AAON WHA-036 User Manual

WH Series
Horizontal Water-Source Heat Pump Unit
Installation, Operation
& Maintenance
If the information in this manual is not
followed exactly, a fire may result
causing property damage, personal
injury, or loss of life.
WARNING
QUALIFIED INSTALLER
Improper
installation, adjustment,
alteration, service,
or maintenance
can cause property damage,
personal injury or loss of life. Startup
and service must be performed by a
Factory Trained Service Technician.
Keep a copy of this IOM with the unit.
WARNING

AAON WHA-036 Specifications

General

Brand	AAON
Model	WHA-036
Category	Heat Pump
Language	English

Summary

AAON WH Series Features and Options Introduction

Energy Efficiency

Features promoting energy savings, including fan and motor technologies.

Indoor Air Quality

Components enhancing air quality, such as filters and drain pans.

Humidity Control

Systems for managing indoor humidity levels.

System Integration

Unit connectivity and interaction with external systems.

Reduced Sound

Design elements minimizing operational noise output.

Safety

General Safety Warnings

Critical precautions for safe unit installation, operation, and service.

WSHP Series Feature String Nomenclature

Unit Configuration

Decoding the unit's specific configuration through a feature string.

Model Options

Selection of unit size, series, voltage, and various feature codes.

General Information

Codes and Ordinances

Adherence to relevant industry standards and local regulations.

Installation

Locating the Unit

Guidelines for optimal unit placement concerning utilities and airflow.

Condensate Drain Piping

Proper installation of the condensate drain trap and line.

Blower Assembly Removal

Step-by-step instructions for safely removing the blower assembly.

Lifting and Handling the Unit

Procedures for safely lifting and transporting the equipment.

Horizontal Unit Bottom Access

Methods for accessing internal components via the bottom panel.

Electrical

Nameplate Voltage Markings

Interpreting unit electrical specifications and voltage requirements.

How to Connect to WH Series Disconnect

Detailed steps for wiring the unit's main power disconnect.

Control Wiring

Best practices for thermostat and control signal wiring.

Startup

Operation Limits

Defined acceptable ranges for unit operation parameters.

Supply Fans

Procedures for checking fan rotation, amperage, and voltage.

Adjusting Refrigerant Charge

Guidelines for field adjustment of system refrigerant levels.

Checking Liquid Sub-Cooling

Measuring and verifying the unit's liquid sub-cooling parameter.

Operation

AAON WSHP Pioneer Silver Controller

Overview of the primary control system's functions and specifications.

Sequences of Operation

Step-by-step functional logic for unit components.

Alarms

Identification and interpretation of unit fault codes and status indicators.

AAON WSHP Pioneer Silver Expansion Board

Controller Layout

Diagram illustrating the expansion board's terminals and components.

Dip Switch Settings

Configuration of onboard dip switches for system settings.

Maintenance

Supply Fans

Periodic inspection and cleaning of blower fan assemblies.

Microchannel Coil Cleaning

Recommended procedures and chemicals for coil maintenance.

Filter Replacement

Guidance on inspecting and replacing air filters for optimal efficiency.

Appendix A - Heat Exchanger Corrosion Resistance

Scaling and Corrosion

Factors affecting heat exchanger scaling and material corrosion.

Biological Growth and Erosion

Impact of microbial activity and water velocity on heat exchangers.