Amana GUCA070AX40 User Manual

Service
Instructions
40" 90% Condensing Gas Furnaces
GUCA, GCCA & Accessories
This manual is to be used by qualified HVAC
technicians only. Amana does not assume
any responsibility for property damage or
personal injury for improper service proce-
dures done by an unqualified person.
RS6610002
Revision 0
October 1998
A
higher standard of comfor
t
Heating
n
Air Conditioning
®
Model and Manufacturing
numbers listed on page 4.

Amana GUCA070AX40 Specifications

General

Model	GUCA070AX40
Type	Upflow/Horizontal
Heating Capacity	70, 000 BTU
Efficiency Rating	80% AFUE
Blower Type	Multi-speed
Weight	120 lbs
Fuel Type	Natural Gas
Stages	Single Stage
Blower Motor	PSC
Vent Diameter	4 inches

Summary

Service Instructions

Important Safety Information

Important Notices

Key warnings and disclaimers regarding service procedures.

Safety Symbols and Labels

Explanation of safety symbols like DANGER, WARNING, and CAUTION.

Product Identification

Model and Manufacturing Numbers

Identifying furnaces by model and manufacturing numbers for service.

Furnace Accessory Kits

Listing of available accessory kits for furnaces.

Additional Furnace Accessories

Listing of other accessory items for furnaces.

Model Number Breakdown

Explanation of how furnace model numbers are structured.

Safety and Operating Instructions

Crucial safety precautions and step-by-step operating instructions.

GUCA Furnace Dimensions and Clearances

Physical dimensions and clearances for GUCA furnace models.

GCCA Furnace Dimensions and Clearances

Physical dimensions and clearances for GCCA furnace models.

Component Identification

Identification of furnace components with diagrams for GUCA/GCCA.

Coil Matches

Chart showing compatible Amana coils for GUCA and GCCA furnaces.

Floor Bases and Filter Racks

Specifications and dimensions for floor bases and filter racks.

Media Air Cleaner

Specifications and dimensions for media air cleaners.

Electronic Air Cleaner

Specifications and dimensions for electronic air cleaners.

Concentric Vent Kit and Installation

Details on concentric vent kits and their installation.

Furnace Specifications

GUCA Furnace Specifications

Technical specifications for GUCA series gas furnaces.

GCCA Furnace Specifications

Technical specifications for GCCA series gas furnaces.

Blower Performance Specifications

GUCA Blower Performance Data

Blower performance tables for GUCA furnaces at various static pressures.

GCCA Blower Performance Data

Blower performance tables for GCCA furnaces at various static pressures.

BTU Output vs Temperature Rise Chart

Chart illustrating the relationship between BTU output and temperature rise.

Combustion and Ventilation Air

Air Requirements and General Guidelines

General requirements for combustion and ventilation air.

5.3.1 General Requirements

General provisions for gas utilization equipment air supply.

Equipment Located in Unconfined Spaces

Air supply considerations for equipment in unconfined spaces.

Equipment Located in Confined Spaces

Air supply considerations for equipment in confined spaces.

Confined Spaces: Air From Inside Building

Air supply for confined spaces using indoor air.

Confined Spaces: Air From Outdoors

Air supply for confined spaces using outdoor air.

Specially Engineered Installations

Requirements for specially engineered air supply installations.

Louvers and Grilles

Considerations for louvers, grilles, and screens affecting free area.

Vent/Flue Pipe and Combustion Air Pipe General

General information on vent/flue pipe and combustion air pipe.

Termination Locations

Restrictions and guidelines for vent/flue pipe and combustion air terminations.

Canadian Venting Requirements

Venting requirements specific to Canadian codes.

Standard Furnace Connections

Using standard furnace connections for vent/flue and air intake.

Alternate Furnace Connections

Utilizing alternate side panel locations for connections.

Alternate Vent/Flue Location

Procedures for using the alternate vent/flue location.

Vent/Flue Pipe Cuts

Instructions for cutting vent/flue pipe for alternate location.

Alternate Combustion Air Intake Location

Procedures for using the alternate combustion air intake location.

Non-Direct Vent (Single Pipe) Piping

Guidelines for single-pipe non-direct vent installations.

Non-Direct Vent (Single Pipe) Pipe Lengths

Maximum allowable vent/flue pipe lengths for single pipe systems.

Vent/Flue Pipe Terminations

Details on vertical and horizontal vent/flue pipe terminations.

Direct Vent (Dual Pipe) Piping

Guidelines for dual-pipe direct vent installations.

Vent/Flue and Combustion Air Pipe Lengths and Diameters

Applicable lengths, elbows, and diameters for dual pipe systems.

Vent/Flue and Combustion Air Pipe Terminations

Details on vertical and horizontal terminations for dual pipe systems.

Concentric Vent Termination

Information on concentric vent kits for direct vent furnaces.

Condensate Drain Lines and Drain Trap

Upright Installations

How condensate drains are routed in upright furnace installations.

Standard Right or Left Side Drain Hose Connections

Connecting drain hoses for standard vent/flue outlets.

Alternate Vent/Flue Drain Hose Connections

Connecting drain hoses for alternate vent/flue outlets.

Upright Drain Trap Mounting

Instructions for mounting the drain trap on the side panel.

Horizontal Installations

Drain hose connections and trap mounting for horizontal installations.

Horizontal Connections Left Side Down

Drain hose connections for left side down horizontal installations.

Horizontal Drain Trap Mounting

Mounting the drain trap for horizontal installations.

Product Design

Electrostatic Discharge (ESD) Precautions

Procedures to prevent damage from static discharge to components.

Product Application and Certification

Intended use and certification of the furnace.

Location Requirements and Considerations General

General guidelines for selecting furnace installation locations.

Furnace Suspension

Methods for suspending the furnace from rafters or joists.

Horizontal Applications and Considerations

General considerations for installing furnaces horizontally.

Clearances and Accessibility

Required clearances for installation and service access.

Existing Furnace Removal

Procedures for removing an existing furnace.

Thermostat Location and Drain Trap

Guidelines for thermostat placement and drain trap installation.

Alternate Vent/Flue and Combustion Air Connections

Using alternate locations for vent/flue and air connections.

Electrical and Gas Line Connections

Provisions for electrical and gas line connections.

Electrical Connections and Wiring Harness

Important warnings and information for electrical connections.

Junction Box Relocation

Steps for relocating the junction box for alternate wiring.

24 Volt Thermostat Wiring

Instructions for connecting thermostat wiring to the control module.

Accessory Connections and Wiring

Connecting 115V accessories and wiring guidelines.

Gas Supply and Piping General

General requirements for gas supply and piping installation.

Gas Piping Connections General

Specifics on making gas piping connections to the furnace.

Propane Gas Conversion and Gas Valve

Instructions for propane conversion and gas valve operation.

Direct/Standard and Indirect/Alternate Inlet Piping

Gas piping connection methods for standard and alternate inlet holes.

Gas Piping Checks and Propane Systems

Procedures for gas piping checks and propane system considerations.

Propane Gas Installation and Piping Charts

Propane gas installation illustration and pipe sizing charts.

Ductwork, Air Flow, and Filter Requirements

Guidelines for duct design, airflow, and filter selection.

Filter Sizing Charts and Locations

Tables for filter sizes and diagrams for filter locations.

Startup Procedure and Adjustment

Steps for safely starting up and adjusting the furnace.

Heat Anticipator Setting and Drain Trap Priming

Adjusting the heat anticipator and priming the drain trap.

Furnace Operation and Blower Speeds

Overview of furnace operation and circulator blower speed adjustment.

Circulator Blower Speeds and Delay Timings

Blower speed settings and heat off delay timing options.

System Operation

Power Up Sequence

The sequence of operations when power is first applied.

Heating Mode Operation

Step-by-step operation sequence for heating mode.

Cooling Mode Operation

Step-by-step operation sequence for cooling mode.

Fan Only Mode Operation

Step-by-step operation sequence for fan-only mode.

Heating Operation Timing Chart

Graphical representation of heating cycle timing.

Cooling Operation Timing Chart

Graphical representation of cooling cycle timing.

Electrostatic Discharge (ESD) Precautions

Precautions to protect electronic components from static discharge.

Resetting From Lockout

Methods to reset the furnace from a lockout condition.

Troubleshooting Chart

Guide to diagnosing furnace problems based on symptoms and LED codes.

Troubleshooting Chart

Continuation of the troubleshooting guide with more fault descriptions.

Polarization and Phasing

Checking Transformer Phasing

Procedures for checking transformer phasing for proper operation.

Maintenance

Annual Inspection Checklist

Recommended annual inspection checklist for furnace components.

Filter Maintenance and Removal

General filter maintenance and removal instructions.

Blower and Condensate Maintenance

Maintenance of blower motors and condensate drainage systems.

Flue and Burner Maintenance

Inspection and cleaning of flue passages and burners.

Servicing

Test Equipment and Performance Tests

Essential test equipment and heating performance test procedures.

Gas Rate - Cubic Feet Per Hour Chart

Chart for calculating gas consumption rates.

Troubleshooting Chart Summary

A quick reference guide for diagnosing furnace issues.

S-1 to S-3 Servicing Procedures

Checking voltage, wiring, thermostat, and anticipator.

S-4 to S-5 Servicing Procedures

Checking transformer, control circuit, and primary limit control.

S-6 to S-7 Servicing Procedures

Checking auxiliary limit control and blower motor.

S-8 to S-9 Servicing Procedures

Checking capacitor and gas valve.

S-10 to S-11 Servicing Procedures

Checking main burners and orifices.

S-12 Checking Gas Pressure

Measuring and adjusting gas supply and manifold pressure.

S-13 to S-14 Servicing Procedures

Diagnosing delayed ignition and flash-back.

S-15 to S-16 Servicing Procedures

Checking duct static and temperature rise.

Pressure Switch Trip Points and Usage Chart

Chart for pressure switch trip points and usage.

S-17 to S-18 Servicing Procedures

Testing pressure controls and high altitude applications.

S-19 to S-20 Servicing Procedures

Checking igniters and ignition control modules.

S-21 Checking Flame Sensor

Steps for checking the flame sensor for proper combustion proof.

S-22 Checking Flame Rollout Switch

How to test the flame rollout safety switch.

S-23 Heat Exchanger Procedures

Procedures for heat exchanger removal and replacement.

Wiring Diagrams

GUCA Model Wiring Diagram

Electrical wiring diagram for GUCA series furnaces.

GCCA Model Wiring Diagram

Electrical wiring diagram for GCCA series furnaces.

Schematics

Typical Schematic GUCA Model Furnaces

A typical schematic overview of GUCA furnace circuitry.

Typical Schematic GCCA Model Furnaces

A typical schematic overview of GCCA furnace circuitry.

Furnace Twining Kit - FTK03A Schematic

Schematic for the furnace twinning kit.