Lennox International Inc G61MP specifications

Page 23

3 − To the extent that it is practical, close all building doors and windows and all doors between the space in which the appliances connected to the venting system are lo- cated and other spaces of the building.

4 − Close fireplace dampers.

5 − Turn on clothes dryers and any appliances not con- nected to the venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan.

6 − Follow the lighting instruction to place the appliance being inspected into operation. Adjust thermostat so appliance will operate continuously.

7 − Test for spillage of flue gases at the draft hood relief opening after 5 minutes of main burner operation. Use the flame of match or candle, or smoke from a ciga- rette, cigar.

8 − If improper venting is observed during any of the above tests, the venting system must be corrected or sufficient combustion/make-up air must be provided. The venting system should be re-sized to approach the minimum size as determined by using the ap- propriate tables in appendix G in the current standards of the National Fuel Gas Code ANSI−Z223.1/NPFA 54 in the U.S.A., and the appropriate Natural Gas and Propane appliances venting sizing tables in the cur- rent standard of the CSA−B149 Natural Gas and Pro- pane Installation Codes in Canada.

9 − After determining that each appliance remaining connected to the common venting system properly vents when tested as indicated in step 3, return doors, windows, exhaust fans, fireplace dampers and any other gas-burning appliance to their previous condition of use.

General Guidelines for Vent Terminations for Non-Direct Vent Installations.

In Non-Direct Vent applications, combustion air is taken

from indoors and the flue gases are discharged to the out-

doors. The G61MP is then classified as a non-direct vent,

Category IV gas furnace. In Non-Direct Vent applications, the vent termination is limited by local building codes. In

the absence of local codes, refer to the current National Fuel Gas Code ANSI Z223−1/NFPA 54 in U.S.A., and cur- rent CSA−B149 Natural Gas and Propane Installation

Codes in Canada for details.

Position termination end according to location given in fig- ure 19. In addition, position termination end so it is free

from any obstructions and above the level of snow accu- mulation (where applicable). The termination should be at least 12 inches (305mm) from any opening through which flue products could enter the building.

At vent termination, care must be taken to maintain protective coatings over building materials (prolonged exposure to exhaust condensate can destroy protective coatings). It is recommended that the exhaust outlet not be located within 6 feet (1.8m) of a condensing unit because the condensate can damage the painted coating.

NOTE − If winter design temperature is below 32°F (0°C), exhaust piping should be insulated with 1/2" (13mm), Ar- maflex or equivalent when run through unheated space. Do not leave any surface area of exhaust pipe open to out- side air; exterior exhaust pipe should be insulated with 1/2" (13mm) Armaflex or equivalent. In extreme cold climate areas, 3/4" (19mm) Armaflex or equivalent may be neces- sary. Insulation on outside runs of exhaust pipe must be painted or wrapped to protect insulation from deterioration. Exhaust pipe insulation may not be necessary in some specific applications.

NOTE − During extremely cold temperatures, below approximately 20°F (6.7°C), units with long runs of vent pipe through unconditioned space, even when insulated, may form ice in the exhaust termination that prevents the unit from operating properly. Longer run times of at least 5 minutes will alleviate most icing problems. Also, a heating cable may be installed on exhaust piping and termination to prevent freeze−ups. Heating cable installation kit is avail- able from Lennox. See Condensate Piping section for part numbers.

IMPORTANT

Do not use screens or perforated metal in exhaust terminations. Doing so will cause freeze−ups and may block the terminations.

IMPORTANT

For Canadian Installations Only:

In accordance to CSA International B149 installation codes, the minimum allowed distance between the combustion air intake inlet and the exhaust outlet of other appliances shall not be less than 12 inches (305mm).

Page 23

Page 22 Page 24
Image 23
Page 22 Page 24
Contents G61MP Table of ContentsAfue SpecificationsOptional Accessories − Must be Ordered Extra Direct Vent G61MP−36B−045 Performance Less Filter Blower Data1495 2340 1285 1385 2410 Sight Blower Glass AssemblyG61MP Parts Arrangement TOP CAPIntegrated Control Board A92 Door Interlock Switch S51Circuit Breaker CB8 −Control Box Control Transformer T1Page Integrated Control Board 5 Pin Terminal TWO−STAGE Integrated Control BoardIntegrated Control Board Terminals 120VAC Neutral 120VAC LineSupply AIR Blower −Blower Compartment Blower Motor B3 and Capacitor C4Secondary Limit Controls S21 DS1 DS2 DescriptionIgnitor Bracket Burners Front View Burners TOP View −Heating Components Flame SensorIgnitor Burners FigurePrimary Limit Control S10 Flame Rollout Switches S47Combustion Air Inducer Prove Switch S18 Clamshell Heat ExchangerFirst stage Negative Pressure Second stage Positive Dual Combustion AIR Prove SwitchCAI & Cold END Header BOX Assembly Combustion Air Inducer B6 Outdoor Termination Kits and Corresponding Equivalencies II−PLACEMENT and Installation−Vent Piping Guidelines Maximum Vent Pipe Lengths −PVC Joint Cementing ProcedureMinimum Vent Pipe Lengths Upflow or Downflow Direct or NON-DIRECT Vent Applications − Venting PracticesTypical Exhaust Pipe Connections Reducer Direct Vent applications where combustion air is takenFrom indoors and flue gases are discharged outdoors Reducer PlugSweep ELL Carbon Monoxide Poisoning HazardPage − G61MP Vent Termination − AIR Inlet of Other Appliance Exhaust Pipe Termination Size Reduction Side View Front ViewG61MP Direct Vent Application Using Existing Chimney ANGLE−CUT in DirectionSide View NON−DIRECT Vent Wall Ring Termination G61MP NON−DIRECT Vent Application Using Existing ChimneyCondensate Piping −RINGS CAP HI/LO Screws Condensate AssemblyVent Nipple TEE Screw Coupling CLEAN−OUT Access Hose clamp−Heating Start-Up For Your Safety Read Before Operating−Preliminary and Seasonal Checks −Extended Period Shutdown −Safety or Emergency ShutdownIV−HEATING System Service Checks A−C.S.A. Certification −Testing Gas Piping− Proper Combustion −Testing Gas Supply Pressure−Check Manifold Pressure − Proper Gas Flow Approximate− Condensate pH Range − High Altitude−External Static Pressure −Flame Signal−Temperature Rise −Blower Speed Taps VI−MAINTENANCEPage Page VII− Wiring and Sequence of Operation Sequence of Operation On Next Heating Sequence of Operation Normal Operation DS1 and DS2 Simultaneous Slow Flash YES See BOX a LOW Flame Signal YESEN or Heat Demand is SATISFIED. a Five Cooling Sequence of Operation Continuous LOW Speed FAN Sequence of Operation TWO VIII− Field Wiring Applications and Jumper SettingsSingle Transformer Cool− Diagnostic lights flash the roll−out − Both diagnostic lights fail to light upLED#2−Off Miswiring of furnace or improper con Door interlock switch failureConnections at limit switches Uous fan demand Primary, secondary or backup secon− Diagnostic lights flash the limit failure mode LED#1−Slow Flash Miswiring of furnace or improperProve switch does not close due to a Switch failure code 2.5 minutes afterLED#1−Off Prove switch lines damaged Condensate in prove switch line− After 5 tries the control diagnostics Terminating the unit − Diagnostic lights flash the pressureSwitch code With a heating demand Installed− Combustion air inducer energizes − Roll−out switch trips during− Diagnostic lights flash roll−out fail Fails to stay lit Operation. Problem is characterizedSensor rod is contaminated Mode Er motorNostic lights flash low flame sense Burner LED#1−Slow FlashService Notes

G61MP specifications

Lennox International Inc. has long been a leader in HVAC solutions, and the G61MP gas furnace exemplifies the company's commitment to innovation and energy efficiency. This high-efficiency gas furnace operates with an Annual Fuel Utilization Efficiency (AFUE) of up to 96%, allowing homeowners to save significantly on energy costs while maintaining a comfortable indoor environment.

One of the primary features of the G61MP is its modulating gas valve. This technology enables the furnace to operate at multiple levels of heating output, ensuring that it can adjust its performance according to the home’s heating demands. By modulating the heating output, the G61MP maximizes efficiency and minimizes energy waste, providing a consistent temperature and improved comfort.

The G61MP also incorporates advanced two-stage heating, which enhances its performance by reducing temperature fluctuations in the home. This feature is especially beneficial during transitional weather periods when heating needs may vary widely. With its ability to operate on a lower stage most of the time, the furnace can produce quieter operation and reduced energy consumption.

In terms of design, the G61MP includes a sealed combustion chamber that draws air from outside the home for combustion, enhancing safety and efficiency. This design feature eliminates the need for indoor air, improving indoor air quality. The furnace is also equipped with a high-efficiency ECM blower motor that not only boosts comfort but operates quietly and uses less electricity compared to traditional motors.

Further enhancing its efficiency, the G61MP utilizes a variable-speed blower, which allows for precise control of airflow throughout the home. This results in better humidity control and improved air distribution, providing an overall more comfortable environment.

The Lennox G61MP is compatible with the iComfort S30 smart thermostat, allowing homeowners to control their heating remotely, adjust settings based on their schedules, and access energy usage data. This connectivity transforms the G61MP into an integral part of a smart home ecosystem, facilitating energy conservation and comfort optimization.

Lastly, the G61MP is designed with durability in mind. Its robust construction and high-quality materials ensure reliable performance and lengthy service life. Homeowners can feel assured that they are investing in a heating solution that will meet their needs for many winters to come. In summary, the Lennox G61MP gas furnace stands out with its high efficiency, advanced technology, and user-friendly features, making it a top choice for homeowners seeking exceptional heating performance.
Top Page Image Contents