Nordyne M3RL Series installation instructions Conversion, Leak Check, High Altitude Derate

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Main

 

Blower

 

Control

 

Board

 

Inducer

 

Burner

 

Box

 

Gas

 

Valve

 

Floor

 

 

Alt. Gas

To Gas

Line Entry

Supply

 

Figure 22. Typical Gas Piping

If the test pressure is less than or equal to 1/2 psig (14 in. water column), the furnace must be isolated from the gas supply line by closing the manual shut-off valve.

Leak Check

After the gas piping to the furnace is complete, all connections must be tested for gas leaks. To check for leaks use only a soap and water solu- tion or other approved method.

High Altitude Derate

The nameplate input rating for the furnaces apply for elevations up to 4,000 feet above sea level for US and Canada. If the elevation for the furnace location is higher than 4,000 feet above sea level, the furnace input must be derated by using the appropriate orifice size listed in Table 8.

NOTE: The density of air decreases with in- creasing elevation above sea level. This re- duces the quantity of combustion air drawn into the furnace under normal operation and requires the unit be derated by using smaller gas orifices or lower manifold pressure.

CONVERSION

This furnace can be converted from the fac- tory-equipped gas to either natural gas (for LP gas ready models), or LP gas (for natural gas ready models). Conversions must be made by qualified service personnel, using only factory authorized or approved parts. The required conversion orifices are supplied with the fur- nace.

!WARNING:

DO NOT REMOVE OR DEFACE THE ORIGINAL RATING PLATE.

!CAUTION:

The gas supply shall be shut off prior to disconnecting the electrical power, before proceeding with the conversion.

To Turn Off Fuel Supply to the Appliance:

1.Set the room thermostat to “OFF” or its lowest temperature setting.

2.Turn OFF the main gas supply to the appli- ance at the manual valve, outside of the appliance casing.

3.Remove the control access panel / lou- vered door.

4.Move the appliance gas valve lever/knob to the “OFF” position.

5.Turn OFF the electrical power to the appli- ance.

CAPACITY OF BLACK IRON GAS PIPE (CU. FT. PER HOUR)

FOR NATURAL GAS (SPECIFIC GRAVITY - 0.60)

NOMINAL

 

 

LENGTH OF PIPE RUN

 

 

BLACK IRON

 

 

 

 

(feet)

 

 

 

 

PIPE DIAMETER

 

 

 

 

 

 

 

 

 

 

(in.)

10

20

30

40

 

50

60

 

70

80

1/2

130

90

75

65

 

55

50

 

45

40

3/4

280

190

150

130

 

115

105

 

95

90

 

1

520

350

285

245

 

215

195

 

180

170

1

1/4

1050

730

590

500

 

440

400

 

370

350

1

1/2

1600

1100

890

760

 

670

610

 

560

530

The cubic feet per hour listed in the table above must be greater than the cubic feet per hour of gas flow required by the furnace.

To determine the cubic feet per hour of gas flow required by the furnace, divide the input rate of the furnace by the heating value of the gas:

Cubic Feet

=

Input To Furnace (Btu/hr)

Per Hour Required

Heating Value of Gas (Btu/Cu. Ft.)

Table 7. Capacity of Black Iron Gas Pipe (cu. ft. per hour) for Natural Gas (specific gravity = .60)

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Contents Installation Instructions Page L 060 a a W Table of ContentsFurnace Specifications/Airflow Data Shipping WeightGeneral Top ViewGeneral Description Owner InformationManufacturer WARRANTY, OWNER’S Responsibilities Installation StandardsLocation Circulating AIR SupplyMinimum Clearances Return AIR Provisions Duct ConnectorsDucted Return AIR Closet or AlcoveDuct Connector Selection Duct InstallationAIR Distribution Systems Installing Screw Down Duct CON- Nector Installing Platinum Series 14 Round Duct ConnectorCUT Duct Opening Finger Tabbed only Screw Down Platinum SeriesAlternate Attachment Methods Installing Finger Tabbed Duct CON- NectorsInstall Furnace Venting and Combustion AIR RequirementsGeneral Furnace Must not be Common Vented with Other Appliances Venting RequirementsVent Termination Clearances for Direct Vent Furnaces Vent TableVent Pipe Material Vent Pipe InstallationHorizontal Venting Downflow FurnaceHorizontal Venting Drainage of Condensate from Furnace Alternate Horizontal Vent InstallationGAS Supply and Piping Furnace with Condensate Drain Trap AssemblyLeak Check ConversionHigh Altitude Derate To Turn Off Fuel Supply to the ApplianceTo Remove the Burner Orifices To Remove the Burner AssemblyTo Convert the Unit to the Alternate Gas Approximate Orifice Size for Natural and LP GasesConvertible Pressure Regulator Cap Lighting and Adjustment of the ApplianceLine Voltage Wiring Electrical WiringType of Fuel Manifold Pressure Completing the ConversionElectrical Data Low Voltage WiringSTART-UP and Adjustments Start-Up ProcedureVentilation Shut Down Procedure Sequence of OperationVerifying Firing Rate Description of Components Verifying Operation of the Supply Air Limit SwitchGas Flow Rate Verifying Burner OperationAccessory Kits MaintenanceCombustion Air and Vent System Air FilterSystem Operation Information Condensate Drain AssemblyLubrication Blower CompartmentFurnace Fails to Operate Cooling ModeM3 Downflow Furnace Downflow Furnace Wiring Diagram Page Fuel Type INSTALLATION/PERFORMANCE Check List¢7082197¤

M3RL Series specifications

The Nordyne M3RL Series is a cutting-edge line of residential heating and cooling systems designed to enhance home comfort while emphasizing energy efficiency and reliability. Engineered with the latest technologies, the M3RL Series stands out as a premier choice for homeowners seeking optimal climate control, advanced features, and quiet operation.

One of the standout characteristics of the Nordyne M3RL Series is its high-efficiency performance. With Seasonal Energy Efficiency Ratios (SEER) that surpass industry standards, these systems deliver exceptional cooling power while using less energy. This efficiency not only translates to lower utility bills but also reduces the environmental footprint, making the M3RL Series an eco-friendly option.

Incorporating advanced inverter technology, the M3RL Series units operate at varying speeds, allowing them to adjust cooling and heating output to match the current demand. This feature ensures consistent temperature control while minimizing energy consumption. The systems are also equipped with a variable-speed compressor, which works in harmony with the inverter technology to provide seamless operation and quiet performance.

The M3RL Series showcases durability through its robust construction. The outdoor units feature a powder-coated finish to withstand the elements, while the indoor components are designed with high-quality materials to ensure longevity. The environmentally friendly refrigerant used in these systems further emphasizes Nordyne's commitment to sustainability.

Another notable aspect is the advanced control options available with the M3RL Series. Homeowners can choose from various thermostat solutions, including smart thermostats that offer remote control capabilities and programming features. This flexibility allows users to optimize their heating and cooling schedules, enhancing both comfort and efficiency.

In terms of installation, the M3RL Series is designed with versatility in mind. The compact and lightweight design of the units ensures ease of placement in various home layouts, while the comprehensive installation manuals and support from Nordyne make the process straightforward for HVAC professionals.

The Nordyne M3RL Series is truly a hallmark of modern home climate control, embodying efficiency, durability, and advanced technology. With its combination of high-performance features, user-friendly controls, and a commitment to sustainability, it provides an ideal solution for homeowners looking to enhance comfort while reducing energy costs. The M3RL Series represents a significant step forward in the evolution of residential heating and cooling systems.