Carrier 58MVP instruction manual Appendix G, Thermostat Staging Algorithm

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Appendix G

Thermostat Staging Algorithm

·Unit Default: Algorithm is initiated with Low Heat for 16 minutes. If call for heat still exists, unit transfers into High Heat until thermostat is satisfied.

·Low Heat run time is calculated based on previous heating cycle.

·High Heat on time is not calculated. High Heat is energized 1 of 3 ways and runs until thermostat has been satisfied.

1.After Low Heat has run for 16 minutes and call for heat is still present.

2.When algorithm does its calculation of previous cycle and determines High Heat is necessary.

3.After the amount of calculated Low Heat on time has elapsed and there is still a call for heat present.

·The following flowchart shows how the algorithm calculates low heat on times. To use calculations, the amount of time unit ran in Low Heat (LH) and High Heat (HH) during previous cycle must be known. The algorithm uses these values to decide which stage of heat should be initiated on next call for heat.

·Four examples also follow illustrating what the unit will do on a cold start, coming out of night setback, coming on in low fire, and coming on in high fire.

EXAMPLE 1:

 

Furnace ran for 16 minutes in Low Heat and 5 minutes in High Heat.

LH = 16

 

 

HH = 5

 

 

Calculate: (228 X 16) + (350 X 5) = 5398

3648 ¬ 5398 ¬ 5600 ⇒ therefore calculate next cycle Low Heat run time.

LHrun time =

5600 − 5398

= 1.6 ⇒ therefore during next cycle, unit will run for 2 minutes in Low Heat and then switch to High

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Heat if a call for heat is still present.

EXAMPLE 2:

Furnace ran for 16 minutes in Low Heat and 10 minutes in High Heat. LH = 16

HH = 10

Calculate: (228 X 16) + (350 X 10) = 7148

7148 - 5600 ⇒ therefore next cycle will be initiated in High Heat. Low Heat run time is 0 minutes.

EXAMPLE 3:

Furnace ran for 13 minutes in Low Heat (LH) and 5 minutes in High Heat (HH). This will happen if control algorithm calculated maximum Low Heat run time be 13 minutes based on a previous cycle.

LH = 13

HH = 5

Calculate: (228 X 13) + (350 X 5) = 4714

3648 ¬ 4714

¬ 5600 ⇒ therefore calculate the next cycle Low Heat run time.

LHrun time =

5600 − 4714

= 7.26 ⇒ therefore unit will run for 7 minutes in Low Heat and then switch to High Heat if a call for

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heat is still present.

EXAMPLE 4:

Furnace ran for 0 minutes in Low Heat and 10 minutes in High Heat. LH = 0

HH = 10

Calculate: (228 X 0) + (350 X 10) = 3500

3500 ¬ 3648 ⇒ therefore next cycle will be initiated in Low Heat up to 16 minutes maximum, then switch to High Heat if a call for heat is still present.

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Contents Troubleshooting Guide Example Start Here SectionÐCooling Mode ÐVariable Speed Furnace Control ÐWith DE Connection Lowed by the lowest number fault code. Example 13, 13 Service → ÐService Label/Fault Code Instructions Status Code ExampleStep Action YES GO to ÐAir Conditioning A/C Airflow Setup Switch Position LEDs 1, 2, 3, or 4 on Solid Solid means on continuously Step Action YES GO to Fault Code Motor MTR2 →44 Page Lowed by the lowest number fault code. Example 14, 14 Fault Code ÐContinuous Fan CF Airflow Setup Switch Position ÐTwo-Speed AC/HP Airflow Requirements CFMPage · LOW Heat Page →18 →40 Utes 14ÐIGNITION Lockout Ber indicated in Index for Fault Code →26 Turn power off Is inducer blower wheel okay? 55 ¬ Rpmrpm highlow ¬ →20 Index for Fault Code Cleanup and START-UP Instructions Appendix a Board Layout and SchematicControl Center Wiring Schematic Schematic DiagramAppendix C Pressure Check DiagramAppendix B Isolation CircuitsQuick Motor Test Procedure Appendix D→33 →59 Appendix E Example AIR Delivery Curve ÐAir Delivery CurveÐ100-20 Air Delivery CurvesAir Delivery Curve Ð Air Delivery CurveÐ120-20Upflow Total Static Pressure Reading Locations Static Pressure Reading Location DiagramsBasement Ð Upflow Application Closet Ð Downflow ApplicationAttic Ð Horizontal Application Duct Static Check Sheet Appendix F Quick Reference InformationAppendix G Thermostat Staging AlgorithmVariable Speed Condensing Furnace Algorithm Service Training
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58MVP specifications

The Carrier 58MVP is a high-efficiency gas furnace designed for optimal performance and energy savings. This model represents Carrier's commitment to innovative engineering and advanced technology, making it a preferred choice for homeowners seeking reliable heating solutions.

One of the standout features of the 58MVP is its impressive Annual Fuel Utilization Efficiency (AFUE) rating, which can reach up to 96 percent. This high AFUE rating indicates that the furnace uses less energy to produce heat, leading to lower utility bills and a reduced carbon footprint. The furnace is equipped with a two-stage gas valve that allows it to operate on a low setting during mild weather, providing increased efficiency and comfort.

The 58MVP also features Carrier's Infinity Control system, an advanced programmable thermostat that enables homeowners to customize their heating preferences. This system allows for precise temperature control and scheduling, ensuring that the home remains at a comfortable temperature while minimizing energy consumption.

In addition to its efficiency, the 58MVP is designed with noise reduction technology, including a quiet operating blower and insulated cabinet. This reduces operational sound, allowing for a more peaceful home environment. The model's multi-speed blower motor enhances comfort by providing consistent airflow and further optimizing efficiency.

Durability is a key characteristic of the Carrier 58MVP. It has a stainless-steel heat exchanger that promotes longevity and performance. The furnace is also equipped with a galvanized steel cabinet featuring a powder-coated finish, which protects against rust and corrosion.

The 58MVP is compatible with Carrier's advanced air purification systems, optimizing indoor air quality while heating. With features designed for efficiency, comfort, and durability, the Carrier 58MVP is an exceptional choice for homeowners looking to enhance their heating systems. The combination of advanced technologies, such as the two-stage operation and Infinity Control, positions this furnace as a leader in the market, meeting the needs of today's energy-conscious consumers. Ideal for both new constructions and retrofits, the Carrier 58MVP continues to set the standard for residential heating solutions.
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