Nortek MB7EM 3-PHASE Series, Installation Instructions Manual

Page 1: ...ll 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 serious injury d...

Page 2: ...ion Check 10 Running the Blower Continuously 10 System Cooling 10 System Heating 10 Turning the Blower Off 10 Blower Configurations 10 Selecting Minimum Electric Heat Airflow 10 Determining Nominal Sy...

Page 3: ...s otherwise noted in these instructions only factory authorized kits or accessories may be used with this product The installer should become familiar with the units wiring diagram before making any e...

Page 4: ...gh the bottom of the unit the joint between the air handler and the return air plenum must be air tight Return air and circulating air ducts must not be connected to any other heat producing device su...

Page 5: ...nwithanoutervaporbarrier Consult your Distributor for the recommended type and thickness of insulation for your area as required by local codes Condensate Drainage CAUTION The air handler must be leve...

Page 6: ...ill connect with the supply air duct 4 Carefullyplacethecasedcoilontopofthemodularairhandler NOTE Make sure the units are flush in the front and on the sides with a step fit in the back and that there...

Page 7: ...lowerassembly The blower assembly is secured with two screws on either side near the front With these removed the blower assembly can slide out of the front of the unit Install the coil and drain pan...

Page 8: ...on delay a 15 second blower off delay in electric heat mode and a 40 second ELECTRICAL CONNECTIONS WARNING ELECTRICAL SHOCK FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could res...

Page 9: ...lug of the heater kit 2 Connectthelinevoltageleadstothecircuitbreakerorterminal block provided 3 Connect the heater kit plug with the mating receptacle on the air handler control board If a heater kit...

Page 10: ...se there are so many different ways to set up the air handler it is important to read and follow these directions carefully MB7EM MB7VM air handlers use high efficiency circulating air motors that com...

Page 11: ...NG ELECTRICAL SHOCK FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in serious injury or property damage Improper servicing could result in dangerous operation serious...

Page 12: ...DIMENSION E A 12 3 4 24 3 4 14 1 4 12 3 4 3 4 B 12 3 4 24 3 4 17 1 2 16 2 3 8 C 18 1 4 27 1 2 21 19 1 2 1 3 8 B A 12 7 8 E 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...

Page 13: ...or Mount Kit Blower Motor Blower Wheel Blower Housing Transformer Coil Assembly Outlet Heater Box Lower Front Bracket Blower Door Rear Bracket Front Joining Bracket Motor Control Board Control Board F...

Page 14: ...1778 1727 1684 1613 1542 1 1 0 1 1935 1932 1884 1840 1795 1727 1659 1614 0 0 1 1 2070 2023 2009 1953 1906 1851 1800 1724 1 0 1 1 2138 2079 2063 2003 1951 1889 1830 1765 0 1 1 1 2161 2111 2091 2058 201...

Page 15: ...100 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...

Page 16: ...UIT CIRCUIT A CIRCUIT B CIRCUIT C SINGLE CIRCUIT MB7VM 240 VAC 50 60 Hz Single Phase A 1 200 CFM 4 5 4 5 15 15 B 1 600 CFM 4 5 4 5 15 15 C 2 000 CFM 6 3 6 3 15 15 208 VAC 50 60 Hz Single Phase A 1 200...

Page 17: ...on after 15 seconds delay OFF Heat stages off instantly Blower off after 15 second delay W1 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 i...

Page 18: ...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 19: ...HEATER P1 L 2 HUM EAC P2 3A Fuse P3 EXPANSION PORT Figure 11 Two Stage Control Board All Models Figure 10 Low Voltage Wiring For Twinning Y R C Outdoor Unit A H 1 C R Y G W W G Y R Thermostat 1 A H 2...

Page 20: ...DHUM W1 THERMOSTAT EXPANSION PORT COOL HEAT FAN SPEED 1 2 3 4 5 6 7 8 OFF ON CONNECTION TERMINAL TO TWIN FURNACES GND SENSOR DEHUM Y1 H L2 OUT L2 IN L1 IN L1 OUT Y1 Y Y2 W C EXPANSION PORT R RED GREEN...

Page 21: ...RAM 3 Transformer may have a dual voltage primary tap Match the tap position with the supply voltage used 4 If the internal wiring is replaced use only 105 C copper wire of the same gauge 3 Le transfo...

Page 22: ...ns d installation 2 D branchez toutes les sources d alimentation avant l entretien 3 Le transformateur peut avoir un robinet principal double tension Agencez la position du robinet au type de tension...

Page 23: ...23...

Page 24: ...duct according to strict safety guidelines and instructing the customer on how to operate and maintain the equipment for the life of the product Safety should always be the deciding factor when instal...