nilan Compact P GEO User manual

INSTALLATION INSTRUCTIONS
Compact P / Compact P Polar - GEO
CTS700 TOUCH BY NILAN
Version 4.00 - 28.10.2020
M32_Compact-P-GEO_GB

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Table of contents
General information
Safety ............................................................................................................................................................................................................4
Power supply .........................................................................................................................................................................................4
Heat pump domestic hot water ..........................................................................................................................................................4
Heat pump for central heating ...........................................................................................................................................................4
Water quality requirements ......................................................................................................................................................................5
Requirements for water quality ........................................................................................................................................................5
Introduction ..................................................................................................................................................................................................5
Documentation ......................................................................................................................................................................................5
Unit type ........................................................................................................................................................................................................6
Product description ..............................................................................................................................................................................6
The unit ...................................................................................................................................................................................................7
Temperature sensor overview ...........................................................................................................................................................8
Dimensional drawing ............................................................................................................................................................................9
Pipe diagram ....................................................................................................................................................................................... 10
Accessories ................................................................................................................................................................................................ 11
Electrical pre-heating element for frost protection of the unit ................................................................................................ 11
CO2-sensor ......................................................................................................................................................................................... 11
EM-box ................................................................................................................................................................................................. 11
Safety group ....................................................................................................................................................................................... 11
Safety group with scalding protection ........................................................................................................................................... 11
Vibration absorbers .......................................................................................................................................................................... 12
Flexible sound damper ...................................................................................................................................................................... 12
Pollen filter .......................................................................................................................................................................................... 12
Trolley .................................................................................................................................................................................................. 12
SHW hot water tank ........................................................................................................................................................................... 12
Installation
Assembly .................................................................................................................................................................................................... 13
Transport into the dwelling .............................................................................................................................................................. 13
Positioning of unit .............................................................................................................................................................................. 13
Ground collector circuit ........................................................................................................................................................................... 14
Examples of the laying ...................................................................................................................................................................... 14
Electrical installation
Safety ................................................................................................................................................................................................... 15
Connections overview ...................................................................................................................................................................... 15
User panel .................................................................................................................................................................................................. 16
Touch Panel ......................................................................................................................................................................................... 16
Dimensional drawing user panel ..................................................................................................................................................... 16
Placement of the Touch panel ......................................................................................................................................................... 17
Mounting the wall bracket ............................................................................................................................................................... 18
Electrical connections unit ...................................................................................................................................................................... 19
Power supply ...................................................................................................................................................................................... 19
GEO3, GEO6 and GEO9 ....................................................................................................................................................................... 19
Change from 400V to 230V ............................................................................................................................................................. 20
Circulation pump ................................................................................................................................................................................ 21
Electrical connections accessories ........................................................................................................................................................ 22
SHW hot water tank ........................................................................................................................................................................... 22
User selection 1 .................................................................................................................................................................................. 23
User selection 2 .................................................................................................................................................................................. 23
External pre-heating element ......................................................................................................................................................... 24
CO2 sensor .......................................................................................................................................................................................... 25
Smart Grid ........................................................................................................................................................................................... 27
External underfloor heating control ............................................................................................................................................... 27
Joint alarm ........................................................................................................................................................................................... 28
Cooker hood and EM box .................................................................................................................................................................. 28
Fire protection .................................................................................................................................................................................... 29
External room sensor ........................................................................................................................................................................ 29
External heat supply .......................................................................................................................................................................... 30
Connecting EHD damper ................................................................................................................................................................... 31
BAH Geothermal heater ................................................................................................................................................................... 32
Passive cooling function ................................................................................................................................................................... 33
Plumbing installation
Condensate drain ..................................................................................................................................................................................... 35
Important information ...................................................................................................................................................................... 35
Hot water tank .......................................................................................................................................................................................... 36
Connection overview ........................................................................................................................................................................ 36

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Connection ...........................................................................................................................................................................................36
Requirements for water quality ......................................................................................................................................................37
Hot water circulation .........................................................................................................................................................................37
Supplementary coil ............................................................................................................................................................................37
Softened water ...................................................................................................................................................................................37
Central heating ..........................................................................................................................................................................................38
Connection overview .........................................................................................................................................................................38
The brine circuit ..................................................................................................................................................................................39
Check list for the central heating system prior to start-up ........................................................................................................40
Plumbing connections for accessories ..................................................................................................................................................41
Safety group ........................................................................................................................................................................................41
Safety group with anti-scald protection ........................................................................................................................................42
Passive cooling module .....................................................................................................................................................................43
Domestic hot water tank ...................................................................................................................................................................44
Connecting to SHW hot water ..........................................................................................................................................................45
Connection to supplementary coil in SHW hot water tank .........................................................................................................46
Connecting to DHW hot water ..........................................................................................................................................................47
Ventilation installation
Duct system ...............................................................................................................................................................................................48
Legislation ............................................................................................................................................................................................48
Ducts .....................................................................................................................................................................................................48
Ventilation unit ...................................................................................................................................................................................48
Extract air ............................................................................................................................................................................................49
Supply air .............................................................................................................................................................................................49
Roof terminals .....................................................................................................................................................................................49
Installation example ...........................................................................................................................................................................49
Balancing ....................................................................................................................................................................................................50
Important information .......................................................................................................................................................................50
Balancing connectors ........................................................................................................................................................................50
Pressure fall diagram .........................................................................................................................................................................50
Start-up
Central heating ..........................................................................................................................................................................................51
Filling with water .................................................................................................................................................................................51
Topping up water ................................................................................................................................................................................51
Check the particle filter .....................................................................................................................................................................51
Troubleshooting
Emergency operation ...............................................................................................................................................................................52
Emergency operation domestic hot water ....................................................................................................................................52
Emergency operation central heating ............................................................................................................................................53
Domestic hot water ..................................................................................................................................................................................54
Errors and solutions domestic hot water .......................................................................................................................................54
Central heating ..........................................................................................................................................................................................54
Errors and solutions central heating ..............................................................................................................................................54

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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.
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.
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.
CAUTION
To secure the heat pump against damages, it is fitted with the following safety equipment:
• Expansion systems for central heating and buffertank
• Safety valve for central heating and buffertank
• Low and high pressure switch for compressor

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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
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.

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Unit type
Product description
Compact P is a ventilation unit with heat recovery, that has a built-in heat pump, which is used for the production of domestic hot wa-
ter, and which is also able to heat and cool the home by central heating via a ground source heat pump.
Compact P is designed for air flows of up to 275 m3/h at 100 Pa external counter-pressure. Compact P 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 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 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 pro-
vides 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 wa-
ter is produced during those periods.
The energy-efficient and low-noise GEOthermal heat pump heats the home via floor heating or lowtemperature radiators. It retrieves
the energy from the earth. The heat pump has an electrical power supply to help it to function during very cold periods. GEO can cool
the home in the summer with passive cooling, either through the underfloor heating system or fan coils.
The GEO ground source heat pump can also be used to help produce hot water for domestic use, either by pre-heating the water in a
buffer tank, or directly in a Compact P hot water tank, if bought with a solar coil.

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The unit
Compact P:
1. Duct connections
2. Filter change cover
3. Control panel (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 CTS700
9. Fans
10. 100% bypass damper
11. Pre-heating element (Polar version only)
12. LAN-cable (for connecting to router or PC)
13. Condensation drain with water lock
14. 180 l domestic hot water tank (DHW)
15. 1,5 kW electrical supplement heater (with overheating cut-
out, which has to be pressed in again if activated)
16. Electronically monitored sacrificial anode
17. Supplementary coil (only SOL version)
18. Plumbing connections
19. Electrical connection panel
20. Emergency mode (domestic hot water)
GEO:
21. 2 x 8 l expansion tank for central heating and brine circuit
22. Safety valve and manometer for the central heating circuit
23. Inverter controlled DC compressor
24. Feed tab and particle filter for the central heating circuit
25. Integrated circulation pump for the brine circuit
26. 2 kW electrical supplement heating

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Temperature sensor overview
Temperature sensors in the unit
T1: Outdoor air
T2: Supply air
T3: Extract air
T4: Extract air after heat exchanger
T5: Condenser
T6: Evaporator
Temperature sensors outside the unit
T7: Supply air after heating element
(accessory)
T8: Outdoor air before preheating element
(accessory)
T9: On heating element
(accessory)
TExt: External temperature sensor
(accessory)
Temperature sensors in the hot water tank
T11: Top of tank
T12: Bottom of tank
Temperature sensor Brine
T13: Brine supply flow
T14: Brine return flow
Temperature sensors GEO
T16: Before condenser
T17: After condenser
T18: Supply flow central heating
T20: Outdoor temperature
T23: Evaporator temperature

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Dimensional drawing
Connections:
1. Outdoor air
2. Supply air
3. Extract air
4. Discharge air
Weight: 257 kg.
All listed measurements are in mm.

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Pipe diagram
* Everything within the red box is Nilan delivery.
1. Evaporator
2. Service valve for low pressure
3. Low-pressure pressostat
4. Compressor
5. High-pressure pressostat
6. Condensor
7. Expansion valve
8. Sight glass with humidity indicator
9. Service valve for high pressure
10. Combi filter
11. Connection 1"
12. Flexihose 1"
13. Filling tap
14. Shut-off valve
15. Dirt filter
16. Safety valve 3,5 bar
17. Manometer (for central heating, not mounted)
18. Ball valve
19. Circulation pump 130 mm
20. Pressure control 0,5/1,1 bar
21. Flexihose 10 mm
22. Expansion tank 8 L
23. Automatic control vent 3/8"
24. Electric cartridge 2 kW
25. Temperature sensor T18
26. Safety valve 2,5 bar (not mounted)
27. Connection 3/4"
28. Overcurrent valve
36. Circulation pump
40. Temperature sensor T13
41. Temperature sensor T14
42. Temperature sensor T16
43. Temperature sensor T17
46. Outdoor temperature sensor T20
ATTENTION
An overflow valve must be installed point 28 in the floor heating circuit, with a circulation pump with fixed speed. Alter-
natively, remove the individual thermostats, to ensure sufficient flow.
Central heating
Supply flow
Cooling module
Return flow
GEO heat pump
Ground collectors