Ahu Kit Introduction - LG PAHCMR000 Installation Manual

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Installation manual (47 pages)

Service manual (18 pages)

Owners & installation manual (7 pages)

Table Of Contents

Table of Contents

Introduction

The PAHCMR000 AHU Communications Kit bridges LG's air conditioning outdoor unit to a third party Air

Handling Unit (AHU). Its function is based on the return air temperature control. In installations where

the AHU is designed with Direct Expansion (DX) Coil, the PAHCMR000 will control the return air tem-

perature by measuring the inlet and outlet temperatures of the DX coil and changing the operation of the

outdoor unit and the expansion unit. PAHCMR000 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 - 396 kBtu/h.

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

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

outdoor unit to secure the demanded return 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 PAHCMR000 AHU Communications Kit consists of a chassis, communication module, pipe-in

thermistor, pipe-out thermistor, and room (return) air thermistor.

Figure 2: AHU Communications Kit System Schematic.

Return Air

Thermistor

3rd Party

Air Handling

Unit

AHU Comm Kit

PAHCMR000

Pipe In

Sensor

(Liquid)

Air ﬂow

Pipe Out

Sensor (Vapor)

Control Signal (field supplied)

Thermistor Signal

LG wired controller is required.

Compatible units are Multi V and Single Zone.

Compatible central controllers are AC Smart IV and ACP IV.

* BACnet

is a trademark of ASHRAE; LonWorks

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