BLUE

BLUE

SUPPLY AIR

FLAME ROLL-OUT

LIMIT SWITCH

SWITCH

(ALL MODELS)

(ALL MODELS)

BLUE

BLUE

ORANGE

ORANGE

WHITE (NEUTRAL)

BLACK 120V

GROUND

ROOM THERMOSTAT

VENT

SAFETY

SWITCH

(ALL MODELS)

WHITE

GREEN

PRESSURE

SWITCH

BLACK

ON/OFF SWITCH

R

Y

G

W

AIR CONDITIONER

CONDENSING UNIT

C

Y

FLAME SENSOR

RED

BLOWER DECK SWITCH

TRANSFORMER

 

WHITE W/ BLK STRIPES

WHITE

24 V

120 V

BLK W/ WHITE STRIPES

BLACK

180 120 90 60

BLACK

3 OR 4 SPEED MOTOR

GAS

VALVE

Legend

Field Wiring

Factory Wiring:

Low Voltage

High Voltage

YELLOW

BROWN

IGNITOR

BLACK

BLACK

R

C

BLACK

INDUCER

BLACK

 

 

C

 

 

 

 

 

 

 

H

 

 

 

 

 

MH

 

 

 

L

ML

 

 

 

 

 

 

 

 

WHITE

RED

ORANGE

BLUE

BLACK

RED

1

 

 

 

 

 

 

 

 

 

ORANGE

2

 

 

 

 

 

 

 

 

 

BLUE

3

 

 

 

 

 

 

 

 

 

BLACK

4

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

WHITE

6

 

 

 

 

 

 

 

 

 

 

STATUS

FAULT CONDITION

RED

LIGHT

 

Power On

ON

Limit Circuit Open or External Load On "W"

1 FLASH

(Does not apply to Deck Switch, see below)

 

Pressure Switch Open with Inducer On

2 FLASHES

Pressure Switch Closed with Inducer On

3 FLASHES

Ignition Failure (Check Ground)

4 FLASHES

115 VAC & Neutral Reversed or no Ground

5 FLASHES

False Flame or Gas Valve Relay Shorted

Continuous

Power Off or Deck Limit Open

OFF

 

FLAME

 

FAULT CONDITION

YELLOW

LIGHT

Low Flame Sensor Signal

Continuous

 

Flash

Flame Present

ON

 

 

 

MOTOR

 

If any of the original

PLUG

 

 

 

 

with

Factory Wired

the furnace must be

Heating Speeds

replaced, it must be

 

 

replaced

wiring

Furnace

Wire

material having a

Input, Btuh

Color

 

rating of

 

 

 

60,000

Red

at least

˚ C.

 

Use copper

80,000

Blue

 

 

conductors

 

 

only.

 

 

 

 

WD #710240B

Figure 30. Downflow Furnace Wiring Diagram

33

Page 33
Image 33
Nordyne M3RL Series installation instructions Downflow Furnace Wiring Diagram

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.