Instruction manual

ManualsBrandsAmana ManualsFurnaceGCI

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CUIT DESCRIPTICUIT DESCRIPTI

CUIT DESCRIPTI

GENERAL

A number of safety circuits are employed to ensure safe and proper

furnace operation. These circuits serve to control any potential safety

hazards and serve as inputs in the monitoring and diagnosis of ab-

normal function. These circuits are continuously monitored during

furnace operation by the integrated control module.

INTEGRATED CONTROL MODULE

The integrated control module is an electronic device which controls

all furnace operations. Responding to the thermostat, the module

initiates and controls normal furnace operation, and monitors and

addresses all safety circuits. If a potential safety concern is detected,

the module will take the necessary precautions and provide diag-

nostic information through an LED.

PRIMARY LIMIT

The primary limit control is located on the partition panel and moni-

tors heat exchanger compartment temperatures. It is a normally-

closed (electrically), automatic reset, temperature-activated sensor.

The limit guards against the overheating as a resulting of insufficient

conditioned air passing over the heat exchanger.

AUXILIARY LIMIT

The auxiliary limit control is located either on or near the circulator

blower and monitors heat exchanger compartment temperatures.

The control is a normally-closed (electrically), manual-reset, tem-

perature activated sensor. It guards against overheating resulting

from insufficient conditioned air passing over the heat exchanger.

ROLLOUT LIMITS

The rollout limit controls are mounted on the burner/manifold as-

sembly and monitor the burner flame. They are normally-closed

(electrically), manual-reset, temperature-activated sensors. This limit

guards against burner flames not being properly drawn into the heat

exchanger.

PRESSURE SWITCHES

The pressure switches are normally-open (closed during operation),

single-pole single-throw, negative air pressure-activated switches.

They monitor the airflow (combustion air and flue products) through

the heat exchanger via pressure taps located on the induced draft

blower. These switches guard against insufficient airflow (combus-

tion air and flue products) through the heat exchanger.

FLAME SENSOR

The flame sensor is a probe mounted to the burner/manifold assem-

bly which uses the principle of flame rectification to determine the

presence or absence of flame.

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ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS

NOTE: Discharge body’s static electricity before touching unit. An

electrostatic discharge can adversely affect electrical components.

Use the following precautions during furnace installation and servic-

ing to protect the integrated control module from damage. By put-

ting the furnace, the control, and the person at the same electro-

static potential, these steps will help avoid exposing the integrated

control module to electrostatic discharge. This procedure is appli-

cable to both installed and uninstalled (ungrounded) furnaces.

1. Disconnect all power to the furnace. Do not touch the

integrated control module or any wire connected to the control

prior to discharging your body’s electrostatic charge to

ground.

2. Firmly touch a clean, unpainted, metal surface of the furnace

away from the control. Any tools held in a person’s hand

during grounding will be discharged.

3. Service integrated control module or connecting wiring

following the discharge process in step 2. Use caution not to

recharge your body with static electricity; (i.e., do not move

or shuffle your feet, do not touch ungrounded objects, etc.).

If you come in contact with an ungrounded object, repeat step

2 before touching control or wires.

4. Discharge your body to ground before removing a new control

from its container. Follow steps 1 through 3 if installing the

control on a furnace. Return any old or new controls to their

containers before touching any ungrounded object.

DIAGNOSTIC CHART

WARNING

O AVOID ELECTRICAL SHOCK, INJURY OR DEATH, DISCONNECT ELECTRICAL

POWER BEFORE PERFORMING ANY SERVICE OR MAINTENANCE.

Refer to the troubleshooting chart on the following pages for assis-

tance in determining the source of unit operational problems. The

red diagnostic LED blinks to assist in troubleshooting the unit. The

number of blinks refer to a specific code.

RESETTING FROM LOCKOUT

Furnace lockout results when a furnace is unable to achieve ignition

after three attempts, or when it has lost flame five times during a

single call for heat. It is characterized by a non-functioning furnace

and a one flash diagnostic LED code from the red LED. If the fur-

nace is in “lockout”, it will (or can be) reset in any of the following

ways.

1. Automatic reset. The integrated control module will

automatically reset itself and attempt to resume normal

operations following a one hour lockout period.

2. Manual power interruption. Interrupt 115 volt power to the

furnace for 0 - 20 seconds.

3. Manual thermostat cycle. Lower the thermostat so that there

is no longer a call for heat for 0 -20 seconds then reset to

previous setting.

NOTE: If the condition which originally caused the lockout still exists,

the control will return to lockout. Refer to the Diagnostic Chart for

aid in determining the cause.

XVI. MAINTENANXVI. MAINTENAN

XVI. MAINTENAN

CECE

WARNING

O AVOID ELECTRICAL SHOCK, INJURY OR DEATH, DISCONNECT ELECTRICAL

POWER BEFORE PERFORMING ANY MAINTENANCE. IF YOU MUST HANDLE THE

IGNITER, HANDLE WITH CARE.

OUCHING THE IGNITER ELEMENT WITH BARE

FINGERS, ROUGH HANDLING, OR VIBRATION COULD DAMAGE THE IGNITER

RESULTING IN PREMATURE FAILURE.

NLY A QUALIFIED SERVICER SHOULD

EVER HANDLE THE IGNITER.

ANNUAL INSPECTION

The furnace should be inspected by a qualified installer, or service

agency at least once per year. This check should be performed at

the beginning of the heating season. This will ensure that all furnace