KPHTC411M LG Air to Water Heat Pump Monobloc User Manual

LG AIR-TO-WATER HEAT
PUMPMONOBLOC
ENGINEERING MANUAL

KPHTC411M LG Air to Water Heat Pump Monobloc

KPHTC411M (41,000 Btu/h)
KPHTC481M (48,000 Btu/h)
KPHTC551M (55,000 Btu/h)

PROPRIETARY DATA NOTICE
This document, as well as all reports, illustrations, data, information, and other materials are the property of LG Electronics U.S.A., Inc., and are disclosed by LG Electronics U.S.A., Inc. only in confidence.
This document is for design purposes only.
For more technical materials such as submittals, catalogs, installation, owner’s, and service manuals, visit www.lghvac.com.
A summary list of safety precautions is on page 4.

For continual product development, LG Electronics U.S.A., Inc., reserves the right to change specifications without notice.
© LG Electronics U.S.A., Inc.
This document, as well as all reports, illustrations, data, information, and other materials are the property of LG Electronics U.S.A., Inc.

TABLE OF SYMBOLS

DANGER| This symbol indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
---|---
WARNING| This symbol indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION| This symbol indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
Note:| This symbol indicates situations that may result in equipment or property damage accidents only.
| This symbol indicates an action that must not be performed.

UNIT NOMENCLATURE

LATS AWHP

LATS (LG Air Conditioner Technical Solution) AWHP Program
A properly designed and installed refrigerant piping system is critical to the optimal performance of LG air-conditioning systems. To assist engineers, LG offers, free of charge, LG Air Conditioner Technical Solution (LATS) software—a total design solution for LG air conditioning systems. Contact your LG Rep for the best software program for your application.
LATS AWHP program is the Air-to-Water Heat Pump Model Selection program. This program can provide Monthly Heating Energy Consumption, Annual Heating Energy Consumption, System Comparison, Payback, CO2 Emission data. Therefore, by using the LATS AWHP program, a designer can have the Heating Energy Consumption Data.

Note:
To reduce the risk of designing an improper applied system or one that will not operate correctly, LG requires that LATS software be used on all projects.

GENERAL DATA / SPECIFICATIONS

Nominal Capacity Specification s
Table 1: Monobloc General Data.

Nominal Capacity and Nominal Input| Outdoor Temp. DB / WB (°F)| Leaving Water Temp. (°F)| KPHTC411M| KPHTC481M| KPHTC551M
---|---|---|---|---|---
Capacity¹| Cooling (Btu/h)| 95 / 75.2| 64.4| 41,000| 48,000| 55,000
Heating (Btu/h)| 44.6 / 42.8| 95| 41,000| 48,000| 55,000
35.6 / 33.8| 95| 37,500| 41,000| 47,100
Power Input| Cooling (kW)| 95 / 75.2| 64.4| 2.53| 3.26| 4.00
Heating (kW)| 44.6 / 42.8| 95| 3.64| 4.24| 3.40
35.6 / 33.8| 95| 3.01| 3.31| 3.83
EER| Cooling (Btu/Wh)| 95 / 75.2| 64.4| 16.21| 14.73| 13.75
COP| Heating (W/W)| 44.6 / 42.8| 95| 4.90| 4.80| 4.70
35.6 / 33.8| 95| 3.65| 3.63| 3.60
Rated Water Flow Rate at Leaving Water Temp. 95ºF (GPM)| 9.1| 10.6| 12.2

1. Performances values indicated above are in accordance with EN14511.
   Electrical Specifications
   Table 2: Monobloc Electrical Data.Electrical Specifications| KPHTC411M| KPHTC481M| KPHTC551M
   ---|---|---|---
   Power Supply (V/ Ø/ Hz)| 220-240 / 1 / 60
   Peak Control Running Current (A)| 23.0| 24.0| 25.0
   Rated Running Current²| Cooling (A)| 11.2| 14.4| 17.7
   Heating (A)| 10.9| 12.9| 15.1
   Circuit breaker (A)³| 40| 40| 40
   Power Wiring Connections4| Power Supply Cable
   (included Earth, H07RN-F)| 6.0 Mm2 (10 AWG) x 3 cores
   Voltage Range (Min. to Max.)| 198 – 264

2. Rated running currents are based on the declared values under the following conditions.
   • Cooling: Outdoor Temp. 44.6°F DB / 42.8°F WB Leaving Water Temp. 95°F
   • Heating: Outdoor Temp. 95°F DB / 75.2°F WB, Leaving Water Temp. 64.4°F

3. All installation sites must be equipped with an earth leakage circuit breaker (ELCB).

4. Wiring cable size must comply with the applicable local and national codes. .

Unit Data
Table 3: Monobloc Unit Data.

Shipping Dimensions
(W x H x D, in.)| 53-45/64 x 60-7/64 x 18-9/64| 53-45/64 x 60-7/64 x 18-9/64| 53-45/64 x 60-7/64 x 18-9/64
Weight| Net Weight (lbs.)| 262.6| 262.6| 262.6
Shipping Weight (lbs.)| 295.6| 295.6| 295.6
Exterior| Color| Warm Gray| Warm Gray| Warm Gray
RAL Code| RAL 7044| RAL 7044| RAL 7044

1. Sound power level is measured in accordance with ISO 9614.
   • Rated : This mode is measured on the rated condition in the semi-anechoic rooms. Therefore, these values may vary depending on operation conditions.
   • Daytime Max : This mode is measured based on max. fan RPM and max. compressor Hz. that can be reached under outdoor air temperature of 35.6 °F.
   • Low Noise : This mode lowers noise by limiting the compressor Hz. and fan RPM, and thus the performance may be limited.

2. Sound pressure level is converted value at 1m distance from sound power level based on tonality penalty of 0dB and installation in free-field.
   SPL = SWL – 20log(r) + Kt + K₀ – 11
   r: distance, Kt (Add-on tonality): 0dB, K₀ (Solid Angle for installation condition): 3dB for free-field

Water Specifications
Table 4: Monobloc Water Data.

Operation Range
(Leaving Water Temp.)| Cooling Min. ~ Max. (°F)| 41 ~ 80.6| 41 ~ 80.6| 41 ~ 80.6
Heating Min. ~ Max. (°F)| 59 ~ 149| 59 ~ 149| 59 ~ 149
DHW¹ Min. ~ Max. (°F)| 59 ~ 176| 59 ~ 176| 59 ~ 176
Water Pump| Type| Canned type for hot water circulation
Model| UPML 20-105 CHBL / GRUNDFOS
Motor Type| BLDC
Steps of Pumping Performance| Variable speed 10% to 100%
Power input (W) Min. / Rated (100% Capacity)| 3.5 / 125| 3.5 / 135| 3.5 / 140
Water Flow Rate Min. / Rated (GPM)| 0 / 12.15| 0 / 12.15| 0 / 12.15
Expansion Vessel| Volume Max. (gal)| 2.1| 2.1| 2.1
Water pressure (PSI)| Max.| 43.5| 43.5| 43.5
Pre-charged| 14.5| 14.5| 14.5
Flow Sensor| Model| SIKA VVXC9SNBUC00242P
Measuring range Min. ~ Max.(GPM)| 1.3~21.1| 1.3~21.1| 1.3~21.1
Flow (Trigger point) Min. (GPM)| 3.96| 3.96| 3.96
Water Pressure sensor| Model| SENSATA 2HMP3-1
Measuring range Min. ~ Max.(PSI(G))| 0~290| 0~290| 0~290
Piping Connections| Inlet (inch)| Male PT 1” according to ISO 7-1 (tapered pipe threads)
Outlet (inch)| Male PT 1” according to ISO 7-1 (tapered pipe threads)
Strainer| Mesh size (inch)| 30 mesh| 30 mesh| 30 mesh
Max. particle size (inch)| 1-3/16| 1-3/16| 1-3/16
Material| Stainless Steel| Stainless Steel| Stainless Steel
Relief Valve| Pressure Limit (Upper) (PSI)| 43.5| 43.5| 43.5
Devices for Water Circuit| Relief valve / Flow Sensor
Drain hose
Pressure Sensor / Air vent

1. Domestic Hot Water (DHW) 131 ~ 176 °F operation range is available only when the booster heater is operating.

Refrigerant Specifications
Table 5: Monobloc Refrigerant Data.

Operation Range
(Outdoor Temp.)| Cooling
Min. ~ Max (°F DB)| 41 to 118.4
Heating
Min. ~ Max (°F DB)| -13 to 95
Compressor| Type| Hermetic Sealed Scroll
Model x No.| RJB036MAA × 1
Motor Type| BLDC
Displacement| 1.93 in ^3/Rev.
Refrigerant¹| Type| R32
GWP (Global Warming Potential)| 675| 675| 675
Precharged Amount| 4.41 lbs
t-CO2 eq.| 1.35| 1.35| 1.35
Control| Electronic Expansion Valve
Refrigerant Oil| Type| FW68D| FW68D| FW68D
Charged Volume cc × No.| 1,100| 1,100| 1,100
Heat Exchanger| Type| Fin & Tube
Quantity| 2| 2| 2
Specification| Row EA| 32| 32| 32
Column EA| 2| 2| 2
FPI EA| 18| 18| 18
Fan| Type| Propeller
Air Flow Rate Rated CFM × No| 2119 x 2
Fan Motor| Type| BLDC
Output W × No.| 124 × 2| 124 × 2| 124 × 2

ACCESSORIES

Accessories for KPHTC411M, KPHTC481M, KPHTC551M

DIMENSIONS

Dimensions for KPHTC411M, KPHTC481M, KPHTC551M
Figure 3: Dimensions.
Note

1. Unit must be installed in compliance with the installation manual in the product box.
2. Unit must be grounded in accordance with the local regulations or applicable national codes.

ACOUSTIC DATA

Sound Power Levels
Data is valid at diffuse field condition.
Reference acoustic intensity 0dB = 10E-6μW/m2
Sound power level is measured on the rated condition in the reverberation rooms. Refer to the Model Specifications for nominal conditions (Power source, Ambient temperature, etc).
Sound levels can be increased in accordance with installation and operating conditions.
Sound level will vary depending on a range of factors such as the construction (acoustic absorption coefficient) of particular installed place in which the equipment in installed.
Sound power level is measured in accordance with ISO 9614.

• Rated: This mode is measured on the rated condition in the semi-anechoic rooms. Therefore, these values may vary depending on operation conditions.
• Daytime max: This mode is measured based on max. fan RPM and max. compressor Hz. that can be reached under outdoor air temperature of 35.6°F.
• Low noise: This mode lowers noise by limiting the compressor Hz. and fan RPM, and thus the performance may be limited.

Table 6: Sound Power Levels (dB[A]).

Sound Power Graphs
Figure 4: Sound Power Graphs.

REFRIGERANT FLOW DIAGRAM

Refrigerant Flow Diagram for KPHTC411M, KPHTC481M, KPHTC551M
Figure 5: Refrigerant Flow Diagram.

WATER CYCLE DIAGRAM

Water Cycle Diagram for KPHTC411M, KPHTC481M, KPHTC551M
Figure 6: Water Cycle Diagram.
Water cycle

WATER CYCLE DIAGRAM
Water Cycle Diagram Legend

expressed based on Cooling mode.
S10| Refrigerant temperature sensor (Liquid side)| CN_PIPE_IN
Sll| Water temperature sensor (Water In)| Water IN|
S12| Water temperature sensor (Water Out)| Water _OUT|
Al| Internal water pump| CN_PUMP_A1
CN_MOTOR1| – Power is supplied via CN3UMP_A1
– PWM signal is supplied via CN_MOTOR1
S17| Flow Sensor| CN_F_SENSOR| – To monitor water flow rate
EXP/TANK| Expansion Tank| (no connector)| – Absorb volume change of heated water,
S21| Remote Air temperature sensor| CN_ROOM| – Optional accessory (sold separately)
– Model: PQRSTAO
CTR/PNL| Remote Controller| CN_REMO|
A12| To control water flow for Fan Coil Unit| CN 2WAY(A)| – 3th party accessory and Field installation (sold separately)
– 2 wire NO or NC type 2way valve is supported.
M / F| Magnetic Filter| (No connector)| – 3rd party accessory and Field installation (sold separately)
– It is Mandatory to install an additional filter on the heating water circuit.
Electric Heater| AS / A9| Electric Backup Heater| TB HEAT CONTACT| – 3rd party accessory and Field installation (sold separately) – Provides a 2-step control communication contact point.
S13| Backup heater outlet temperature sensor| CN_TH3
Domestic hot water circuit| W/TANK| DHW Tank| (no connector)| – 3rd party accessory and Field installation (sold separately)
– Generating and storing DHW by AWHP or built-in electric heater
A10| Booster heater(in DHW tank)| CUANI(HEATER| – 3rd party accessory and Field installation (usually built-in at W/TANK)
– Supplying additional water heating capacity.
A5| – Flow control for water which is leaving from unit.
– Flow direction switching between underfloor and water tank| CN 3WAY(A)| – 3rd party accessory and Field installation (sold separately)
– SPDT type 3way valve is supported.
A15| Recirculation pump| CN_PUMP A15|
CITY WATER| Water to be heated by Indoor unit and B/HT of W/TANK| (no connector)| – Field installation
SHOWER| Water supplied to end-user| (no connector)| – Field installation
S14| W/TANK water temperature sensor| CN_TH4| – Optional accessory (sold separately) – Model : PQRSTAO
Solar thermal circuit| S15| Solar collector sensor| TB_SENSOR
(SOLAR)| – 3rd party accessory and Field installation (sold separately)
– PT1000
3 WAY
Valve_2| – Flow control for water which is heated and circulated by SOLAR THERMAL SYSTEM.
– Flow direction switching between SOLAR THER- MAL SYSTEM and W/TANK| CN- 3WAY(B)| – 3rd party accessory and Field installation (sold separately)
– SPDT type 3way valve is supported.
A4| External Water Pump| CN_W/PUMP(B)| – 3rd party accessory and Field installation (sold separately)
– If water pump of SOLAR THERMAL SYSTEM is incapable of circulation,external water pump can be used.
SOLAR THERMAL SYSTEM| Solar thermal equipment such as collector, solar pump, sensor, solar heat-exchanger| (no connector)| – 3rd party accessory and Field installation (sold separately)

HYDRAULIC PERFORMANCE

The water pump is variable type which is capable to change flow rate, so it may be required to change default water pump capacity in case of noise by water flow. In most cases, however, it is strongly recommended to set capacity as Maximum.

Pressure Drop
Table 7: Pressure Drop.

Capacity Btu/h| Rated flow-rate
[LPM(GPM)]| Pump Head [m(ft)] (at rated flow- rate)| Product pressure drop [m(ft)] (Plate heat exchanger)| Serviceable Head [m(ft)]| Min. flow-rate
[LPM(GPM)] (Recommend)
---|---|---|---|---|---
41,000| 34.5(9.11)| 9.8(32.15)| 0.8(2.62)| 9(29.53)| 20(5.28)
48,000| 40.3(10.65)| 9.3(30.51)| 1.1(3.61)| 8.2(26.90)
55,000| 46.0(12.15)| 9(29.53)| 1.4(4.59)| 7.6(24.93)

Note:

• To secure enough water flow rate, do not set water pump capacity as Minimum. It can lead to unexpected flow rate error CH14.
• When installing the product, install additional pump in consideration of the pressure loss and pump performance.
• If flow-rate is low, overloading of product can occur.

GRUNDFOS Water Pump (UPML 20 – 105 CHBL) (41,000, 48,000, 58,000 Btu/h)
Figure 7: Water Q-H chart.

Performance test based on standard ISO 9906 with pre-pressure 2.0 bar (PSI 29) and liquid temperature 68°F.

WIRING DIAGRAM

Wiring Diagram for KPHTC411M, KPHTC481M, KPHTC551M
Figure 8: Wiring Diagram.
ELECTRICAL CONNECTIONS
Electrical Data

Outdoor Unit| Hertz| Voltage| Voltage range
(Min. to Max.)| MCA| MOP| Compressor Quantity| Compressor Motor RLA (Heating)| Other Motor
---|---|---|---|---|---|---|---|---
KPHTC411M| 60| 220-240| 198 – 264| 35| 40| 1| 24.3| Fan Motor 2EA: 0.6 Water Pump: 1.1
KPHTC481M
KPHTC551M

General Power Wiring / Communications Cable Guidelines

• Follow manufacturer’s circuit diagrams displayed on the inside of the control box cover.
• Have a separate power supply for the indoor units.
• Provide a circuit breaker switch between the power source and the indoor unit.
• Confirm power source specifications.
• Properly ground the outdoor unit and the indoor unit per NEC and local codes.
• Connect the wiring firmly so that the wires cannot be easily pulled out.
• Confirm that the electrical capacity is sufficient.
• Power supply to the outdoor unit must be selected based on NEC and local codes. Maximum allowable voltage fluctuation ±10% or name- plate rated value.
• It is recommended that a circuit breaker is installed, especially if conditions could become wet or moist.
• Include a disconnect in the power wiring system. Add an air gap contact separation of at least 1/8 inch in each active (phase) conductor.
• Any openings where the field wiring enters the cabinet must be completely sealed.

Do not install power wiring to the outdoor unit and the communication / connection (power) cable to the indoor unit in the same conduit.
Use separate conduits.

• Consider ambient conditions (ambient temperature,direct sunlight, rain liquid,etc.) when proceeding with the wiring and connections.
• The wire size is the minimum value for metal conduit wiring. The power cord size must be 1 rank thicker taking into account the line voltage drops. Make sure the power-supply voltage does not drop more than 10%.
• Comply with local codes for wiring requirements.
• Power supply cords of parts of appliances for outdoor use should not be lighter than polychloroprene sheathed flexible cord.
• Use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include some amount of direct current.
• Don’t install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.

DIP SWITCH SETTINGS

WARNING
Turn off electric power supply before setting DIP switches.
There is risk of electric shock, physical injury or death.

Figure 9: Dip Switch Settings.

Option switch 1

Figure 10: Dip Switch 1.
Dip switch SW1

MODBUS
Communication Type| 1 | As Main
(LG extension modules)| 1
1 | As Sub
(3rd party controller)
MODBUS Function| 2 | Special protocol (REGIN)| 2
2 | Unified Open Protocol
Antifreeze Agent| 8 | Antifreeze agent is not used| 8
8 | Antifreeze agent is used *

Note

• Possibility to allow colder water temperature by setting.
  Bridge at CN_ANTI_SW on indoor PCB must be disconnected to enable setting.

DIP SWITCH SETTINGS

Dip Switch SW2
Figure 11: Dip Switch 2.

3
| Heat pump + DHW tank is installed
| Heat pump
+ DHW tank
+ Solar thermal system is installed
Cycle| 4 | Heating Only| 4
4 | Heating & Cooling
Room Air Sensor| 5 | Room Air Sensor is not installed| 5
5 | Room Air Sensor is installed
Selecting electric heater capacity| | Electric heater is not used| 6
7
| Half capacity is used only for HA061 M(AHEH066A)
| Full capacity is used
Thermostat installation information| 8 | Thermostat is NOT installed| 8
8 | Thermostat is installed

DIP SWITCH SETTINGS

Outdoor PCB
Figure 12: Outdoor PCB

Dip Switch Information

4
3 4| Peak Control Step 1
– To limit maximum current (Power saving)
3 4| Peak Control Step 2
– To limit maximum current  (Power saving)

• Dip switches no. 2, 3, and 4 are available.
• When setting the Partial Mode, Mode can be exited to secure capacity after operating for a certain time.

Peak Control Mode Running Current (A)
Input current value can be limited by Dip switch operation

Peak Control Mode Running Current (A)

Capacity (Btu/h)| 1 Step| 2 Step
41,000| 23| 20
48,000| 24| 21
55,000| 25| 22

OPERATION RANGE

Cooling Operation Range: Outlet Temp. Control with Fan Coil Unit

• Continuous Operation: Capacity is not guaranteed in Continuous Operation.
• Operative: Continuous operation is not guaranteed.

Cooling Operation Range: Inlet Temp. control with Fan Coil Unit

• Continuous Operation: Capacity is not guaranteed in Continuous Operation.
• Operative: Continuous operation is not guaranteed.

Cooling Operation Range: Outlet temp. control without Fan Coil Unit

• Continuous Operation: Capacity is not guaranteed in Continuous Operation.
• Operative: Continuous operation is not guaranteed.

Cooling Operation Range: Inlet Temp. control without Fan Coil Unit

• Continuous Operation: Capacity is not guaranteed in Continuous Operation.
• Operative: Continuous operation is not guaranteed.

Heating Operation Range: Outlet Temp. Control

• Continuous Operation: Capacity is not guaranteed in Continuous Operation.
• Operative: Continuous operation is not guaranteed.

Heating Operation Range: Inlet Temp. Control

• Continuous Operation: Capacity is not guaranteed in Continuous Operation.
• Operative: Continuous operation is not guaranteed.

PERFORMANCE DATA

Maximum Cooling Capacity Tables
Maximum Cooling Capacity Table for KPHTC411M

Table 8: Max. Cooling Capacity Table.

Maximum Cooling Capacity Table for KPHTC481M
Table 9: Max. Cooling Capacity Table.

1. DB : Dry bulb temperature(°F), LWT: Leaving water temperature(°F), GPM: gallon per minute (gal/min)

2. EER: Energy efficiency ratio(BTU/Wh), COP: Coefficient of performance (W/W)

3. Direct interpolation is permissible. Do not extrapolate.

4. Measuring procedure follows EN14511.
   • Rated values are based on standard conditions, see specifications for details.
   • Above table values may not be matched according to installation condition. Except for rated value, the performance is not guaranteed.
   • In accordance with the test standard(or nations), the results may vary.

5. Shaded areas: Continuous operation is not guaranteed.

Maximum Cooling Capacity Table for KPHTC551M
Table 10: Max. Cooling Capacity Table.

1. DB: Dry bulb temperature(°F), LWT: Leaving water temperature(°F), GPM: gallon per minute (gal/min)

2. EER: Energy efficiency ratio(BTU/Wh), COP: Coefficient of performance (W/W)

3. Direct interpolation is permissible. Do not extrapolate.

4. Measuring procedure follows EN14511.
   • Rated values are based on standard conditions, see specifications for details.
   • Above table values may not be matched according to installation condition. Except for rated value, the performance is not guaranteed.
   • In accordance with the test standard(or nations), the results may vary.

5. Shaded areas: Continuous operation is not guaranteed.

Maximum Heating Capacity Table for KPHTC411M (includes defrost effect)
Table 11: Max. Heating Capacity Table.

1. DB : Dry bulb temperature(°F), LWT: Leaving water temperature(°F), GPM: gallon per minute (gal/min)

2. EER: Energy efficiency ratio(BTU/Wh), COP: Coefficient of performance (W/W)

3. Direct interpolation is permissible. Do not extrapolate.

4. Measuring procedure follows EN14511.
   • Rated values are based on standard conditions, see specifications for details.
   • Above table values may not be matched according to installation condition. Except for rated value, the performance is not guaranteed.
   • In accordance with the test standard(or nations), the results may vary.

5. Shaded areas: Continuous operation is not guaranteed.

Maximum Heating Capacity Table for KPHTC481M (includes defrost effect)
Table 12: Max. Heating Capacity Table.

1. DB : Dry bulb temperature(°F), LWT: Leaving water temperature(°F), GPM: gallon per minute (gal/min)

2. EER: Energy efficiency ratio(BTU/Wh), COP : Coefficient of performance (W/W)

3. Direct interpolation is permissible. Do not extrapolate.

4. Measuring procedure follows EN14511.
   • Rated values are based on standard conditions, see specifications for details.
   • Above table values may not be matched according to installation condition. Except for rated value, the performance is not guaranteed.
   • In accordance with the test standard(or nations), the results may vary.

5. Shaded areas: Continuous operation not guaranteed.

Maximum Heating Capacity Table for KPHTC551M (includes defrost effect)
Table 13: Max. Heating Capacity Table.

1. DB : Dry bulb temperature(°F), LWT: Leaving water temperature(°F), GPM: gallon per minute (gal/min)

2. EER: Energy efficiency ratio(BTU/Wh), COP: Coefficient of performance (W/W)

3. Direct interpolation is permissible. Do not extrapolate.

4. Measuring procedure follows EN14511.
   • Rated values are based on standard conditions, see specifications for details.
   • Above table values may not be matched according to installation condition. Except for rated value, the performance is not guaranteed.
   • In accordance with the test standard(or nations), the results may vary.

5. Shaded areas: Continuous operation is not guaranteed.

PLACEMENT CONSIDERATIONS

Application Guidelines
Selecting the Best Location for the Unit
DANGER
Do not install the unit in an area where combustible gas may generate, flow, stagnate, or leak. These conditions can cause a fire, resulting in bodily injury or death.

• Do not install the unit in a location where acidic solution and spray (sulfur) are often used as it can cause bodily injury or death.
• Do not use the unit in environments where oil, steam, or sulfuric gas are present as it can cause bodily injury or death.

WARNING
When deciding on a location to place the unit, be sure to choose an area where run-off from defrost will not accumulate and freeze on sidewalks or driveways, which may create unsafe conditions. Properly install and insulate any drain hoses to prevent the hose from freezing, cracking, leaking, and causing unsafe conditions from frozen condensate.

Install a fence to prevent vermin from crawling into the unit or unauthorized individuals from accessing it.
Select a location for installing the outdoor unit that will meet the following conditions:

• Where there is enough strength to bear the weight of the outdoor unit.
• A location that allows for optimum air flow and is easily accessible for inspection, maintenance, and service.
• Where piping between the outdoor unit and indoor unit(s) are within allowable limits.
• Include space for drainage to ensure condensate flows properly out of the unit when it is in heating mode. Avoid placing the outdoor unit in a low-lying area where water could accumulate.
• If the outdoor unit is installed in a highly humid environment (near an ocean, lake, etc.), ensure that the site is well-ventilated and has a lot of natural light (Example: Install on a rooftop).

Don’ts

• Where it will be subjected to direct thermal radiation from other heat sources, or an area that would expose the outdoor unit to heat or steam like discharge from boiler stacks, chimneys, steam relief ports, other air conditioning units, kitchen vents, plumbing vents, and other sources of extreme temperatures.
• Where high-frequency electrical noise / electromagnetic waves will not affect operation.
• Where operating sound from the unit will disturb inhabitants of surrounding buildings.
• Where the unit will be exposed to direct, strong winds.
• Where the discharge of one outdoor unit will blow into the inlet side of an adjacent unit (when installing multiple outdoor units).

Note:
The unit may take longer to provide heat, or heating performance will be reduced in winter if the unit is installed:

1. In a narrow, shady location.
2. Near a location that has a lot of ground moisture.
3. In a highly humid environment.
4. In an area in which condensate does not drain properly.

Wind Protection
If the unit is placed on a roof, or in a place that is constantly exposed to a strong wind, secure a normal fan operation by using a duct or a wind shield.

• Install the unit so that its discharge port faces the wall of the building. Keep a distance of 11.81 inches or more between the unit and the wall surface.

Note:
Choose an area where run-off from defrost mode will not accumulate and freeze on sidewalks or driveways. Properly install and insulate any drain hoses to prevent the hose from freezing, cracking, leaking, and damaging the outdoor unit.

Installation
This product must be installed outdoors.
Condensate Drain Piping
Outdoor unit requires condensate drain piping. Condensate drain pipe is constructed with materials approved by local code.

CAUTION
When deciding on a location to place the outdoor unit, be sure to choose an area where run-off from defrost will not accumulate and freeze on sidewalks or driveways, which may create unsafe conditions.

Planning for Snow and Ice
To ensure the outdoor unit operates properly, certain measures are required in locations where there is a possibility of heavy snowfall or
severe windchill or cold:

1. Prepare for severe winter wind chills and heavy snowfall, even in areas of the country where these are unusual phenomena.
2. Position the outdoor unit so that its airflow fans are not buried by direct, heavy snowfall. If snow piles up and blocks the airflow, the system may malfunction.
3. Remove any snow that has accumulated four (4) inches or more on the top of the outdoor unit.
4. In climates that may experience significant snow buildup, mount the outdoor unit on a raised, field-provided platform or stand. The raised support platform must be high enough to allow the unit to remain above possible snow drifts, and must be higher than the maximum anticipated snowfall for the location.
5. Design the mounting base to prevent snow accumulation on the platform in front or back of the unit frame.
6. Provide a field fabricated snow protection hood to keep snow and ice and/or drifting snow from accumulating on the coil surfaces.
7. Consider tie-down requirements in case of high winds or where required by local codes.

Clearances
If an awning is built over the unit to prevent direct sunlight or rain exposure, make sure that heat radiation from the condenser is not restricted. Secure the space, considering field installation of the shut-off valve and strainer.

Figure 11: Clearances

TRANSPORTING / LIFTING

Transporting / Lifting
When lifting the unit, use lifting straps and place around the unit as shown. When carrying the suspended unit, pass the ropes under the unit and use the two suspension points each at the front and rear.

• Always lift the unit using properly sized lifting straps rated to carry the unit weight.
• Ensure the straps are long enough to maintain a maximum of a 40° angle as shown.
• Use only accessories and parts which are of the designated specification when installing.

WARNING

• Use appropriate moving equipment to transport each frame; ensure the equipment is capable of supporting the weights listed above. If the equipment is not properly secured, it may result in an accident that causes physical injury or death.

• Wear protective gloves when handling equipment. Sharp edges may cause personal injury.

• Some products include polypropylene bands around the unit for packaging.
  Do not use polypropylene bands to lift the unit. There is a risk of the product falling and causing physical injury.

• Tear apart and throw away plastic packaging bags so that children may not play with them and risk suffocation and death.

• Consider the unit’s center of gravity before lifting. Hoist the unit with the center of gravity centered among the lifting straps. There is a risk of the product falling and causing physical injury.

• Lift the water source unit from the base at specified locations. Support the unit at a minimum of six (6) points to avoid slippage from the rigging apparatus, and use a minimum of three (3) lifting straps. There is a risk of the product falling and causing physical injury.

• Use caution when using a forklift to transport an unpackaged unit.
  Do not drop the unit when carrying it with a forklift. There is a risk of the product falling and causing physical injury.

Note
Place a protective cloth or other soft material at the locations where the casing comes in contact with the lifting straps to prevent damage to painted surfaces.

Figure 12: Moving requirements.

Note:

• All referenced materials are to be field-supplied.
• Images are not to scale.

FOUNDATION FOR INSTALLATION

General Mounting

• The underlying structure or foundation must be designed to support the weight of the unit, and avoid placing the outdoor unit in a low lying area where water may accumulate.
• Refer to installation manual, and follow the applicable local code for clearance, mounting, anchorand vibration attenuation requirements.
• Check the strength and level of the installation ground so that the unit does not cause any operating vibration or noise after installation.
• Remove the Pallet (Wood Support) from the bottom of the outdoor unit Base Pan before bolting the unit.
• Fix the unit securely with foundation bolts. Prepare 4 sets of M12 foundation bolts, nuts and washers.
• Screw in each foundation bolt until the length is 25/32 inch from the foundation surface.

Figure 14: Bolting requirements.

WARNING

• Ensure that the floor / chosen location has enough strength to support the weight of the unit(s). If it does not have sufficient strength, the unit may fall and cause physical injury or death.
• Remove the Pallet (Wood Support) of the bottom side of the outdoor unit before welding. Not removing Pallet (Wood Support) can cause fire hazard during welding that can result in bodily injury or death.

Note:
Remove the Pallet (Wood Support) from the bottom of the outdoor unit Base Pan before bolting the unit. Otherwise, it may make the outdoor unit unstable and cause freezing of the heat exchanger, resulting in abnormal operations.

Figure 13: Bolting requirements.

WATER CONTROL

Water Quality
Water quality must comply with EN 98/83 EC Directives. See table below for detailed guide.

Note:

• If the product is installed at existing hydraulic water loop, it is important to clean hydraulic pipes to remove sludge and scale.
• Installing sludge strainer in the water loop is very important to prevent performance degradation.
• Chemical treatment to prevent rust must be performed by installer.
• It is strongly recommended to install an additional filter on the heating water circuit. To remove metallic particles from the heating piping, it is strongly recommended to use a magnetic or cyclone filter, which can remove small particles. Small particles may  damage the unit and will NOT be removed by the standard filter of the heat pump system.
• Water quality check must be implemented before completing the installation of system.

Table 14: Water quality Specifications.

71.4 ~ 151.7 (mg/L)
Iron (Fe)| ≤ 0.2 (mg/L)
Sulphate (SO42-)| ≤ 100 (mg/L)
Nitrite (NO3-)| ≤ 100 (mg/L)
Free chlorine (Cl2)| ≤ 1 (mg/L)
Chlorides (Cl-)| ppm| STS316| STS304
pH7| 59ºF| 3,000| 180
104ºF| 500| 50
140ºF| 200| 30
176ºF| 125| 20
pH9| 59ºF| 18,000| 700
104ºF| 2,600| 250
140ºF| 1,000| 170
176ºF| 550| 130

WATER CONTROL

Frost protection
In areas of the country where entering water temperatures drop below 32°F, the water pipe must be protected by using an approved antifreeze solution. Consult your heat pump unit supplier for locally approved solutions in your area.
Calculate the approximate volume of water in the system. Then add the water volume contained in the heat pump to this total volume.

Table 15: Frost protection.

Note:

• Use only one of the above antifreeze types.
• If approved antifreeze is not used, pressure drop and capability degradation of the system can occur• To prevent corrosion, add corrosion inhibitor.
• Check the concentration of the antifreeze periodically to keep same concentration.
• When antifreeze is used (for installation or operation), do not touch the antifreeze.
• Follow all local and national laws about antifreeze usage.

Capacity correction factor by antifreeze
Figure 15: Capacity correction factor by antifreeze.

Correction factor of cooling capacity
Figure 16: Correction factor of cooling capacity diagram.

Correction factor of heating capacity
Figure 17: Correction factor of heating capacity diagram.

Water Piping and Water Circuit Connection Guidelines
Water Piping and water Circuit Connection General considerations
Following must be considered before beginning water circuit connection.

• Service space must be secured.
• Water pipes and connections must be cleaned using water.
• Space for installing external water pump must be provided if internal water pump capacity is not enough for installation field.
• Do not connect electric power while proceeding water charging.

Water piping and water circuit connection

• Water piping: Installing pipes where water is flowing inside the pipe.
• Water circuit connecting : Making connection between the unit and water pipes or between pipes and pipes. Connecting valves or elbows are, for example, in this category.
• A buffer tank must be installed to reduce sudden load fluctuations. (Refer to the product installation manual.)

While installing water pipes, consider the following:

• While inserting or putting water pipes, close the end of the pipe with pipe cap to avoid dust entering.
• When cutting or welding the pipe, always be careful that inner section of the pipe should not be defective. For example, no weldments or no burrs are found inside the pipe.
• Drain piping should be provided in case of water discharge by the operation of the safety valve. This situation can happen when the internal pressure is over 3.0 bar and water inside the unit will be discharged to drain hose.

While connecting water pipes, consider the following:

• Pipe fittings (e.g. L-shape elbow, T-shape tee, diameter reducer, etc) must be tightened strongly to be free from water leakage.
• Connected sections must be leakage-proof treatment by applying teflon tape, rubber bushing, sealant solution, etc.
• Use appropriate tools and tooling methods to prevent mechanical breakage of the connections.
• Operation time of flow control valve (e.g. 3way valve or 2way valve) to be less than 90 seconds.
• Connect drain hose with drain piping

Water condensation on the floor
If underfloor cooling is performed, it is very important to keep leaving water temperature higher than 60.8°F. Otherwise, dew condensation can occur on the floor. If floor is in humid environment, do not set leaving water temperature below 64.4°F.

Water condensation on the radiator
In cooling operation, cold water may not flow to the radiator. If cold water enters the radiator, there can be dew generation on the surface of the radiator. Use 2 way-valve to block circuits from cooling operation.

Drainage
While cooling operation, condensed dew can drop down to the bottom of the unit. The condensing water must be sufficiently drained from the unit and dissipated frost-free.

Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ.
All rights reserved. “LG” is a registered trademark of LG Corp.

LG Electronics, U.S.A., Inc.
Air Conditioning Technologies
4300 North Point Parkway
Alpharetta, Georgia 30022
www.lghvac.com
New Issue: EM_AWHP_Monobloc_12_23

Read User Manual Online (PDF format)

Download This Manual (PDF format)

Download this manual  >>