Nortek B6BV Series, Installation Instructions Manual

4

√

  Check the electrical supply and verify the power supply 

is adequate for unit operation. The system must be wired 

and provided with circuit protection in accordance with 

local building codes. If there is any question concerning 

the power supply, contact the local power company.

√

  Verify the duct system is appropriate for the air handler 

being installed. Please note that when replacing an 

existing system with lower air-flow, the duct system 

may require modification.

Locating the Air Handler

•  Survey the job site to determine the best location for 

mounting the unit. Consideration should be given to 

availability of electric power, service access, and noise.

•  The dimensions of the room or alcove must be able 

to accommodate the overall size of the unit and the 
installation clearances listed in 

Figure 1

. Physical 

dimensions for this air handler are also shown in 

Figure 

8 (page 13)

.

•  This  unit  should  be  located  with  consideration  of 

minimizing the length of the supply and return ducts. 
Refer to the rating plate or 

Table 5 (page 14)

 or 

Table 

6 (page 14) 

for proper circulating airflow data.

minimum clearances

•  This  appliance  must  be  installed  in  accordance  with 

clearances listed in 

Figure 1

. The air handler must be 

installed with ample clearance for easy access to the 

air filter, blower assembly, heater assembly, controls, 

and vent connections.

•  Static pressure drop through louvered openings and 

through return air plenums should be considered in 

the overall duct design in the determination of the total 

external static pressure.

•  All electric heater kits less than 20 kw  are approved 

for use in air handler installations with zero-clearance 

to combustibles at any blower speed. For upflow 

configuration, B6 air handlers are equipped with 20 

kw electric heater kits are approved for installation with 

zero clearance to combustibles at any blower speed.

plenums & Air Ducts

 WARNING:

All return ducts must be secured to the air 

handler using appropriate methods. All return 

ducts must be adequately sealed. When return 

air is provided through 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 

such as a fireplace insert, stove, etc. this may 

result in fire, explosion, carbon monoxide 

poisoning, personal injury, or property damage.

•  Plenums  and  air  ducts  should  be  installed  in 

accordance with the standards of the National Fire 

Protection Association Standard for Installation of 

Air Conditioning Systems (NFPA 90A), Standard for 

Installation of Residence Type Warm Air Heating 

and Air Conditioning Systems (NFPA 90B), and all 

applicable local codes. NFPA publications are available 

by writing to: National Fire Protection Association, 

Batterymarch Park, Quincy, ME 02269 or visit  

www.NFPA.org online.

•  Design the duct work according to methods described 

by the Air Conditioning Contractors of America (ACCA). 

Air ducts must be aluminum, tin plate, galvanized sheet 

steel, or other approved materials for outlet or return 

air ducts. Snap-Lock or Pittsburgh-Lock seams are 

preferred. All other types of seams must be made tight 

to prevent leakage.

•  GAS PIPInG muST noT run In or ThrouGh Any 

OF THE AIR DUCT SYSTEM.

•  This  unit  is  designed  only  for  use  with  a  return  and 

supply duct. The ducts should be appropriately sized 

to the capacity of the air handler to ensure its proper 
airflow rating. Refer to the rating plate or 

Table 5 (page 

14)

 or 

Table 6 (page 14)

 for proper circulating 

airflow data.

•  use  transition  fittings  if  the  supply  and/or  return  air 

openings of the unit do not match the duct openings. 

These transitions should be dimensioned in accordance 

with standard practice as specified in the ASHRAE 

recommendations for duct transitions.

•  Flexible connectors may be used between the unit and 

the ductwork to prevent transmission of vibration from 

the unit to the structure. Heat resistant material must 

be used for the flexible connector at the supply air end 

of the unit.

•  It  is  good  practice  to  seal  all  connections  and  joints 

with industrial grade sealing tape or liquid sealant. 

INStALLAtIoN cLEARANcES

Left Side ................. 0 Inches

Right Side ............... 0 Inches

Front ........................

†

4 Inches

Back ........................ 0 Inches

†

NotES:

cLoSEt oR ALcoVE INStALLAtIoNS:

•  Allow 24 in. minimum clearance from front of unit to nearest wall or 

partition for servicing. Recommended clearance is 36 in.

•  A return air grill should be installed in the door or a partially louvered 

door across the opening for proper air circulation. Provide at least 

235 in

2

 free opening for return air for B-cabinet models and 300 

in

2

 for C-cabinet models. A fully louvered closet door is strongly 

recommended for both installation types.

Figure 1. minimum Unit clearances

REAR

RIGHT

SIDE

LEFT
SIDE

FRONT