To Next PageTo Next Page
Need help?Do you have a question about the AAON WHA-048 and is the answer not in the manual?
Covers warnings about component damage, injury, or death from improper use.
Details warnings on unit lifting, electric shock, fire hazards, and rotating parts.
Covers warnings on water freezing, water pressure, grounding, and arc flash protection.
Details compliance with industry standards, codes, and regulations for installation.
Provides warnings on handling sharp edges and chemical venting.
Guidelines for unit placement, considering ductwork, electrical, and plumbing.
Information on the location of unit-specific wiring diagrams.
Instructions and recommendations for mounting horizontal units using vibration grommets.
Requirements for installing a p-trap and drain line for condensate removal.
Specifies minimum clearances and unit orientation details for proper installation.
Step-by-step procedure for removing the blower assembly from the side.
Instructions for modifying the unit's discharge direction if needed.
Procedures for safely lifting and handling the unit, including removing shipping materials.
Describes access to components through the optional bottom panel.
Step-by-step procedure for removing the blower assembly from the bottom.
Instructions for accessing the blower motor and fan after assembly removal.
Details on the heat exchanger water piping and potential corrosion issues.
Warnings regarding chemical corrosion, open loop applications, and freezing in heat exchangers.
Guidance on glycol concentration, freezing points, and system setup for water loops.
Recommendations for water piping installation, including material, flushing, and strainer use.
Specifics on water connection sizes and cautionary notes for piping installation.
Details on interpreting unit nameplate voltage specifications and transformer configuration.
Information on electrical supply, single-point connections, and warnings about power sources.
Requirements for overcurrent protection, disconnect switches, and supply conductor sizing.
Discusses the impact of voltage imbalance on motors and supply voltage requirements.
Guidelines for thermostat placement and control wiring, including voltage requirements.
Procedures for connecting field wires to the disconnect switch for 30 Amp and 60 Amp units.
Chart to determine allowable wiring distances based on wire gauge for control signals.
Instructions on accessing filter compartments via side or bottom doors.
Steps for setting up or removing the filter pull for filter installation or changing.
Guidelines for connecting supply and return ductwork to the unit flanges.
Explains the operation of the optional waterside economizer coil in different modes.
Table outlining minimum and maximum operating limits for cooling and heating.
Procedures for checking supply fan operation, direction, amperage, and voltage during startup.
Methods for adjusting supply fan speed for PSC and ECM motors.
Detailed steps for checking and adjusting refrigerant charge based on sub-cooling and superheat.
Procedures for checking evaporator superheat and liquid sub-cooling for correct charge.
Description and specifications of the Pioneer Silver Controller.
Details on controller terminal blocks, wiring harnesses, and input/output connections.
Explanation of LED status indicators and relay status LEDs on the controller.
Describes the operational sequences for supply fan, compressor, and other functions.
Explains reversing valve operation, random start delay, and compressor start/stop delays.
Information on building occupancy modes, night setback, and test mode functionality.
Details on alarm conditions, LED fault codes, and how to interpret them.
Describes alarms that reset automatically, like low/high voltage and leaving water temp.
Covers alarms like air coil temp, entering water temp, emergency shutdown, and condensate level.
Details the terminal blocks and connections for the expansion board.
Configuration settings for fan-speed dehumidification and waterside economizer using dip switches.
Explains logic for supply fan speed based on compressor stage and ECM motor features.
Describes operation for auxiliary heating, fan speed dehumidification, and hot gas reheat.
Steps for checking DX cooling operation, including fan direction, amperage, and voltage.
Importance and procedure for periodic cleaning of drain pans to prevent microbial growth.
Recommendations for inspecting blower wheels for dust buildup and cleaning if necessary.
Procedures for cleaning microchannel coils, including recommended chemicals and water pressure.
Guidelines for monthly filter inspection and replacement to maintain unit efficiency.
Information on how to contact AAON for replacement parts, referencing serial numbers.
Tables detailing filter sizes, quantities, and types for different unit cabinets.
General
