Desert Aire ExpertAire LC Series User Manual

Installation and Operation Manual
• Meets AHRI Standard 910.
• Effective humidity control:
4 to 100 lbs per hour.
• Wide range of ambient
temperatures: 65° to
95° F.
• Air conditioning option.
• Optional outdoor air
intake to help meet
ASHRAE 62 ventilation
requirements.
• Multiple heat sink options
including pool water
heating.
• Scroll compressors for
high efficiency and
longevity.
• Galvanneal cabinet with
high impact, powder coat
textured paint.
• Auxiliary heat including
hot water and electric
coils.
LC System
LV System

Desert Aire ExpertAire LC Series Specifications

General

Refrigerant	R-410A
Power	Varies by model
Dimensions (H x W x D)	Varies by model
Weight	Varies by model
Airflow	Varies by model
Cooling Options	Available
Control System	Microprocessor-based controls
Dehumidification Capacity	Varies by model
Power Supply	208/230/460V, 3-phase
Operating Temperature Range	Varies by model

Summary

LC and LV ExpertAire Series Dehumidifiers

Desert Aire Dehumidification Equipment Warranty

Warranty Terms

Defines the warranty period and limitations for dehumidifier components.

Warranty Conditions

Outlines requirements for maintaining warranty coverage and exclusions.

Introduction to Dehumidifier Installation

Inspection and Freight Damage Claims

Procedures for inspecting equipment upon delivery and handling freight damage.

Rigging Procedures

Guidelines for safely lifting and moving the dehumidifier and remote condenser.

Dehumidifier Installation Guide

Location of Dehumidifier

Selecting the optimal placement for LC and LV dehumidifier units.

Ductwork Installation Standards

Requirements and recommendations for designing and installing duct systems.

Condensate Drain Piping Requirements

Instructions for installing condensate drain connections and p-traps.

Water Heating Application Connections

Details on connecting dehumidifiers for pool water heating applications.

Water Piping Connection Details

Specifies water flow rates and pressure drops for various applications.

Remote Condenser Installation

Guidelines for installing optional remote condensers and factory refrigerant charge.

High Voltage Wiring Requirements

Safety and compliance for connecting high voltage power supply.

High Voltage Electrical Connections

Specifics for single-phase and three-phase power supply connections.

Wire and Fuse Sizing Guidelines

Determining appropriate wire and fuse sizes for the dehumidifier.

Controls and Sensor Setup

Information on the CM3530 controller and sensor installation.

Wall Mount Sensor Placement

Recommended locations for installing wall-mount humidity and temperature sensors.

Duct Mount Sensor Installation

Guidelines for installing duct-mount sensors for continuous blower operation.

Auxiliary Heating Control Wiring

Wiring methods for controlling auxiliary heating systems.

Auxiliary Heating Dry Contact Wiring

Connecting auxiliary heaters using dry contact closures.

Auxiliary Heating Proportional Signal Wiring

Wiring instructions for proportional control of heating coil valves.

Smoke Alarm Interlock Connection

Interlocking the dehumidifier with smoke alarms for safety.

Dehumidifier Start-up Procedure

Preliminary Inspection Checklist

Essential checks before commissioning the dehumidifier unit.

Outdoor Air Application Setup

Guidelines for integrating outdoor air into the system.

Outdoor Air Option Installation

Configuration and installation of units with outdoor air intake options.

Outdoor Air with Standard Systems

Advice on connecting outdoor air to non-equipped systems; warranty voiding.

Outdoor Air Supplemental Information

Details on LC and LV operation modes with outdoor air.

LC and LV Operation Modes

Explains unoccupied and occupied modes for outdoor air integration.

Outdoor Air Pre-Heating Determination

Methodology to determine if outdoor air requires pre-heating.

Approximating Outdoor Air Volume

Equations for estimating outdoor air CFM for unit setup.

Airflow Balancing Procedures

Ensuring proper airflow for code compliance and system longevity.

Blower Adjustment Steps

Instructions for adjusting blower speed via motor pulley.

Airflow Balancing for LC Dehumidifiers

Checking and balancing airflow for LC models using static pressure.

Airflow Balancing for LV Dehumidifiers

Balancing airflow for LV models using static pressure sensors.

Refrigeration System Testing

Procedures for testing sealed refrigeration systems and component longevity.

General System Testing

Verifying operation of all connected equipment and accessories.

Routine Maintenance Schedule

Recommended maintenance tasks for the dehumidifier system.

Monthly Maintenance Tasks

Regular checks and cleaning of filters, coils, and air flow.

Semi-Annual Maintenance Tasks

Checks on belts, electrical connections, and lubrication.

Pool Water Chemistry Standards

Recommended pH, alkalinity, calcium, and chlorine levels for pools.

Troubleshooting Common Issues

Blower Not Running Troubleshooting

Diagnosing and resolving issues when the blower fails to start.

Compressor Not Running Troubleshooting

Identifying causes for the compressor not operating.

Evaporator Coil Freezing Issues

Troubleshooting causes and remedies for evaporator coil icing.

High Head Pressure Diagnosis

Identifying and resolving issues causing excessive head pressure.

Excess Condensation on Walls/Windows

Troubleshooting causes of excess condensation when the unit is running.

Pool Water Heating Problem Diagnosis

Diagnosing issues related to water-cooled unit pool heating functionality.

Appendix: System Information and Procedures

Compressor Failure Analysis

Causes and procedures for compressor failure and burnout.

Compressor Replacement Guidelines

Step-by-step instructions for replacing scroll compressors.

Returning System to Service

Procedures after component replacement, including testing and diagnosis.

System Testing and Final Diagnosis

Ensuring the system operates correctly before returning to normal service.

Recommended Duct Design Practices

Guidelines for designing efficient and problem-free duct systems.

System Operation Guidelines

Optimal settings and operational recommendations for dehumidifier systems.

Recommended Controller Settings

Optimal settings for humidity and air temperature for comfort.

Refrigeration System Pressures

Normal suction and discharge temperature ranges for troubleshooting.

Temperature Rise or Drop Across Unit

Typical air temperature changes across the unit in different modes.

Dehumidifier Sequence of Operation

Standard operational modes and logic for Desert Aire dehumidifiers.

Dehumidification and Air Reheat

Operation mode for dehumidification without cooling.

Dehumidification and Air Cooling

Operation mode for dehumidification with cooling.

Cooling and Water Heating (Water Cooled Unit Only)

Mode for cooling space and heating pool water.

Dehumidification and Water Heating (Water Cooled Units Only)

Mode for dehumidification and pool water heating.

Partial Pool or Spa Water Heating

Routing heating energy for partial pool/spa heating needs.

Water Condensers and Pump Start Operation

Operation of water condensers and control of optional pumps.

Blower Operation Modes

Continuous blower operation for sensor accuracy and air stagnation prevention.

Optional Air Heat Functionality

Activation of auxiliary air heater when room temperature drops.

Outdoor Air Operation

Operation of outdoor air damper and exhaust fan in occupied mode.

Component Replacement and Refrigerant Handling

Procedures for replacing components and handling refrigerants.

Refrigerant Recovery Procedures

Steps for recovering refrigerant safely and according to regulations.

Refrigerant Recovery with System Leak

Procedures for recovering refrigerant from systems with leaks.

Refrigerant Recovery without Leak

Isolating and recovering refrigerant when no leak is present.

Repair and Component Replacement

Guidelines for removing and replacing system components.

System Evacuation Process

Steps for evacuating the refrigeration system to required vacuum levels.

Alternative Evacuation Method

Alternative evacuation process for specific scenarios.

Refrigerant Charging Procedures

Methods for charging the system with the correct refrigerant amount.

System Testing and Final Diagnosis

Final checks and diagnosis after repairs and charging.

Dehumidifier Rating Plate Information

Explanation of information found on the system's rating plate.

Optional Start-Up Supervision Services

Details on Desert Aire's factory start-up supervision services.

System Start-Up Report Completion

Instructions for filling out and submitting the start-up report for warranty.

LC/LV Factory Start-Up Supervision Service Bulletin

LC/LV/LT Series Start-Up Report Form

Location and Unit Information

Details regarding the installation location and unit identification.

Compressor Replacement Form

Location and Unit Information

Details on the unit and compressor for replacement.

Compressor Condition and Failure Determination

Assessing compressor condition and determining the cause of failure.

Diagnostic and Corrective Action Summary

Recording corrective actions taken to prevent repeat failures.