Airwell AW-WHPMA18-H93 User manual

INSTALLATION MANUAL
WELLEA MONOBLOC DF A R32
English, Français, Deutsch, Nederlands,
Español, Polsku
21.AW.WELLEA.MONO.DF.A.R32.IOM.EN.FR.DE.NL.PL.02.02
AW-WHPMA18-H93
AW-WHPMA22-H93
AW-WHPMA26-H93
AW-WHPMA30-H93

06
02
CONTENTS
04
1
3
2
06
4
07
5
09
08
6
12
11
8
14
17
18
20
13
21
21
9
27
31
32
22
42
41
10
09
09
10
10
Climate related curves
DIP switch settings overview
10.1
10.2
Selecting a location in cold climates
Selecting a location in hot climates
6.1
6.2
Application 1
Application 2
Application 3
Application 4
Application 5
Application 6
Application 7
8.1
8.2
8.3
8.4
8.5
8.6
8.7
Disassembling the unit
Main components
Electronic control box
Water piping
Adding water
Water piping insulation
Field wiring
9.1
9.2
9.3
9.4
9.5
9.6
9.7
Dimensions
Installation requirements
Drain hole position
Servicing space requirements
7.1
7.2
7.3
7.4
7
SAFETY CONSIDERATIONS
ACCESSORIES
GENERAL INFORMATION
BEFORE INSTALLATION
IMPORTANT INFORMATION FOR THE REFRIGERANT
INSTALLATION SITE
INSTALLATION PRECAUTIONS
TYPICAL APPLICATIONS
OVERVIEW OF THE UNIT
START-UP AND CONFIGURATION
32

57
12
43
43
44
44
46
57
57
11 Final checks
Test run operation (manually)
11.1
11.2
14
58
58
13
60
61
General guidelines
General symptoms
Operation parameter
Error codes
13.1
13.2
13.3
13.4
Initial start-up at low outdoor ambient temperature
Pre-operation checks
Powering up the unit
Setting the pump speed
Field settings
10.3
10.4
10.5
10.6
10.7
TEST RUN AND FINAL CHECKS
MAINTENANCE AND SERVICE
TROUBLE SHOOTING
TECHNICAL SPECIFICATIONS
70
15
69
INFORMATION SERVICING

01
The picture and function described in this manual contain the backup heater components.
NOTE
Wiring diagram:
Hydraulic System
Refrigerant System
Terminal Block
Electric Control System

Servicing shall only be performed as recommended by the equipment manufacturer. Maintenance and repair requiring
the assistance of other skilled personnel shall be carried out under the supervision of the person competent in the use
of flammable refrigerants.
WARNING
Caution:Risk of fire/
flammable materials
02
Read these instructions carefully before installation. Keep this manual in a handy for future peference.
Improper installation of equipment or accessories may result in electric shock, short-circuit, leakage, fire or other
damage to the equipment. Be sure to only use accessories made by the supplier, which are specifically designed for
the equipment and make sure to get installation done by a professional.
All the activitie described in this manual must be carried out by a licensed technician. Be sure to wear adequate
personal protection equipment such as gloves and safety glasses while installation the unit or carrying out mainte-
nance activities.
Contact your dealer for any furthur assistance.
INFORMATION
i
1 SAFETY PRECAUTIONS
The precautions listed here are divided into the following types.They are quite important, so be sure to follow them carefully.
Meanings of DANGER, WARNING, CAUTION and NOTE symbols.
Indicates an imminently hazardous situation which if not avoided, will result in death or serious injury.
DANGER
Indicates a potentially hazardous situation which if not avoided, could result in death or serious injury.
WARNING
CAUTION
Indicates a potentially hazardous situation which if not avoided, may result in minor or moderate injury.
It is also used to alert against unsafe practices.
Indicates situations that could only result in accidental equipment or property damage.
NOTE
Explanation of symbols displayed on the indoor unit or outdoor unit
WARNING
CAUTION
CAUTION
CAUTION
CAUTION
This symbol shows that this appliance used a flammable refrigerant. If the refrigerant is
leaked and exposed to an external ignition source, there is a risk of fire.
This symbol shows that the operation manual should be read carefully.
This symbol shows that a service personnel should be handling this equipment with
reference to the installation manual.
This symbol shows that a service personnel should be handling this equipment with
reference to the installation manual.
This symbol shows that information is available such as the operating manual or
installation manual.

03
Before touching electric terminal parts, turn off power switch.
When service panels are removed, live parts can be easily touched by accident.
Never leave the unit unattended during installation or servicing when the service panel is removed.
Do not touch water pipes during and immediately after operation as the pipes may be hot and could burn your
hands. To avoid injury, give the piping time to return to normal temperature or be sure to wear protective gloves.
Do not touch any switch with wet fingers. Touching a switch with wet fingers can cause electrical shock.
Before touching electrical parts, turn off all applicable power to the unit.
DANGER
Tear apart and throw away plastic packaging bags so that children will not play with them.Children playing with
plastic bags face danger of death by suffocation.
Safely dispose of packing materials such as nails and other metal or wood parts that could cause injuries.
Ask your dealer or qualified personnel to perform installation work in accordance with this manual. Do not install the
unit yourself. Improper installation could result in water leakage, electric shocks or fire
Be sure to use only specified accessories and parts for installation work. Failure to use specified parts may result in
water leakage, electric shocks, fire, or the unit falling from its mount.
Install the unit on a foundation that can withstand its weight. Insufficient physical strength may cause the equipment
to fall and possible injury.
Perform specified installation work with full consideration of strong wind, hurricanes, or earthquakes. Improper
installation work may result in accidents due to equipment falling.
Make certain that all electrical work is carried out by qualified ersonnel according to the local laws and regulations
and this manual using a separate circuit. Insufficient capacity of the power supply circuit or improper electrical
construction may lead to electric shocks or fire.
Be sure to install a ground fault circuit interrupter according to local laws and regulations. Failure to install a ground
fault circuit interrupter may cause electric shocks and fire.
Make sure all wiring is secure. Use the specified wires and ensure that terminal connections or wires are protected
from water and other adverse external forces. Incomplete connection or affixing may cause a fire.
When wiring the power supply, form the wires so that the front panel can be securely fastened. If the front panel is
not in place there could be overheating of the terminals, electric shocks or fire.
After completing the installation work, check to make sure that there is no refrigerant leakage.
Never directly touch any leaking refrigerant as it could cause severe frostbite.Do not touch the refrigerant pipes
during and immediately after operation as the refrigerant pipes may be hot or cold, depending on the condition of
the refrigerant flowing through the refrigerant piping, compressor and other refrigerant cycle parts. Burns or frostbite
are possible if you touch the refrigerant pipes. To avoid injury, give the pipes time to return to normal temperature
or, if you must touchthembe sure to wear protective gloves.
Do not touch the internal parts (pump, backup heater, etc.) during and immediately after operation. Touching the
internal parts can cause burns. To avoid injury, give the internal parts time to return to normal temperature or, if you
must touch them, be sure to wear protective gloves.
WARNING
Ground the unit.
Grounding resistance should be according to local laws and regulations.
Do not connect the ground wire to gas or water pipes, lightning conductors or telephone ground wires.
Incomplete grounding may cause electric shocks.
- Gas pipes：Fire or an explosion might occur if the gas leaks.
- Water pipes：Hard vinyl tubes are not effective grounds.
- Lightning conductors or telephone ground wires：Electrical threshold may rise abnormally if struck by a lightning
bolt.
Install the power wire at least 3 feet (1 meter) away from televisions or radios to prevent interference or noise.
(Depending on the radio waves, a distance of 3 feet (1 meter) may not be sufficient to eliminate the noise.)
Do not wash the unit. This may cause electric shocks or fire. The appliance must be installed in accordance with
national wiring regulations. If the supply cord is damaged, it must be replaced by the manufacturer, its service agent
or similarly qualified persons in order to avoid a hazard.
CAUTION

04
NOTE
About Fluorinated Gasses
- This air-conditioning unit contains fluorinated gasses. For specific information on the type of gas and the amount,
please refer to the relevant label on the unit itself. Compliance with national gas regulations shall be observed.
- Installation, service, maintenance and repair of this unit must be performed by a certified technician.
- Product uninstallation and recycling must be performed by a certified technician.
- If the system has a leak-detection system installed, it must be checked for leaks at least every 12 months. When
the unit is checked for leaks, proper record-keeping of all checks is strongly recommended.
Do not install the unit in the following places:
- Where there is mist of mineral oil, oil spray or vapors. Plastic parts may deteriorate, and cause them to come loose
or water to leak.
- Where corrosive gases (such as sulphurous acid gas) are produced. Where corrosion of copper pipes or soldered
parts may cause refrigerant to leak.
- Where there is machinery which emits electromagnetic waves. Electromagnetic waves can disturb the control
system and cause equipment malfunction.
- Where flammable gases may leak, where carbon fiber or ignitable dust is suspended in the air or where volatile
flammables such as paint thinner or gasoline are handled. These types of gases might cause a fire.
- Where the air contains high levels of salt such as near the ocean.
- Where voltage fluctuates a lot, such as in factories.
- In vehicles or vessels.
- Where acidic or alkaline vapors are present.
This appliance can be used by children 8 years old and above and persons with reduced physical, sensory or mental
capabilities or lack of experience and knowledge if they are supervised or given instruction on using the unit in a
safe manner and understand the hazards involved. Children should not play with the unit. Cleaning and user mainte-
nance should not be done by children without supervision.
Children should be supervised to ensure that they do not play with the appliance.
If the supply cord is damaged, it must be replaced by the manufaturer or its service agent or a similarly qualified
person.
DISPOSAL: Do not dispose this product as unsorted municipal waste. Collection of such waste seperatelly for
special treatment is necessary. Do not dispose of electrical appliances as municipal waste, use seperate collection
facilities. Contact your local goverment for information regarding the collection systems available. If electrical
appliances are disposed of in landfills or dumps, hazardous substance can leak into the groudwater and get into the
food chain, damaging your health and well-being.
The wiring must be performed by professional technicians in accordance with national wiring regulation and this
circuit diagram. An all-pole disconnection device which has at least 3mm seperation distance in all pole and a
residualcurrent device(RCD) with the rating not exceeding 30mA shall be incorporated in the fixed wiring according
to the national rule.
Confirm the safety of the installation area ( walls, floors, etc. ) without hidden dangers such as water, electricity, and
gas.Before wiring/pipes.
Before installation , check whether the user's power supply meets the electrical installation requirements of unit (
including reliable grounding , leakage , and wire diameter electrical load, etc. ). If the electrical installation require-
ments of the product are not met, the installation of the product is prohibited until the product is rectified.
When installing multiple air conditioners in a centralized manner, please confirm the load balance of the three-phase
power supply, and multiple units are prevented from being assembled into the same phase of the three-phase power
supply.
Product installation should be fixed firmly, Take reinforcement measures, when necessary.
In order to ensure the safety of the product, please restart the unit at least once every 3 months, so that the unit can
carry out self-inspection operation.
2 GENERAL INTRODUCTION
These units are used for both heating and cooling applications.They can be combined with fan coil units, floor heating
applications, low temperature high efficiency radiators, domestic hot water tanks (field supply) and solar kits (field supply).
A wired controller is supplied with the unit .
Room thermostat (field supply) can be connected to the unit(room thermostat should be kept away from heating source
when selecting the installation place).

05
-21
39
-16
48
-11
58
33
57
In heating mode, the maximum leaving water flow temperature
(T1stoph) that heat pump can reach in different outdoor
temperature (T4) is listed below:
In DHW mode, the maximum domestic hot water tempera-
ture(T5stop) that heat pump can reach in different outdoor
temperature(T4) is listed below:
The unit have a freeze prevention function that uses the heat
pump to keep the water system safe from freezing in all
conditions. Since a power failure may happen when the unit is
unattended, It's suggested to use anti-freezing flow switch in
the water system. (Refer to 9.4 Water piping).
In cooling mode, the minimum leaving water flow tempera-
ture(T1stoph) that the unit can reach in different outdoor
temperature(T4) is listed below:
COOLING MODE
Outdoor temp. (°C)
Water flow temp. (°C)
Outdoor temp. (°C)
Water flow temp. (°C)
Outdoor temp. (°C)
Water flow temp. (°C)
≤10
10
14
8
18
6
11
9
15
7
19
6
12
9
16
7
20
5
13
8
17
6
≥21
5
-25
35
-20
40
-15
50
34
56
-10~30
60
-24
35
-19
42
-14
52
35
55
-23
35
-18
44
-13
54
31
59
-22
37
-17
46
-12
56
32
58
Outdoor temp. (°C)
Water flow temp. (°C)
Outdoor temp. (°C)
Water flow temp. (°C)
Outdoor temp. (°C)
Water flow temp. (°C)
Outdoor temp. (°C)
Water flow temp. (°C)
Outdoor temp. (°C)
Water flow temp. (°C)
①Heat pump capacity.
②Required heating capacity (site dependent).
③Additional heating capacity provided by backup heater.
Tbivalent Outdoor temperature
Capacity/Load
③
②①
Solar kit for domestic hot water tank(field supply)
An optional solar kit can be connected to the unit.
Remote alarm kit (field supply) can be connected to
the unit.
Operation range
HEATING MODE
If you add the backup heater in the system, the backup heater
can increase the heating capacity during cold outdoor
temperatures. The backup heater also serves as a backup in
case of malfunctioning and for freeze protection of the outside
water piping during winter time. The capacity of backup heater
for different units is listed below.
Outdoor temp. (°C) -25~-21-20~-14 -15~-11 -10~-4
DHW Water flow
temp. (°C)
DHW Water flow
temp. (°C)
DHW Water flow
temp. (°C)
35 40 45 48
55 55
53 53
50 48
Outdoor temp. (°C) 0~4 5~9 10~14
-5~-1
Outdoor temp. (°C)
15~19
25~29 30~34
20~24
50
50
35~39 40~43
48 45
Outdoor temperature(°C)
Water flow temperature (°C)
Outdoor temperature(°C)
Water flow temperature (°C)
DOMESTIC WATER HEATING MODE
Outdoor temperature(°C)
Water flow temperature (°C)
No heat pump operation, IBH or AHS only
Water flow temperature drop or rise interval
If IBH/AHS setting is valid, only IBH/AHS turns on;
If IBH/AHS setting is invalid, only heat pump turns on;

*If the system is installed in parallel,Tbt1 must be connected and installed in the balance tank.
**If the volume of the balance tank is relatively large, in order to ensure the use effect, it is recommended to add a Tbt2 sensor
in the lower part of the balance tank.
**
When the units are connected in parallel, such as when the communication between the unit is unstable (such as an Hd fault code),
add a network matching wire between the ports H1 and H2 at the terminal of the communication system;
Sensors Tbt1, Tbt2, T5 and extension wire can be shared, sensors Tw2, Tsolar and extension wire can be shared, if these functions
are needed at the same time, please customize these sesors ande extension additionally.
3 ACCESSORIES
06
To avoid injury, do not touch the air inlet or aluminum fins of the unit.
Do not use the grips in the fan grills to avoid damage.
The unit is top heavy! Prevent the unit from falling due to improper inclination during handling.
CAUTION
Before installation: Be sure to confirm the model name and the serial number of the unit.
Handling: Due to relatively large dimensions and heavy weight, the unit should only be handled using lifting tools with
slings. The slings can be fitted into foreseen sleeves at the base frame that are made specifically for this purpose.
4 BEFORE INSTALLATION
The position of barycenter for different unit can be seen in the
picture below. (unit:mm)
304
670
425
670
Installation and owner’s
manual(this book)
Quantity
Operation manual
Technical data manual
Shape
Name Name
Accessories supplied with the unit
Adapter for inlet water pipe
+sealing ring
Thermistor for domestic hot water
tank (T5) *
1
1
1
QuantityShape
1+1
Tighten belt for customer wiring use 2
1
1
1
Extension wire for T5
1
Y-shape filter 1
Water outlet connection pipe
assembly+rubber stopper
Wired controller
2+2
1
Network matching wire*** 1
Extension wire for Tbt1
Thermistor for balance tank (Tbt1)*
11
Extension wire for Tbt2
Thermistor for balance tank (Tbt2)**
11
Extension wire for Tw2
Thermistor for Zone 2 flow temp. (Tw2)
11
Extension wire for Tsolar
Thermistor for solar temp. (Tsolar)
Accessories avaliable from supplier
The hook and
barycenter of the
unit should be on
a line in vertical
direction to
prevent improper
inclination
Make the rope go
through the lifting
holes from both
the right and left
sides in the
wooden collet
≥1000mm
Energy label 1

07
5 IMPORTANT INFORMATION FOR THE REFRIGERANT
This product has the fluorinated gas, it is forbidden to release to air.
Refrigerant type: R32; Volume of GWP: 675.
GWP=Global Warming Potential
Factory charged refrigerant volume in the unit
Refrigerant/kg Tonnes CO2equivalent
18kW 5.00 3.38
22kW 5.00 3.38
26kW 5.00 3.38
30kW 5.00 3.38
Model
Select an installation site where the following condition sare satisfied and one that meets with your customer's approval.
- Places that are well-ventilated.
- Places where the unit does not disturb next-door neighbors.
- Safe places which can bear the unit's weight and vibration and where the unit can be installed at an even level.
- Places where there is no possibility of flammable gas or product leak.
- The equipment is not intended for use in a potentially explosive atmosphere.
- Places where servicing space can be well ensured.
- Places where the units' piping and wiring lengths come within the allowable ranges.
- Places where water leaking from the unit cannot cause damage to the location (e.g. in case of a blocked drain pipe).
- Places where rain can be avoided as much as possible.
- Do not install the unit in places often used as a work space. In case of construction work (e.g. grinding etc.) where a lot of
dust is created, the unit must be covered.
- Do not place any object or equipment on top of the unit (top plate)
- Do not climb, sit or stand on top of the unit.
- Be sure that sufficient precautions are taken in case of refrigerant leakage according to relevant local laws and regulations.
- Don’t install the unit near the sea or where there is corrosion gas.
When installing the unit in a place exposed to strong wind, pay special attention to the following.
6 INSTALLATION SITE
There is flammable refrigerant in the unit and it should be installed in a well-ventilated site. If the unit is installed
inside, an additional refrigerant detection device and ventilation equipment must be added in accordance with the
standard EN378. Be sure to adopt adequate measures to prevent the unit from being used as a shelter by small
animals.
Small animals making contact with electrical parts can cause malfunction, smoke or fire. Please instruct the custom-
er to keep the area around the unit clean.
WARNING
Frequency of Refrigerant Leakage Checks
- For unit that contains fluorinated greenhouse gases in quantities of 5 tonnes of CO2equivalent or more,but of
less than 50 tonnes of CO2equivalent,at least every 12 months, or where a leakage detection system is installed,
at least every 24 months.
- For unit that contains fluorinated greenhouse gases in quantities of 50 tonnes of CO2equivalent or more, but of
less than 500 tonnes of CO2 equivalentat least every six months, or where a leakage detection system is installed,
at least every 12 months.
- For unit that contains fluorinated greenhouse gases in quantities of 500 tonnes of CO2equivalent or more,at
least every three months, or where a leakage detection system is installed,at least every six months.
- This air-conditioning unit is a hermetically sealed equipment that contains fluorinated greenhouse gases.
- Only certificated person is allowed to do installation, operation and maintenance.
CAUTION

08
Strong winds of 5 m/sec or more blowing against the unit's air outlet causes a short circuit (suction of discharge air), and this
may have the following consequences:
- Deterioration of the operational capacity.
- Frequent frost acceleration in heating operation.
- Disruption of operation due to rise of high pressure.
- When a strong wind blows continuously on the front of the unit, the fan can start rotating very fast until it breaks.
To prevent exposure to wind, install the unit with its
suction side facing the wall.
Never install the unit at a site where the suction side
may be exposed directly to wind.
To prevent exposure to wind, install a baffle plate on
the air discharge side of the unit.
In heavy snowfall areas, it is very important to select
an installation site where the snow will not affect the
unit. If lateral snowfall is possible, make sure that the
heat exchanger coil is not affected by the snow (if
necessary construct a lateral canopy).
6.1 Selecting a location in cold climates
Refer to "Handling" in section “4 Before installation”
When operating the unit in cold climates, be sure
to follow the instructions described below.
NOTE
①Construct a large canopy.
②Construct a pedestal.
Install the unit high enough off the ground to prevent it
from being buried in snow.
In case of strong wind and the wind direction can be
foreseen,refer to the figures below for installation of the
unit(any one is OK):
Turn the air outlet side toward the building's wall, fence
or screen.
Make sure there is enough room to do the installation.
Set the outlet side at a right angle to the direction of the
wind.
Prepare a water drainage channel around the
foundation, to drain waste water from around the unit.
If water does not easily drain from the unit, mount the
unit on a foundation of concrete blocks, etc. (the
height of the foundation should be about 100 mm
(3.93 in).
If you install the unit on a frame, please install a
waterproof plate (about 100 mm) on the underside of
the unit to prevent water from coming in from the low
side.
When installing the unit in a place frequently exposed
to snow, pay special attention to elevate the founda-
tion as high as possible.
If you install the unit on a building
frame, please install a waterproof plate
(field supply) (within 150mm of the
underside of the unit) in order to avoid
drain water dripping. (See the picture in
the right).
＞300mm
＞3000mm
①
②
In normal condition,refer to the figures below for install-
ation of the unit:

09
6.2 Selecting a location in hot climates
As the outdoor temperature is measured via the outdoor unit air thermistor, make sure to install the outdoor unit in the shade or
a canopy should be constructed to avoild direct sunlight, so that it is not influenced by the sun’s heat, otherwise protection may
be possible to the unit.
7.1 Dimensions
7 INSTALLATION PRECAUTIONS
Check the strength and level of the installation ground so that the unit may not cause any vibrations or noise during its
operation.
In accordance with the foundation drawing in the figure, fix the unit securely by means of foundation bolts. (Prepare six sets
each of Φ10 Expansion bolts, nuts and washers which are readily available in the market.)
Screw in the foundation bolts until their length is 20 mm from the foundation surface.
7.2 Installation requirements
Model A B C D E F G H I J
1129 494 528 668 192 98 206 1558 558 143
K
400
L
44018/22/26/30 kW
(unit: mm)
(unit: mm)
Concrete basement
h≥100mm
Rubber
shocking
proof mat
≥100
≥80
Φ10 Expansion
bolt
Solid
ground
or roofing
H
J
1-1/4”
I
E D G
B
FC
A
KL

10
7.3 Drain hole position
7.4 Servicing space requirements
It's necessary to install an electrical heating belt if water can't drain out in cold weather.
NOTE
1）Single unit installation
2）Parallel connect the two units or above
3）Parallel connect the front with rear sides
>600
>3000
>300
>3000 >1000 >6000 >4000 >300
>300
>600
>300
>0003
(Wall or obstacle)
Maintain the electric
wire and pipeline
Air outlet
Air inlet
Air inlet
Drain hole

11
8.1 Application 1
Space heating with a room thermostat connected to the unit.
The application examples given below are for illustration only.
8 TYPICAL APPLICATIONS
Unit operation and space heating：
When a room thermostat is connected to the unit and when there is a heating request from the room thermostat, the unit will
start operating to achieve the target water flow temperature as set on the user interface. When the room temperature is above
the thermostat set point in the heating mode, the unit will stop operating. The circulation pump (1.7) and (10) will also stop
running. The room thermostat is used as a switch here.
The volume of balance tank(8) should be greater than 40L. The drain valve (6) should be installed at the lowest positon
of the system. Pump_o (10) should be controlled by outdoor unit and connect to corresponding port in the outdoor
unit(refer to 9.7.6 Connection for other components/For outside circulation pump P_o).
NOTE
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
2
3
Outdoor unit
Manometer
Pressure relief valve
Expansion vessel
Plate heat exchanger
Air purge valve
Flow switch
P_i: Circulation pump inside the unit
Y-shape filter
Stop valve (field supply)
Assembly unit Assembly unit
Coding Coding
4
5
6
7
8
8.1
8.2
9
10
11
FHL 1…n
Wired controller
Room thermostat (field supply)
Drain valve (field supply)
Fill valve (field supply)
Balance tank (field supply)
Air purge valve
Drain valve
Expansion vessel (field supply)
P_o: Outside circulation pump (field supply)
Collector / distributor (field supply)
Floor heating loop (field supply)
8.1
8.2
236 7 8
FHL1 FHL2 FHLn----
----
9
T
10 11
4
5
1
1.5
1.4
1.2
1.3
1.7
1.6
1.1

12
8.2 Application 2
Space heating without room thermostat connected to the unit. Domestic hot water tank is connected to the unit, and the tank is
with solar heating system.
The volume of balance tank(8) should be greater than 40L. The drain valve (6) should be installed at the lowest positon
in the system. Pump(10) should be controlled by outdoor unit and connect to corresponding port in the outdoor unit(refer
to 9.7.6 Connection for other components/For outside circulation pump P_o).
NOTE
Make sure to connect the thermostat wires to the correct terminals, method B should be selected (see "For room
thermostat" in 9.7.6 connection for other components). To correctly configure the ROOM THERMOSTAT in the FOR
SERVICEMAN mode see 10.7 Field settings/ROOM THERMOSTAT.
NOTE
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
2
3
Assembly unit Assembly unit
Coding Coding
FHL 1…n
8.2
9
10
11
12
12.1
12.2
12.3
13
14
15
16
18
4
6
7
8
8.1
Drain valve
Outdoor unit
Manometer
Pressure relief valve
Expansion vessel
Plate heat exchanger
Air purge valve
Flow switch
P_i: Circulate pump in the unit
Y-shape filter
Stop valve (field supply)
Wired controller
Drain valve (field supply)
Fill valve (field supply)
Balance tank (field supply)
Air purge valve
20
21
17
Floor heating loop (field supply)
Expansion vessel (field supply)
P_o: Outside circulation pump (field supply)
Collector / distributor (field supply)
Domestic hot water tank (field supply)
Air purge valve
Heat exchanger coil
Booster heater
T5: DHW tank temp. sensor
Hot water tap (field supply)
P_d: DHW pump (field supply)
One way valve (field supply)
SV1: 3-way valve (field supply)
Solar energy kit(field supply)
P_s: Solar pump(field supply)
Bypass valve(field supply)
FHL1 FHL2 FHLn
----
----
12.3
12.2
12.1
12.1
236 7
8.1
8.2
8
9
12
13
14
15
16
10
11
20 21 4
17
1
1.5
1.4
1.2
1.3
1.7
1.6
1.1

13
Circulation pump operation
The circulation pump (1.7) and (10) will operate as long as the unit is on for space heating.
The circulation pump (1.7) will operate as long as the unit is on for heating domestic hot water (DHW).
Space heating
1) The unit (1) will operate to achieve the target water flow temperature set on the wired controller.
2) The bypass valve should be selected so that at all times the minimum water flow as mentioned in 9.4 Water piping is
guaranteed.
Domestic water heating
1) When the domestic water heating mode is enabled (either manually by the user, or automatically through scheduling)
the target domestic hot water temperature will be achieved by a combination of the heat exchanger coil and the electrical
booster heater (when the booster heater in the tank is set to YES).
2) When the domestic hot water temperature is below the user configured set point, the 3-way valve will be activated to
heat the domestic water by means of the heat pump. If there is a huge demand for hot water or a high hot water tempera-
ture setting, the booster heater (12.3) can provide auxiliary heating.
The unit can be configured so that at low outdoor temperatures, water is exclusively heated by the booster heater. This
assures that the full capacity of the heat pump is available for space heating.
Details on domestic hot water tank configuration for low outdoor temperatures (T4DHWMIN) can be found in 10.7 Field
settings/How to set the DHW MODE.
NOTE
Make sure to fit the 3-way valve correctly. For more details, refer to 9.7.6 Connection for other components/For
3-way valve SV1.
CAUTION
8.3 Application 3
Space cooling and heating application with a room thermostat suitable for heating/cooling changeover when connected to the
unit. Heating is provided through floor heating loops and fan coil units. Cooling is provided through the fan coil units only.
Domestic hot water is provided through the domestic hot water tank which is connected to the unit.
FHL1 FHL2 FHLn----
----
FCU1 FCU2 FCUn----
----
236 7
8.1
8.2
8
12.1
12.2
12.3
12
T
13 14
15
16
11
11
19
10
9
4
5
18
12.1
21
20
17
1
1.5
1.4
1.2
1.3
1.7
1.6
1.1

14
The volume of balance tank(8) should be greater than 40L.The drain valve (6) should be installed at the lowest positon
of the system. Pump(10) should be controlled by outdoor unit and connect to corresponding port in the outdoor unit(refer
to 9.7.6 Connection for other components/For outside circulation pump P_o).
NOTE
Pump operation and space heating and cooling
The unit will switch to either heating or cooling mode according to the setting of room thermostat. When space heating/cool-
ing is requested by the room thermostat (5), the pump will start operating and the unit (1) will switch to heating mode/cooling
mode. The unit (1) will operate to achieve the target cold/hot water leaving temperature. In the cooling mode. the motorized
3-way valve (19) will close to prevent cold water running through the floor heating loops (FHL).
The ON/OFF setting of the heating/cooling operation cannot be done on the user interface, the target outlet water temperature
should be set in the user interface.
Domestic water heating
Domestic water heating is as described in 8.2 Application 2.
Make sure to connect the thermostat wires to the correct terminals and to configure the ROOM THERMOSTAT in the
wired controller correctly (see 10.7 Field settings/ROOM THERMOSTAT). Wiring of the room thermostat should follow
method A as described in 9.7.6 connection for other components/For room thermostat.
Wiring of the 3-way valve (19) is different for a NC (normal closed) valve and a NO (normal open) valve! Make sure to
connect to the correct terminal numbers as detailed on the wiring diagram.
CAUTION
8.4 Application 4
Space heating with an auxiliary boiler (alternating operation).
Space heating application by either the unit or by an auxiliary boiler connected in the system.
The unit controlled contact (also called "permission signal for the auxiliary boiler") is determined by the outdoor temperature
(thermistor located at the outdoor unit). See 10.7 Field settings/OTHER HEATING SOURCE.
Bivalent operation is possible for both space heating operation and domestic water heating operation.
If the auxiliary boiler only provides heat for space heating, the boiler must be integrated in the piping work and in the field
wiring according to the illustration for application a.
If the auxiliary boiler is also providing heat for domestic hot water, the boiler can be integrated in the piping work and in the
field wiring according to the illustration for application b. In this condition, the unit can sent ON/OFF signal to boiler in heating
mode, but the boiler control itself in DHW mode.
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
2
3
Assembly unit Assembly unit
Coding Coding
6
7
8
8.1
8.2
9
10
11
FHL 1…n
12
12.1
12.2
12.3
13
14
15
16
18
4
5
Outdoor unit
Manometer
Pressure relief valve
Expansion vessel
Plate heat exchanger
Air purge valve
Flow switch
P_i: Circulation pump inside the unit
Y-shape filter
Stop valve (field supply)
Wired controller
Drain valve (field supply)
Fill valve (field supply)
Balance tank (field supply)
Air purge valve
Room thermostat (field supply)
19
FCU 1...n
Drain valve
Expansion vessel (field supply)
P_o: Outside circulation pump (field supply)
Collector / distributor (field supply)
Floor heating loop (field supply)
Domestic hot water tank (field supply)
Air purge valve
Heat exchanger coil
Booster heater
T5: DHW tank temp. sensor
Hot water tap (field supply)
P_d: DHW pump (field supply)
One way valve (field supply)
SV1: 3-way valve (field supply)
SV2: 3-way valve (field supply)
Fan coil units (field supply)
17 Bypass valve(field supply)
20
21
Solar energy kit(field supply)
P_s: Solar pump(field supply)

15
8.4.2 Application b
Boiler provide heat for space heating and domestic water heating, the ON/OFF of boiler is controlled by itself for domestic water
heating.
8.4.1 Application a
Boiler provide heat for space heating only
Be sure that the boiler and the integration of the boiler in the system is in accordance with relevant local laws and regula-
tions.
CAUTION
FHL1 FHL2 FHLn
----
----
23
12.1
12.2
12.3
12
13
14
15
16
16
22 11
6 7
8.1
8.2
8
10
9
4
AHS
18
1
1.5
1.4
1.2
1.3
1.7
1.6
1.1
AHS
FHL1 FHL2 FHLn
----
----
23
12.1
12.2
12.3
12
13
14
15
16
16
16
22 11
6 7
8.1
8.2
8
10
9
4
18
1
1.5
1.4
1.2
1.3
1.7
1.6
1.1

16
8.4.3 Application c
Boiler provide heat for domestic water heating. The ON/OFF of boiler controlled by unit.
The volume of balance tank(8) should be greater than 40L. The drain valve (6) should be installed at the lowest positon
of the system. Temperature sensor T1 must be installed at the outlet ofAHS, and connect to the corresponding port in
the main control board of hydraulic module(refer to 9.3.1 Main control board of hydraulic module), pump(10) should
be controlled by outdoor unit and connect to corresponding port in the outdoor unit(refer to 9.7.6 Connection for other
components/For outside circulation pump P_o).
NOTE
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
2
3
Assembly unit Assembly unit
Coding Coding
FHL 1…n
8.2
9
10
11
12
12.1
12.2
12.3
13
14
15
16
18
4
6
7
8
8.1
Drain valve
Outdoor unit
Manometer
Pressure relief valve
Expansion vessel
Plate heat exchanger
Air purge valve
Flow switch
P_i: Circulation pump inside the unit
Y-shape filter
Stop valve (field supply)
Wired controller
Drain valve (field supply)
Fill valve (field supply)
Balance tank (field supply)
Air purge valve
22
AHS
//
Floor heating loop(field supply)
Expansion vessel (field supply)
P_o: Outside circulation pump (field supply)
Collector / distributor (field supply)
Domestic hot water tank (field supply)
Air purge valve
Heat exchanger coil
Booster heater
T5: DHW tank temp. sensor
Hot water tap (field supply)
P_d: DHW pump (field supply)
One way valve (field supply)
SV1: 3-way valve (field supply)
T1: Outlet water temperature sensor(field supply)
Additional heating source(boiler)(field supply)
FHL1 FHL2 FHLn
----
----
12.1
12.2
12.3
12
13
14
15
16
4
23
11
6 7
8.1
8.2
8
10
9
Operation
When heating is required, either the unit or the boiler starts operating, depending on the outdoor temperature (refer to 10.7 field
setting/OTHER HEATING SOURCE).
18
AHS
1
1.5
1.4
1.2
1.3
1.7
1.6
1.1
As the outdoor temperature is measured via the outdoor unit air thermistor, make sure to install the outdoor unit in the shade,
so that it is not influenced by the sun’s heat.
Frequent switching can cause corrosion of the boiler at an early stage. Contact the boiler manufacturer.