power supply .........................................................................................................................................................................................4
Heat pump domestic hot water ..........................................................................................................................................................4
Heat pump for central heating ...........................................................................................................................................................5
Starting the external unit ....................................................................................................................................................................5
Water quality requirements ......................................................................................................................................................................5
Requirements to quality of water ......................................................................................................................................................5
Introduction ..................................................................................................................................................................................................6
Documentation ......................................................................................................................................................................................6
Unit type ........................................................................................................................................................................................................7
Product description ..............................................................................................................................................................................7
Unit - the indoor unit ............................................................................................................................................................................8
Unit - the outdoor unit ..........................................................................................................................................................................9
Temperature sensor overview ........................................................................................................................................................ 10
Dimensional drawing ......................................................................................................................................................................... 11
Piping diagram .................................................................................................................................................................................... 12
Accessories ................................................................................................................................................................................................ 13
Electrical pre-heating element for frost protection of the unit ................................................................................................ 13
CO2 sensor .......................................................................................................................................................................................... 13
Expansion PCB .................................................................................................................................................................................... 13
EM-box ................................................................................................................................................................................................. 13
DTBU damper ..................................................................................................................................................................................... 13
Extension cable HMI control panel .................................................................................................................................................. 14
Cover plate HMI user panel .............................................................................................................................................................. 14
Safety group ....................................................................................................................................................................................... 14
Safety group with scalding protection ........................................................................................................................................... 14
Flexible sound damper ...................................................................................................................................................................... 14
Pollen filter .......................................................................................................................................................................................... 15
Trolley .................................................................................................................................................................................................. 15
SHW hot water tank ........................................................................................................................................................................... 15
Set-up
Mounting .................................................................................................................................................................................................... 16
Transport into the building .............................................................................................................................................................. 16
Positioning the unit ............................................................................................................................................................................ 16
Mounting outdoor unit ............................................................................................................................................................................. 17
Transport into the building outdoor unit ....................................................................................................................................... 17
Sound data AIR9 ................................................................................................................................................................................. 17
Positioning an outdoor unit .............................................................................................................................................................. 18
Fixing an outdoor unit to its supporting surface .......................................................................................................................... 18
Foundation .......................................................................................................................................................................................... 19
Condensate drain ............................................................................................................................................................................... 19
Detaching the front doors from the AIR outdoor unit ................................................................................................................. 20
Electrical installation
Safety ................................................................................................................................................................................................... 21
Connections overview ...................................................................................................................................................................... 21
Electrical connection unit ........................................................................................................................................................................ 22
Power supply ...................................................................................................................................................................................... 22
Compact P2 AIR .................................................................................................................................................................................. 22
Change from 400V to 230V ............................................................................................................................................................. 23
Circulation pump ................................................................................................................................................................................ 24
Connecting a gateway ............................................................................................................................................................................. 24
Connecting to the internet ............................................................................................................................................................... 24
Location on the unit ........................................................................................................................................................................... 24
HMI Control panel ..................................................................................................................................................................................... 25
Moving the control panel .................................................................................................................................................................. 25
Wall bracket ........................................................................................................................................................................................ 25
Electrical connection accessories .......................................................................................................................................................... 26
SHW hot water tank ........................................................................................................................................................................... 26
User selection 1 .................................................................................................................................................................................. 26
Smart Grid ........................................................................................................................................................................................... 27
External electrical pre-heating element ........................................................................................................................................ 28
Mounting an expansion PCB on the CTS602 circuit board ......................................................................................................... 29
User selection 2 .................................................................................................................................................................................. 31
EM-box (damper option) ................................................................................................................................................................... 31
DTBU (damper option) ....................................................................................................................................................................... 32

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Fire thermostat / external fire automation system ....................................................................................................................32
Joint alarm ............................................................................................................................................................................................33
External heat supply ..........................................................................................................................................................................33
External underfloor heating control ...............................................................................................................................................34
Active cooling function ......................................................................................................................................................................34
Plumbing installation
Condensate drain ......................................................................................................................................................................................35
Important information .......................................................................................................................................................................35
Hot water tank ...........................................................................................................................................................................................36
Connection overview .........................................................................................................................................................................36
Plumbing connection ................................................................................................................................................................................36
Requirements to quality of water ...................................................................................................................................................37
Hot water circulation .........................................................................................................................................................................37
Supplementary coil ............................................................................................................................................................................37
Softened water ...................................................................................................................................................................................37
Central heating ..........................................................................................................................................................................................38
Water connection overview, indoor unit ........................................................................................................................................38
Connections overview outdoor unit ................................................................................................................................................39
Mounting hoses to the outdoor unit ................................................................................................................................................40
Insulation of hoses from the outdoor unit .....................................................................................................................................41
Check list for the central heating system prior to start-up ........................................................................................................41
Plumbing connections accessories ........................................................................................................................................................42
Safety group ........................................................................................................................................................................................42
Safety group with anti-scald protection ........................................................................................................................................42
Hot water tank ....................................................................................................................................................................................43
Connecting to SHW hot water ..........................................................................................................................................................44
Connection to supplementary coil in SHW hot water tank .........................................................................................................45
Connecting to DHW hot water ..........................................................................................................................................................45
Ventilation installation
Duct system ...............................................................................................................................................................................................46
Legislation ............................................................................................................................................................................................46
Ducts .....................................................................................................................................................................................................46
Ventilation unit ...................................................................................................................................................................................46
Extract air ............................................................................................................................................................................................47
Supply air .............................................................................................................................................................................................47
Roof terminals .....................................................................................................................................................................................47
Installation example ...........................................................................................................................................................................47
Balancing ....................................................................................................................................................................................................48
Important information .......................................................................................................................................................................48
Start-up
Central heating ..........................................................................................................................................................................................49
Filling with water .................................................................................................................................................................................49
Topping up water ................................................................................................................................................................................49
Check the particle filter .....................................................................................................................................................................49
Troubleshooting
Emergency mode .......................................................................................................................................................................................50
Emergency mode domestic hot water ............................................................................................................................................50
Emergency mode central heating ...................................................................................................................................................51
Domestic hot water ..................................................................................................................................................................................52
Errors and solutions domestic hot water .......................................................................................................................................52
Central heating ..........................................................................................................................................................................................52
Problems and solutions central heating .........................................................................................................................................52

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General information
Important 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.
CAUTION
Do not turn on the power supply for the unit until there is water in the hot water tank and the outdoor unit has been con-
nected up to the unit.
If, during the construction phase, you want to have access to ventilation and domestic hot water, but you do not want to
connect up the outdoor unit, you must uninstall the circulation pump between the indoor and the outdoor units.
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 equipped with electronic temperature monitoring.

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Heat pump for central heating
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.
Starting the external unit
The AIR outdoor unit is equipped with a compressor heating element, which heats up the compressor prior to starting and in case of
low outdoor temperatures. This facilitates start-up and extends the compressor’s service life.
Water quality requirements
Requirements to quality of water
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 re-
place 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.
CAUTION
Avoid direct contact with the heating system pipes in the heat pump as they can get very hot.
ATTENTION
To secure the heat pump against damages, it is fitted with the following safety equipment:
• Electronic monitoring of the temperature
• 2,5 bar safety valve for central heating and buffertank
• Frost protection function that ensures that the compressor starts up at low temperatures (requires an undisrupted
power supply to the unit)
• Low and high pressure switch for compressor
CAUTION
The compressor heating element must be left on for a minimum of 3 hours before starting the compressor for the first
time.

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Introduction
Documentation
The following documents will be supplied with the unit:
• Installation instructions
• Software instructions
• User Manual
• Wiring diagram
The instructions can be downloaded from www.nilan.dk.
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.
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.

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Unit type
Product description
Compact P2 AIR is a ventilation unit with heat recovery, that has a built-in heat pump, which is used for the production of domestic hot
water, and which is also able to heat and cool the home by central heating via ventilation, and an energy-efficient and low-noise AIR
air/water heat pump heats the home via floor heating or low-temperature radiators.
Compact P2 is designed for air flows of up to 425 m3/h at 75 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 case of high hot water consumption, there is a 1.5 kW
electric supplement heater in the hot water tank, which can also be used to heat the water.
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 P2 can cool the supply air by up to 20 ° 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 pro-
vides good comfort in the home.
When Compact P2 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 energy-efficient and low-noise AIR air/water heat pump heats the home via floor heating or low-temperature radiators. It re-
trieves the energy from outside air and functions at temperatures as low as -17 ºC. The heat pump has an electrical power supply to
help it to function during very cold periods. AIR can cool the home in the summer with active cooling, either through the underfloor
heating system or fan coils.
The AIR air/water heat pump can also be used to help produce hot water for domestic use, either by pre-heating the water in a SHW-
tank, or directly in a Compact P2 DHW tank, if bought with a solar coil.

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Unit - the indoor unit
Compact P2:
1. Duct connections
2. Filter replacement door
3. Control panel (HMI touch panel)
4. Extract air filter
5. Outdoor air filter (if purchased as an accessory, a pollen fil-
ter should be fitted here)
6. Counterflow heat exchanger
7. Heat pump
8. Automation CTS602
9. Fans
10. Pre-heating element for frost protection (Polar version only)
11. 100% bypass damper
12. Electrical connections accessories
13. Gateway for App option
14. 180 litres hot water tank (DHW)
15. 1.5 kW immersion heater (with overheat protection)
16. Electronically monitored sacrificial anode
17. Supplementary coil (SOL version only)
18. Plumbing connections
19. Electrical connections panel
20. Emergency mode (DHW)
21. Condensate drain with water trap
AIR:
22. Safety valve and manometer for the central heating circuit
23. Buffer tank 50 litres
24. Filling tap and particle filter for the central heating circuit
25. Integrated circulation pump for circulation with the outdoor
unit
26. Supplemental electric heating for central heating 2 kW & 3
kW
27. Expansion vessel for central heating circuit 10 litres

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Unit - the outdoor unit
Front: Closed and open
Rear side: Closed and open
AIR outdoor unit:
28. Fan
29. Evaporator
30. Heat pump
31. Condensate drain with integral heating cable
32. Connections to/from the indoor unit (liquid)
33. Electrical connection cable for AIR heat pump outdoor unit (screw ter-
minal)
34. Communication cable with connector for connection to the indoor unit
(RJ45)
Side: Open

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Temperature sensor overview
Temperature sensor in the AIR outdoor unit
T16: Before the condenser (to outdoor unit)
T17: After the condenser (from outdoor
unit)
T20: Outdoor temperature
T23: Evaporator temperature
T35: Pressure pipe temperature
Temperature sensor in the AIR indoor unit
T18: Buffer tank (supply flow)
Temperature sensor in Compact P2
T1: Outdoor air
T2: Supply air
T4: Extract air after the exchanger
T5: Condenser
T6: Evaporator
T10: Extract air
RH: Humidity sensor
Temperature sensor in the hot water tank
T11: Top of the tank
T12: Bottom of the tank
Temperature sensor outside the unit
T7: Supply air after the after-heating
element (accessory)
T8: Outdoor air before pre-heating el-
ement (accessory)
T9: On the after-heating element (ac-
cessory)