mundoclima H12 Series Operating instructions

www.mundoclima.com
CHILLER INVERTER H12
Installation & Owner's manual
and information requirements
MUENR-H12T / MUENR-H12T(K)
CL25652 to CL25659
English

ACCESSORIES
1 INTRODUCTION
1.1
CONTENTS
use conditions of the unit
2 SAFETY CONSIDERATION
3 BEFORE INSTALLATION
3.1 Handling of the unit
4 IMPORTANT INFORMATION ON REFRIGERANT
5 SELECTION OF INSTALLATION SITE
6 PRECAUTIONS ON INSTALLATION
6.1
6.2
6.3
6.4
6.5
Outline dimensional drawing
Requirements of arrangement space of the unit
Installation foundation
Installation of damping devices
Installation of device to prevent snow build-up and strong breeze
7 CONNECTION DRAWING OF PIPELINE SYSTEM
8 OVERVIEW OF THE UNIT
8.1
8.2
8.3
8.4
8.5
Main parts of the uint
Opening the uint
Outdoor unit PCBs
Electric wiring
Water system installation
9 STRAT-UP AND CONFIGRUATION
10
TEST RUN AND FINAL CHECK
10.1
10.2
Check item table after installation
Trial run
01
01
02
04
05
05
06
08
09
09
10
11
12
13
15
20
30
34
35
35

11 MAINTENANCE AND UPKEEP
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
11.10
11.11
11.12
11.13
Failure information and code
Data display of wired controller
Care and maintenance
Removing scale
Winter shutdown
Replacing parts
First startup after shutdown
Refrigeration system
Disassembling compressor
Auxiliary electric heater
System antifreezing
Replacement of safety valve
Information servicing
RECORD TABLE OF TEST RUN AND MAINTENANCE
RECORD TABLE OF ROUTINE RUNNING
12 APPLICABLE MODELS AND MAIN PARAMETERS
13 INFORMATION REQUIREMENTS
36
38
38
38
38
38
39
39
39
39
39
40
41
44
44
45
47

MUENR-75-H12T / MUENR-75-H12T(K)
MUENR-140-H12T / MUENR-140-H12T(K)
MUENR-75-H12T / MUENR-75-H12T(K)
MUENR-140-H12T / MUENR-140-H12T(K)
MUENR-90-H12T / MUENR-90-H12T(K)
MUENR-180-H12T / MUENR-180-H12T(K)
MUENR-90-H12T / MUENR-90-H12T(K)
MUENR-180-H12T / MUENR-180-H12T(K)
ACCESSORIES
1 INTRODUCTION
1.1 Use conditions of the unit
1) The standard voltage of power supply is 380-415V 3N~50Hz, the minimum allowable voltage is 342V, and the maximum
voltage is 456V.
2) To maintain better performance, please operate the unit under the following outdoor temperature:
outdoor temperature (℃)
COOLINGG
Outlet water temperature (℃)
Fig. 1-1-1 Cooling operating range
outdoor temperature (℃)
HEATING
outdoor temperature (℃)
COOLINGG
0 5 10 15 20 25 30
Outlet water temperature (℃)
outdoor temperature (℃)
HEATING
20 25 30 35 40 45 50 55 60
Outlet water temperature (℃)
Fig. 1-2-1 Cooling operating range Fig. 1-2-2 Heating operating range
Low leaving water temperature mode can be set by wired controller, please refer to the Operation Manual(select “LOW OUT-
LETWATER CONTROL” under “SERVICE MENU” page) for details. If low leaving water temperature function is e󰀨ective, the
operation range will extend to the shadow area. When the setting water temperature is less than 5℃, antifreeze liquid (concen-
tration above 15%) should be added in the water system, otherwise the unit and the water system will be damaged.
01
Unit Installation & Operation Manual
Temperature testing
components of
totalwater outlet
Adapter Installation manual of
wired controller
Quantity 1 1 1 1
Shape
Purpose / Use for installation (only need for setting the main module)

2. SAFETY CONSIDERATION
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.
i INFORMATION
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, re or other
damage to the equipment. Be sure to only use accessories made by the supplier, which are specically designed for
the equipment and make sure to get installation done by professional installers.
All the activities described in this manual must be carried out by a licensed technician. Be sure to wear adequate
personal protection equipments such as gloves and safety glasses while installing the unit or carrying out mainte-
nance activities.
Contact your dealer for any further assistance.
DANGER
Indicates an imminently hazardous situation which if not avoided, will result in death or serious injury.
WARNING
Indicates a potentially hazardous situation which if not avoided, could result in death or serious injury.
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.
NOTE
Indicates situations that could only result in accidental equipment or property damage.
Explanation of symbols displayed on the indoor unit or outdoor unit
DANGER
Before touching electric terminal parts, turn o󰀨 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, leave the piping drip to room temperature or be sure to wear protective gloves.
Do not touch any switch with wet ngers. Touching a switch with wet ngers can cause electrical shock.
Before touching electrical parts, turn o󰀨 all applicable power to the unit.
02
WARNING This symbol shows that this appliance used a ammable refrigerant. If the refrigerant
isleaked and exposed to an external ignition source, there is a risk of re.
CAUTION This symbol shows that the operation manual should be read carefully.
CAUTION This symbol shows that a service personnel should be handling this equipment
withreference to the installation manual.
CAUTION This symbol shows that a service personnel should be handling this equipment
withreference to the installation manual.
CAUTION This symbol shows that information is available such as the operating manual orinstallation
manual.

WARNING
• 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 ammable refrigerants.
• Tear apart and throw away plastic packaging bags so that children will not play with them.Children that playing
with plastic bags face danger of death by su󰀨ocation.
• Safely dispose of packing materials such as nails and other metal or wood parts that could cause injuries.
• Ask your dealer or qualied 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 re
• Be sure to use only specied accessories and parts for installation work. Failure to use specied parts may result
in water leakage, electric shocks, re, or collapse from its mount.
• Install the unit on a foundation that can withstand its weight. Insu󰀩cient physical strength may cause the
equipment to fall and possible injury.
• Perform specied installation work with full consideration of strong wind, hurricanes, or earthquakes. Improper
installation work may result in accidents due to equipment falling.
• Make sure that all electrical work is carried out by qualied ersonnel according to the local laws and regulations
and the manual switch should be installed individual circuit separate circuit. Insu󰀩cient capacity of the power
supply circuit or improper electrical construction may lead to electric shocks or re.
• 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 re.
• Make sure all wiring is secure. Use the specied wires and ensure that terminal connections or wires are
protected from water and other adverse external forces. Incomplete connection or a󰀩xing may cause a re.
• When wiring the power supply, tidy 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 re.
• After completing the installation work, 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 or soon after operation as the refrigerant pipes may be hot or cold,. Burns or frostbite are possible if you
touch the refrigerant pipes. To avoid injury, leave the pipes return to normal temperature or, wear protective
gloves if you have to touch the piping.
• Do not touch the internal parts (pump, backup heater, etc.) during or soon after operation. Touching the internal
parts can cause burns. To avoid injury, leave the internal parts return to normal temperature or, wear protective
gloves if you have to touch the piping.
• Do not accelerate the defrosting process or clean manually, unless those
recommended by the manufacturer.
• The appliance shall be stored in a room without continuously operating ignition
sources (for example: open ames, an operating gas appliance or an operation
electric heater.)
• Do not pierce or burn the unit.
• Be aware that refrigerants may not contain an odour.
CAUTION
• 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 e󰀨ective grounds.
- Lightning conductors or telephone ground wires：Electrical threshold may rise abnormally if struck by a
lightning bolt.
• Install the power wire at least 3.3 feet (1 meter) away from televisions or radios to prevent interference or noise.
(Depending on the radio waves, a distance of 3.3 feet (1 meter) may not be su󰀩cient to eliminate the noise.)
• Do not wash the unit by water. This may cause electric shocks or re. The appliance must be installed in accor-
dance with national wiring regulations. If the supply cord is damaged, it must be replaced.
03
Caution:Risk of re/
ammable materials

• 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 possible 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 leakage.
- Where there is machinery which emits electromagnetic waves. Electromagnetic waves can disturb the control
system and cause equipment malfunction.
- Where ammable gases may leak, where carbon ber or ignitable dust is suspended in the air or where
volatile ammables such as paint thinner or gasoline are handled. These types of gases might cause a re.
- Where the air contains high levels of salt such as near the seaside.
- Where voltage uctuates a lot, such as in factories.
- In vehicles or vessels.
- Where acidic or alkaline vapors are present.
• Children should not play with the unit. Cleaning and user maintenance should not be done by children without
supervision.
• This appliance is intended to be operated by expert or trained users in shops, in light industry and on farms, or
for commercial use by lay persons
• If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or a similarly qualied
person in order to avoid a hazard.
• 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 landlls 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 xed wiring
according to the national rule.
• Conrm the safety of the installation area ( walls, oors, etc. ) without hidden dangers such as water, electricity,
and gas before the wiring and piping works.
• 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 rectied.
• When installing multiple units in a centralized manner, please conrm 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 xed rmly, Take reinforcement measures, if necessary.
NOTE
About Fluorinated Gasses
- This air-conditioning unit contains uorinated gasses. For specic 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 certied technician.
- Product uninstallation and recycling must be performed by a certied 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.
3 BEFORE INSTALLATION
3.1 Handling of the unit
The angle of inclination should not be more than 15º when carrying the unit in case of overturn of the unit.
1) Rolling handling: several rolling rods of the same size are placed under the base of the unit, and the length of each rod must
be more than the outer frame of the base and suitable for balancing of the unit.
04

2) Lifting: each lifting rope (belt) should be able to bear 4 times the weight of the unit. Check the lifting hook and ensure that it is rmly
attached to the unit. To avoid damages to the unit, a protective block made of wood , cloth or hard paper should be placed between
the unit and rope when lifting, and its thickness should be 50mm or more. It is strictly forbidden to stand under the machine when it is
hoisted.
Lifted cable
Lifted hook
the angle of inclinaton
4 protective blocks should be placed.
Unilateral distance should be 50mm or
more.
Lifted hook
Fig. 3-1 lifting of the unit
4 IMPORTANT INFORMATION ON REFRIGERANT
This product contains uorinated greenhouse gases covered by the Kyoto Protocol. Do not vent gases into the atmosphere.
Refrigerant type:
GWP value: 675
R32
GWP : global warming potential
The refrigerant volume is indicated on the unit nameplate
Add the refrigerant
Amount of factory-charged refrigerant and tonnes CO2Equivalent is
Table 4-1
Model
MUENR-75-H12T / MUENR-75-H12T(K)
MUENR-90-H12T / MUENR-90-H12T(K)
MUENR-140-H12T / MUENR-140-H12T(K)
MUENR-180-H12T / MUENR-180-H12T(K)
Refrigerant(kg)
9
16
15.5
32.0
Tonnes CO2equivalent
6.08
10.80
10.46
21.60
MC-SU30-RN8L
MC-SU60-RN8L
5 SELECTION OF INSTALLATION SITE
1) Units can be installed on the ground or proper place on a roof, provided that su󰀩cient ventilation can be guaranteed.
2) Do not install the unit in a scenario with requirements on noise and vibration.
3) When installing the unit, take measures to avoid exposure to direct sunlight, and keep the unit away from boiler pipeline and
surroundings which might corrode the condenser coil and copper pipes.
4) If the unit can be achieved by unauthorized personnel, take protective measures for safety considerations, such as installing
a fence. These measures can prevent man-caused or accidental injuries, and can also prevent the electrical parts in
operation from being exposed when the main control box is opened.
5) Install the unit on a foundation at least 200 mm high above the ground, where the oor drain is needed, to ensure that no
water accumulate.
6) If installing the unit on the ground, put the steel base of the unit on the concrete foundation, which must be as deep as into
the solid soil layer. Ensure the installation foundation is separated from buildings, as the noises and vibration of the unit may
adversely a󰀨ect the latter. By means of the installation holes on the unit base, the unit can be fastened on the foundation
reliability.
7) If the unit is installed on a roof, the roof must be strong enough to bear the weight of the unit and the weight of maintenance
personnel. The unit can be placed on the concrete and groove-shaped steel frame, similar to the case when the unit is
installed on the ground. The weight-bearing groove-shaped steel must match the installation holes of the shock absorber and
is wide enough to accommodate the shock absorber.
8) For other special requirements for installation, please consult the building contractor, architectural designer or other
professionals.
NOTE
The selected installation site of the unit should facilitate connection of water pipes and wires, and be free from water
inlet of oil fume, steam or other heat sources. Besides, the noise of the unit and cdischarge air should not inuence the
surrounding environment.
05

6 PRECAUTIONS ON INSTALLATION
6.1 Outline dimensional drawing
Front view Left view
Top view
Fig. 6-1 Outline dimensional
06

Table 6-1
Model
A
B
C
D
E
F
Front view Left view
Top view
Fig. 6-2 Outline dimensional of MUENR-180-H12T / MUENR-180-H12T(K)
MUENR-75-H12T
MUENR-75-H12T(K)
2000
960
1770
816
190
270
MUENR-90-H12T
MUENR-90-H12T(K)
2220
1135
2315
910
255
270
NOTE
After installing the spring damper, the total height of the unit will increase by 135mm approximately.
270 / 380 (K)
MUENR-180-H12T
MUENR-140-H12T(K)
2752
2220
2413
836
356
07
270
MUENR-140-H12T
MUENR-140-H12T(K)
2220
1135
2300
910
185

6.2 Requirements of arrangement space of the unit
1) To ensure adequate airow entering the condenser, the inuence of descending airow caused by the high-rise buildings
around upon the unit should be taken into account when installing the unit.
2) If the unit is installed where the owing speed of air is high, such as on the exposed roof, the measures including sunk fence
and Persian blinds can be taken, to prevent the turbulent ow from disturbing the air entering the unit. If the unit needs to be
provided with sunk fence, the height of the latter should not be more than that of the former; if Persian blinds are required, the
total loss of static pressure should be less than the static pressure outside the fan. The space between the unit and sunk fence
or Persian blinds should also meet the requirement
3) If the unit needs to operate in winter, and the installation site may be covered by snow, the unit should be located higher than
the snow surface, to ensure that air ows through the coils smoothy.
A
Table 6-2
A
B
C
D
BC
Main unit
F
A
F
Input of airow
D
Input of airow
Input of airow
Fig. 6-3 single unit installstion
Input of airow
Main unit
Main unit
Main unit
≥1500
≥1500
≥1500
≥1500
E
E
E
B
Main unit
Main unit
Main unit
C
E
E
E
Input of airow
Fig. 6-4 multiple units installstion
Installation space (mm)
E
F
G
/
WARNING
When the number of units installed in the same place is greater than 40 units, please contact professionals to conrm
the installation method.
G
Main unit
Main unit
Main unit
Main unit
FF
D
≥800
≥1100
≥3000
/
Input of airow
08

6.3 Installation foundation
6.3.1 Base structure
Outdoor unit base structure design should take account of the
following considerations:
1) A solid base prevents excess vibration and noise. Outdoor unit
bases should be constructed on solid ground or on structures of
su󰀩cient strength to support the units’ weight.
2) Bases should be at least 200mm high to provide su󰀩cient
access for installation of piping.Snow protection should also be
considered for the base height.
3) Either steel or concrete bases may be suitable.
4) A typical concrete base design is shown in Fig. 6-5. A typical
concrete specication is 1 part cement, 2 parts sand and 4 parts
crushed stone with steel reinforcing bar. The edges of the base
should be chamfered .
5) To ensure that all contact points are equally secure, bases should
be completely level. Base design should ensure that the points
on the units’ bases designed for weight-bearing support are fully
supported.
Rubber anti-vibration pads
Solid ground / surface
≥80mm
Outdoor unit
Concrete base
h≥200mm
≥200mm
Fig.6-5 Front view of base structure
6.3.2 Location drawing of installation foundation
of the unit: (unit: mm)
1) If the unit is located so high that it is inconvenient for
maintenance personnel to conduct maintenance, the suitable
sca󰀨old can be provided around the unit.
2) The sca󰀨old must be able to bear the weight of maintenance
personnel and maintenance facilities.
3) The bottom frame of the unit is not allowed to be embedded
into the concrete of installation foundation.
4) A drainage ditch should be provided to allow drainage of
condensate that may form on the heat exchangers when
the units are running in heating mode. The drainage should
ensure that condensate is directed away from roadways and
footpaths, especially in locations where the climate is such
that condensate may freeze. (unit: mm)
Inlet and outlet
pipe side
Drainage channel
Fig. 6-6
1991
1550
Anchor bolt
220
862
Electric control
box side
Top view of schematic diagram of installation
dimension of MUENR-75-H12T / MUENR-75-H12T(K)
09
Inlet and outlet
pipe side
Drainage channel
Fig. 6-7
Inlet and outlet
pipe side
Drainage channel
Fig. 6-8
2200
1460
Anchor bolt
370
1017
(unit: mm)
Electric control
box side
6.4 Installation of damping devices
6.4.1 Damping devices must be provided
between the unit and its foundation.
By means of the Φ15mm diameter installation holes on
the steel frame of the unit base, the unit can be fastened
on the foundation through the spring damper. See Fig.6-
6,6-7 (Schematic diagram of installation dimension of the
unit) for details about center distance of the installation
holes. The damper does not go with the unit, and the user
can select the damper according to the relevant require-
ments. When the unit is installed on the high roof or the
area sensitive to vibration, please consult the relevant
persons before selecting the damper.
6.4.2 Installation steps of the damper
Step 1. Make sure that the atness of the concrete
foundation is within ±3mm, and then place the unit on the
cushion block.
Step 2. Raise the unit to the height suitable for installation
of the damping device.
Step 3. Remove the clamp nuts of the damper. Place the
unit on the damper, and align the xing bolt holes of the
damper with the xing holes on the unit base.
Step 4. Return the clamp nuts of the damper to the xing
holes on the unit base, and tighten them into the damper.
Step 5. Adjust the operational height of the damper base,
and screw down the leveling bolts. Tighten the bolts by
one circle to ensure equal height adjustment variance of
the damper.
Step 6. The lock bolts can be tightened after the correct
operational height is reached.
Top view of schematic diagram of installation
dimension of MUENR-90-H12T / MUENR-90-H12T(K)
& MUENR-140-H12T / MUENR-140-H12T(K)
2120
Electric control
box side
Anchor bolt
974 2752
Top view of schematic diagram of installation
dimension of MUENR-180-H12T /
MUENR-180-H12T(K)
403
972
(unit: mm)

Anchor bolt
Nut
Ferrol
Damping device
6.5.1 Measures used to prevent problems
caused by snow
1) Measures to prevent build-up of snow
The base height should be as least the same as the predicted
snow depth in the local area.
Outdoor
unit
Base height
Fig. 6-11 Snow prevention base height
2) Lightning protection and snow protection measures
Check the installation site thoroughly; do not install the equip-
ment under awnings or trees or a place where snow is piled up.
6.5.2 Precautions for designing a snow cover
1) To ensure a su󰀩cient air ow required by the air-cooled heat
pump chiller, design a protective cover to make the dust re-
sistance 1 mm H2O or less lower than the allowable external
static pressure of air-cooled heat pump chiller.
2) The protective cover must be strong enough to withstand the
snow weight and the pressure caused by strong wind and
typhoon.
3) The protective cover must not cause short circuit of air dis-
charge and suction.
10
Fig. 6-9 Installation of the damper
6.5 Installation of device to prevent snow
build-up and strong breeze
When installing an air-cooled heat pump chiller in a place with heavy
snow, it is necessary to take snow protection measures to ensure trou-
ble-free operation of the equipment.
Otherwise, accumulated snow will block the air ow and may cause
equipment problems.
(a) Buried in the snow
(b) Snow accumulated on the top plate
c) Snow falling on the equipment
(
(d) Air inlet blocked by snow
wind with snow
(e) Equipment covered with snow
Fig. 6-10 Types of problems caused by snow

This is the water system of MUENR-75-H12T(K), MUENR-90-H12T(K), MUENR-140-H12T(K) and MUENR-180-H12(K):
Water charge valve
Two-way valve
Three-way valve
Plate heat
exchanger
Drain valve
Auxiliary electric heater
Drain valve
Drain valve
0.15MPa<Water
replenishing pres<0.6MPa
Di󰀨erential pressure
by-pass valve
Terminal
Symbol explanation
Stop valve
Y-shaped lter
Expansion vessel
Pressure gauge
Thermometer
Safety valve
Water ow switch
Circulating pump
Flexible joint
Gate valve
Check valve
Di󰀨erential pressure
by-pass valve
Automatic discharge valve
7 CONNECTION DRAWING OF PIPELINE SYSTEM
This is the water system of MUENR-75-H12T, MUENR-90-H12T, MUENR-140-H12T and MUENR-180-H12:
unit
unit
unit
Expansion tank
Water replenishing
Y-type lter,
requiring≥ 40 meshes
Auxiliary electric heater
Symbol explanation
Stop valve Pressure gauge Flexible joint Gate valve Automatic discharge valve
Y-shaped lter Thermometer Circulating pump Check valve
Drain valve
Dirt discharge valve
Two-way valve
Terminal
Three-way valve
Fig.7-1 Connection drawing of pipeline system
11
Fig.7-2 Connection drawing of pipeline system

Fig. 8-1 Main parts of MUENR-75-H12T / MUENR-75-H12T(K)
(Picture just use to show the key component relative position)
4
Fig. 8-2 Main parts of MUENR-90-H12T / MUENR-90-H12T(K)
(Picture just use to show the key component relative position)
Fig. 8-3 Main parts of MUENR-140-H12T / MUENR-140-H12T(K)
(Picture just use to show the key component relative position)
MODEL B MODEL B MODEL A
Fig. 8-4 Main parts of MUENR-180-H12T / MUENR-180-H12T (K)
(Picture just use to show the key component relative position)
12
NOTE
The ratio of the two - way valves on the terminal shall not exceed 50 percent.
8 OVERVIEW OF THE UNIT
8.1 Main parts of the uint Table 8-1
NO.
1
2
3
4
5
6
7
NAME
Air outlet
Top cover
Electric control box
Compressor
Plate heat exchanger
Condenser
Water intlet
NO.
8
9
10
11
12
NAME
Air inlet
Water outlet
wire controller (It can be placed indoors)
Expansion tank (only version K)
Gas-liquid separator (only version K)
13 Induction pump (only version K)

8.2 Opening the uint
Cover1 Cover 2 Cover 3 Cover 6 Cover 5 Cover 4
Fig. 8-6 Doors of MUENR-75-H12T / MUENR-75-H12T(K)
Cover 1/2/3 give access to the compartment of water pipes and water side heat exchanger.
Cover 4 give access to the electrical parts.
Cover 5/6 give access to the hydraulic compartment.
Cover 1 Cover 2 Cover 3 Cover 6 Cover 5 Cover 4
Cover 1/2/3 give access to the compartment of water pipes and water side heat exchanger.
Cover 4 give access to the electrical parts.
Cover 5/6 give access to the hydraulic compartment.
13
Fig. 8-7 Doors of MUENR-90-H12T / MUENR-90-H12T(K) & MUENR-140-H12T /MUENR-140-H12T(K)

Door 6 Door 7 Door 8 Door 9 Door 10Door 1 Door 2 Door 3 Door 4 Door 5
Fig. 8-8 Doors of MUENR-180-H12T / MUENR-180-H12T(K)
Door 1/2/3/9/10 give access to the compartment of water pipes and water side heat exchanger.
Door 4/5 give access to the hydraulic compartment.
Door 6/7/8 give access to the electrical parts.
14

CN32：Main board power supply.
CN99:slave board power supply.
CN68:Pump(220-240V control power supply )
1）After receiving start-up instruction, the pump will be started up instantly, and will maintain start-up state
always in the process of operation.
2）In case of refrigerating or heating shutdown, the pump will be shut down 2 minutes after all modules stop
operating.
3）In case of shutdown under the pump mode, the pump can be directly shut down.
CN74/CN67:CCH,Crankcase heater
CN75/CN66:EVA-HEAT,Electric of water side heat exchanger heaters connection
CN48:ST1,Four-way valve
CN47:SV6,Liquid bypass solenoid valve
CN49:SV5,Multi-function solenoid valve
CN84:SV8A,Injection solenoid valve of compressor system A
CN83:SV8B,Injection solenoid valve of compressor system B
CN93：The alarm signal output of the unit(ON/OFF signal)
Attention: the control port value of the alarm actually detected is ON/OFF but not 220-240V control power supply，-
so special attention should be paid when installing the alarm signal output.
8.3 Outdoor unit PCBs
8.3.1 MAIN PCB
1) Label descriptions are given in Table 8-2
31
32
30
29
28
26
27
24
25
22
23
21
19
20
18
16
17
15
Table 8-2
NO.
1
2
3
4
5
6
7
8
9
10
11
14
37
1312
2
4
6
8
9
11
1
3
5
7
10
Detail information
15
38 3933 34 35 36
Fig. 8-9 Main board of MUENR-75-H12T / MUENR-75-H12T( K)
and MUENR-140-H12T / MUENR-140-H12T(K)

NO.
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
Detail information
CN65:Program burn in port(USB).
CN28:Three-phase protector output switch.(Protection code E8)
CN22:Outdoor units communication and wired controller conmunication port
CN46:The power supply port of the wired controller (DC12V)
CN26: Compressor inverter module and Fan inverter module communication ports
CN300:Program burn in port(WizPro200RS programming device).
CN33:Conmunicate with slave board
CN41:System low pressure sensor
CN40:System high pressure sensor
CN45:Taf2:Water side antifreeze temperature sensor
CN37:T3A:pipe temperature sensor of the condenser
CN30:T4: outdoor ambient temperature sensor
CN16:T3B:pipe temperature sensor of the condenser
CN38:Tp2:DC inverter compressor B discharge temperature sensor
CN27:TP-PRO,Discharge temperature switch protection (protection code P0,provent the compressor from
over temperature 115℃)
CN42:Low pressure protection switch.(Protection code P1)
CN16:
T6A:Refrigerant inlet temperature of EVI plate heat exchanger
T6B:Refrigerant outlet temperature of EVI plate heat exchanger
CN4:Temperature sensors input port
Twi:Unit water inlet temperature sensor
Th:System suction temperature sensor
Two:Unit water outlet temperature sensor
Tz/7:coil nal outlet temperature sensor
Tp1:DC inverter compressor A discharge temperature sensor
CN72:EXVC,EVI electronic expansion valve.Used for EVI.
CN70:EXVA,System electronic expansion valve1.
CN71:EXVB,System electronic expansion valve2.Used for cooling.
SW3:Up button
a) Select di󰀨erent menus when enter menu selection
b) For sopt inspection in conditions.
SW4:Down button
a) Select di󰀨erent menus when enter menu selection.
b) For sopt inspection in conditions
SW5:Menu button
Press to enter menu selection, short press to return to the previous menu.
SW6:OK button
Enter the submenu or conrm the function selected by short pressing.
Digital tube
1) In case of stand-by, the address of the module is displayed;
2) In case of normal operation, 10. is displayed (10 is followed by dot).
3) In case of fault or protection, fault code or protection code is displayed.
ENC1:NET_ADDRESS
DIP switch 0-F of outdoor unit network address is enabled, which represent address 0-15.
S1:Dip switch
S1-1:Normal control, valid for S1-1 OFF(factory default).
Remote control, valid for S1-1 ON.
S1-3:Single water pump controll, valid for S1-3 OFF (factory default)
Multiple water pumps controll, valid for S1-3 ON.
S2:Dip switch(reserve)
S3:Dip switch
S3-1:Valid for S3-1 ON (factory default).
S4:POWER
DIP switch for capacity selection. (MUENR-75-H12T / MUENR-75-H12T(K) defaults 0011, MUENR-140-H12T /
MUENR-140-H12T(K) defaults 0111)
16

13
12
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
11
10
9
14 15
8 7 6 5 4 3
Fig. 8-10 Slave board of MUENR-75-H12T / MUENR-75-H12T(K) and MUENR-140-H12T / MUENR-140-H12T(K)
Detail information
CN140:Power supply,220-240VAC input
CN115:W-HEAT,Electric heater of water ow switch
CN125:Three-way valve(hot-water valve,reserve)
1
2
CN123:Pump(220-240V control power supply )
1）After receiving start-up instruction, the pump will be started up instantly, and will maintain start-up state always
in the process of operation.
2）In case of refrigerating or heating shutdown, the pump will be shut down 2 minutes after all modules stop
operating.
3）In case of shutdown under the pump mode, the pump can be directly shut down.
CN121:COMP-STATE,connect with an ac light to indicate the state of the compressor
Attention: the control port value of the COMP-STATE actually detected is ON/OFF but not 220-240V control power
supply，so special attention should be paid when installing the light.
CN119:
HEAT1.Pipeline Auxiliary Heater
Attention: the control port value of the HEAT1 actually detected is ON/OFF but not 220-240V control power supply
so special attention should be paid when installing the pipeline auxiliary heater.
CN108:Inverter pump 0-10V output control singnal
CN110:W.P-SW,Water pressure switching port.
TEMP-SW,Target water temperature switching port.
CN138:COOL/HEAT,Remote function of cool/heat signal
ON/OFF,Remote function of on/o󰀨 signal
CN114:Water ow switch signal
CN105:Taf1:Water side antifreeze temperature(reserve)
CN101:Tw:Total water outlet temperature sensor when several units are connected in parallel
CN103:T5:Water tank temperature sensor (reserve)
CN300:Program burn in port(WizPro200RS programming device).
CN109:Conmunicate with main board
Faults
When the main unit su󰀨ers faults, the main unit stops operating, and all other units also stop running;
When the subordinate unit su󰀨ers faults, only the unit stops operating, and other units are not a󰀨ected.
Protection
When the main unit is under protection, only the unit stops operating, and other units keep running;
When the subordinate unit is under protection, only the unit stops operating, and other units are not a󰀨ected.
CAUTION
17