LG Hydro Kit ARNH30GK1A4 User manual

INSTALLATION MANUAL
AIR
CONDITIONER
www.lg.com
Please read this installation manual completely before installing the
product. Installation work must be performed in accordance with the
national wiring standards by authorized personnel only.
Please retain this installation manual for future reference after reading
it thoroughly.
Copyright © 2020 LG Electronics Inc. All Rights Reserved.
MFL67086714
Rev.00_072120
Hydro Kit Wall mounted (medium temperature)
Original instruction (R32)
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH
ΕΛΛΗΝΙΚΆ
ČEŠTINA
NEDERLANDS
POLSKI
LIMBA ROMÂNĂ

TABLE OF CONTENTS
2
ENGLISH
4SAFETY INSTRUCTIONS
12 INSTALLATION PART
13 GENERAL INFORMATION
13 Model Information
13 Accessories
16 INSTALLATION
16 Transporting the Unit
16 Selection of the best location
20 INSTALLATION OF INDOOR UNIT
20 Conditions where Indoor Unit is Installed
23 PIPING AND WIRING FOR INDOOR UNIT
23 Water Piping and Water Circuit Connection
26 Water pump Capacity
26 Pressure Drop
28 Typical Installation Example
31 Water cycle (For R32)
33 Water Quality
33 Frost protection
34 Preparation for Piping
35 Electrical Wiring
36 Wiring Connection
39 Connecting Cables
40 ACCESSORIES INSTALLATION
40 Before Installation
40 Thermostat
44 DHW Tank
47 DHW Tank Kit
49 Solar Thermal Kit
50 Dry Contact
52 External Controller - Setting up programmable digital input operation
53 Remote Temperature Sensor
55 Solar pump
56 Wi-fi Modem
57 2Way Valve
58 3Way Valve(A)
59 3Way Valve(B)
60 Final check
61 SYSTEM SET-UP
61 DIP Switch Setting
TABLE OF CONTENTS

3
TABLE OF CONTENTS
ENGLISH
66 SERVICE SETTING
66 How to enter service setting
66 Service setting
67 Service contact
68 Model information
69 RMC version lnformation
70 Open source license
71 Installer setting
73 3 Minutes Delay
74 Select Temperature Sensor
75 Dry Contact Mode
76 Pump test run
77 Air cooling set temp.
78 Water cooling set temp.
79 Air heating set temp.
80 Water heating set temp.
81 DHW set temp.
82 Water supply off temp. during cooling
84 Heater priority
85 DHW time setting
86 TH on/off Variable, heating air
87 TH on/off Variable, heating water
88 TH on/off Variable, cooling air
89 TH on/off Variable, cooling water
90 Heating temp. setting
91 Cooling temp. setting
92 Pump setting in heating
93 Pump setting. in cooling
94 Forced operation
95 CN_CC
96 Pump frequency setting (RPM)
97 Pump Capacity
98 CN_EXT
99 Anti-freezing Temperature
100 Pump Prerun/Overrun
101 Solar Thermal System
103 Current flow rate
104 Data logging
105 Password Initialization
106 Troubleshooting

4
SAFETY INSTRUCTIONS
ENGLISH
WARNING
Installation
• Compliance with national gas regulations shall be observed.
• Do not use a defective or underrated circuit breaker. Use this
appliance on a dedicated circuit.
- There is risk of fire or electric shock.
!
Read the precautions in this
manual carefully before
operating the unit.
This appliance is filled with
flammable refrigerant (R32)
This symbol indicates that
the Operation Manual should
be read carefully.
This symbol indicates that a
service personnel should be
handling this equipment with
reference to the Installation
Manual.
SAFETY INSTRUCTIONS
WARNING
This indicates that the failure to follow the instructions can
cause serious injury or death.
CAUTION
This indicates that the failure to follow the instructions can
cause the minor injury or damage to the product.
This symbol is displayed to indicate matters and
operations that can cause risk. Read the part with this
symbol carefully and follow the instructions in order to
avoid risk.
!
!
!
The following safety guidelines are intended to prevent
unforeseen risks or damage from unsafe or incorrect operation
of the appliance. The guidelines are separated into ‘WARNING’
and ‘CAUTION’ as described below.

5
SAFETY INSTRUCTIONS
ENGLISH
• For electrical work, contact the dealer, seller, a qualified
electrician, or an Authorized Service Center.
- There is risk of fire or electric shock.
• Always ground the unit.
- There is risk of fire or electric shock.
• Install the panel and the cover of control box securely.
- There is risk of fire or electric shock.
• Always install a dedicated circuit and breaker.
- Improper wiring or installation may cause fire or electric
shock.
• Be cautious when unpacking and installing the product.
- Sharp edges could cause injury. Be especially careful of the
case edges and the fins on the condenser and evaporator.
• Use the correctly rated breaker or fuse.
- There is risk of fire or electric.
• Do not modify or extend the power cable.
- There is risk of fire or electric shock.
• Do not install, remove, or reinstall the unit by yourself
(customer).
- There is risk of fire, electric shock, explosion, or injury.
• For antifreeze, always contact the dealer or an authorized
service center.
- Almost the antifreeze is a toxic product.
• For installation, always contact the dealer or an Authorized
Service Center.
- There is risk of fire, electric shock, explosion, or injury.
• Do not install the unit on a defective installation stand.
- It may cause injury, accident, or damage to the unit.
• Do not turn on the breaker or power under condition that front
panel, cabinet, top cover, control box cover are removed or
opened.
- Otherwise, it may cause fire, electric shock, explosion or
death.

SAFETY INSTRUCTIONS
6
ENGLISH
• Be sure the installation area does not deteriorate with age.
- If the base collapses, the unit could fall with it, causing
property damage, unit failure, and personal injury.
• Do not install the unit outdoor.
- It may cause damage to the unit.
• Use a vacuum pump or inert (nitrogen) gas when doing
leakage test or purging air. Do not compress air or oxygen and
do not use flammable gases.
- There is the risk of death, injury, fire or explosion.
• The appliance shall be stored in a well-ventilated area where
the room size corresponds to the room area as specified for
operation. (for R32)
• Ducts connected to an appliance shall not contain an ignition
source. (for R32)
• The appliance shall be stored in a room without continuously
operating ignition sources (for example: open flames, an
operating gas appliance or an operating electric heater.)
• Means for disconnection must be incorporated in the fixed
wiring in accordance with the wiring rules.
• This equipment shall be provided with a supply conductor
complying with the national regulation.
• Have all electric work done by a licensed electrician according
to "Electric Facility Engineering Standard" and "Interior Wire
Regulations" and the instructions given in this manual and
always use a special circuit.
- If the power source capacity is inadequate or electric work is
performed improperly, electric shock or fire may result.
• Always install a dedicated circuit and breaker.
- Improper wiring or installation may cause fire or electric
shock.
• Keep any required ventilation openings clear of obstruction.
• Mechanical connections shall be accessible for maintenance
purposes.

7
SAFETY INSTRUCTIONS
ENGLISH
• To prevent the mixing of different types of refrigerants, be
sure to check the type of refrigerant used in the outdoor unit.
• When mechanical connectors are reused indoors, sealing parts
shall be renewed. (for R32)
• When flared joints are reused indoors, the flare part shall be re-
fabricated. (for R32)
Operation
• Do not let the air conditioner run for a long time when the
humidity is very high and a door or a window is left open.
- Moisture may condense and wet or damage furniture.
• Take care to ensure that power cable could not be pulled out
or damaged during operation.
- There is risk of fire or electric shock.
• Do not place anything on the power cable.
- There is risk of fire or electric shock.
• Do not plug or unplug the power supply plug during operation.
- There is risk of fire or electric shock.
• Do not touch (operate) the unit with wet hands.
- There is risk of fire or electric shock.
• Do not place a heater or other appliances near the power
cable.
- There is risk of fire or electric shock.
• Do not allow water to run into electric parts.
- There is risk of fire, failure of the unit, or electric shock.
• Do not store or use flammable gas or combustibles near the
unit.
- There is risk of fire or failure of unit.
• Do not use the product in a tightly closed space for a long
time.
- Oxygen deficiency could occur.

8
SAFETY INSTRUCTIONS
ENGLISH
• When flammable gas leaks, turn off the gas and open a
window for ventilation before turning the unit on.
- There is risk of explosion or fire.
• If strange sounds, or smell or smoke comes from unit, turn the
breaker off or disconnect the power supply cable.
- There is risk of electric shock or fire.
• Stop operation and close the window in storm or hurricane. If
possible, remove the unit from the window before the
hurricane arrives.
- There is risk of property damage, failure of unit, or electric
shock.
• Do not open the front cover of the unit while operation. (Do
not touch the electrostatic filter, if the unit is so equipped.)
- There is risk of physical injury, electric shock, or unit failure.
• When the unit is soaked (flooded or submerged), contact an
Authorized Service Center.
- There is risk of fire or electric shock.
• Be cautious that water could not enter the product.
- There is risk of fire, electric shock, or product damage.
• Ventilate the unit from time to time when operating it together
with a stove, etc.
- There is risk of fire or electric shock.
• Turn the main power off when cleaning or maintaining the unit.
- There is risk of electric shock.
• Take care to ensure that nobody could step on or fall onto the
unit.
- This could result in personal injury and unit damage.
• For installation, always contact the dealer or an Authorized
Service Center.
- There is risk of fire, electric shock, explosion, or injury.
• If the unit is not used for long time, we strongly recommend
not to switch off the power supply to the unit.
- There is risk of water freezing.

SAFETY INSTRUCTIONS
9
ENGLISH
• Periodic ( more than once/year ) cleaning of the dust or salt
particles stuck on the heat exchanger by using water.
• Do not use means to accelerate the defrosting process or to
clean, other than those recommended by the manufacturer.
• Do not pierce or burn refrigerant cycle part.
• Be aware that refrigerants may not contain an odour.
CAUTION
Installation
• Always check for gas (refrigerant) leakage after installation or
repair of unit.
- Low refrigerant levels may cause failure of unit.
• Keep level even when installing the unit.
- To avoid vibration or water leakage.
• Use two or more people to lift and transport the unit.
- Avoid personal injury.
•
Any person who is involved with working on or breaking into a
refrigerant circuit should hold a current valid certificate from an
industry accredited assessment authority, which authorises
their competence to handle refrigerants safely in accordance
with an industry recognised assessment specification. (for R32)
• The appliance shall be stored so as to prevent mechanical
damage from occurring.
• If anyone other than a licensed Professional installs, repairs, or
alters LG Electronics Air Conditioning Products, the warranty is
voided.
- All costs associated with repair are then the full responsibility
of the owner.
• Do not install the product where it will be exposed to sea wind
(salt spray) directly.
- It may cause corrosion on the product. Corrosion, particularly
on the condenser and evaporator fins, could cause product
malfunction or inefficient operation.
!

10
SAFETY INSTRUCTIONS
ENGLISH
• Refrigerant tubing shall be protected or enclosed to avoid
damage.
• Flexible refrigerant connectors (such as connecting lines
between the indoor and outdoor unit) that may be displaced
during normal operations shall be protected against mechanical
damage.
• The installation of pipe-work shall be kept to a minimum.
• Pipe-work shall be protected from physical damage.
• A brazed, welded, or mechanical connection shall be made
before opening the valves to permit refrigerant to flow
between the refrigerating system parts.
• Dismantling the unit, treatment of the refrigerant oil and
eventual parts should be done in accordance with local and
national standards.
• Do not install the unit in potentially explosive atmospheres.
Operation
• Do not lay on the cooled floor for long time when the unit is in
cooling operation.
- This could harm to your health.
• Do not use the unit for special purposes, such as preserving
foods, works of art, etc.
- There is risk of damage or loss of property.
• Use a soft cloth to clean. Do not use harsh detergents,
solvents, etc.
- There is risk of fire, electric shock, or damage to the plastic
parts of the unit.
• Do not step on or put anything on the unit.
- There is risk of personal injury and failure of unit.
• Use a firm stool or ladder when cleaning or maintaining the
unit.
- Be careful and avoid personal injury.

11
SAFETY INSTRUCTIONS
ENGLISH
• 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. (for R32)
• Do not unplug the power supply plug of Hydro Kit when
stopping Hydro Kit operation. Always turn Hydro Kit off, using
the wired remote controller.
- A plate heat exchanger burst may happen because of
disconnection of communication between Hydro Kit and the
outdoor unit.

12
INSTALLATION PART
ENGLISH
Thank you for choosing LG Electronics Air-to-Water Heat Pump Hydro Kit
Before starting installation, please make it sure that all parts are found inside the product box.
INDOOR UNIT BOX
INSTALLATION PART
Item Image
Indoor unit
Owner's / Installation manual
Shut-off valve
Installation Sheet

13
GENERAL INFORMATION
ENGLISH
GENERAL INFORMATION
With advanced inverter technology, Hydro Kit is suitable for applications like under floor heating,
and hot water generation. By Interfacing to various accessories user can customize the range of
the application.
Model Information
Model name and related information
Accessories
To extend the functionality of Hydro Kit , there are various external auxiliary apparatus called as
"accessories".
They are classified by "accessories" and "3rd party accessories" according to the manufacturer.
Accessories are presented LG Electronics, and 3rd party accessories are presented by related
manufacturers.
Model Name
Built-In Electric
Heater(kW)
Power Source
(Electric Heater)
Power
Source (Unit)
Refrigerant
Indoor Unit
Phase Capacity (kW)
R32 1Ø
5.6
6 (3+3) 220-240 V~
50 Hz
220-240 V~
50 Hz
7.1
9.0

14
GENERAL INFORMATION
ENGLISH
Accessories supported by LG Electronics
Item Purpose Model
DHW Tank Kit To operate with DHW tank PHLTA : 1Ø
PHLTC : 3Ø
Remote Air
Sensor To control by air temperature PQRSTA0
Dry Contact To receive on & off external signal PDRYCB500
Dry Contact For Thermostat PDRYCB300
Solar Thermal Kit To operate with solar heating system PHLLA(Limit temperature : 96 °C)
DHW Tank To generate and store hot water
PHS02060310 : 200 liter, Single Heating Coil,
1Ø 230 V 50 Hz 3 kW Electric Heater
PHS02060320 : 200 liter, Double Heating Coil,
1Ø 230 V 50 Hz 3 kW Electric Heater
PHS03060310 : 300 liter, Single Heating Coil,
1Ø 230 V 50 Hz 3 kW Electric Heater
PHS03060320 : 300 liter, Double Heating Coil,
1Ø 230 V 50 Hz 3 kW Electric Heater
Thermistor for
DHW Tank
To control hot water temperature of
DHW tank PHRSTA0
Drain Pan To prevent drain water drop PHDPB
Central Controller Multiple installed products into one
central control
Wi-Fi Modem To enable remote system operation
from smartphone PWFMDD200
Extension wire To connect remote controller with
Indoor PCB for communication PZCWRC1
Cover Plate To relocate remote controller from
indoor unit PDC-HK10

15
GENERAL INFORMATION
ENGLISH
Accessories supported by 3rd party Companies
Item Purpose Specification
Solar Heating System To generate auxiliary heating energy
for water tank
• Solar collector
• 3way valve(B)
Thermostat To control by air temperature
Heating-Only type (230 V AC)
Cooling/Heating type (230 V AC with
Mode selection switch)
3rd Party Controller To connect external controller using
modbus protocol
3way valve and actuator
(A) : To control water flow for hot
water heating or floor heating / To
control water flow when installing
3rd party boiler
(B) : To control close/open mode of
solar circuit
3 wire, SPDT (Single Pole Double Throw)
type, 230 V AC
2way valve and actuator To control water flow for Fan Coil Unit 2 wire,NO(Normal Open) or NC(Normal
Closed) type, 230 V AC

16
INSTALLATION
ENGLISH
Selection of the best location
CAUTION
!
Be very careful while carrying the unit.
• Do not have only one person carry the unit if it is more than 20 kg (44.1 lbs).
• PP bands are used to pack some products. Do not use them as a mean for transportation
because they are dangerous.
• Tear plastic packaging bag and scrap it so that children cannot play with it. Otherwise
plastic packaging bag may suffocate children to death.
• When carrying the unit, be sure to support it at 6-points. Carrying and lifting the unit with 4-
point support may make it unstable, resulting in a fall.
Select space for installing the unit, which will meet the following conditions:
The place where the unit shall be installed inside.
The place shall easily bear a load exceeding four times of the unit weight.
The place where the unit shall be leveled.
The place shall allow easy water drainage.
The place where the unit shall be connected to the outdoor unit.
The place where the unit is not affected by an electrical noise.
The place where there should not be any heat source or steam near the unit.
INSTALLATION
Transporting the Unit

17
INSTALLATION
ENGLISH
- The appliance shall be installed, operated and stored in a room with a floor area larger than the
minimum area.
- Use the graph of table to determine the minimum area.
Minimum floor area(for R32)
0
100
200
300
400
500
600
Amin (m2)
m (kg)
0 1.224 2 3 4 5 6 7 8
Floor standing
Wall mounted
Ceiling mounted
- m : Total refrigerant amount in the system
- Total refrigerant amount : factory refrigerant charge + additional refrigerant amount
- Amin : minimum area for installation
Floor standing
m (kg) Amin (m2)
< 1.224 -
1.224 12.9
1.4 16.82
1.6 21.97
1.8 27.80
2 34.32
2.2 41.53
2.4 49.42
2.6 58.00
2.8 67.27
3 77.22
3.2 87.86
3.4 99.19
3.6 111.20
3.8 123.90
4 137.29
4.2 151.36
4.4 166.12
Floor standing
m (kg) Amin (m2)
4.6 181.56
4.8 197.70
5 214.51
5.2 232.02
5.4 250.21
5.6 269.09
5.8 288.65
6 308.90
6.2 329.84
6.4 351.46
6.6 373.77
6.8 396.76
7 420.45
7.2 444.81
7.4 469.87
7.6 495.61
7.8 522.04
Wall mounted
m (kg) Amin (m2)
< 1.224 -
1.224 1.43
1.4 1.87
1.6 2.44
1.8 3.09
2 3.81
2.2 4.61
2.4 5.49
2.6 6.44
2.8 7.47
3 8.58
3.2 9.76
3.4 11.02
3.6 12.36
3.8 13.77
4 15.25
4.2 16.82
4.4 18.46
Wall mounted
m (kg) Amin (m2)
4.6 20.17
4.8 21.97
5 23.83
5.2 25.78
5.4 27.80
5.6 29.90
5.8 32.07
6 34.32
6.2 36.65
6.4 39.05
6.6 41.53
6.8 44.08
7 46.72
7.2 49.42
7.4 52.21
7.6 55.07
7.8 58.00
Ceiling Mounted
m (kg) Amin (m2)
< 1.224 -
1.224 0.956
1.4 1.25
1.6 1.63
1.8 2.07
2 2.55
2.2 3.09
2.4 3.68
2.6 4.31
2.8 5.00
3 5.74
3.2 6.54
3.4 7.38
3.6 8.27
3.8 9.22
4 10.21
4.2 11.26
4.4 12.36
Ceiling Mounted
m (kg) Amin (m2)
4.6 13.50
4.8 14.70
5 15.96
5.2 17.26
5.4 18.61
5.6 20.01
5.8 21.47
6 22.98
6.2 24.53
6.4 26.14
6.6 27.80
6.8 29.51
7 31.27
7.2 33.09
7.4 34.95
7.6 36.86
7.8 38.83

18
INSTALLATION
ENGLISH
≥ 1.5 m
Unit
[Room A] [Room B]
→ ≥ 50 % of Anvmin
→ ≥ 100 % of Anvmin
- Anvmin : the minimum opening for natural ventilation
If this product is installed in the a room smaller than minimum floor area, there shall be
continuously operated mechanical ventilation system or natural ventilation openings.
Natural ventilation
The floor area of “Room A + Room B” is considered as floor area instead of “Room A” for
complying with minimum floor area “Amin” if :
- Openings are permanent openings which cannot be closed.
- Room A shall be larger than 0.64 m2
Bottom opening:
- The area of any openings above 300 mm from the floor shall not be considered in determining
compliance with Anvmin.
- At least 50 % of the required opening area Anvmin shall be below 200 mm from the floor.
- The bottom of the lowest openings shall not be higher than 100 mm from the floor.
- If the openings starts from the floor, the height must be higher than 20 mm.
Top opening:
- The total size of the top opening shall not be less than 50 % of minimum opening area for
Anvmin and shall be at least 1.5 m above the floor.
m (kg) Amin (cm2)
1.224 51.2
1.4 73.5
1.6 98.8
1.8 124.1
2.0 149.4
2.2 174.7
2.4 200.0
2.6 225.3
2.8 250.6
3.0 275.9
m (kg) Amin (cm2)
3.2 301.2
3.4 326.5
3.6 351.8
3.8 377.1
4.0 402.4
4.2 427.7
4.4 453.0
4.6 478.3
4.8 503.6
5.0 528.9

19
INSTALLATION
ENGLISH
Mechanical ventilation
If there is a mechanical ventilation system that satisfies with minimum air flow, a product can be
installed in the room smaller than the minimum floor area.
• The room shall comply with machinery room’s requirements of ISO 5149.
m (kg) Amin (m2)
< 1.224 -
1.224 1.43
1.3 1.61
1.4 1.87
1.5 2.15
1.6 2.44
1.7 2.76
1.8 3.09
1.9 3.44
2 3.81
2.1 4.20
2.2 4.61
2.3 5.04
2.4 5.49
2.5 5.96
2.6 6.44
2.7 6.95

20
INSTALLATION OF INDOOR UNIT
ENGLISH
INSTALLATION OF INDOOR UNIT
The indoor unit of Hydro Kit is installed inside where terminal of under floor water pipe cycle
and refrigerant pipe from the outdoor unit are accessible at the same time.
In this chapter conditions for installation place is described. In addition, considerations when
installing accessories or 3rd party accessories are described, too.
Conditions where Indoor Unit is Installed
Specific conditions are required for installation place such as service space, wall mounting, water
pipe length and height, total volume of water, adjusting expansion vessel, and water quality.
General Considerations
Followings are should be considered before the installation of the indoor unit.
- The installation place should be free from outdoor weather conditions such as rain, snow, wind,
frost, etc.
- Choose the place where is water-resistant or good drainage.
- Service space should be secured.
- No flammable materials around the indoor unit.
- Mice can not be appeared to prevent entering the indoor unit or attacking wires.
- Do not place anything in front of the indoor unit to ensure air circulation around the indoor unit.
- Do not locate anything under the indoor unit to be free from unexpected water out.
- In case of water pressure increasing to 3 bar, water drainage should be treated when water is
drained by safety valve.
Service Space
- Ensure that the spaces indicated by arrows around bottom,
side, and top side.
- Wider spaces are preferred for easy maintenance and piping.
- If minimum service space is not secured, air circulation can
be troubled and internal parts of the indoor unit can be
damaged by overheating.
200
250
200
1 300
Minimum service space
(unit : mm)
NOTE
• The default setting of the product is for heating only.
To use the cooling system together, DIP S / W 4
should be turned ON and additional drain pan
accessory should be installed.