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General| Brand | WaterFurnace |
|---|---|
| Model | AT022C/D |
| Category | Furnace |
| Language | English |
Defines unit type, size, vintage, electrical characteristics, and options.
Emphasizes trained personnel and safety equipment for handling.
Covers safe practices for moving and storing the unit.
Specifies upright orientation and maximum stacking height.
Advises checking for shipping damage upon receipt.
Details fan motor, compressor, and air coil specifications.
Lists refrigerant charge, filter types, and unit weights.
Specifies environmental conditions and space for installation.
Details mounting and leveling procedures for vertical units.
Explains suspension, pitching, and floor placement for horizontal units.
Explains connecting ductwork and recommends insulation.
Specifies requirements for cutting floor openings for vertical units.
Describes pipe thread connections and flexible hose limitations.
Details connecting to ground loop and open loop systems.
Discusses copper/cupronickel choice and mineral deposit issues.
Explains setting the freeze protection switch for loop types.
Describes the drain tube and adapter for vertical units.
Details the copper stub and required external trap for horizontal units.
Recommends cleaning with detergent and water for maximum performance.
Specifies loop temp range and methods for rejecting excess heat.
Details flushing procedures and valve installations for servicing.
Outlines purging, charging, and pressurizing the loop for operation.
Explains expected fluctuations in loop static pressure with seasons.
Describes connecting slave terminals and pump control logic for multiple units.
Details SW2-2 setting, piping, valves, expansion tanks, and flow rate.
Recommends tank capacity and provides steps for draining and flushing.
Describes drain tee assembly, copper tubing, and venting.
Recommends insulating all exposed water lines.
Details refilling the tank and purging air from the pump.
Stresses leak checks and guides water heater temperature adjustments.
Covers DHW pump operation and unit power wiring.
Explains connecting external loop pumps to the unit's electrical box.
Describes the relay's dry contacts and how to wire it to accessories.
Details switching transformer wires for 208V operation.
Explains LED status and diagnostic modes using the control board.
Defines wiring symbols and identifies key components on the logic board.
Explains the purpose and configuration of various DIP switches.
Explains LED status and diagnostic modes for 3-phase units.
Defines wiring symbols and identifies key components on the logic board.
Explains the purpose and configuration of various DIP switches.
Details connecting thermostat wires and setting SW2-8.
Describes the sequence of operations for heating and cooling stages.
Details High Pressure, Low Pressure, Freeze Protection, Condensate Overflow, and Fan RPM lockouts.
Explains Service Test, Freeze Protection, and Accessory Relay settings.
Details Two-Speed/Single-Speed, ECM/ECM2, and EH board configurations.
Explains setting speeds using DIP switch SW1 for ECM2 motors.
Provides a table correlating DIP switch settings with airflow for models.
Lists essential checks before applying power to the unit.
Details sequential steps for initiating and verifying cooling and heating operations.
Explains testing auxiliary heaters and performing final system checks.
Covers cleaning and maintaining water and air coils.
Details inspection and cleaning of air filters and condensate drains.
Notes that ECM2 motors require no periodic oiling.
Guides troubleshooting control board functions and refrigerant system parameters.
Details ordering parts and the process for in-warranty material returns.
Lists suction and discharge pressures for cooling and heating modes.
Provides electrical data for 208-230/60/1 and 208-230/60/3 models.
