nilan M24 DHW AIR9 Installation guide

Brand: nilan

Model: M24 DHW AIR9

Category: Split-system air conditioners

Type: Installation guide

INSTALLATION INSTRUCTIONS

DHW AIR9

Gateway

CTS602 HMI BY NILAN

Version 1.00 - 01.05.2023

M24 DHW AIR9 GB

34°C

0°C

57°C 34°C

55°C

0°C

34°C

55°C

General information

Important information ......................................................................................................................................................................... 4

Safety ............................................................................................................................................................................................................ 4

Power supply ......................................................................................................................................................................................... 4

Heat pump ............................................................................................................................................................................................. 4

Water quality requirements ...................................................................................................................................................................... 5

Requirements to quality of water ..................................................................................................................................................... 5

Introduction .................................................................................................................................................................................................. 6

Documentation ..................................................................................................................................................................................... 6

Unit type ....................................................................................................................................................................................................... 6

Product description .............................................................................................................................................................................. 6

Unit - DHW AIR indoor unit .................................................................................................................................................................. 7

Unit - the outdoor unit ......................................................................................................................................................................... 8

Temperature sensor overview .......................................................................................................................................................... 9

Dimensional drawing ..........................................................................................................................................................................10

Piping diagram .....................................................................................................................................................................................11

Accessories ................................................................................................................................................................................................12

Extension cable HMI user panel for 8-pin plug ..............................................................................................................................12

Cover plate HMI user panel ...............................................................................................................................................................12

Safety group ........................................................................................................................................................................................12

Trolley ...................................................................................................................................................................................................12

Set of doors outdoor unit ..................................................................................................................................................................12

Set-up

Mounting .....................................................................................................................................................................................................13

Transport of indoor unit into the building ......................................................................................................................................13

Positioning the indoor unit ................................................................................................................................................................13

Transport into the building outdoor unit ........................................................................................................................................14

Positioning an outdoor unit ..............................................................................................................................................................15

Fixing an outdoor unit to its supporting surface ...........................................................................................................................15

Foundation ...........................................................................................................................................................................................16

Condensate drain ...............................................................................................................................................................................16

Detaching the front doors from the DHW AIR outdoor unit .......................................................................................................17

Electrical installation

Connections overview .......................................................................................................................................................................18

Electrical connection unit ..................................................................................................................................................................19

Change from 400V to 230V ..............................................................................................................................................................20

Circulation pump .................................................................................................................................................................................21

Connecting to the internet ................................................................................................................................................................21

Location on the unit ...........................................................................................................................................................................21

HMI Control panel ......................................................................................................................................................................................22

Removable panel ................................................................................................................................................................................22

Moving the control panel ..................................................................................................................................................................22

Wall bracket .........................................................................................................................................................................................23

Electrical connection accessories ..........................................................................................................................................................24

Modbus .................................................................................................................................................................................................24

External underfloor heating control ...............................................................................................................................................24

Plumbing installation

Hot water tank ...........................................................................................................................................................................................25

Connections overview .......................................................................................................................................................................25

Connection ...........................................................................................................................................................................................25

Requirements to quality of water ...................................................................................................................................................26

Hot water circulation .........................................................................................................................................................................26

Softened water ...................................................................................................................................................................................26

Central heating ..........................................................................................................................................................................................27

Connections overview indoor unit ..................................................................................................................................................27

Connections overview outdoor unit ................................................................................................................................................28

Mounting hoses to the outdoor unit ................................................................................................................................................29

Insulation of hoses from the outdoor unit .....................................................................................................................................30

Plumbing connections accessories ........................................................................................................................................................30

Safety group ........................................................................................................................................................................................30

Start-up

Central heating and domestic hot water ..............................................................................................................................................31

Check list for the central heating system prior to start-up ........................................................................................................31

Filling with water .................................................................................................................................................................................31

Topping up water ................................................................................................................................................................................32

Control particle filter. ........................................................................................................................................................................32

Filling the domestic water tank with water ...................................................................................................................................32

Troubleshooting

Emergency mode ...................................................................................................................................................................................... 33

Emergency mode central heatingI .................................................................................................................................................. 34

Emergency mode domestic hot water ........................................................................................................................................... 35

Problems and solutions central heating ........................................................................................................................................ 36

General information

Important information

Safety

Power supply

Heat pump

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 the domestic ho water tank and central circuit heating has been filled

with water.

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

and cleaning.

CAUTION

Avoid direct contact with the heating system pipes in the heat pump as they can get very hot.

CAUTION

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

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.

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.

Unit type

Product description

DHW AIR is a heat pump unit used for the production of hot water for central heating and for domestic hot water.

DHW AIR is an energy efficient and compact solution for all types of renovation projects and new build single-family homes. It is the

obvious alternative to current energy sources such as oil or gas boilers.

DHW AIR produces domestic hot water and heats the dwelling by means of the extremely energy-efficient and low-noise air to

water heat pump, AIR9. DHW AIR requires limited space and is awell-designed solution for utility rooms with no spare room for

installation of an additional tank, since a 180 l hot water tank anda 50 l buffer tank are already integral parts of the unit

This leaves generous space for both installation and service of the unit. In connection with renovation of e.g. utility rooms, we offer a

range of foundation solutions to cover old pipes so you avoid having to lay new tiles or carry out a complete renovation.

The AIR9 air to water heat pump (outdoor unit) is very quiet and it is therefore easy to find a place for it where it causes no disturbance

to the surroundings. If necessary, it is possible to limit the capacity of the heat pump during certain time periods. DHW AIR comes with

a ‘Silent mode’ function where you can set a night and a seasonal limit.

The AIR air to water heat pump heats the dwelling via floor heating or radiators. It draws energy from the outdoor air and operates at

down to -17 ºC. The heat pump has supplemental electric heating to help with the central heating during periods of very cold weather.

DHW AIR also comes with supplemental electric heating to help heat domestic hot water during periods of increased domestic water

consumption.

Comes with a CTS602 control system with an HMI panel as well as a Nilan gateway for an app solution.

Unit - DHW AIR indoor unit

1. Control panel (HMI touch panel)

2. Electrical connections panel

3. Gateway for App option

4. Expansion vessel for central heating circuit 10 litres

5. Automation CTS602

6. Automatic air vent valve and manometer

7. Emergency mode central heating

8. Buffer tank 50 litres

9. Supplemental electric heating for central heating 1x 3 kW &

1x2 kW

10. Filling tap 1/2"

11. Particle filter with shut-off valve

12. Circulation pump P1 (charging circuit) 130 mm

13. Top cover for access to Electronically monitored sacrificial

anode and supplemental electric heater

14. Electronically monitored sacrificial anode

15. Emergency mode domestic hot water

16. 1.5 kW supplemental electric heater (with overheat protec-

tion)

17. 180 litres hot water tank (DHW)

18. Plumbing connections

Unit - the outdoor unit

Front: Closed and open

Rear side: Closed and open

AIR outdoor unit:

1. Fan

2. Evaporator

3. Heat pump

4. Condensate drain with integral heating cable

5. Connections to/from the indoor unit (liquid)

6. Electrical connection cable for AIR heat pump outdoor unit (screw ter-

minal)

7. Communication cable with connector for connection to the indoor unit

(RJ45)

Side: Open

Temperature sensor overview

Temperature sensor in the DHW AIR out door unit:

T16: Before the condenser (to outdoor unit)

T17: After the condenser (from outdoor unit)T20: Udetempera-

tur

T23: Evaporator temperature

T35: Pressure pipe temperature

Temperature sensor in the DHW AIR indoor unit

T18: Buffer tank (supply flow, central heating)

T21: Top of the DHW tank

T22: Bottom of the DHW tank

T16

T23

T17

T18

T21

T22

T35

T20

Dimensional drawing

DHW AIR Indoor unit:

DHW AIR9 outdoor unit:

All measurements are indicated in mm.

Weight DHW AIR indoor unit: 185 kg

Seen from below The bottom seen from above

264

1256

1562

599

261

427

201

350

900

1531

167 432

Ø32

874

568

422 159

347

630

197 61

900

693

673

938

1318

All measurements are indicated in mm.

Weight DHW AIR outdoor unit: 165 kg

Piping diagram

* Everything within the red box is Nilan delivery.

8. Connection 1"

9. Supplemental electric heating1,5 kW, DHW tank

10. Circulation pump P1 (charging circuit) 130mm

11. Supplemental electric heating buffer tank 1x3kW & 1x2kW

12. Temperature sensor T18 buffer tank

13. Flexsible hose 10mm

14. Automatic air vent valve

15. Expansion vessel 10L

16. Manometer 0-4Bar

17. Safety valve 2,5 bar

18. Particle filter with shut-off valve

19. Circulation pump P2 central heating circuit (not Nilan sup-

ply)

20. Electronically monitored sacrificial anode 5/4”

21. Filling tap 1/2"

22. 3-way valve

23. Temperature sensor T21 DHW tank top

24. Temperature sensor T22, DHW tank bottom

25. Temperature sensor T23, evaporator

26. Temperature sensor T20 outdoor temperature

27. Temperature sensor T17 after condenser

28. Temperature sensor T16 before condenser

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Accessories

Extension cable HMI user panel for 8-pin plug

Cover plate HMI user panel

Safety group

Trolley

Set of doors outdoor unit

The control panel for the 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 plugs, 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.

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

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.

If you position the AIR outdoor unit so the rear side of the component is visible, you can order a set of doors

that are identical to the front of the outdoor unit. You thereby achieve a uniform look.

Set-up

Mounting

Transport of indoor unit into the building

The DHW AIR indoor unit is delivered fully assembled and wrapped on a pallet.

You can use a Nilan lifting dolly to lift the indoor unit from the pallet and transport it into the building. You thereby avoid heavy lifting.

Positioning the indoor unit

The DHW AIR indoor unit should be placed on a flat and firm surface, and with good access for servicing.

At the bottom of the sides and the back of the cabinet the metal has been punched. Cable holes are therefore easily cut out, and you

do not have to punch the metal yourself. We have likewise made cable holes and access for changing the electronic sacrificial anode in

the top cover.

ATTENTION

When setting up the DHW AIR indoor unit, you should take into account future services and maintenance. We therefore

recommend a minimum of 60 cm of free space in front of the indoor unit.

ATTENTION

The left side plate of the cabinet can be unscrewed to provide better access to installation and servicing of piping.

Rear side:

You can detach the metal angle from the base frame at the rear side of the

unit. That way you will be able to push the unit closer to the wall and

thereby hide connections for water.

Punches for cable holes.

Right side plate:

Punches for cable holes.

Transport into the building outdoor unit

The AIR outdoor unit is delivered wrapped in foil and fixed on a transport pallet with strapping bands.

If the surface is suitable, we recommend that you use a lifting dolly to move the unit.

Left side plate:

You can demount the entire side plate.

Unscrew the screws on the inside at the back of the cabinet. Also unscrew

the screws at the top and bottom on the outside. Following this, you will be

able to lift and detach the side of the cabinet.

Punches for cable holes.

Top cover:

At the front of the top cover there is access for changing the electronic

sacrificial anode.

At the back of the top cover we have made holes e.g. for a router cable.

ATTENTION

If you use a crane to lift in AIR, please be aware that the weight is not evenly distributed at the front and at the back.

ATTENTION

The outdoor unit must not be lifted by the doors, which is why these should be removed during transport.

Positioning an outdoor unit

An outdoor unit must always be positioned on a firm, horizontal and vibration free surface. Consider securing it to a fixed base. You

should also take into account the prevailing wind direction during the cold months when heating is required, as the performance of the

heat pump will be reduced if the outdoor unit is exposed to strong winds.

Fixing an outdoor unit to its supporting surface

If you place the outdoor unit in a windy location, e.g. on a roof, you will need to fix it to the supporting surface by using the 6 pre-drilled

holes at the bottom.

If required, you can consider putting up a windbreak. How-

ever, clearance requirements must be met.

Shown below are the horizontal minimum distances to build-

ing parts and sim. that are required for the heat pump to per-

form properly.

If you want to position AIR up against the building, it is impor-

tant that you take into account potential noise from the out-

door unit so it does not become a cause of irritation indoors.

Position AIR so air is supplied from the dwelling. The air gains

added energy from solar heating of the building walls during

the day and from general heat loss from the building. This can

then improve the efficiency of the heat pump.

AIR outdoor unit seen from below: AIR outdoor base plate:

ATTENTION

The illustrations above show an example of an AIR outdoor unit. The outdoor unit is available in different versions. See

the dimensional drawing for details.

Compressor unit

Pre-drilled holes

Foundation

The illustrations above show an example of an AIR outdoor unit. See Dimensional drawing DHW AIR outdoor unit for details.

Condensate drain

During operation, condensate water will form in the evaporator of the outdoor unit. It must be able to drain away safely. A 700 mm

hose has been fitted to the condensate tray of the evaporator. You run this to a drain.

ATTENTION

DHW AIR outdoor unit should be placed on a stable surface or a poured foundation.

ATTENTION

The condensate drain must be protected against frost although the 1.5 m heating cable Ø25/4 mm, included, also helps

keep the condensate drain frost free. Frost protection of the unit is the installer’s responsibility.

The heating cable starts heating at an outdoor temperature < 2 ºC

ATTENTION

The condensate drainage system from the outdoor unit must be dimensioned so that it can drain up to 6 litres/hour. The

condensate water must be able to drain safely so it does not cause damage to the adjoining building.

If the condensate water drains into gravel, you must ensure

that the drainage system reaches the frost-free subsoil.

If the outdoor unit is placed close to the building, the conden-

sate water can simply drain into one of the downpipes. Remem-

ber to install a water trap.

The condensate water can also be led directly to a surface

water drainage system.

150 mm150 mm

Fascine

Pipe for electrical connection

min. 50mm

Drain for condensate water

Foundation

Adjustable

legs

Detaching the front doors from the DHW AIR outdoor unit

If you need to access the mechanics, electronics or the plumbing connections in the AIR outdoor unit, you can detach the upper and

lower metal plates at the front.

WARNING

Always disconnect the power supply to the unit before opening the doors to carry out e.g. installation, inspection, clean-

ing or maintenance.

1. The DHW AIR outdoor unit has an upper front plate with

slats, and a lower front plate with a smooth surface.

2. The two front plates have been mounted using keyhole

mounting brackets.

3. Detach the upper front plate by lifting it upwards and off

the screws.

4. Next, tilt the plate away from the outdoor unit and detach

it completely.

5. Detach the lower front plate in the same way by first lift-

ing the cover plate and then tilting it outwards.

6. The DHW AIR outdoor unit is now open, and you can

access the mechanics, the electronics and the plumbing

connections.

Electrical installation

Safety

It is important to check that wires are not damaged or squeezed during connection and use.

Connections overview

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.

1. Power supply DHW AIR

2. Electrical connection cable for DHW AIR outdoor unit

3. Electrical connection cable supplemental electric heating,

buffer tank

4. Electrical connection cable supplemental electric heating,

DHW tank

5. Electrical connection cable 3-way valve

6. Electrical connection cable Gateway

7. Electrical connection cable emergency mode

8. Modbus.opkobling Gateway

9. Communication cable for HMI-screen

10. 8-pin port with the possibility of connecting accessories

(the 8-pin plug is delivered with the instruction manuals)

11. Connection of PC via USB cable

12. Screw terminal for controlling heating (HEAT+COM: heating

control. COMl)

13. Connection for the user’s internet router via LAN cable (not

Nilan supply)

14. Electrical connection cable

15. Communication cable

10 9

Electrical connection unit

ATTENTION

Due to the risk of faults caused by inductive influence, the communication cable must be routed in a separate pipe with

a minimum of 100mm distance to other live cables.

Power supply for the

DHW AIR unit:

3 x 400 V + N + PE, 16 A

Remember Safety

switch

Electrical connection cablebetwwen DHW AIR indoor

unit and outdoor unit.

Remember Safety switch

Safety switch shall be placed in a position visible from

20 metres communication cable for connection between outdoor

unit and indoor unit id delivered with outdoor unit.

Change from 400V to 230V

The standard connection in the unit is 3x400V + N + PE. In those countries or areas where this standard is not applicable, the unit can

easily be switched to 1x230V + N + PE.

The terminal block can be found in the control system for AIR. Please refer to the wiring diagram enclosed with the unit.

3 x 400V + N + PE

1 x 230V + N + PE

1. In the panelboard there must be mounted

a 3x16A circuit breaker.

There must be 40A available before the cir-

cuit breaker.

2. Wires are connected between the termi-

nal block and the circuit breaker:

U = brown, V = black,

W = gray, N = blue/zero.

3. Jumpers are mounted on the access side

of the circuit breaker from 1-2 and 2-3.

4. Brown (L1) is mounted in the third wire

inlet.

Blue/zero (N) is mounted in the fourth wire

inlet.

ATTENTION

The installer carries the responsibility for the electrical installation work.

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nilan M24 DHW AIR9 Installation guide

Brand: nilan

Model: M24 DHW AIR9

Category: Split-system air conditioners

Type: Installation guide

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nilan M24 DHW AIR9 Installation guide

nilan M24 DHW AIR9 Installation guide

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