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Nordyne MB7BM Series, Installation Instructions Manual

The Nordyne MB7BM Series is a reliable and efficient HVAC unit perfect for your home. For detailed installation instructions and user manual, download the manual for free from 88.208.23.73:8080. Ensure proper installation and maintenance for optimal performance of this high-quality system.

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19

B7VM

a-cabinet

cooling airflow

Heating airflow

a/B Switch Setting

0 = OFF, 1 = ON

cool Switch Setting

0 = OFF, 1 = ON

airflow

(cFM)

a/B Switch Setting

0 = OFF, 1 = ON

Heater Kit 

installed (KW)

airflow

(cFM)

5

6

7

8

0

0

0

0

0

525

0

0

600

0

0

0

0

1

560

0

5

800

0

0

0

1

0

600

0

8

1000

0

0

0

1

1

625

0

10

1000

0

0

1

0

0

700

0

15

1300

0

0

1

0

1

750

0

20

N/A

0

0

1

1

0

800

0

25

N/A

0

0

1

1

1

850

0

30

N/A

0

1

0

0

0

875

0

1

0

0

1

890

0

1

0

1

0

930

0

1

0

1

1

950

0

1

1

0

0

1000

0

1

1

0

1

1050

0

1

1

1

0

1125

0

1

1

1

1

1200

B7VM

B-cabinet

cooling airflow

Heating airflow

a/B Switch Setting

0 = OFF, 1 = ON

cool Switch Setting

0 = OFF, 1 = ON

airflow

(cFM)

a/B Switch Setting

0 = OFF, 1 = ON

Heater Kit 

installed (KW)

airflow

(cFM)

5

6

7

8

1

0

0

0

0

525

1

0

700

1

0

0

0

1

560

1

5

900

1

0

0

1

0

600

1

8

1100

1

0

0

1

1

650

1

10

1100

1

0

1

0

0

700

1

15

1300

1

0

1

0

1

750

1

20

1500

1

0

1

1

0

800

1

25

N/A

1

0

1

1

1

850

1

30

N/A

1

1

0

0

0

875

1

1

0

0

1

950

1

1

0

1

0

1050

1

1

0

1

1

1150

1

1

1

0

0

1250

1

1

1

0

1

1350

1

1

1

1

0

1400

1

1

1

1

1

1600

B7VM

c-cabinet

cooling airflow

Heating airflow

a/B Switch Setting

(* = either 0 or 1)

cool Switch Setting

0 = OFF, 1 = ON

airflow

(cFM)

a/B Switch Setting

(* = either 0 or 1)

Heater Kit 

installed (KW)

airflow

(cFM)

5

6

7

8

*

0

0

0

0

1100

*

0

800

*

0

0

0

1

1200

*

5

1000

*

0

0

1

0

1250

*

8

1200

*

0

0

1

1

1300

*

10

1200

*

0

1

0

0

1350

*

15

1400

*

0

1

0

1

1400

*

20

1600

*

0

1

1

0

1450

*

25

N/A

*

0

1

1

1

1500

*

30

N/A

*

1

0

0

0

1550

noteS:

•  Airflow values listed are for 240V operation. For 208V 

operation, multiply A & B cabinet values by .95; for 
C-cabinet values mulitply by .90

•  When matched with two-stage outdoor units the airflow 

on low (Y1 or W1) input only will be 70% of the values 
shown in this table.

*

1

0

0

1

1600

*

1

0

1

0

1650

*

1

0

1

1

1700

*

1

1

0

0

1750

*

1

1

0

1

1800

*

1

1

1

0

1900

*

1

1

1

1

2000

table 8. airflow data for MB7VM (VSHe) air Handlers

Summary of Contents for MB7BM Series

Page 1: ...nt role as well Pay attention to all safety warnings and any other special notes highlighted in the manual Improper installation of the furnace or failure to follow safety warnings could result in ser...

Page 2: ...ing 11 Turning the Blower Off 11 Blower Configurations 11 Selecting minimum Electric Heat Airflow 11 Determining Nominal System Capacity 11 3 speed Units 11 High Efficiency Units 12 Selecting Basic He...

Page 3: ...ment Do not store any of the following on or in contact with the unit Rags brooms vacuum cleaners or other cleaning tools spray or aerosol cans soap powders bleaches waxes cleaning compounds plastics...

Page 4: ...dbesetintopositionbeforerouting the refrigerant tubing Operation of an Air Handler During Construction CAUTION Failure to follow these instructions will void the factory warranty and may significantly...

Page 5: ...tments must be constructed and installed in accordance with NFPA and SMACNA construction standards Consult with local codes for special requirements For best sound performance be sure to install all t...

Page 6: ...nts air handler INSTALLATION The MB7 Series air handler is shipped ready for vertical upflow installation and is approved for attic basement alcove closetorcrawlspaceinstallationwithzeroclearance to c...

Page 7: ...ne gasket tape to the top of the air handler NOTE The blowers flanged surface is now beneath the air handler and will connect with the supply air duct 4 Carefully place the cased coil on top of the mo...

Page 8: ...ion of the unit in a suspended horizontal application is shown in Figure 5 When mating the blower and coil for horizontal left or right applications reference the upflow instructions on page 6 Make su...

Page 9: ...gures 14 16 Use only copper wire for the line voltage power supply to this unit Use proper code agency listed conduit and a conduit connector for connecting the supply wires to the unit Aluminum suppl...

Page 10: ...erkitforyour unit by referring to the list below or the units rating label A Size Cabinet 15Kw max B Size Cabinet 20Kw max C Size Cabinet 20Kw max 1 Connect the 2 wire plug of the air handler to the m...

Page 11: ...Disconnect all electrical power to the unit and remove the upper door 2 Remove the black and red wires from the blower motor jumping terminal Discard the blower motor jumping terminal Startup Adjustme...

Page 12: ...ch nominal system capacity When operating in the heat pump mode a higher basic airflow setting will increase the energy efficiency and capacitybutwillalsodecreasethesupplyairtemperature For maximum ca...

Page 13: ...eate excessive loads on the motor resulting in higher than normal operating temperatures and shortened service life It is recommended that the blower compartment be cleaned of dirt or lint that may ha...

Page 14: ...mension B Dimension C A 12 3 4 24 3 4 14 1 4 B 12 3 4 24 3 4 17 1 2 C 18 1 4 27 1 2 21 B A 12 7 8 3 4 TYP 1 3 4 1 7 8 K O 3 1 4 1 1 4 C 22 1 1 7 8 3 1 2 5 1 2 2 5 8 1 1 8 K O TYP 1 1 4 2 7 8 TOP VIEW...

Page 15: ...ount Kit Blower Motor Blower Wheel Blower Housing Transformer Control Board Coil Assembly Outlet Heater Box Lower Front Bracket Blower Door Motor Control Board Rear Bracket Front Joining Bracket Figur...

Page 16: ...0 845 780 705 610 530 Corrected ESP1 0 08 0 19 0 31 0 42 0 54 0 65 0 76 Med 1335 1290 1235 1175 1100 1015 925 805 Corrected ESP1 0 10 0 22 0 34 0 46 0 59 0 71 High 1470 1425 1360 1300 1225 1135 1050 9...

Page 17: ...685 0 1 1 0 1095 1040 995 950 900 850 805 750 1 1 1 0 1155 1105 1060 1010 965 920 870 825 0 0 0 1 1230 1185 1140 1090 1045 1010 965 920 1 0 0 1 1285 1260 1210 1165 1125 1080 1040 1010 0 1 0 1 1330 12...

Page 18: ...0 1 0 650 0 0 1 1 2 TON 1300 0 0 1 1 4 TON 700 0 1 0 0 1350 0 1 0 0 750 0 1 0 1 1400 0 1 0 1 800 0 1 1 0 2 5 TON 1450 0 1 1 0 850 0 1 1 1 1500 0 1 1 1 875 1 0 0 0 1550 1 0 0 0 950 1 0 0 1 1600 1 0 0 1...

Page 19: ...0 1 0 0 700 1 15 1300 1 0 1 0 1 750 1 20 1500 1 0 1 1 0 800 1 25 N A 1 0 1 1 1 850 1 30 N A 1 1 0 0 0 875 1 1 0 0 1 950 1 1 0 1 0 1050 1 1 0 1 1 1150 1 1 1 0 0 1250 1 1 1 0 1 1350 1 1 1 1 0 1400 1 1 1...

Page 20: ...1 7 68 1 50 25 70 020H XX 53 1 103 1 60 110 46 5 43 3 89 8 50 45 90 C 2000CFM None 5 5 15 15 5 5 15 15 005H XX 30 30 35 35 26 7 26 7 30 30 008H XX 44 6 44 6 45 45 39 3 39 3 40 40 010H XX 55 55 60 60 4...

Page 21: ...Thermostat Y1 C Y1 W2 Typical 2 Stage Air Conditioner with Variable Speed Air Handler Typical 2 Stage Heat Pump with Variable Speed Air Handler Y2 Y2 Y2 Y2 OUT W E R Air Conditioner Air Handler Air C...

Page 22: ...age Control Board MB7BM Models Figure 11 Two Stage Control Board MB7EM VM Models LED 1 BLWDTC BLWDTC_R HEAT COOL EAC L 1 L 2 P2 R C G W Y 3A Fuse HEATER P1 C R G Y2 Y O 1W 2W 1Y L LED 1 HEATER P1 L 2...

Page 23: ...W C EXPANSION PORT R RED GREEN TEST PORT BLOWER MOTOR RED INPUTS COOL HEAT FAN SPEED OUTPUTS STATUS LIGHTS 2 3 4 5 6 7 8 OFF ON A B GREEN RED STATUS NOT USED TEST PORT BLOWER MOTOR R C Y1 TWIN DEHUM...

Page 24: ...PLUG HOUSING WHEN HEATER KIT NOT INSTALLED BLACK RED WHITE BROWN BROWN BLACK WHITE RED GRAY YELLOW WHITE GREEN GRAY RED NOTES 1 The blower motor speed tap connection may not be as shown See the Insta...

Page 25: ...2 3 4 5 6 9 PIN HOUSING 9 PIN PLUG 6 PIN PLUG HARNESS BLACK WHITE GRAY RED BLACK RED WHITE BLACK MOTOR 6 PIN PLUG HARNESS WHITE BLACK BLUE GREEN YELLOW ORANGE RED BROWN BLUE GREEN ORANGE RED BROWN YE...

Page 26: ...R BLACK WHITE 6 PIN PLUG 6 PIN PLUG BLACK WHITE BLACK WHITE GRAY RED BLACK HARNESS HARNESS GREEN BROWN RED ORANGE YELLOW GREEN BLUE BROWN RED ORANGE YELLOW GREEN BLUE RED CUT WIRES TO REMOVE PLUG HOU...

Page 27: ...delay W Y AUX HEAT On 5 KW Stage 1 Heat on instantly Cool blower on after 3 second delay 10 KW Stage 1 Heat on instantly Cool blower on after 3 second delay Stage 2 Heat on after 5 seconds delay 15 KW...

Page 28: ...ly Blower off after 15 second delay W1 W2 EHEAT On 5 KW Stage 1 Heat on instantly Heat blower on after 3 second delay 10 KW Stage 1 Heat on instantly Heat blower on after 3 second delay Stage 2 Heat o...

Page 29: ...off instantly Heat blower turns off after 40 second delay W1 W2 Y Y2 AUX HEAT On 5 KW Stage 1 Heat on instantly Cool blower on after 3 second delay 10 KW Stage 1 Heat on instantly Cool blower on afte...

Page 30: ...30...

Page 31: ...31...

Page 32: ...Replaces 7091750 ATTENTION INSTALLERS It is your responsibility to know this product better than your customer This includes being able to install the product according to strict safety guidelines and...

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