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Explains furnace ignition, interlock switch, self-diagnosing control module, and heat loss calculation.
Provides guidance on furnace placement, clearances, and installation in residential garages.
Details minimum required clearances to combustible materials for safe installation.
Explains necessary high altitude kits and provides derate information for varying altitudes.
Details compatible Amana® brand coils for AMH95 furnaces and Goodman® units.
Refers to separate specification sheets for complete thermostat lineup.
Outlines filter requirements, sizes, and airflow considerations for upflow applications.
General warnings about high voltage, proper grounding, and service procedures for safe operation.
This document serves as a technical manual for the Amana AMH95 40" 95% Gas Furnace, providing essential information for qualified, professionally trained HVAC technicians regarding its installation, operation, and maintenance. It emphasizes adherence to safety protocols and proper service procedures to prevent property damage, personal injury, or death.
The Amana AMH95 gas furnace is a heating appliance designed to provide efficient warmth for residential and commercial spaces. It operates by burning natural gas or propane to generate heat, which is then distributed throughout the building via a blower system. The furnace is equipped with an electronic ignition device to light the burners, eliminating the need for a pilot light, and an induced draft blower to safely exhaust combustion products. This design ensures efficient combustion and prevents the accumulation of harmful gases within the living space.
A key feature of the AMH95 furnace is its high efficiency, indicated by its 95% AFUE (Annual Fuel Utilization Efficiency) rating. This means that 95% of the fuel consumed is converted into usable heat, minimizing energy waste and reducing heating costs. The furnace is available in various BTUH (British Thermal Units per Hour) input capacities, ranging from 45,000 to 140,000, allowing for selection based on the heating requirements of different spaces.
The AMH95 furnace incorporates a sophisticated electronic control module that manages its operation and provides self-diagnostics. This module monitors various furnace components and functions, ensuring optimal performance and safety. In the event of a malfunction, the control module's LED will flash a specific sequence, indicating the nature of the problem. This diagnostic capability simplifies troubleshooting and allows technicians to quickly identify and address issues.
The furnace is designed for both upflow/horizontal and downflow/horizontal airflow configurations, offering flexibility in installation to suit different building layouts and ducting systems. It also supports two-stage/multi-speed or two-stage/variable-speed operation, which allows the furnace to adjust its heat output and fan speed based on the actual heating demand. This capability enhances comfort by providing more consistent temperatures and reduces energy consumption by avoiding unnecessary full-power operation.
For cooling applications, the AMH95 furnace is designed to integrate with Amana brand indoor coils, which are available in both cased and uncased models. These coils facilitate the removal of heat and humidity from the indoor air when paired with a matched outdoor air conditioning unit. The manual provides detailed information on coil matches, including nominal capacity ranges and refrigerant charges, to ensure proper system compatibility and performance.
The AMH95 furnace is designed for user convenience and efficient operation. Once installed and configured by a qualified technician, its operation is largely automatic, controlled by a thermostat. Users can set their desired temperature, and the furnace will cycle on and off as needed to maintain that temperature. The two-stage heating capability means the furnace can operate at a lower, more energy-efficient setting for most of the time, only ramping up to full capacity during colder periods or when a quick temperature change is required. This results in quieter operation and more stable indoor temperatures.
The self-diagnostic LED on the electronic control module, visible through an observation window in the blower access door, provides a quick visual indicator of the furnace's status. While primarily for technicians, this can also offer a basic understanding to the homeowner if a fault occurs, prompting them to contact a service professional.
The furnace's design allows for flexible installation, accommodating various space constraints and ductwork configurations. It can be installed in an upflow, downflow, or horizontal orientation, making it adaptable to different residential and commercial settings. When installed in a residential garage, specific positioning requirements ensure safety by elevating the burners and ignition source above potential flammable vapors.
The AMH95 furnace is compatible with various thermostat types, allowing users to choose a control system that best suits their preferences, from basic programmable thermostats to advanced smart thermostats that offer remote control and energy management features.
Maintenance of the AMH95 furnace is crucial for ensuring its longevity, efficiency, and safe operation. The manual emphasizes that all service and maintenance procedures must be performed by qualified HVAC technicians.
A primary maintenance feature is the requirement for air filters. The furnace has provisions for installing return air filters at the side and/or bottom return. These filters are essential for protecting the furnace's internal components from dust and debris, as well as for maintaining good indoor air quality. The manual specifies that filters must comply with UL900 or CAN/ULCS111 standards, and failure to use filters will void the unit warranty. Regular inspection and replacement of these filters are critical maintenance tasks. The manual provides tables to determine the appropriate filter area requirement based on cabinet size and airflow, ensuring proper air circulation and filtration.
The electronic control module's self-diagnostic capabilities are a significant maintenance aid. The LED flash codes guide technicians in identifying specific problems, such as pressure switch issues, open high limits, flame sense failures, or rollout conditions. This reduces diagnostic time and ensures that repairs are targeted and efficient. The manual directs technicians to the "Troubleshooting Chart" and "Abnormal Operation - Integrated Ignition Control" section in the Service Instructions for detailed explanations of these codes.
Accessibility clearances are specified to ensure that technicians have adequate space to perform inspections, cleaning, and repairs. A minimum of 24 inches at the front of the furnace is required for servicing or cleaning, highlighting the importance of proper installation spacing.
The manual also details the availability of conversion kits for high altitude operation, for both natural gas and propane. This allows the furnace to be adapted to different geographical locations, ensuring optimal performance and safety at higher elevations. The conversion involves installing appropriate high altitude orifice kits and potentially pressure switch kits, which must be done by a qualified technician.
For component replacement, the manual stresses the importance of using manufacturer-specified replacement parts. This ensures compatibility, safety, and continued performance of the furnace. The wiring diagrams provided in the manual are crucial for technicians to correctly diagnose electrical issues and perform wiring repairs or replacements. It also specifies that any original wiring replaced must use material with a temperature rating of at least 105°C and copper conductors only.
Overall, the AMH95 furnace is designed with features that facilitate both routine maintenance and more complex diagnostic and repair procedures, all while prioritizing safety and efficiency.
General| Model | AMH95 Series |
|---|---|
| Efficiency Rating | Up to 95% AFUE |
| Heating Capacity | 40, 000 to 120, 000 BTU/h |
| Cabinet | Heavy-Gauge Steel |
| Fuel Type | Natural Gas or Propane |
| Blower Motor | Variable-speed |
| Heat Exchanger | Stainless steel |
| Warranty | 10-Year Parts Limited Warranty, Lifetime Heat Exchanger Limited Warranty |
