LG ARNU363DDA4 User manual

POWER EXHAUSTER FOR
SPLIT ROOFTOP UNITS (RTU) 3 TO 6 TONS
INSTALLATION MANUAL
Vertical or Horizontal Applications
Compatible Models:
ARNU363DDA4, ARNU483DDA4,
ARNU603DDA4, ARNU723DDA4
Accessory Model Numbers:
Power Exhauster, Dry Bulb Modulating: ZCPE03050DB
Power Exhauster, Single Enthalpy: ZCPE03050SE
Power Exhauster, Dual Enthalpy: ZCPE03050DE

For continual product development, LG Electronics U.S.A., Inc. reserves the right to change specifications without notice.
© LG Electronics U.S.A., Inc.
PROPRIETARY DATA NOTICE
For more technical materials such as submittals, 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 is 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 4.
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.

3
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. 3
TABLE OF CONTENTS
Introduction��������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 4
Safety Precautions ��������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 5
Product Data �������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 6-10
Unit Installation�������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 11-15
Actuator Removal���������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 16-19
Pulley Removal / Adjustment ��������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 20-23
Maintenance������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 24-25
Damper Test ������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������ 26
Wiring Diagrams������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������ 27-29

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Split Rooftop Unit Power Exhauster Installation Manual
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.
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.
This symbol indicates situations that may result in equipment or property damage accidents only.
This symbol indicates information related to the current procedure.
This symbol indicates an action that should not be performed.
Read these instructions completely before attempting to install the Power Exhauster Accessory.
NOTE
INTRODUCTION
Installation Supplement
JADE™Economizer with Power Exhaust used with LG Split Rooftop Units with 3D Plug Indoor Fan.
(JADE is a is a trademark of Honeywell International, Inc. or its subsidiaries or afiliates.)
In the event that this JADE W7220 economizer is used with an LG 3 to 6 ton rooftop unit with 3D Plug (Centrifugal) Fan, the harness provided with
the accessory kit must be eld-connected to the JADE W7220 economizer controller.
Kit Instructions:
1. Install the JADE W7220 controller and transformer in the unit control box, per economizer instructions. Do not connect wire.
2. Install the LG Dry Contact in the unit control box. The dry contact model names that should be used according to the type of thermostat
are as follows.
LG Dry Contact must be purchased separately.
Remote Controller Dry Contact Model No�
LG Thermostat PDRYCB400
Third-Party Thermostat PDRYCB320
Table 1: LG Dry Contacts.

5
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.
Introduction
SAFETY PRECAUTIONS
Safety Precautions
WARNING
Because of system pressure, electrical components, and the equipment, installation of this accessory may result in death or
serious injury. Only trained qualied installer and service technicians should install, start-up, and service this equipment.
When installing this accessory, observe precautions in the literature and on any labels attached to the equipment and all other
safety precautions may apply.
• Follow all safety codes.
• Wear safety glasses and work gloves.
• Use care in handling and installing the accessory.
WARNING
Electrical Shock Hazard
Before performing service or maintenance operations on the unit, always turn o󰀨 main power switch to unit and install lock(s)
and lockout tag(s). Unit may have more than one power switch. Ensure electrical service to rooftop unit agrees with voltage
and amperage listed on the unit rating plate.
Failure to follow this warning can cause personal injury or death.
CAUTION
Cut Hazard
• Failure to follow this caution could result in minor or moderate injury. Sheet metal parts may have sharp edges or burrs.
• Use care and wear appropriate protective clothing, safety glasses, and gloves when handling parts and servicing rooftop units.
CAUTION
Cover the duct opening as a pre-caution so individuals cannot fall into the return duct opening. Be sure to remove the cover
when installation is complete.
Failure to follow this caution may cause minor or moderate injury.
NOTE
Failure to follow this caution may result in damage to the unit. Cover the duct opening as a pre-caution so objects cannot fall into the return duct
opening. Be sure to remove the cover when installation is complete.

6
Split Rooftop Unit Power Exhauster Installation Manual
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.
General Product Data
The economizer system utilizes the latest technology available for integrating the use of free cooling with mechanical cooling for packaged
rooftop units. The code compliant JADE W7220 control system optimizes energy consumption, zone comfort, and equipment cycling by oper-
ating the compressors when the outdoor-air is too warm or humid, integrating the compressor with outdoor air when free cooling is available,
and locking out the compressor when outdoor-air temperature is too cold. Demand control ventilation is supported.
This economizer can be used with variable speed indoor fan motor units. (1 speed fan setup).
Economizer actuators are spring return for full 100% shutdown upon power loss. The economizer system comes standard with fault detec-
tion and diagnostics (FDD), an outdoor air sensor, and mixed air temperature sensor (also called supply air temperature sensor). Outdoor
enthalpy and CO2 sensors are available for field installation. See tables below and on the next page for sensor usage.
Standard integrated barometric relief dampers provide natural building pressurization control. This power exhaust system is available for
applications requiring even greater exhaust capabilities. Refer to LG’s other power exhaust documentation (example: submittals) for more
details. The power exhaust set point is adjustable at the economizer controller.
PRODUCT DATA
Accessory List
Table 2: Usage Chart.
Model Name Economizer Part No Thermostat Dry Contact
ARNU363DDA4
ARNU483DDA4
ARNU603DDA4
ARNU723DDA4
Single Dry Bulb OA Sensor
(ZCPE030505DB)
LG PDRYCB400
Third-Party PDRYCB320
Single Enthalpy OA Sensor
(ZCPE030505SE)
LG PDRYCB400
Third-Party PDRYCB320
Dual Enthalpy OA Sensor
(ZCPE030505DE)
LG PDRYCB400
Third-Party PDRYCB320
LG Dry Contact must be purchased separately.

7
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.
Introduction
Application Economizer with Outdoor Air Dry Bulb Sensor
Outdoor Air Dry Bulb Outside air dry bulb (C7250A1001) sensor is factory installed on economizer.
Single Enthalpy Outside air enthalpy sensor (C7400S1000) is factory provided and field installed.
Mixed Air Sensor Factory provided and field installed.
Differential Enthalpy Sensor Outside air enthalpy sensor (C7400S1000) is factory mounted.
Return air enthalpy sensor (C7400S1000) is factory provided and field mounted in return duct.*
* Includes C7400S sensor and wiring harness.
PRODUCT DATA
* Shipped in hardware kit for eld installation.
HW = Honeywell®(Honeywell is a trademark of Honeywell International Inc.).
Economizer Model No� Quantity Contents
ZCPE03050DB
Single Dry Bulb OA Control
1 Economizer Damper Assembly with Communicating Actuator
1 JADE (HW: W7220) Controller with Attached Harness*
1 Mixed Air Sensor (C7250A1001)
1 Outside Air Sensor (C7250A1001)
1 Hood Assembly with Top, Bottom and Two (2) Sides
2 Aluminum Filter
1 Hardware Kit (Wiring Harness, Transformer)
ZCPE03050SE
Single Enthalpy OA Control
1 Economizer Damper Assembly with Communicating Actuator
1 JADE (HW: W7220) Controller with Attached Harness*
1 Mixed Air Sensor (C7250A1001)
1 Single Enthalpy Sensor Sylkbus (C7400S1000)
1 Hood Assembly with Top and Two (2) Sides
2 Aluminum Filter
1 Hardware Kit (Wirings, Transformer)
ZCPE03050DE
Dual Enthalpy OA Control
1 Economizer Damper Assembly with Communicating Actuator
1 JADE (HW: W7220) Controller with Attached Harness*
2 Single Enthalpy Sylkbus Sensor (C7400S1000)
1 Mixed Air Sensor (C7250A1001)
1 Hood Assembly with Top and Two (2) Sides
2 Aluminum Filter
1 Hardware Kit (Wirings, Transformer)
Accessory List, continued�
Table 3: Package Contents.
Table 4: Economizer Sensor Usage.

8
Split Rooftop Unit Power Exhauster Installation Manual
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.
PRODUCT DATA
Figure 1: Power Exhaust / Economizer --Vertical or Horizontal Applications.
Table 5: Motor / Electrical Data.
• Power exhaust is designed for an ESP 0.5 W.C.
• Fan performance lab tested by fan manufacturer.
Model 21CF-MPE12-18A-*** 115 V / 1 Phase 208 V / 1 Phase 230 V / 1 Phase
Motor Motor Motor
Tons CFM RPM Motor HP FLA MCA MOCP FLA MCA MOCP FLA MCA MOCP
3 1,200 828 0.5 6.2 7.75 13.95 3 3.75 6.75 3.1 3.875 6.975
4 1,400 846 0.5 6.2 7.75 13.95 3 3.75 6.75 3.1 3.875 6.975
5 1,700 884 0.5 6.2 7.75 13.95 3 3.75 6.75 3.1 3.875 6.975
6 1,800 899 0.5 6.2 7.75 13.95 3 3.75 6.75 3.1 3.875 6.975

9
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.
Product Data
Table 6: Sound Power Levels.
PRODUCT DATA
CFM Sound Power Levels
1,200
Freq. (Hz) 63 125 250 500 1,000 2,000 4,000 8,000 Overall
Lw (dB) 78 78 68 63 61 56 51 46 82
Lw (dB) (A) 52 62 59 60 61 57 52 45 82
1,400
Freq. (Hz) 63 125 250 500 1K 2K 4K 8K Overall
Lw (dB) 78 78 68 63 61 56 51 46 82
Lw (dB) (A) 52 62 59 60 61 57 52 45 68
1,700
Freq. (Hz) 63 125 250 500 1K 2K 4K 8K Overall
Lw (dB) 79 79 69 64 62 57 52 47 83
Lw (dB) (A) 53 63 60 61 62 58 5 46 69
1,800
Freq. (Hz) 63 125 250 500 1K 2K 4K 8K Overall
Lw (dB) 82 82 72 65 67 60 55 50 86
Lw (dB) (A) 56 66 63 62 67 61 56 49 72
Table 7: Sheave Adjustment. Table 8: Damper Pressure Drop.
Sheave Turns to Achieve CFM / RPM
CFM Sheave Turns Actual RPM
1,200 5 828
1,400 4.5 846
1,700 4 884
1,800 3.5 899
• Turns open are determined from fully closed position.
• Fan data acquired by third-party testing.
Damper Pressure Drop
CFM O/A PD (IN� WG) R/A PD (IN� WG)
1,200 0.0137 0.0137
1,400 0.0159 0.0159
1,700 0.0194 0.0194
1,800 0.0205 0.0205
Service area not drawn to scale.
Service Clearances
Figure 2: Service Clearances.

10
Split Rooftop Unit Power Exhauster Installation Manual
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.
PRODUCT DATA
Access Panel Locations
Figure 3: Access Panel Locations.
Side Return Air Inlet
Power Exhaust Component Locations
Figure 4: Power Exhaust Component Locations.
Water Entrainment
Filters
Hinged Control
Access
Motor and Belt Access
via Front Opening
Exhaust Hood

11
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.
Unit Installation
UNIT INSTALLATION
Unit Installation
• Follow all local, state, and federal codes when wiring the system. Failure to do so will result in death or serious injury.
• The exhaust fan can cause death or serious injury. Always disconnect power to the HVAC unit before servicing to avoid electric shock.
Failure to do so will result in death or serious injury.
Step 1:
Remove the outdoor air opening and filter
access panel from the LG Split RTU unit as
shown in Figure 5.
Figure 5: Remove Panels.
Step 2�
Remove front screws of the LG Split RTU unit holding the
top of the HVAC unit down. Also, remove screws about
three quarters (3/4) of the way down the sides of the unit’s
top.
Figure 6: Remove Screws from Unit.
Remove Screws
Remove Screws
Step 3�
Lift the top of the Split RTU unit and prop up with supports,
keeping the spacing approximately the same as screw hole
placement (required). See Detail No. 2.
Step 4�
Locate exhaust hood from shipping package, place gasket
around the flanges of the hood and secure the hood over the
exhaust opening with screws provided. See Detail No. 2.
See Detail No. 2
Figure 7: Detail No. 2 on the Split RTU Unit. Figure 8: Detail No. 2.
WARNING

12
Split Rooftop Unit Power Exhauster Installation Manual
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.
Step 5�
When using the belimo actuator option, consult controls contractor regarding economizer
wiring requirements.
Step 6�
Remove the return air pan located at the bottom of the return air hood. Slide the return air
hood assembly into the LG Split RTU unit. Put the left side into the compartment first, and
slide the assembly into the compartment completely by sliding the left and right sides of
the assembly. Slide the power exhaust assembly into the LG Split RTU until the flanges on
the back of the power exhaust rests against the LG Split RTU. See Details No. 2 (previous
page), and Detail No. 3 (see figure at right).
UNIT INSTALLATION
Figure 9: Detail No. 3 .
If using the horizontal return option, keep the pan on the return air hood, and remove the horizontal return air panel from the power exhauster. Run
duct into this opening.
Step 7�
Remove supports used to prop the top of the LG Split RTU (Step 7).
The top of the LG Split RTU hooks over the top ange of the power
exhaust. See Detail No. 4.
Figure 10: Detail No. 4.
Step 8�
Secure top of the power exhaust to the LG Split RTU by using
screws removed in Step 2. Also, screw along the side flanges of the
power exhaust using No. 12 x 1 screws provided with the power
exhaust package. See Detail No. 5.
Figure 11: Detail No. 5. Figure 12: LG Split RTU with Installed Power Exhaust.

13
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.
Unit Installation
UNIT INSTALLATION
Step 9�
Refer to Actuator Removal Section (pages 16 to 19; before beginning Step 9). Remove the JADE Controller mounted on the panel within the
power exhauster, and then field-mount inside of the LG Split RTU control box.
Figure 13: Location Where the JADE Controller is Initially Shipped and
Mounted (Panel Within the Power Exhauster).
Figure 14: JADE Controller From Inital Panel Location (Within the Power
Exhauster) To Final Installation Location (Split RTU Control Panel).
Step 10�
Mount the controller assembly on the right side of the unit control
box. Screw the bracket to the control box through pre-punched
holes.
Step 11�
The hardware kit provided with the economizer is attached to the
controller. Plug the harness into the LG Split RTU per the wiring
diagrams provided.
Figure 15: Mounting the Controller Assembly Using the Pre-Punched
Holes.
Figure 16: Power Exhaust Sub Panel. Figure 17: LG Harness Connections A. Figure 18: LG Harness Connections B.

14
Split Rooftop Unit Power Exhauster Installation Manual
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.
UNIT INSTALLATION
Step 13�
Route the mixed-air sensor wires through the LG Split RTU to the
supply blower compartment.
Figure 19: Mixed Air Sensor.
Step 12�
Remove the mixed-air temperature sensor from its shipping loca-
tion. This is located in the outside air intake hood behind the water
entrainment filters next to the damper actuator.
Figure 20: Routing the Mixed-Sensor Wires to the Supply Blower Com-
partment.
Step 14�
Mount the mixed-air sensor on the supply blower so the end of the
sensor is over the inlet of the supply blower.
Figure 21: Mixed-Air Sensor Over the Supply Blower Inlet.

15
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.
Unit Installation
UNIT INSTALLATION
Step 15�
Route the UL-approved line voltage cable from the power exhaust through the LG Split RTU to its control box.
Figure 22: UL Approved Line Voltage Cable. Figure 23: UL Approved Line Voltage Cable Terminals.
Step 16�
MAMAC SYSTEMS®pressure transmitter is coupled to the power
exhaust and connected to the motor controller via the variable
frequency drive Hitachi®NE-S1 Inverter. It is to be placed at a loca-
tion that detects pressure within the space for differential pressure
control (high-side).
(MAMAC SYSTEMS is a registered trademark of MAMAC SYSTEMS,
Inc.
Hitachi is a registered trademark of Hitachi, Ltd.)
Figure 24: Pressure Transmitter.

16
Split Rooftop Unit Power Exhauster Installation Manual
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.
ACTUATOR REMOVAL
Step 1�
Remove the filter from the outside air hood by opening the filter clip
and sliding the filter back from the bottom.
Actuator Removal Figure 25: Removing the Filter.
Step 2�
Remove the two screws on the horizontal middle part on the corners
of the outside air hood to release the perforated plate. After the
perforated plate is released, remove.
Figure 26: Releasing the Perforated Plate.
Step 3�
Remove the screw on the logic module bracket to detach the logic module-bracket assembly.
Figure 27: Removing the Logic Module. Figure 28: Unscrewing the Logic Module Bracket.

17
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.
Actuator Removal
Step 4�
Unscrew the two (2) screws on the bracket that hold the actuator
linkage, and then remove the bracket.
ACTUATOR REMOVAL
Figure 29: Removing the Actuator Bracket.
Figure 30: Removing the Actuator Bracket.
Step 5�
Remove the spring clip from the damper shaft.
Step 6�
Remove the bolt on the linkage bracket and damper shaft.
Figure 31: Removing the Bolt on the Actuator Linkage Bracket / Damper
Shaft.

18
Split Rooftop Unit Power Exhauster Installation Manual
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.
Step 7�
Remove the retaining clip on the damper linkage to remove the
damper shaft bracket.
ACTUATOR REMOVAL
Figure 32: Removing the Retaining Clip on the Damper Linkage.
Step 8�
Disconnect the damper linkage, and remove the damper shaft
bracket.
Step 9�
Remove the retaining clip from the back of the actuator.
Figure 33: Disconnecting the Damper Linkage; Removing the Damper
Shaft Bracket.
Figure 34: Removing the Actuator Retaining Clip.

19
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.
Actuator Removal
Step 10�
Insert the shaft coupler in the opposite direc-
tion, verify that the position arrow points to
zero.
ACTUATOR REMOVAL
Step 11�
Reverse Steps 9 through 1.
Step 12�
With the actuator bolted back into place, position the Return Air Damper in the open posi-
tion, and tighten the shaft on the control pivots. During this step, keep in mind which direc-
tion the actuator will be rotating. In this case, the actuator will need to rotate in the direction
to the damper so that the rod will push the damper blades closed.
Figure 35: Inserting the Shaft Coupler. Figure 36: Position Arrow Pointing to Zero.
Figure 37: Tightening the Shaft.
Step 13�
Repeat Step 12 with the Outside Air Damper’s shaft, and secure the
rod while the damper is in the closed position.
Figure 38: Securing the Rod.
Step 14�
To ensure the dampers will properly open and close fully, run the
Damper Open Procedure in the Checkout Menu of the - Logic Mod-
ule. Adjust rod arms in the control swivels accordingly.
Figure 39: Testing the Dampers.

20
Split Rooftop Unit Power Exhauster Installation Manual
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.
PULLEY REMOVAL / ADJUSTMENT
Steps require 11 mm, 13 mm, 14 mm size wrenches, along with a 4 mm Allen wrench.
Pulley Removal / Adjustment
Step 1�
Locate the sliding base that the motor is
mounted to by four (4) bolts, and loosen the
bolts using the 13 mm wrench.
Step 2�
The motor adjustment bolt is located on the
back of the sliding base. Rotating the motor
adjustment bolt clockwise will tighten it; rotating
it counterclockwise will loosen it for removal.
If there is no movement in the motor after subse-
quent rotations of the adjustment bolt, repeat Step
1.
Figure 40: Loosening the Motor Mounting
Bolts on the Right Side.
Figure 41: Loosening the Motor Mounting
Bolts on the Left Side.
Step 3�
Rotate the adjustment bolt until the tension
in the belt is low enough for removal from the
pulley. Using a wrench for leverage might be
required for belt removal.
Figure 42: Preparing to Remove the Belt. Figure 43: Using a Wrench for Leverage.
CAUTION
Take care to avoid pinching hands or ngers while
removing or installing the belt.
Figure 44: Top View of the Motor Mounting. Figure 45: Belt is Loose Enough for Removal.