Troubleshooting: Heating Sequence of Operation (Continued)

HEATING SEQUENCE OF OPERATION

CONTINUED

SEE BOX A

NORMAL OPERATION.

SEE BOX B

THERMOSTAT CALLS FOR HEAT.

 

 

 

 

 

 

 

 

 

 

 

RETURN TO FIRST−STAGE HEAT MODE.

 

 

 

 

 

 

 

 

 

 

 

 

 

FIRST−STAGE CONTINUES UNTIL SECOND−

 

 

 

 

 

 

 

 

 

 

 

 

 

STAGE PRESSURE SWITCH CAN BE PROVEN

 

 

 

SECOND−STAGE (HIGH FIRE) HEAT

 

NO

 

 

YES

 

 

 

 

or HEAT DEMAND IS SATISFIED. A FIVE (5)

 

PRESSURE SWITCH CLOSED?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MINUTE WAIT PERIOD IS INITIATED BEFORE

 

 

 

YES

 

 

 

 

 

 

 

 

RETRY. WERE 5 ATTEMPTS MADE FOR

 

 

 

 

 

 

 

 

 

 

 

 

SECOND−STAGE HEAT?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HEAT DEMAND SATISFIED?

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

 

STATUS LED −− HEARTBEAT.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SEE BOX C

 

 

 

 

 

 

 

 

 

 

 

 

 

FIRST−STAGE HEAT DEMAND SATISFIED?

 

 

 

YES

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SINGLE−STAGE THERMOSTAT MODE

 

 

 

TWO STAGE THERMOSTAT MODE?

 

 

 

 

 

 

 

 

 

 

(DIP SWITCH SET AT

 

 

 

 

(DIP SWITCH SET AT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SECOND STAGE HEAT

 

 

GAS VALVE OFF, COMBUSTION AIR

 

 

YES

FIRST AND SECOND STAGE HEAT

 

NO

 

DEMAND SASTISFIED?

 

 

INDUCER OFF AFTER 5−SECOND

 

 

DEMAND SATISFIED SIMULTANEOUSLY.

 

 

STATUS LED −− HEARTBEAT.

 

 

 

 

 

 

 

 

LOW SPEED POST PURGE PERIOD,

 

 

 

 

STATUS LED −− HEARTBEAT.

 

 

 

 

 

 

 

 

 

 

INDOOR BLOWER OFF DELAY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INITIATED ON LOW HEAT SPEED.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

STATUS LED −− HEARTBEAT.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GAS VALVE, COMBUSTION AIR INDUCER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AND INDOOR BLOWER RETURN TO FIRST−

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

STAGE OPERATION.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

STATUS LED −− HEARTBEAT.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FIRST STAGE HEAT DEMAND SATISFIED?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DEMAND FOR HEAT SATISFIED.

 

 

 

 

 

 

 

 

GAS VALVE OFF. COMBUSTION AIR INDUCER

 

 

 

 

 

 

 

 

 

 

OFF AFTER 5−SECOND LOW SPEED POST−

 

 

POWER ON STAND BY.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PURGE PERIOD. INDOOR BLOWER OFF.

 

 

STATUS LED −− PULSE.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DELAY INITIATED ON LOW HEAT SPEED.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

STATUS LED −− PULSE.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 60

Page 60
Image 60
Lennox International Inc Gas Units, G61MP Series Units installation instructions Or Heat Demand is SATISFIED. a Five

G61MP Series Units, Gas Units specifications

Lennox International Inc. has established itself as a leader in the heating and cooling industry, and its G61MP Series Gas Units stand as a testament to the company's commitment to innovation and energy efficiency. These gas units are specifically designed for residential applications and are recognized for their reliability, performance, and advanced technology.

One of the main features of the G61MP Series is its variable speed motor, which offers significantly enhanced comfort over traditional single-stage gas units. This technology allows for precise temperature control and improved humidity management. By adjusting its speed according to the heating demand, the unit minimizes temperature fluctuations, leading to a more consistent indoor climate.

Another notable characteristic of the G61MP Series is its ECM blower motor, which operates quietly and efficiently. This motor not only reduces energy consumption but also enhances the overall comfort of the home by providing a steady flow of warm air without the disruptive noise often associated with traditional gas units.

The G61MP Series units are designed with a focus on energy efficiency, boasting an impressive Annual Fuel Utilization Efficiency (AFUE) rating. This rating indicates that these units convert a significant portion of the fuel they consume into usable heat, resulting in lower energy bills for homeowners. The units are equipped with a modulating gas valve that further optimizes fuel usage by adjusting the gas flow according to the heating needs of the home.

Safety is a paramount consideration in the design of the G61MP Series. These units are built with advanced safety features, including a self-diagnostic control system that continuously monitors the unit’s performance. This system alerts homeowners to any potential issues, allowing for proactive maintenance and ensuring the longevity of the equipment.

The G61MP Series is also designed for ease of installation and servicing. Its compact design allows for flexible placement in various home environments, while the user-friendly access panels simplify routine maintenance tasks.

In conclusion, Lennox International Inc.'s G61MP Series Gas Units deliver a combination of advanced technology, energy efficiency, and reliability, making them an excellent choice for homeowners looking to enhance their heating systems. With features designed to maximize comfort, minimize energy costs, and ensure safety, these units represent a significant advancement in residential heating solutions.