BMKH24M-NDG3 Owners & Installation Manual

Blueridge Owners Manual

Document Version: 11/2016

Connecting the Piping

• Use caution when prepping the air handler to connect the copper line

set. The air handler will be be pressurized with dry nitrogen, which keeps

the unit free of moisture and indicates that the air handler doesn’t have

refrigerant leaks. When removing the plugs, the nitrogen will release. If

the nitrogen is not present in the air handler at time of installation, stop

installation and call Alpine’s technical support.

• Pair the pipe joint of the air handler with the flared end of the copper line

set. If the copper pipes aren’t already flared, please reference the Copper

Line Flaring section of this document (page 54).

• Tighten the union nut (compression fitting) by hand.

• Place the open-ended wrench on the pipe joint and place the torque

wrench on the union nut (compression fitting). Tighten the union nut

according to the chart below:

Hex Nut Diameter (in) Tightening Torque (ft-lbs)

1/4 10-13

3/8 25-30

1/2 36-45

5/8 50-60

• If the lines are not already insulated, wrap them with insulation and tape

the insulation in place.

Installation of the Indoor Air Handler