ROBIN WOOD MITSUI SMK-60/CGN8 Installation instructions

M-thermal split
Indoor unit
INSTALLATION
AND OWNER’S MANUAL
Thank you very much for purchasing our product,
Before using your unit , please read this manual carefully and keep it for future reference.
IMPORTANT NOTE:
SMK-60/CGN8
SMK-80/CGN8
MONO HEAT PUMPS
INSTALLATION
AND OWNER’S MANUAL
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06
06
CONTENTS
05
06
3
2
07
4
07
5
09
10
09
08
6
15
13
13
20
18
8
21
20
20
9
29
30
30
26
43
43
10
10
10
11
11
Accessories supplied with the unit
3.1
Accessories avaliable from supplier
3.2
Initial start-up at low outdoor ambient temperature
10.1
Selecting a location in cold climates
Selecting a location in direct sunlight
6.1
6.2
Application 1
Application 2
Cascade system
Buffer tank volume requirement
8.1
8.2
8.3
8.4
Main components
Control board
Water piping
Filling water
Water piping insulation
Field wiring
9.1
9.2
9.3
9.4
9.5
9.6
Dimensions
Installation requirements
Drain hole position
Servicing space requirements
7.1
7.2
7.3
7.4
7
02
1
SAFETY PRECAUTIONS
ACCESSORIES
GENERAL INTRODUCTION
BEFORE INSTALLATION
IMPORTANT INFORMATION FOR THE REFRIGERANT
INSTALLATION SITE
INSTALLATION PRECAUTIONS
TYPICAL APPLICATIONS
OVERVIEW OF THE UNIT
START-UP AND CONFIGURATION
43
43
43
Pre-operation checks
Failure diagnosis at first installation
Installation Manual
Field settings
10.2
10.3
10.4
10.5 45

11
MENU STRUCTURE: OVERVIEW
46
12.1
12.2
Final checks
Test run operation(manually) 52
52
53
54
12
FINAL CHECKS AND TEST RUN
52
13
MAINTENANCE AND SERVICE
14
TROUBLESHOOTING
14.1
14.2
General guidelines
General symptoms 55
54
14.3 Error codes 57
59
15
TECHNICAL SPECIFICATIONS
15.1
15.2
General
Electrical specifications 59
59
11.1 Setting parameters 48
16 INFORMATION SERVICING
60

NOTE
Please remove the hollow
plate after installation.
Picture in this manual for reference only, please refer to the actual product.
The backup heater can be customized outside the unit in accordance with demands，which contains 3kW(1-phase) ,
4.5kW(1-phase), 4.5kW(3-phase), 6kW(3-phase) and 9kW(3-phase)（Please refer to the INSTALLATION & OWNER’S
MANUAL of the backup heater for details).
The backup heater(optional) and heat pump are independently powered.
01

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
Read these instructions carefully before installation. Keep this manual in a handy for future reference.
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 activities 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 installing the unit or carrying out
maintenance 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 unit
02
WARNING
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 information is available such as the operating manual or
installation manual.

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 personnel 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 touch them,be 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
03

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
maintenance 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
requirements 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.
04

Domestic hot water tank (field supply)
A domestic hot water tank(with or without booster
heater) can be connected to the unit.
The requirement of the tank is different for different
unit and material of heat exchanger.
①Heat pump capacity.
②Required heating capacity (site dependent).
③Additional heating capacity provided by backup heater.
The booster heater should be installed below the
temperature probe (T5).
The heat exchanger (coil) should be installed below the
temperature probe.
The pipe length between the outdoor unit and tank
should be less than 5 meters.
Tbivalent Ambient temperature
Capacity/Load
③
②①
Temperature
probe(T5)
Coil
Outlet
Tank booster heater
(TBH)
Inlet
2 GENERAL INTRODUCTION
These units are used for both heating and cooling applications and domestic hot water tanks.They can be combined with fan
coil units, floor heating applications, low temperature high efficiency radiators, domestic hot water tanks and solar kits, which
are all field supplied.
A wired controller is supplied with the unit .
The backup heater（Optional）can increase the heating capacity at pretty low outdoor temperature. And it also serves as
backup service in case of malfunction of heat pump or avoiding freezing of outdoor water pipes.
Tank
5kW 7~9kW
Volume of tank/L
Heat exchange area/m2
(Stainless steel coil)
Heat exchange area/m2
(Enamel coil)
Recommended
Minimum
Minimum
Model
100~250
1.4
2.0
150~300
1.4
2.0
200~500
1.6
2.5
12~16kW
Room thermostat(field supplied)
Room thermostat can be connected to the unit(room
thermostat should be kept away from heating source
when selecting the installation place).
Solar kit for domestic hot water tank(field supplied)
An optional solar kit can be connected to the unit.
Operation range
NOTE
The relationship between capacity（Load）and
ambient temperature
05
Maximum length of communication wirings between the unit and the controller is 50m.
Power cords and communication wiring must be laid out separately, they can not be placed in the same conduit.
Otherwise, it may lead to electromagnetic interference. Power cords and communication wirings should not come
in contact with the refrigerant pipe so as to prevent the high temperature pipe from damaging wirings.
Communication wirings must use shielded lines.Including indoor unit to outdoor unit PQE line ,indoor unit to controller
HA and HB line.
Outlet water (Heating mode)
Outlet water (Cooling mode)
Ambient temperature
Water pressure
Domestic hot water
+15 ~ +65 C
+5 ~ +25 C
+15~ +60 C
-25 ~ +43 C
0.1~0.3MPa
Water flow
5kW
7kW
0.40~1.25m
3
/h
0.40~1.65m
3
/h
9kW 0.40~2.10m
3
/h
12kW 0.70~2.50m
3
/h
14kW 0.70~2.75m
3
/h
16kW 0.70~3.00m
3
/h
。
。
。
。

3.2 Accessories avaliable from supplier
3 ACCESSORIES
3.1 Accessories supplied with the unit
In heating mode, the water flowing temperature (T1)
range in different outdoor temperature (T4) is listed
below:
In cooling mode, the water flowing temperature
(TW_out) range in different outdoor temperature(T4) is
listed below:
Installation and owner’s
manual(this book)
Quantity
Technical data manual
Y-shape filter
Shape
Name
1
1
1
Installation Fittings
Wired controller 1
1
Drian hose 1
Energy label 1
Network matching
wires 1
In DHW mode, the water flowing temperature(T1)
range in different outdoor temperature(T4) is listed below:
Thermistor for buffer tank temp.(Tbt)
Connection wiring of Tbt sensor
Thermistor for Zone 2 flow temp.(Tw2)
Thermistor for solar temp.(Tsolar)
Thermistor for hot water tank temp.(T5)
06
Maximum length of communication wirings between the unit and the controller is 50m.
Power cords and communication wiring must be laid out separately, they can not be placed in the same conduit.
Otherwise, it may lead to electromagnetic interference. Power cords and communication wirings should not come
in contact with the refrigerant pipe so as to prevent the high temperature pipe from damaging wirings.
Communication wirings must use shielded lines.Including indoor unit to outdoor unit PQE line ,indoor unit to controller
HA and HB line.
-5
10
5 11
19
43
25 50
T4
TW_out
Operation range by heat pump with possible limitation and
protection.
Operation range by heat pump with possible limitation and
protection.
If IBH/AHS setting is valid,only IBH/AHS turns on;
If IBH/AHS setting is invalid,only heat pump turns on,
limitation and protection may occur during heat pump operation.
Heat pump turns off,only IBH/AHS turns on.(IBH can heat the water
temperature up to 65℃, AHS can heat the water temperature up to
70℃)
Maximum inlet water temperature line for heat pump operation.
Operation range by heat pump with possible limitation and
protection.
If IBH/AHS setting is valid,only IBH/AHS turns on;
If IBH/AHS setting is invalid,only heat pump turns on,
limitation and protection may occur during heat pump operation.
Heat pump turns off,only IBH/AHS turns on.IBH can heat the water
temperature up to 65℃, AHS can heat the water temperature up to
70℃
Maximum inlet water temperature line for heat pump operation.
Protect Angle 1
Thermistor for Tbt,Tw2,Tsolar and T5 can be shared. If
necessary, you can purchase other thermistors and
connection wiring from the supplier.
Thermistor(10m) for Tbt
(or Tw2 or Tsolar or T5)
-25
0
512
19
35
45
T4
T1
-20
-15
5
24
30
55 60 6540 5025 70
-25
0
512
19
35
45
T4
T1
-20
-15
5
24
30
55 60 6540 5025
43
70

The position of barycenter for different units can be seen in the picture below.
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
5 IMPORTANT INFORMATION FOR THE REFRIGERANT
This product has the fluorinated gas, which 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
5kW 1.25 0.85
7kW 1.25 0.85
Model
B
A
(unit:mm)
Before installation
Be sure to confirm the model name and the serial number of the unit.
Transport
Due to relatively large dimensions and heavy weight, the unit should only be hoised by lifting tools with slings, please refer
to the following picture.
4 BEFORE INSTALLATION
C
A
9kW 1.25 0.85
Model AA
1 phase 5/7/9kW
B C
1 phase 12/14/16kW
3 phase 12/14/16kW
350 355 285
540 390 255
500 400 275
12kW 1.80 1.22
14kW 1.80 1.22
16kW 1.80 1.22
07
The hook and
barycenter of the
unit should be on
a line in vertical
direction to
prevent improper
inclination
Foam
Protect Angle
Protect Angle

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
customer to keep the area around the unit clean.
WARNING
Frequency of Refrigerant Leakage Checks
CAUTION
Select an installation site where the following condtions are satisfied and one that meets with your customer's approval.
08
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.
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.
Places that are well-ventilated.
Places where the unit does not disturb 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.
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.

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.
6.2 Selecting a location in direct sunlight
As the outdoor temperature is measured via the unit's
ambient temperature sensor, make sure to install the unit
in the shade or under a canopy to avoild direct sunlight,
so that it is not influenced by the sun’s heat, otherwise
the unit may be protected.
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 space to install the unit.
Set the outlet side at a right angle to the direction of the
wind.
B(mm)
≥1000
≥1500
Unit
5~9kW
12~16kW
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
foundation as high as possible.
If you install the unit on a building
frame, please install a waterproof
tray (field supply) (about 100mm, on
the underside of the unit) in order to
avoid drain water dripping. (See the
picture in the right).
In normal condition,refer to the figures below for installation of
the unit:
A(mm)
≥300
Unit
5~16kW
A
B
09
①
②
Install the unit high enough off the ground to prevent
it from being buried in snow. （The height of the
pedestal must be larger than the largest thickness of
the snow in the local history plus 10cm or more）

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 four 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
(unit: mm)
Concrete
basement
h≥100mm
Rubber
shocking
proof mat
≥100
≥80
Φ10 Expansion
bolt
Solid
ground
or roofing
10
A
BCD
E F G
I
J
K
H
L
M
Model A B C D E F G H I J
5-16kW 1040 410 458 523 191 656 64 865 165 279
K
89
(unit:mm)
L
1068
M
450

7.3 Drain hole position
7.4 Servicing space requirements
7.4.1 In case of stacked installation
It's necessary to install an electrical heating belt if water can't drain out in cold weather even the big drain hole has
opened.
NOTE
Drain hole
A
A(mm)
≥1000
≥1500
Unit
5~9kW
12~16kW
1) In case obstacles exist in front of the air outlet side. 2) In case obstacles exist in front of the air inlet side.
This drain hole is
covered by rubber
plug. If the small
drain hole can not
meet the drainage
requirements, the
big drain hole can
be used at the
same time.
≥400mm
≥500mm
11
≥400mm
≥500mm
≥300mm

In case of installing multiple units in lateral connection per row.
7.4.2 In case of multiple-row installation (for roof top use, etc.)
Unit A(mm) B1(mm) B2(mm) C(mm)
5~9kW
12~16kW
≥2500
≥1500
≥1000 ≥300 ≥600
≥3000
≥500mm
≥500mm
B2
A
C
B1
12

8.1 Application 1
The application examples given below are for illustration only.
8 TYPICAL APPLICATIONS
35
67
8
4
4.2
4.1
10
13
18
11.2
11
11.3
11.1
1317
FHL1 FHL2 FHLn
19
20
Outdoor
Indoor
1
4.3
6.1
9
AHS
13
16
2
Modbus
15
16
14
12
14
6.2
Assembly unit Code Assembly unit
Main unit 11 Domestic hot water tank (Field supply)
11.1
TBH: Domestic hot water tank booster
heater (Field supply)
SV1:3-way valve (Field supply) 11.2
,
Coil 1 heat exchanger for heat pump
11.3
Coil 2,heat exchanger for Solar energy
Automatic air purge valve 12 Filter (Accessory)
Drainage valve 13 Check valve (Field supply)
Tbt: Buffer
tank upper temperature
sensor (Optional ) 14
Shut-off valve (Field supply)
15
Filling valve (Field supply)
16
Drainage valve (Field supply)
17
Tap water inlet pipe (Field supply)
18
Hot water tap (Field supply)
19
Collector/distributor (Field supply)
20
Bypass valve (Field supply)
AHS Auxiliary heat source (Field supply)
User interface
Buffer tank
(Field supply)
P_o: Outside circulation pump (Field supply)
P_s: Solar pump (Field supply)
Tsolar: Solar temperature sensor (Optional)
Solar panel (Field supply)
P_d: DHW pipe pump (Field supply)
T5: Domestic water tank temperature
sensor (Accessory)
FHL
1...n Floor heating loop (Field supply)
T1:Total water flow temperature sensor
(Optional)
0
Code
1
2
3
4.1
4.2
4.3
4
5
6
6.1
6.2
7
8
9
1 Expansion vessel (Field supply)
13

The highest outlet water temperature may reach 70°C, please beware of burn.
CAUTION
The ON/OFF signal and operation mode and temperature setting are set on the user interface. P_o keeps
running as long as the unit is ON for space heating, SV1 keeps OFF.
Domestic water heating
The ON/OFF signal and target tank water temperature (T5S) are set on the user interface. P_o stops
running as long as the unit is ON for domestic water heating, SV1 keeps ON.
AHS (auxiliary heat source) control
The AHS function is set on the user interface.(AHS function can be set valid or invalid in “OTHER HEATING
SOURCE” of "FOR SERVICEMAN".)
1) When the AHS is set to be valid only for heating mode, AHS can be turned on in the following ways:
a. Turn on the AHS via BACKHEATER function on the user interface;
b. AHS will be turned on automatically if initial water temperature is too low or target water temperature is too
high at low ambient temperature.
P_o keeps running as long as the AHS is ON, SV1 keeps OFF.
2) When the AHS is set to be valid for heating mode and DHW mode. In heating mode, AHS control is same as
part 1); In DHW mode, AHS will be turned on automatically when the initial domestic water temperature T5 is
too low or the target domestic water temperature is too high at low ambient temperature. P_o stops running,
SV1 keeps ON.
3) When the AHS is set valid, M1M2 can be set to be valid on the user interface. In heating mode, AHS will
be turned on if MIM2 dry contact closes. This function is invalid in DHW mode.
TBH (tank booster heater) control
The TBH function is set on the user interface. (TBH function can be set valid or invalid in “OTHER HEATING SOURCE”
of "FOR SERVICEMAN".)
1）When the TBH is set to be valid, TBH can be turned on via TANKHEATER function on the user interface; In
DHW mode, TBH will be turned on automatically when the initial domestic water temperature T5 is too low or
the target domestic water temperature is too high at low ambient temperature.
2）When the TBH is set to be valid, M1M2 can be set to be valid on the user interface. TBH will be turned on if
MIM2 dry contact closes.
Solar energy control
Hydraulic module recognizes solar energy signal by judging Tsolar or receiving SL1SL2 signal from user
interface. The recognition method can be set via SOLAR INPUT on the user interface.
1)When Tsolar is set to be valid, Solar energy turns ON when Tsolar is high enough, P_s starts running;
Solar energy turns OFF when Tsolar is low, P_s stops running.
2)When SL1SL2 control is set to be valid, Solar energy turns ON after receiving Solar kit signal from user
interface, P_s starts running; Without solar kit signal. Solar energy turns OFF, P_s stops running.
NOTE
Make sure to install the (SV1) 3-way valve correctly. For more details, please refer to 9.6.6 "Connection for other
components.
At extremely low ambient temperature, the domestic hot water is exclusively heated by TBH, which assures that heat
pump can be used for space heating with full capacity.
Details on domestic hot water tank configuration for low outdoor temperatures (T4DHWMIN) can be found in "DHW MODE
SETTING" of "FOR SERVICEMAN".
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Space heating

8.2 Application 2
ROOM THERMOSTAT control for space heating or cooling need to be set on the user interface. It can be set
in three ways: MODE SET/ONE ZONE/DOUBLE ZONE. The unit can be connected to a low voltage room
thermostat.
The circulation pump operation
5
4
4.2
4.1
10
FHL1 FHL2 FHLn
19
8.2.1 One zone control
Outdoor
1
RT
Code
Assembly unit Code Assembly unit
1
Main unit
Shut-off valve (Field supply)
15
Filling valve (Field supply)
2
User interface
Drainage valve (Field supply)
4
Buffer tank (Field supply)
19
Collector/distributor (Field supply)
4.1
Automatic air purge valve
4.2
Drainage valve
5
P_o: Outside circulation pump (Field
supply) RT
Low voltage roomthermostat (Field supply)
10 Expansion vessel (Field supply)
FHL 1...n Floor heating loop (Field supply)
12
Modbus
15
16
14
12
14
2
16
15
Space heating
One zone control: the unit ON/OFF is controlled by the room thermostat, operation mode and outlet water
temperature are set on the user interface. System is ON when “HT” of the thermostat keep closing for 15s. When
“HT” keep opening for 15s, system turns OFF.
14
16
When the system is ON, which means “HT” of the thermostat close, P_o starts running; When the system is OFF,
which means “HT” open, P_o stops running.
Filter(Accessory)