LG AHU Conversion Application Guide

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AHU Conversion Kit Application Guide

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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.

Note: Legal Disclaimer: All material provided herein is for

informational or educational purposes only. It is not intended to be a substitute for professional advice. Please consult with your engineer or design professionals for application to your system.

For continual product development, LG Electronics U.S.A., Inc.,

reserves the right to change specifications without notice.

For more technical materials such as submittals, engineering manuals, and catalogs, visit www.lghvac.com.

This document, as well as all reports, illustrations, data, information, and other materials are the property of LG Electronics U.S.A., Inc.

©LG Electronics U.S.A., Inc. VRF-WP-AH-001-US1018

Due to our policy of continuous product innovation, some specifications may change without notification

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Contents

Proprietary Data Notice .....................................................................................................................2

Why use LG's AHU Conversion Kit? .....................................................................................................6

Energy Saving: LG vs. the Rest .................................................................................................................. 6

3rd Party Support ...................................................................................................................................... 7

Large Piping Distance ................................................................................................................................ 9

Definitions ....................................................................................................................................... 10

Components and Features: EEV Kits.................................................................................................. 11

PRLK048A0 .............................................................................................................................................. 11

PRLK096A0 .............................................................................................................................................. 12

PRLK396A0 .............................................................................................................................................. 13

PRLK594A0 .............................................................................................................................................. 14

Outdoor Unit + EEV Kit Combinations .................................................................................................... 15

Recommended 3rd Party Coil Volume ..................................................................................................... 16

Components and Features: Communication Kits ............................................................................... 17

PAHCMR000 ............................................................................................................................................ 17

PAHCMS000 ............................................................................................................................................ 19

Communication Kit Features .................................................................................................................. 21

DIP Switch: Communication Kits ....................................................................................................... 22

DIP Switch Settings – PAHCMR000 ......................................................................................................... 22

DIP Switch Applications with Thermostats – PAHCMR000 ..................................................................... 25

DIP Switch Settings – PAHCMS000 ......................................................................................................... 27

DIP Switch Application with Thermostats – PAHCMS000 ....................................................................... 29

Comm Kit Combinations ................................................................................................................... 31

Combination Options .............................................................................................................................. 31

EEV Kit Combinations ....................................................................................................................... 32

1:1 Combination ...................................................................................................................................... 32

1:2 Combination ...................................................................................................................................... 32

PRLK048/096A0 + PRLK396/594A0 Combination – Not Possible ........................................................... 33

PRLK594A0 + PRLK594A0 Combination – Not Possible .......................................................................... 34

PRLK396A0 + PRLK594A0 Combination – Not Possible .......................................................................... 34

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EEV + IDU Combination – Not Possible ................................................................................................... 35

EEV Kit Combination Ratio ...................................................................................................................... 35

Application Cases for Communication Kits ........................................................................................ 36

Return Air Control – 1-ODU System + 1 AHU (1 coil) + Controls ............................................................ 36

Return Air Control – 1-ODU System + 1 AHU (2 coil) + Controls ............................................................ 37

Return Air Control – 1-ODU System + 1 AHU (1 coil) + IDU + Controls .................................................. 38

Return Air Control – 1-ODU System + 1 AHU (2 coil) + IDU + Controls .................................................. 39

Return Air Control – 1-ODU System + Multiple AHU’s + Controls .......................................................... 40

Return Air Control – 2-ODU System + 1 AHU (2 coils) + Controls ........................................................... 42

Supply Air Control – 1-ODU System + 1 AHU (1 coils) + Controls ........................................................... 43

Supply Air Control – 1-ODU System + 1 AHU (2 coils) + Controls ........................................................... 44

Supply Air Control – 1-ODU System + Multiple AHU’s ............................................................................ 45

Supply Air Control – 1-ODU System + 1 AHU (1 coil) + IDU’s .................................................................. 46

Supply Air Control – 1-ODU System + 1 AHU (2 coils) + IDU’s ................................................................ 47

Supply Air Control – 2-ODU System + 1 AHU (2 coils) ............................................................................ 48

Supply Air Control – 1-ODU System + 1 AHU (2 coils) + I/O Module + DDC Control .............................. 49

Example AHU Kit for Large AHU ........................................................................................................ 51

Components Required ............................................................................................................................ 51

Selecting in LATS HVAC ........................................................................................................................... 51

Application Types .................................................................................................................................... 55

Application Examples .............................................................................................................................. 57

Office Building ..................................................................................................................................... 57

AHU Conversion Kit for Small AHU.................................................................................................... 58

Components Required ............................................................................................................................ 58

Selecting in LATS HVAC ........................................................................................................................... 58

Application Types .................................................................................................................................... 62

Application Examples .............................................................................................................................. 63

Restaurant ........................................................................................................................................... 63

Elementary/High School ..................................................................................................................... 64

Coil Design Parameters .................................................................................................................... 65

AHU Module – Design Tips (Do’s) ........................................................................................................... 65

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AHU Module – Design Tips (Dont’s) ........................................................................................................ 66

AHU Module DX Coil Sizing Parameters – Cooling .................................................................................. 66

AHU Module DX Coil Sizing Parameters – Heating ................................................................................. 67

Circuit Diagram ................................................................................................................................ 68

Supply Air Communication Kit - PAHCMS000 ......................................................................................... 68

Return Air Communication Kit - PAHCMR000 ........................................................................................ 69

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Brand

Series

Model #

Capacity

EER

IEER

Multi V5

ARUM121BTE5

10 tons

Carrier

Gemini

38AUQA12A0B5-0A0A0

10 tons

Trane

Precedent

YSC120ED

10 tons

9.5

10.97

York

Predator

XP120

10 tons

12.4

Information taken from Carrier’s Product Page: http://www.carrierenterprise.com/carrier-10-ton-heat-pump-condensing-unit-with-puron-refrigerant-38auqa12a0b5-0a0a0

Information taken from Trane’s Product Page: https://www.trane.com/commercial/north-america/us/en/products-systems/equipment/unitary/rooftop-systems/precedent-3-to-10-tons.html

Information taken from York’s Product Page: http://www.york.com/for-your-workplace/packaged-and-split-dx-systems/packaged-heat-pumps/xp-predator

LG's AHU Conversion Kit can offer energy savi ngs over conventional condensing units used with DX split system s. It allows connection of an LG Multi V inverter co mpressor condensing u nits to any third party AHU .

Compared to other convent ional condensin g units, LG's Multi V5 unit has a higher EE R rating and almost twice the IEER rating as the c ompetitors below.

2 3

24.6

12.5

Why use LG's AHU Conversion Kit?

Energy Saving: LG vs. the Rest

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Versatile: Allo ws for any air handling unit to connect with L G's outdoor units

Combination with 3rd Party AHU

Comm. Kit

PAHCMR000

PAHCMS000

EEV Kit PRLK048A0 PRLK096A0

PRLK396A0 PRLK594A0

3rd Party Support

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The AHU Conversion Kit also allows com munication between the AHU and LG's VRF Systems.

AHU Conversion Kit

Refrigerant pipe

OA Duct

LG Wired Controller

LG VM3 Controller

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Or… vertically piped as far as 360 fee t.

Allows for the Outdoor Unit to be horizontally piped as far as 656 actual feet away from the AHU

360 feet

656 feet

AHU Conversion Kit

Large Piping Distance

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Definitions

EEV Kit - Models PRLK048A0, PRLK096A, PRLK396A0 and PRLK594A0

Communication Kit (Return Air) - Model PAHCMR000

Communication Kit (Supply Air) - Model PAHCMS000

AHU Conversion Kit - Consists of an EEV Kit and a Communication Kit

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Components:

EEV Kit

Installation Manual

Shape:

Quantity (EA):

Components and Features: EEV Kits

PRLK048A0

Standard Features:

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Figure 1. PRLK048A0 EEV Kit Contents



Max Ton Capacity: 8 Tons



Btu Capacity: 12 – 96 kBtu/h



System Compatibility: Heat Pump or Heat Recovery



Controls refrigerant flow between Multi V air or water source units and a 3rd party AHU



Minimum coil entering air temperature in heating mode is 41°F



Maximum distance between EEV and Comm. kit is 32 feet



Maximum of (1) EEV kit can be connected to Comm. kit



Designed for indoor installations (field supplied water‐proof enclosure must be used

when installing outdoors)

Due to our policy of continuous product innovation, some specifications may change without notification

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Components:

EEV Kit

Installation Manual

Shape:

Quantity (EA):

PRLK096A0

Standard Features:



Max Ton Capacity: 16 Tons



Btu Capacity: 115 – 192 kBtu/h



System Compatibility: Heat Pump only



Controls refrigerant flow between Multi V air or water source units and a 3rd party air

handling unit.



Minimum coil entering air temperature in heating mode is 41°F



Maximum distance between EEV and Comm. kit is 32 feet



Maximum of (1) EEV kit can be connected to Comm. kit



Designed for indoor installations (field supplied water‐proof enclosure must be used

when installing outdoors)

Figure 2. PRLK096A0 EEV Kit Contents

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Components:

EEV Kit

Installation Manual

Shape:

Quantity (EA):

PRLK396A0

Figure 3. PRLK396A0 EEV Kit Contents

Standard Features:



Max Ton Capacity: 32 Tons



Btu Capacity: 216 – 384 kBtu/h



System Compatibility: Heat Pump only



Controls refrigerant flow between Multi V air or water source units and a 3rd party air

handling unit



Minimum coil entering air temperature in heating mode is 41°F



Maximum distance between EEV and Comm. kit is 32 feet



Maximum of (1) EEV kit can be connected to Comm. kit



Designed for indoor installations (field supplied water‐proof enclosure must be used

when installing outdoors)

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Components:

EEV Kit

Installation Manual

Shape:

Quantity (EA):

PRLK594A0

Figure 4. PRLK594A0 EEV Kit Contents

Standard Features:



Max Ton Capacity: 48 Tons



Btu Capacity: 408 - 576 kBtu/h



System Compatibility: Heat Pump only with PAHCMS000 (requires EEV module)



Controls refrigerant flow between Multi V air or water source units and a 3rd party air

handling unit



Minimum coil entering air temperature in heating mode is 41°F



Maximum distance between EEV and Comm. kit is 32 feet



Maximum of (1) EEV kit can be connected to Comm. kit



Designed for indoor installations (field supplied water‐proof enclosure must be used

when installing outdoors)

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EEV Kit

MULTI V

Outdoor Unit + EEV Kit Combinations



1 Multi V + multiple EEV Kits



Multiple Multi V’s + multiple EEV Kits



Single Split does not require expansion valves

 Basic rule: 1 DX coil required 1 Expansion Valve

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EEV Model

Capacity

(kBTU/h)

Recommended 3rd Party Coil Volume

MIN (in.3)

MAX (in.3)

PRLK048A0

67.1

234.9

85.4

299.0

109.8

384.4

134.3

469.9

164.8

576.7

189.2

662.1

207.5

726.2

244.1

854.3

250.2

875.7

329.5

1,153.3

384.4

1,345.6

PRLK096A0

115

445.5

1,559.2

134

518.7

1,815.5

153

567.5

1,986.3

172

640.7

2,242.6

192

683.5

2,392.1

PRLK396A0

216

768.9

2,691.1

240

854.3

2,990.2

264

939.8

3,289.2

288

1,025.2

3,588.2

312

1,110.6

3,887.2

336

1,196.1

4,186.2

360

1,281.5

4,485.2

384

1,366.9

4,784.3

PRLK594A0

408

1,452.4

5,083.3

432

1,543.9

5,403.6

456

1,623.2

5,681.3

480

1,708.7

5,980.3

504

1,800.2

6,300.7

528

1,879.5

6,578.4

552

1,971.1

6,898.7

576

2,050.4

7,176.4

Recommended 3rd Party Coil Volume

Table 1. Recommended 3rd Party Coil Volume

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Part

Quantity

Image

Communication Kit - Return Air

One (1) Return Air (Room) Thermistor

One (1) Pipe Out Thermistor

One (1)

Pipe In Thermistor

One (1)

Components and Features: Communication Kits

PAHCMR000

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Bracket

One (1)

Controller Assembly (Comm. PCB)

One (1)

Figure 5. PAHCMR000 Contents

Standard Features:



Function: Allows communication between third-party air handling units and LG air

source and water source units



Can connect with multiple AHU’s with indoor units



Control Options: LG Wired Controller (required for LG controls), LG Central Controller,

3rd Party AHU Controller



System Compatibility: Heat Recovery, Heat Pump



AHU Coil Capacities 12 – 384 kBtu/h for Multi V and 5-85 kBtu/h for Single Zone (41°F

minimum entering air temp)



3 Thermistors (Pipe in, pipe out, and return air. 16.4 ft. length each)



AHU Fan Control H/M/L



EEV Control



Designed for indoor installation (field-supplied waterproof enclosure required for

outdoor installation)



Can control 3 speed or single speed 3rd party fan motor (requires relays or motor

starter)



Requires 208-230 VAC, 1 phase power

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Part

Quantity

Image

Communication Kit - Supply Air

One (1)

Return Air (Room) Thermistor

One (1)

Pipe Out Thermistor

One (1) Pipe In Thermistor

One (1)

PAHCMS000

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Bracket

One (1)

Harness, Multi

One (1)

Controller Assembly (Comm. PCB and Main PCB)

One (1) Each

Standard Features:



Function: Allows communication between third-party air handling units and LG air

source and water source units



Can connect with one AHU (one DX Coil) and cannot connect with indoor units



Control Options: LG Wired Controller (required for LG Controls), LG Central Controller,

3rd Party AHU Controller



VRF-WP-AH-001-US1018

System Compatibility: Heat Pump



AHU Coil Capacities 12 – 594 kBtu/h for Multi V and 5 – 85 kBtu/h for Single Zone (41°F

minimum entering air temp)



3 Thermistors (Pipe in, pipe out, and return air. 16.4 ft. length each)

Due to our policy of continuous product innovation, some specifications may change without notification

Figure 6. PAHCMS000 Contents

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DDC (3rd party)

Direct Control / Monitoring through

Dry Contact for Modbus

Dry Contact for Thermostat

Additional dry contacts are not required

EEV Kit



EEV Control



Designed for indoor installation (field-supplied waterproof enclosure required for

outdoor installation)



Requires 208-230 VAC, 1 phase power

Communication Kit Features



Dry contact function is embedded in the communication kits



Modbus Communication is possible without applying extra devices

AI/DI/DO or Modbus Communication



Multiple DX coil installation is possible for discharge air control

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S/W name

Item

Setting

Note

SW1

ODU Type

Single Comm.

Using Single Split outdoor unit

Off

MULTI V Comm.

Using MULTI V outdoor unit

Control Type

Communication

Controlled by DDC through Modbus and LG centralized controller

Off

Contact signal

Controlled by DDC through Contact signal (AI, DI) LG Centralized controller can only monitor status

DO Type

Fan Speed

DO1 : High, DO2 : Middle, DO3 : Low

Off

Status

DO1 : On/Off, DO2 : Defrost, DO3 : Alarm

Fan Speed

(TH. On/Off)

Fixed

Fan Speed doesn’t change when TH. On/Off

(Cooling/Heating)

Off

Change

Fan Speed change to LOW when Th. Off in Cooling Mode Fan Speed change to STOP when Th. Off in Heating Mode

SW2

Reserved - -

3/4

UI Setting

Off/Off

UI Setting #1

UI1 : Operation On/Off, UI2 : Heating/Cooling UI3 : Forced Thermo On/Off, UI4 : Target air temperature

Off/On

UI Setting #2

UI1 : Operation On/Off, UI2 : Cooling only/Off UI3 : Heating only/Off, UI4 : Forced Thermo On and Off

On/Off

Reserved

On/On

Reserved

SW3

Master/Slave

Slave mode

Please see “9.3 Multiple module installation guide” in the Installation Manual for more detail

Off

Master mode

Master mode is default for single AHU Controller installation. Please see “9.3 Multiple module installation guide” in the Installation Manual for more detail

2/3

Off/Off

Heat Pump

Cooling or Heating operation mode is available

DIP Switch: Communication Kits

DIP Switch Settings – PAHCMR000

Figure 7. DIP Switch – PAHCMR000

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Operation

Mode Setting

Off/On

Heating Only

Operation mode is Heating only (Heating / Fan)

On/Off

Cooling Only

Operation mode is Cooling only (Cooling / Fan)

On/On

Reserved

Reserved - -

SW4

1-4

Capacity

Index

Setting

According to ODU Type, you can setup the capacity index of MULTI V or Single Split

Table 2. Table of SW1 – SW4

NOTE: When coil entering air temperature is lower than 41oF, the following strategies can be used:



Preheat entering air with an ERV or heating coil



Mixed outdoor air with return air to raise the coil entering temperature



Add a gas furnace or electric heating section to the AHU to provide heat in lieu of the DX

coil

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Switch

Number

SW4 DIP

switches

Capacity (kBTU/h)

MULTI V

Single

Zone

115

134

153

172

Reserved

192

Reserved

Set DIP switch SW4 as appropriate for the capacity of your air handling unit.

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Table 3. Capacity Index

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DIP Switch Applications with Thermostats – PAHCMR000

The figure below shows the DIP switch settings of the return air comm. kit when the LG controls is used. When the LG controls method is used, an LG wired controller is required and LG central controller is optional.

Figure 8. Return Air Kit DIP Switch Application Using LG Thermostat

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The figure below shows the DIP switch settings for the return air comm. kit when a 3rd party thermostat is used. When a 3rd party thermostat is used, LG wired controller and LG central controllers are optional.

Figure 9. Return Air Kit DIP Switch Application Using 3rd Party Thermostat

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S/W name

Item

Setting

Note

SW1

Control Type

Communication

Controlled by DDC through Modbus or LG centralized controller

Off

Contact Signal

Controlled by DDC through Contact signal AI and DI LG Centralized controller can only monitor status

Discharge Temp.

Control Type

Stand alone

Discharge temp. control by LG controller using own discharge temp. sensor

Off

Manual by DDC

Discharge temp. control by DDC using field supplied discharge temp. sensor

Defrost

Operation Type

Normal

In case of multiple outdoor units, Defrost operation can be operated simultaneously

Off

Sequential

Start up

In case of multiple outdoor units, the outdoor unit is sequentially started at intervals of 10 minutes

Central

Communication

Type

LG Central Comm

Modbus Communication

Off

Not Used

SW2

ODU Capacity

Control

(1)

ODU Capacity Setting #2

ODU capacity control #2

Off

ODU Capacity Setting #1

ODU capacity control #1

Reserved - -

Reserved

SW3

Reserved - -

Reserved

Reserved - -

SW4

Reserved - -

DIP Switch Settings – PAHCMS000

Figure 10. Main Module DIP Switches

Notes: (1) Refer to the Installation Manual for ODU Capacity Controls

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Table 4. Main Module DIP Switch Settings

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S/W name

Item

Setting

Note

SW1

ODU Type

Single Comm

Using Single Split outdoor unit

Off

Multi V Comm

Using Multi V outdoor unit

Control Type

Communication

Controlled by Modbus between modules

Off

Contact signal

Not used

DO Type

Fan Speed

Not used

Off

Status

Not used

Fan Speed

(TH. On/Off)

Fixed

Not used

Off

Change

Not used

SW2

Reserved - -

3/4

UI Setting

(1)

Off/Off

UI Setting #1

Not used

Off/On

UI Setting #2

Not used

On/Off

On/On

SW3

Master/Slave On

Slave mode

Not used

Off

Master mode

Master is default

2/3

Operation mode

setting

Off/Off

Heat Pump

Cooling or Heating operation mode is available

Off/On

Heating Only

Operation mode is Heating only (Heating/Ventilation)

On/Off

Cooling Only

Operation mode is Cooling only (Cooling/Ventilation)

On/On

Reserved

Reserved - -

SW4

1-4

Capacity Index

Setting

According to ODU Type, you can setup the capacity index of Multi V or Single Split

Figure 11. Communications Module DIP Switches

Notes: (1) Refer to the Installation Manual for UI settings

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Table 5. Communications Module DIP Switch Settings

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Note: Outdoor unit central control address must be set to “01”

DIP Switch Application with Thermostats – PAHCMS000

Figure 12. Supply Air Kit Application Using 3rd Party Controller (Main Module)

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Note: Outdoor unit central control address must be set to “01”

Figure 13. Supply Air Kit Application Using 3

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Party Controller (Comm. Module)

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Model

Single Split

Capacity Index

kBtu/h

Communication Kit

PAHCMR000

O O O O O O PAHCMS000

X X O O X

Model

Multi V

Multi V Water

III S IV

Mini

Communication

Kit

PAHCMR000

O O O O O O O

PAHCMS000

O O O O O O X

Comm Kit Combinations

Combination Options

Table 6. Compatibility with Outdoor Units

Table 6 shows the compatibilities of the communication kits with different outdoor units. The return air communication kit (PAHCMR000) is compatible with Multi V 5, IV, III, S, Multi V Water IV, II and Mini. The supply air communication kit (PAHCMS000) is compatible with Multi V 5, IV, III, S, Multi V Water IV and II. The supply air communication kit is not compatible with Multi V Water Mini. The table also presents the compatibilities of the communication kits with Single Split models of different capacities.

Figure 14. Communication Kit Combination

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1:1 Combination

EEV Kit Combinations

1:2 Combination

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PRLK048/096A0 + PRLK396/594A0 Combination – Not Possible

 PRLK048/096A0 + PRLK396/594A0 combination is not allowed

o PRLK048A0 + PRLK396A0 o PALK048A0 + PRLK594A0 o PRLK096A0 + PALK396A0 o PRLK096A0 + PRLK594A0

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PRLK594A0 + PRLK594A0 Combination – Not Possible

 PRLK594A0 + PRLK594A0 combination is not allowed

PRLK396A0 + PRLK594A0 Combination – Not Possible

 PRLK396A0 + PRLK594A0 combination is not allowed

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Combination

Total

AHU

Indoor units

Expansion kit type

Pair

(1 ODU to 1 AHU)

90 - 105%

-105% - EEV kit

Multiple

(1 ODU to multiple AHUs)

90 - 110%

-110% - EEV kit

Multiple (1

ODU to multiple AHUs +

indoor units)

50 - 110%

-50%

50 - 110%

EEV kit

50 - 130%

-30%

50 – 130%

EEV kit

EEV + IDU Combination – Not Possible

 PRLK396/594A0 + Indoor Unit combination is not allowed

EEV Kit Combination Ratio

• Heat pump system

Note: 1. Combination ratio (%) = Sum of total capacity index / Outdoor unit rated cooling capacity

2. A DX coil capacity should be less than or equal to 100% of the outdoor unit capacity

Table 7. EEV Kit Combination Ratio for Heat Pump System

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Application Cases for Communication Kits

Return Air Control – 1-ODU System + 1 AHU (1 coil) + Controls

LG thermostats with AHU conversion kit can only do single setpoint

LG thermostats with AHU conversion kit cannot do auto switchover mode

1. 1-ODU System + 1 AHU (1 coil) + LG Control



1 ODU can be connected with multiple EEV kits



EEV kit should be connected with communication kit 1:1

2. 1-ODU System + 1 AHU (1 coil) + DDC (Modbus)



1 ODU can be connected with multiple EEV kits



EEV kit should be connected with communication kit 1:1



LG Remote Controller and LG Central Controller are optional

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Return Air Control – 1-ODU System + 1 AHU (2 coil) + Controls

LG thermostats with AHU conversion kit can only do single setpoint

LG thermostats with AHU conversion kit cannot do auto switchover mode

1. 1-ODU System + 1 AHU (2 coils) + LG Control



1 ODU can be connected with multiple EEV kits



1 Communication kit & 1 EEV kit are necessary for each coil



Group control of coils is needed normally

2. 1-ODU System + 1 AHU (2 coils) + DDC (Modbus)



1 ODU can be connected with multiple EEV kits



1 communication kit & 1 EEV kit are necessary for each coil



Group control of coils is need normally

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Return Air Control – 1-ODU System + 1 AHU (1 coil) + IDU + Controls

*LG thermostats with AHU conversion kit can only do single setpoint LG thermostats with AHU conversion kit cannot do auto switchover mode

1. 1-ODU System + 1 AHU (1 coil) + Indoor Units + LG Control



1 ODU can be connected with multiple EEV kits



EEV kit can be used with other indoor units



1 communication kit & 1 EEV kit are necessary for each coil

2. 1-ODU System + 1 AHU (1 coil) + Indoor Units + DDC (Modbus)

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

1 ODU can be connected with multiple EEV kits



EEV kit can be used with other indoor units



1 communication kit & 1 EEV kit are necessary for each coil

Return Air Control – 1-ODU System + 1 AHU (2 coil) + IDU + Controls

LG thermostats with AHU conversion kit can only do single setpoint

LG thermostats with AHU conversion kit cannot do auto switchover mode

1. 1-ODU System + 1 AHU (2 coils) + Indoor Units + LG Control



1 ODU can be connected with multiple EEV kits



EEV kit can be used with other indoor units



1 communication kit & 1 EEV kit are necessary for each coil

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2. 1-ODU System + 1 AHU (2 coils) + Indoor Units + DDC (Modbus)



1 ODU can be connected with multiple EEV kits



EEV kit can be used with other indoor units



1 communication kit & 1 EEV kit are necessary for each coil

Return Air Control – 1-ODU System + Multiple AHU’s + Controls

LG thermostats with AHU conversion kit can only do single setpoint

LG thermostats with AHU conversion kit cannot do auto switchover mode

1. 1-ODU System + Multiple AHU’s + LG Control

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

1 ODU can be connected with multiple EEV kits



EEV kits can be used with other indoor units



1 communication kit & 1 EEV kit are necessary for each coil

2. 1-ODU System + Multiple AHU’s + DDC (Contact)



1 ODU can be connected with multiple EEV kits



EEV kits can be used with other indoor units



1 communication kit & 1 EEV kit are necessary for each coil



LG Remote Controller and LG Central Controller can be used for monitoring only

3. 1-ODU System + Multiple AHU’s + DDC (Modbus)



1 ODU can be connected with multiple EEV kits

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

EEV kits can be used with other indoor units



1 communication kit & 1 EEV kit are necessary for each coil

Return Air Control – 2-ODU System + 1 AHU (2 coils) + Controls

*LG thermostats with AHU conversion kit can only do single setpoint LG thermostats with AHU conversion kit cannot do auto switchover mode

1. 2-ODU System + 1 AHU (2 coils) + LG Control



1 ODU can be connected with multiple EEV kits



1 communication kit & 1 EEV kit are necessary for each coil

2. 2-ODU System + 1 AHU (2 coils) + DDC (Modbus)



1 ODU can be connected with multiple EEV kits

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

1 communication kit & 1 EEV kit are necessary for each coil

Supply Air Control – 1-ODU System + 1 AHU (1 coils) + Controls

1. 1-ODU System + 1 AHU (1 coil) + DDC (Contact)



DDC controls ODU capacity through the communication kit to meet required

discharge air temperature



party discharge thermistor is required to feedback ODU capacity to the

communication kit



LG Central Controller is connected directly to the communication kit, not to ODU



Multi V ODU and communication kit (right side module) address should match for

capacity control and can only be set as “00”, “01”, “02”, “03”



LG Remote Controller and LG Central Controller can be used for monitoring only



LG Central Control address must match Communication Kit (left side module) address

which can be set using communication kit Tact buttons

2. 1-ODU System + 1 AHU (1 coil) + DDC (Modbus)

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

With Modbus control, discharge air can be controlled in 2 methods

1) ODU Capacity Control (3rd party discharge thermistor is required)

a) DDC controls ODU capacity through communication kit to meet required discharge air temperature b) 3rd party discharge thermistor is required to feedback ODU capacity to communication kit



LG Central Controller is connected directly to the communication kit, not to ODU



Multi V and communication kit address should be kept as “00” (default “00”)



Multi V ODU and communication kit (right side module) address should match for

capacity control and can only be set as “00”, “01”, “02”, “03”



LG Central Control address must match Communication Kit (left side module) address

which can be set using communication kit Tact buttons

Supply Air Control – 1-ODU System + 1 AHU (2 coils) + Controls

1. 1-ODU System + 1 AHU (2 coils) + DDC (Contact)

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

LG Central Controller is connected directly to communication kit (PAHCMS000), not to

ODU



EEV kits should be connected with communication kits 1:1



Additional PAHCMR000 can be connected to expand the number of DX coil. Maximum

of 3 return air communication kits can be used for 1 supply air communication kit – maximum applicable DX coil for 1 ODU system is 4



LG Remote Controller and LG Central Controller can be used for monitoring only



Multi V ODU and communication kit (right side module) address should match for

capacity control and can only be set as “00”, “01”, “02”, “03”



LG Central Control address must match Communication Kit (left side module) address

which can be set using communication kit Tact buttons

Supply Air Control – 1-ODU System + Multiple AHU’s

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

For supply air control, single connection without another IDU or AHU is recommended

: Supply air temperature control kit adjusts pressure (or AHU coil temperature) so 2 AHU’s have the same coil temperature



It is not possible to have different coil temperatures

Supply Air Control – 1-ODU System + 1 AHU (1 coil) + IDU’s



For supply air control, single connection without another IDU or AHU is recommended

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: Supply air temperature control kit adjusts pressure (or AHU coil temperature)



IDU capacity could be changed when supply air control kit controls AHU

Supply Air Control – 1-ODU System + 1 AHU (2 coils) + IDU’s



For supply air control, single connection without another IDU or AHU is recommended

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: Supply air temperature control kit adjusts pressure (or AHU coil temperature)



IDU capacity could be changed when supply air control kit controls AHU

Supply Air Control – 2-ODU System + 1 AHU (2 coils)

1. 2-ODU System + 1 AHU (2 coils) + DDC (Contact)



LG Central Controller is connected directly to the communication kit (PAHCMS000),

not to ODU



EEV kits should be connected with communication kits 1:1

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

Additional PAHCMR000 can be connected to expand the number of DX coil. Maximum

of 3 return air communication kits can be used for 1 supply air communication kit – maximum applicable DX coil for 1 ODU system is 4



LG remote controller and LG central controller can be used for monitoring only



Multi V ODU and communication kit (right side module) address should match for

capacity control and can only be set as “00”, “01”, “02”, “03”



LG Central Control address must match Communication Kit (left side module) address

which can be set using communication kit Tact buttons

Supply Air Control – 1-ODU System + 1 AHU (2 coils) + I/O Module + DDC Control



I/O Modules (PRVC2 and PWFCKN000) have capacity control feature built-in

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

LG Central controller can be connected to ODU

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Example AHU Kit for Large AHU

Components Required



LG Wired Controller



PAHCMS000 Communication Kit (Supply Air)



EEV Kit



Multi V ODU



3rd Party AHU

Selecting in LATS HVAC

When creating your LATS HVAC project, make sure to choose a Multi V Outdoor Unit. Note that PAHCMS000 Units are only compatible with Heat Pump systems.

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When selecting an indoor

Unit, choose “EEV Kit” under

IDU Type.

PRLK048A0, PRLK096A0,

PRLK396A0 and PRLK594A0

are available EEV kit choices

After selecting the EEV Kit, click on

“Accessories” to add the Comm. Kit

and thermostat

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Choose the PAHCMS000 as the

communication kit and one of the

LG wired controllers, then click

“Add” and “Ok”. Note that the

thermostat is used for displaying

error codes only when DDC by

contact signal is used

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Here’s an example of a Large AHU system in LATS HVAC. The combination ratios in Table 6 should be followed when designing with the AHU kits.

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Application Types

Figure 15. VAV/Central Station Air Handler

Figure 16. Rooftop Air Handler

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Figure 17. Custom Air Handler

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Outdoor Unit

Indoor Units

Controller

MV-V Water IV HP

(64 Tons)

33,000 CFM AHU x 1

3rd Party BMS

• PAHCMS000 Comm. Kit for outside air pre‐conditioning to meet

specific discharge air temperature.

• MV‐Water IV units mounted, piped, and wired at AHU

manufacturer.

Application Examples

Office Building

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AHU Conversion Kit for Small AHU

Components Required



PAHCMR000 Communication Kit (Return Air)



EEV Kit



Multi V ODU



LG wired controller



3rd Party AHU

Selecting in LATS HVAC

When creating your LATS-HVAC project, make sure to choose a Multi V Outdoor Unit. Note that both PAHCMR000 and PAHCMS000 units are compatible with both Heat Recovery and Heat Pump systems.

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After selecting the EEV Kit, click on

“Accessories” to add the Comm. Kit

and thermostat

When selecting an indoor

Unit, choose “EEV Kit” under

IDU Type.

For Heat Recovery systems,

only PRLK48A0 can be used.

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Choose the PAHCMR000 as the

communication kit and one of the LG

wired controllers, then click “Add” and

“Ok”.

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Here’s an example of a Small AHU system in LATS-HVAC. The combination ratio should follow the rules in the combination ratio table (Table 6).

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Application Types

Figure 18. High Filtration

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Figure 19. Large Gym Area

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Outdoor Unit

Indoor Units

Controller

MV 5 HR

(28 Tons)

3700 CFM AHU x 1

Ducted x 9

High Wall x 3

AC Smart IV

• PAHCMR000 Comm. Kit for outside air pre‐conditioning.

• Standard LG IDU used for space conditioning.

• AC Smart Central Controller schedules LG systems. 3

Party BMS controls

AHU fan speed.

Application Examples

Restaurant

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Outdoor Unit

Indoor Units

Controller

MV Water IV HR

MV Water IV HP

MV 5 Air HR

(128 Tons)

Ducted x 21

High-Wall x 1

12,000 CFM AHU x 1

BMS &

3rd Party Thermostat

• VRF equipment replacing WSHP to reduce site maintenance costs

and reduce classroom noise.

• PAHCMR000 Comm. Kit applied to Gym/Multipurpose Space AHU.

• LG AHU Kits installed and piped at AHU factory.

Elementary/High School

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Coil Design Parameters

AHU Module – Design Tips (Do’s)



Minimum coil entering temperature is 41°F for heating mode.



AHU coil sizing parameters

• Cooling Mode ◦ Suction (evap) temperature for coil sizing is 41 - 43°F ◦ Condensing (liquid) temperature for coil sizing is 110°F

• Heating Mode

◦ Hot gas temperature at AHU coil is 113°F (range is 104 - 122°F) ◦ Recommended coil tube sizes are 3/8” or 1/2" ◦ Refrigerant pressure drop is 7.25 psi to 14.5 psi ◦ Coil volume data is needed from coil manufacturer to calculate refrigerant trim

charge amount

◦ Coils larger than 42 tons should be divided into multiple circuits to allow

connection of EEV kit ◦ Heat recovery systems are limited to 8 ton maximum coil size (can only tie 2

HRU ports together)



Pipe sizing rules are same rules as the connected ODU (see ODU Engineering Manual or

updated LATS version)



Maximum recommended combination ratio is 100%



Comm Kits and EEV Kits are not weather proof and must be protected from rai, snow,

etc.

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AHU Module – Design Tips (Dont’s)



Do not design AHU coil

• Rows, fins per inch, coil area, coil velocity are determined by coil manufacturer or

specifying engineer



Do not directly connect AHU fan motor (load) to AHU Comm Kit

• Fan motor control center (relays or starter) is required



Do not exceed outdoor design temperature limits for outdoor units

• 14°F minimum outdoor temperature for simultaneous operation of Multi V 5

• 60°F maximum on heating mode



Avoid using (1) cooling coil and (1) heating coil for reheat in same AHU (control setup is

very complicated)



Do not exceed air velocity of 550 FPM (feet per minute) to avoid blow off of condensate

water into airstream

AHU Module DX Coil Sizing Parameters – Cooling

Superheat (Cooling Mode) = Th3 (pipe out temperature) – Th2 (pipe in temperature) = 7F

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AHU Module DX Coil Sizing Parameters – Heating

Subcooling (Heating mode) = SCT – Leaving Liquid Temperature (Th2) = 9F

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Circuit Diagram

Supply Air Communication Kit - PAHCMS000

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Return Air Communication Kit - PAHCMR000

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LG AHU Conversion Application Guide

Specifications and Main Features

Frequently Asked Questions

User Manual