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Explains symbols for hazard intensity and potential outcomes.
Specifies that certified technicians or NATE qualified individuals should use this information.
Emphasizes disconnecting all power sources before servicing to prevent injury.
Highlights installer's duty to comply with local/national codes for safe installation.
Stresses proper ventilation in enclosed spaces to prevent carbon monoxide hazards.
Advises using only factory authorized kits and accessories for installation or modification.
States the unit is not approved for outdoor installations.
Specifies the unit's design for 108/120 V, single-phase, 60 Hz power supply.
Guides on visually inspecting for shipping damage and verifying product labels upon receipt.
Instructs to read all guidelines carefully, clarify uncertainties, and gather tools before installation.
Details required clearances for service and protective barriers in certain areas.
Outlines requirements for drain line pitch and condensate trap installation for proper drainage.
Mandates installation according to NFPA 90A/90B and NECA Manual K standards.
Recommends using non-flammable flexible collars to prevent vibration transmission.
Advises on proper sizing of supply/return air drops and ductwork design for quiet operation.
Recommends insulating ductwork in unconditioned areas to prevent heat loss/gain.
Caution to ensure the unit is adequately sized and not to exceed outdoor unit tonnage.
Instructions on releasing nitrogen pre-charge and cleaning coil fins before installation.
Details on preparing connection joints, avoiding damage, and brazing safety.
Warning about connecting hot water supply and potential burn hazards.
Specifies the use of only lead-free solder for water coil connections.
Advises protecting Schrader valves and cores from heat during installation.
Introduces flowrator coils and their installation requirements.
Emphasizes correct piston sizing for system performance and compressor protection.
Provides a table correlating outdoor unit capacity with required piston orifice sizes for R22 and R410A.
Step-by-step instructions for disassembling, replacing, and reassembling the flowrator piston.
Highlights the critical importance of correctly seating the Teflon O-ring for a proper seal.
Stresses the correct orientation of the piston into the distributor body to prevent operational damage.
Warning to protect the TXV sensing bulb and body from overheating during brazing.
Advises ensuring the selected TXV is compatible with the system's refrigerant (R22 or R410A).
Recommends sizing TXV valves according to outdoor unit capacity to ensure performance.
Details the requirement for direct contact with the suction line and optimal positioning.
Lists the criteria for correct TXV sensing bulb mounting for accurate superheat control.
Provides instructions for mounting the TXV bulb vertically when horizontal mounting is not feasible.
Step-by-step guide for installing a field-supplied expansion valve coil.
Warning against touching hot braze joints during TXV installation to prevent burns.
Specific instructions for installing TXV equalization tubes when Schrader ports are absent.
Warning not to drill holes for chips that could enter the suction manifold.
Illustrates the components of a typical TXV assembly for reference.
Notes that non-bleed expansion valves may require a hard-start kit.
States the unit can be installed vertically or horizontally without modification.
Mandates an auxiliary drain pan for horizontal installations to maintain warranty.
Detailed steps for configuring the unit for horizontal left-hand airflow discharge.
Procedures for reconfiguring the air handler for counter flow operation.
Instructions on positioning specific plates for the counter flow configuration.
Outlines electrical supply, wiring, and code compliance for installation.
Describes the function of the control board and factory jumper settings.
Explains the setting of the aquastat jumper for blower operation.
Provides typical electrical connection diagrams for A/C and heat pump applications.
Details wiring connections for boiler terminals and external valves or pumps.
Explains the sequence and timing for hydronic circulation and blower activation during heating.
Describes the freeze protection sensor and its role in preventing coil freezing.
Emphasizes purging air from the hydronic coil and lines before starting the pump.
Specifies the safe operating range for hot water supply to the coil and burn hazard warnings.
Guides on connecting the hydronic coil to the water heater system using flexible piping.
Detailed instructions for purging air from the hydronic system and coil.
Instructs on adjusting the water heater thermostat for optimal coil temperature.
Guides on adjusting the heat anticipator for proper cycle length and unit operation.
Details thermostat settings and system switch positions for electric heat operation.
Explains how to adjust dampers, registers, and motor speed for required airflow.
Describes methods for checking airflow, including temperature rise and CFM calculation.
Provides the formula for calculating CFM based on BTUH output and temperature rise.
Offers brief descriptions of the unit's key components and installation concepts.
Explains the room thermostat's role, optimal placement, and maintenance.
Details the importance of air filters for system cleanliness and efficiency, and their maintenance.
Stresses the importance of circuit breakers for over-current protection and identifying them.
Lists crucial safety warnings including storage of flammables, panel removal, and identifying shut-off devices.
Highlights the necessity of annual checkups and cleaning for performance and longevity.
Notes that direct drive blower motors have permanently lubricated bearings and require no further lubrication.
Advises on replacing air filters with the same type and size as originally furnished.
Guides on selecting an air handler with adequate heating output and matching cooling coil size.
Provides guidance on selecting appropriate water heater gallon capacity and BTU input.
Lists minimum water heater gallon capacities based on system CFM requirements.
Offers a method to calculate required water heater BTU input based on structure's heat loss.
Outlines preliminary steps before servicing or replacing the pump.
Detailed steps for removing, replacing, and re-installing the pump housing assembly.
Suggests purging the system again if a noisy pump is encountered.
Addresses potential causes for T&P valve weeping, such as backflow preventers or expansion tanks.
Identifies a stuck check valve as a cause for hot water circulation during cooling cycles.
Lists potential causes for lack of heat, including system purging, reversed connections, and undersized components.
Details the wiring connections for the low-voltage thermostat to the unit.
Illustrates the high-voltage power supply connections and warnings.
Explains important notes, wire color codes, and diagram numbering for electrical connections.
Explains symbols for hazard intensity and potential outcomes.
Specifies that certified technicians or NATE qualified individuals should use this information.
Emphasizes disconnecting all power sources before servicing to prevent injury.
Highlights installer's duty to comply with local/national codes for safe installation.
Stresses proper ventilation in enclosed spaces to prevent carbon monoxide hazards.
Advises using only factory authorized kits and accessories for installation or modification.
States the unit is not approved for outdoor installations.
Specifies the unit's design for 108/120 V, single-phase, 60 Hz power supply.
Guides on visually inspecting for shipping damage and verifying product labels upon receipt.
Instructs to read all guidelines carefully, clarify uncertainties, and gather tools before installation.
Details required clearances for service and protective barriers in certain areas.
Outlines requirements for drain line pitch and condensate trap installation for proper drainage.
Mandates installation according to NFPA 90A/90B and NECA Manual K standards.
Recommends using non-flammable flexible collars to prevent vibration transmission.
Advises on proper sizing of supply/return air drops and ductwork design for quiet operation.
Recommends insulating ductwork in unconditioned areas to prevent heat loss/gain.
Caution to ensure the unit is adequately sized and not to exceed outdoor unit tonnage.
Instructions on releasing nitrogen pre-charge and cleaning coil fins before installation.
Details on preparing connection joints, avoiding damage, and brazing safety.
Warning about connecting hot water supply and potential burn hazards.
Specifies the use of only lead-free solder for water coil connections.
Advises protecting Schrader valves and cores from heat during installation.
Introduces flowrator coils and their installation requirements.
Emphasizes correct piston sizing for system performance and compressor protection.
Provides a table correlating outdoor unit capacity with required piston orifice sizes for R22 and R410A.
Step-by-step instructions for disassembling, replacing, and reassembling the flowrator piston.
Highlights the critical importance of correctly seating the Teflon O-ring for a proper seal.
Stresses the correct orientation of the piston into the distributor body to prevent operational damage.
Warning to protect the TXV sensing bulb and body from overheating during brazing.
Advises ensuring the selected TXV is compatible with the system's refrigerant (R22 or R410A).
Recommends sizing TXV valves according to outdoor unit capacity to ensure performance.
Details the requirement for direct contact with the suction line and optimal positioning.
Lists the criteria for correct TXV sensing bulb mounting for accurate superheat control.
Provides instructions for mounting the TXV bulb vertically when horizontal mounting is not feasible.
Step-by-step guide for installing a field-supplied expansion valve coil.
Warning against touching hot braze joints during TXV installation to prevent burns.
Specific instructions for installing TXV equalization tubes when Schrader ports are absent.
Warning not to drill holes for chips that could enter the suction manifold.
Illustrates the components of a typical TXV assembly for reference.
Notes that non-bleed expansion valves may require a hard-start kit.
States the unit can be installed vertically or horizontally without modification.
Mandates an auxiliary drain pan for horizontal installations to maintain warranty.
Detailed steps for configuring the unit for horizontal left-hand airflow discharge.
Procedures for reconfiguring the air handler for counter flow operation.
Instructions on positioning specific plates for the counter flow configuration.
Outlines electrical supply, wiring, and code compliance for installation.
Describes the function of the control board and factory jumper settings.
Explains the setting of the aquastat jumper for blower operation.
Provides typical electrical connection diagrams for A/C and heat pump applications.
Details wiring connections for boiler terminals and external valves or pumps.
Explains the sequence and timing for hydronic circulation and blower activation during heating.
Describes the freeze protection sensor and its role in preventing coil freezing.
Emphasizes purging air from the hydronic coil and lines before starting the pump.
Specifies the safe operating range for hot water supply to the coil and burn hazard warnings.
Guides on connecting the hydronic coil to the water heater system using flexible piping.
Detailed instructions for purging air from the hydronic system and coil.
Instructs on adjusting the water heater thermostat for optimal coil temperature.
Guides on adjusting the heat anticipator for proper cycle length and unit operation.
Details thermostat settings and system switch positions for electric heat operation.
Explains how to adjust dampers, registers, and motor speed for required airflow.
Describes methods for checking airflow, including temperature rise and CFM calculation.
Provides the formula for calculating CFM based on BTUH output and temperature rise.
Offers brief descriptions of the unit's key components and installation concepts.
Explains the room thermostat's role, optimal placement, and maintenance.
Details the importance of air filters for system cleanliness and efficiency, and their maintenance.
Stresses the importance of circuit breakers for over-current protection and identifying them.
Lists crucial safety warnings including storage of flammables, panel removal, and identifying shut-off devices.
Highlights the necessity of annual checkups and cleaning for performance and longevity.
Notes that direct drive blower motors have permanently lubricated bearings and require no further lubrication.
Advises on replacing air filters with the same type and size as originally furnished.
Guides on selecting an air handler with adequate heating output and matching cooling coil size.
Provides guidance on selecting appropriate water heater gallon capacity and BTU input.
Lists minimum water heater gallon capacities based on system CFM requirements.
Offers a method to calculate required water heater BTU input based on structure's heat loss.
Outlines preliminary steps before servicing or replacing the pump.
Detailed steps for removing, replacing, and re-installing the pump housing assembly.
Suggests purging the system again if a noisy pump is encountered.
Addresses potential causes for T&P valve weeping, such as backflow preventers or expansion tanks.
Identifies a stuck check valve as a cause for hot water circulation during cooling cycles.
Lists potential causes for lack of heat, including system purging, reversed connections, and undersized components.
Details the wiring connections for the low-voltage thermostat to the unit.
Illustrates the high-voltage power supply connections and warnings.
Explains important notes, wire color codes, and diagram numbering for electrical connections.
This document provides installation and operating instructions for the ABM Series Multi-Position Air Handler with Hydronic Heat. It covers various aspects of the unit, including safety, installation procedures, electrical connections, and maintenance.
The ABM Series Multi-Position Air Handler is designed to provide heating and cooling for residential and commercial spaces. It is a versatile unit that can be installed in multiple positions, including horizontal left discharge, horizontal right discharge, upflow, and counterflow, to suit different installation requirements. The unit incorporates hydronic heat, meaning it uses hot water circulating through coils to provide heating. This system is designed to work in conjunction with an outdoor condensing unit for cooling and a boiler or water heater for heating.
The air handler's primary function is to circulate conditioned air throughout a building. During the heating cycle, hot water from an external source (boiler or water heater) flows through the hydronic coil, transferring heat to the air. A blower motor then distributes this warmed air through the ductwork. In the cooling cycle, the unit works with an outdoor condensing unit, where refrigerant flows through an evaporator coil within the air handler, absorbing heat from the indoor air. The blower then circulates the cooled air.
A key component of the system is the expansion valve, which regulates the flow of refrigerant into the evaporator coil, optimizing cooling performance. For hydronic heating, the unit includes a micro-processor based control board that manages the electrical functions, including the blower motor and pump (if installed). The system is designed to be controlled by a remote thermostat, allowing users to set desired temperatures for both heating and cooling.
The ABM Series Air Handler offers several features that enhance its usability and adaptability. Its multi-position design allows for flexible installation in various orientations, which is crucial for fitting into different building layouts and existing ductwork configurations. The unit can be configured for upflow, downflow (counterflow), horizontal left, or horizontal right discharge, making it suitable for a wide range of applications.
For heating, the unit utilizes hydronic coils, which can be connected to a boiler or a water heater. The control board includes settings for managing the hydronic heat, such as an aquastat jumper that can be set to "ON" if an aquastat is used, ensuring the blower is energized at appropriate temperatures. If a pump is factory-installed, it will be energized automatically on a call for heat. For units without a factory-installed pump, two black wires need to be connected to the boiler terminals.
The unit's blower motor offers multiple speeds (high, medium, low) to adjust airflow based on heating or cooling demands and external static pressure. This allows for fine-tuning of air delivery to achieve optimal comfort and efficiency. The installation instructions provide a table of CFM (Cubic Feet per Minute) values at various external static pressures for different models and motor speeds, aiding installers in setting up the system correctly.
The air handler is designed to be controlled by a 24V remote thermostat, which typically offers settings for fan operation (on/auto) and system mode (heat/cool). The electrical connections are straightforward, with clear diagrams provided for connecting the thermostat, condensing unit, and boiler/zone valve.
The unit also features a freeze protection sensor, which is a safety mechanism to prevent damage from freezing temperatures, particularly important for the hydronic components.
Regular maintenance is crucial for the longevity and efficient operation of the ABM Series Air Handler. The manual emphasizes several key maintenance aspects:
By following these maintenance guidelines, users can ensure the ABM Series Air Handler operates efficiently, reliably, and safely for many years.
General| Type | Modular Air Handler |
|---|---|
| Airflow Range | 6, 000 to 60, 000 CFM |
| Voltage Options | 208/230V, 460V, 575V |
| Construction | Galvanized steel |
| Filters | pleated |
| Coil Options | hot water, steam |
| Controls | Factory-mounted |
