LG PAHCMS000 Manuel utilisateur

INSTALLATION MANUAL

FOR LG AIR HANDLER UNIT (AHU)

COMMUNICATIONS KIT

AHU Model Number: PAHCMS000

For continual product development, LG Electronics U.S.A., Inc. reserves the right to change specifications without notice.

PROPRIETARY DATA NOTICE

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LG Electronics U.S.A., Inc., and are disclosed by LG Electronics U.S.A., Inc. only in confidence.

For more materials such as submittals, catalogs, engineering,

installation, owner’s, and service manuals, visit www.lghvac.com.

Do not throw away, destroy, or lose this manual.

Please read carefully and store in a safe place for future reference.

Content familiarity required for proper installation.

The instructions included in this manual must be followed to prevent product malfunction, property damage, injury, or death to the user or

other people. Incorrect operation due to ignoring any instructions will cause harm or damage. The level of seriousness is classified by the

symbols described by the summary list of safety precautions on page 3.

3

Due to our policy of continuous product innovation, some specications may change without notication.

TABLE OF CONTENTS

Safety Precautions ..........................................................................................................................................................................4

AHU Kit Introduction.......................................................................................................................................................................7

Specications, Components List...................................................................................................................................................8

AHU Communications Kit Installation...........................................................................................................................................9

Selecting the Best Location��9

DIP Switch Settings ��10

AHU Communications Kit Parts ��13

AHU Communications Kit Mounting ��14

Power Wiring ��18

Communications Wiring��19

Controller Settings��20

Solutions Overview��24

Main Module Settings��27

Communication Module��31

Defrost Setting��32

External Connection Diagrams��33

Discharge Air Temperature Controller��37

EEV Kit Installation........................................................................................................................................................................45

Introduction, Specications, and Design Parameters��45

EEV Kit Parts��46

Mounting the EEV Kit ��48

Preparing the Pipes��49

Brazing and Insulating the Piping��50

PRLK048A0 and PRLK096A0 Wiring��51

PRLK396A0 Wiring��52

Control Functions ��53

Testing ............................................................................................................................................................................................57

Troubleshooting ............................................................................................................................................................................58

4

PRDCAM AHU Communication Kit Installation Manual

Due to our policy of continuous product innovation, some specications may change without notication.

TABLE OF SYMBOLS

This symbol indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury�

This symbol indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury�

This symbol indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury�

This symbol indicates situations that may result in equipment or property damage accidents only�

This symbol indicates an action should not be completed�

DANGER

CAUTION

The instructions below must be followed to prevent product malfunction, property damage, injury or death to the user or other people. Incor-

rect operation due to ignoring any instructions will cause harm or damage. The level of seriousness is classified by the symbols described

below.

Installation

All electrical work must be performed by a licensed electri-

cian and conform to local building codes or, in the absence

of local codes, with the National Electrical Code, and the

instructions given in this manual.

If the power source capacity is inadequate or the electric work is not

performed properly, it may result in re, electric shock, physical injury or

death�

Do not touch the communications and EEV kits’ wir-

ing, terminals, or other electrical components with tools or

exposed skin when the power is connected. Only qualied

technicians should install, remove, or re-install the kits.

Improper installation or use may result in re, electric shock, physical

injury or death�

Do not install, remove, or re-install the communications

and EEV kits by yourself (end user). Ask the dealer or a qual-

ied technician familiar with safety procedures and equipped

with the proper tools and test instruments to install the kits.

Improper installation by the user may result in re, electric shock, physi-

cal injury or death�

For replacement of an installed communications and EEV

kits, always contact a qualied LG service provider familiar

with safety procedures and equipped with the proper tools

and test instruments.

There is risk of re, electric shock, and physical injury or death.

Do not install the communications and EEV kits in a loca-

tion where the kits can be exposed to rain, snow, etc.

There is risk of physical injury or death due to electric shock�

Safely dispose of the packing materials.

Tear apart and throw away plastic packaging bags so that children may

not play with them and risk suffocation and death�

Wear protective gloves when unpacking, installing, and han-

dling the kits. Sharp edges may cause personal injury.

Do not install the communications and EEV kits in loca-

tions where either kit could fall down.

There is risk of physical injury�

Use the appropriate parts and connectors.

There is risk of physical injury or death due to re and / or electric shock.

Replace all control box and panel covers on the communica-

tions and EEV kits.

If cover panels are not installed securely, dust, water, and animals may

enter the kits, causing re, electric shock, and physical injury or death.

Failure to carefully read and follow all instructions in this

manual can result in physical injury or death.

Only qualied technicians familiar with safety procedures

and equipped with the proper tools and test instruments

should install, remove, or re-install the communications and

EEV kits.

Improper installation or use may result in product malfunction�

Do not install the communications and EEV kits in a

location where the kits can be exposed to rain, snow, etc.

There is risk of product malfunction�

Do not drop the communications and EEV kits.

It may damage the products�

Failure to carefully read and follow all instructions in this

manual can result in property damage and equipment mal-

function.

SAFETY PRECAUTIONS

5

Safety Precautions

Due to our policy of continuous product innovation, some specications may change without notication.

SAFETY PRECAUTIONS

Do not supply power to the communication and EEV kits

until all electrical wiring, controls wiring, piping, installation,

and refrigerant evacuation are completed for the whole air

conditioning system.

The information contained in this manual is intended for use

by an industry-qualied, experienced, certied electrician

familiar with the U.S. National Electric Code (NEC) who is

equipped with the proper tools and test instruments.

Failure to carefully read and follow all instructions in this manual can

result in equipment malfunction or property damage�

The information contained in this manual is intended for use

by an industry-qualied, experienced, certied electrician

familiar with the U.S. National Electric Code (NEC) who is

equipped with the proper tools and test instruments.

Failure to carefully read and follow all instructions in this manual can

result in personal injury or death�

All electric work must be performed by a licensed electrician

and conform to local building codes or, in the absence of

local codes, with the National Electrical Code, and the

instructions given in this manual.

If the power source capacity is inadequate or the electric work is not

performed properly, it may result in re, electric shock, physical injury or

death�

Refer to local, state, and federal codes, and use power wires

of su󰀩cient current capacity and rating.

Wires that are too small may generate heat and cause a re and physi-

cal injury or death�

Secure all eld wiring connections with appropriate wire

strain relief.

Improperly securing wires will create undue stress on equipment power

lugs. Inadequate connections may generate heat, cause a re and

physical injury or death�

Verify that all power wiring, plugs, and sockets are not loose

or damaged.

Loose wiring may overheat at connection points, causing a re, electrical

shock, physical injury or death�

WIRING

DANGER

High voltage electricity is required to operate the commu-

nications and EEV kits. Adhere to the NEC code and these

instructions when wiring.

Improper connections and inadequate grounding can cause accidental

injury or death�

Always ground the communications and EEV kits following

local, state, and NEC codes.

There is risk of re, electric shock, and physical injury or death.

Turn the power o󰀨 at the nearest disconnect before servicing

the equipment.

Electrical shock can cause physical injury or death�

Properly size all circuit breakers or fuses.

There is risk of re, electric shock, explosion, physical injury or death.

Communication kit requires its own power source (EEV kit

is powered o󰀨 of Communication kit). Do not share the

power source with other equipment.

There is risk of heat generation which may cause re, electric shock,

explosion, physical injury or death�

6

PRDCAM AHU Communication Kit Installation Manual

Due to our policy of continuous product innovation, some specications may change without notication.

Do not install the communications and EEV kits in loca-

tions exposed to open ame or extreme heat. Do not touch

the kits with wet hands.

There is risk of re, electric shock, physical injury or death.

Do not modify or extend the power supply cords.

There is risk of re, electric shock, physical injury or death.

Do not step or place anything on the communications

and EEV kits.

If the product falls, there is risk of physical injury�

Do not place heavy objects on the communications and

EEV kits’ power cables.

There is risk of re, electric shock, physical injury or death.

Only authorized persons should operate the communications

and EEV kits.

If the kits are not operated properly, there is a risk of physical injury�

Do not provide power to or operate communication and

EEV kits if the kits are ooded or submerged. Always have

the dealer or an authorized technician to service the kits.

There is risk of re, electric shock, physical injury or death.

Do not store or use ammable gas or combustibles near

the communications and EEV kits.

There is risk of re, explosion, and physical injury or death.

Unplug the communication and EEV kits if either kit emits

strange sounds, smells, or smoke.

There is risk of re, electric shock, physical injury or death.

Do not let the communication and EEV kits get wet.

There is risk of product failure or malfunction�

Only authorized persons should operate the communication

and EEV kits.

There is risk of product failure or malfunction�

Do not drop the communications and EEV kits.

There is risk of product failure or malfunction�

Do not step or place anything on the communications

and EEV kits.

If the product falls, there is risk of product damage�

OPERATION

DANGER

CAUTION

SAFETY PRECAUTIONS

7

General Specifications

Due to our policy of continuous product innovation, some specications may change without notication.

AHU KIT INTRODUCTION

Figure 1: PAHCMS000 AHU

Communications Kit.

Figure 2: AHU Communications Kit System Schematic.

Introduction

The PAHCMS000 AHU Communications Kit bridges LG’s air conditioning outdoor unit to a third party Air

Handling Unit (AHU). Its function is based on discharge or supply air temperature control. In installations

where the AHU is designed with Direct Expansion (DX) Coil, the PAHCMS000 will control the supply air

temperature by measuring the inlet and outlet temperatures of the DX coil and changd the operation of

the outdoor unit and the expansion unit. PAHCMS000 AHU Communications Kit features are:

• It can be used with LG Multi V air or water source outdoor units and LG Single Zone outdoor units.

• It supports AHU coil capacities from 12 - 594 kBtu/h.

• It controls the Electronic Expansion Valve (EEV, required, sold separately)

• It measures the supply air temperature through the enclosed temperature sensor and controls the

outdoor unit to secure the demanded supply air temperature.

• It can be directly connected to direct digital control (DDC) without a separate control module, so DDC

can receive product control and status information through Modbus communication.

• The PAHCMS000 AHU Communications Kit consists of a chassis, communication module, pipe-in

thermistor, pipe-out thermistor, and return air thermistor.

• Supply air temperature control is possible without DDC.

• It increases heating comfort by applying sequential defrost logic and simultaneous defrosting preven-

tion logic of the outdoor unit.

Control Signal (field supplied)

Pipe

Thermistor Signal

Refrigerant ﬂow (cooling)

Refrigerant ﬂow (heating)

LG Wired

Controller2

Third-Party

AHU

Controller1

Air ﬂow

LG AHU

EEV Kit

Third-Party

Air Handling

Unit

LG Multi V

Air Source or

Water Source Unit4

1Third-party AHU controller is recommended.

2LG wired controller (required accessory) functions as error code display only.

No system control available.

3Return air temperature thermistor can be replaced with fixed resistor when AHU

controller is using third-party temperature sensors.

4Compatible units are Multi V and Single Zone.

Return Air

Thermistor3

Max

Length

32 feet

LG AHU

Comm Kit

PAHCMS000

Vapor

Piping

Liquid

Piping

Pipe Out

Sensor (Vapor)

Pipe In

Sensor

(Liquid)

8

PRDCAM AHU Communication Kit Installation Manual

Due to our policy of continuous product innovation, some specications may change without notication.

Specifications

Table 1: PAHCMS000 AHU Communications Kit Specications Table.

AHU Communications Kit Components

Table 2: PAHCMS000 AHU Communications Kit Components Table (factory supplied).

Kit Model Number PAHCMS000

For Use With Multi V and Single Zone

Power Supply Requirements 208-230VAC, 60Hz, 1Ph

Rated Current 0.1A

Ambient Operating Temperature Range -4 to +149°F

Ambient Operating Humidity Range 0 to 98% (Non-condensing)

Dimensions (in., W x H x D) 14-31/32” W x 6-3/32” H x 11-13/16” D

Net Weight (lbs.) 16.5

Shipping Weight (lbs.) 19.4

Communications RS-485 (4 wires required: 2 connect to IDU A/B terminals and 2 connect to UI4/G terminals on ODU)

Communications Cable AWG 18 x 4 Stranded, Shielded Copper Cable

Part Quantity Image

AHU

Communications Kit One (1)

Return Air (Room)

Thermistor One (1)

Pipe Thermistor

Two (2)

(One [1] Pipe In,

One [1] Pipe Out)

AHU COMMUNICATIONS KIT SPECIFICATIONS,

COMPONENTS LIST

9

Installation

Due to our policy of continuous product innovation, some specications may change without notication.

AHU Communications Kit Design Parameters

• Minimum coil entering air temperature is 41°F when system is operating in heating mode.

• AHU coil sizing parameters:

• Suction (evaporating) temperature for coil sizing is 41°F, Condensing (liquid) temperature for coil sizing is 110°F.

• Recommended coil tube sizes: 3/8 or 1/2 inches.

• Coil volume is needed to calculate additional refrigerant charge amount.

• Coils larger than 16 tons should be divided into multiple circuits to allow EEV Kit connection kit (EEV Kit sold separately).

• Pipe sizing rules are same rules as the connected air-source or water-source heat pump (see respective Engineering and Installation

Manuals for more information).

• Maximum recommended combination ratio is 100%.

• AHU Communications Kits and EEV Kits (sold separately) are not weatherproof and must be protected from rain, snow, etc.

AHU COMMUNICATIONS KIT INSTALLATION

Selecting the Best Location

AHU Operation Range

Range of the heat exchanger inlet air temperature is 64.4 to 104°F for cooling, and 41 to 86°F for heating. If the temperature is <64.4°F

for cooling and >86°F for heating, the system might cycle on and off because of the system’s protection logic.

Application Condition

100% outside air intake: The AHU(s) is (are) the only indoor unit(s)

connected to the air-source / water-source heat pump unit(s).

The total capacity of 100% outside air intake AHU(s) should be

50~100% of the air-source / water-source heat pump.

To measure room temperature accurately, install the room thermistor in the heat exchanger inlet� If the room thermistor is not installed

properly, the AHU may not operate properly. Room thermistor can be replaced with xed resistor when using a third-party AHU controller.

Table 3: AHU Application and Condition.

Selecting the Best Location

Do

• Install the AHU Communications and EEV Kits with the access panels facing outward.

• Install in a location that can support the weight of the kits.

• Install the EEV kit on the AHU as close as possible to the heat exchanger.

Don’t

• Don’t install or operate the unit in an area where mineral oils, sulphuric gases, acidic or alkaline vapors or spray are present.

• Don’t install in an area where the air contains high levels of salt (oceanside locations).

• Don’t install in vehicles or vessels.

• Don’t install in an area where voltage fluctuates significantly (factories), or near machines that generate electromagnetic waves.

10

PRDCAM AHU Communication Kit Installation Manual

Due to our policy of continuous product innovation, some specications may change without notication.

Communication Module

Main Module

The default setting of all DIP switches is “off”

etoNgnitteSmetIoNemanW/S

SW1

1 Control Type

On 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

2Discharge Temp.

Control Type

On Stand alone Discharge temp. control by LG controller using own discharge

temp. sensor

Off Manual by DDC Discharge temp. control by DDC using filed supplied discharge

temp. sensor

3Defrost Operation

Type¹

On Normal In case of multiple outdoor units, Defrost operation can be oper-

ated simultaneously

Off Sequential

Start up

In case of multiple outdoor units, the outdoor unit is sequentially

started at intervals of 10 minutes

4

Central

Communication

Type

On LG Central Comm Modbus Communication

Off - Not Used

SW2

1ODU Capacity

Control

On ODU Capacity

Setting #2 ODU capacity control #2

Off ODU Capacity

Setting #1 ODU capacity control #1

---devreseR2

---devreseR3

---devreseR4

SW3

---devreseR1

---devreseR2

---devreseR3

---devreseR4

SW4

---devreseR1

---devreseR2

---devreseR3

---devreseR4

Note:

1. Function of defrost operation type can be applied only to Multi V outdoor units (after MULTI V 5 model).

Figure 3: Main Module DIP Switches.

Table 4: Main Module DIP Switch Settings

AHU COMMUNICATIONS KIT INSTALLATION

DIP Switch Settings

LG PAHCMS000 Manuel utilisateur

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