Amana GUIA140A50 User Manual

RS6620002
Revision 2
December 1998
Service
Instructions
40" 80% Gas Furnaces
GUIA, GCIA, GUIB, GCIB, GUIC, GCIC
GUID, GUIS, GCIS, GUIV & Accessories
Model and Manufacturing
numbers listed on page 4&5
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
procedures done by an unqualified person.
A
higher standard of comfor
t
Heating
n
Air Conditioning
®

Amana GUIA140A50 Specifications

General

Brand	Amana
Model	GUIA140A50
Category	Furnace
Language	English

Summary

Service Instructions

Safety and Operating Instructions

What to Do If You Smell Gas

Emergency procedures to follow in case of a gas leak.

Operating Instructions

To Turn Off Gas to Appliance

Furnace Specifications

Combustion and Ventilation Air Requirements

Air Requirements

Details on necessary air supply for combustion and ventilation.

Product Design - Gas Supply

Gas Supply and Piping

Guidelines for connecting natural gas supply and piping.

Product Design - Gas Piping Details

Connecting the Gas Piping - Natural Gas

Specific rules for installing natural gas piping.

Checking the Gas Piping

Tanks and Piping - Propane Units

Requirements for propane gas tanks and piping systems.

System Operation

Sequence of Operation

Describes the normal heating sequence for integrated ignition controls.

System Operation - Abnormal Operation

Abnormal Operation (Models with White-Rodgers 50A50 or Heatcraft HSI 1-1A Integrated Ignition Control)

Troubleshooting common operating faults for HSI 1-1A controls.

Abnormal Operation (Models with Heatcraft HSI-2 Integrated Ignition Control)

Troubleshooting common operating faults for HSI-2 controls.

Abnormal Operation (Models with White-Rodgers 50A52 Radiant Sense Ignition Control)

Troubleshooting faults for 50A52 Radiant Sense ignition controls.

Abnormal Operation (GUIV Variable Speed Two Stage Models with White Rodgers 50A51-255 Integrated Ignition Control)

Troubleshooting faults for GUIV variable speed furnaces.

System Operation - Sequence of Operation

Sequence of Operation (GUIS & GCIS Two Stage Models with White-Rodgers 50A51-215 Integrated Ignition Control)

Normal operating sequence for GUIS/GCIS two stage furnaces.

System Operation - Operating Instructions

Operating Instructions

Step-by-step guide for normal furnace operation.

Maintenance

Annual Inspection

Recommended annual inspection checklist for furnace service.

Air Filter

Importance of air filters and maintenance schedule.

Maintenance - Specific Procedures

Servicing

Heating Performance Test

Procedure for conducting a heating performance test.

Servicing - Electrical Checks

S-1 Checking Voltage

Procedure to check furnace voltage supply.

S-2 Checking Wiring

Visual inspection and continuity check of furnace wiring.

S-3 Checking Thermostat, Wiring, and Anticipator

Troubleshooting thermostat and anticipator circuits.

S-3A Thermostat and Wiring

Detailed steps for checking thermostat and wiring.

Servicing - Component Checks

S-4 Checking Transformer and Control Circuit

Procedure to check the transformer and control circuit.

S-5 Checking Primary Limit Control

Procedure to test the primary limit control.

Servicing - Limit Controls

S-6 Checking Auxiliary Limit Control

Procedure to test the auxiliary limit control.

Servicing - Switches and Controls

S-7 Checking Flame Rollout Switch

Procedure to test the flame rollout switch.

S-8 Checking Pressure Switch

Procedure to test the pressure switch.

Servicing - Pressure and Blower Checks

S-9 Checking Air Circulator Blower Motor or Induced Draft Blower Motor

Troubleshooting procedures for blower motors.

Servicing - Motor and Capacitor Checks

S-10 Checking Capacitor

Procedure to check the motor run capacitor.

S-10A Resistance Check

Method to test capacitor resistance.

Servicing - Electrical Component Checks

S-10B Capacitance Test

Method to test capacitor capacitance.

S-11 Checking Gas Valve (Redundant)

Procedure to test the redundant gas valve.

S-12 Checking Hot Surface Ignitor

Procedure to test the hot surface ignitor.

S-13 Checking White-Rodgers 50A50 or 50A51 and Heatcraft HSI 1-1A or HSI 2 Integrated Ignition Control Module

Testing White-Rodgers and Heatcraft ignition control modules.

Servicing - Ignition Control Module

S-13A Checking WR50A52 Integrated Ignition Control Module (Radiant Sense)

Testing the WR50A52 radiant sense ignition control.

Servicing - Flame Sensor

S-14 Checking Flame Sensor - Flame Rectification - Ignition Control Module

Servicing - Burner and Sensor Checks

S-14A Models with WR50A52 Ignition Control & Radiant Sense Flame Sensor

Servicing - Orifice and Altitude Adjustments

Servicing - Gas Pressure

S-18 Checking Gas Pressure

Servicing - Gas Pressure Adjustment

Gas Manifold Pressure Measurement and Adjustment

Gas Valve Adjustment Procedures for GUIS/GCIS/GUIV Two-Stage Furnaces

Servicing - Gas Adjustments and Ignition Issues

Propane Gas Adjustments

Servicing - Airflow and Temperature