Install Instructions

Installation Manual - A-VMH18DU,28TU,36QU-1

Note On Adding Refrigerant

CAUTION

• Refrigerant charging must be performed after wiring, vacuuming, and the leak testing.

• DO NOT exceed the maximum allowable quantity of refrigerant or overcharge the system. Doing

so can damage the unit or impact it’s functioning.

• Charging with unsuitable substances may cause explosions or accidents. Ensure that the

appropriate refrigerant is used.

•

Refrigerant

containers must be opened slowly. Always use protective gear when charging the

system.

• DO NOT mix refrigerants types.

N=2(two zone models), N=3(three zone

models), N=4(four zone models). Depending on

the length of connective piping or the pressure of the evacuated system, you made need to

add refrigerant. Refer to table below for refrigerant amounts to be added:

Note: The standard pipe length is 7.5m (24.6’).

ADDITIONAL REFRIGERANT PER PIPE LENGTH

Connective Pipe

Length(m)

Air Purging

Method

Additional Refrigerant

Pre-charge pipe length (ft/m)

(Standard pipe length xN )

Vacuum Pump

N/A

More than (Standard

pipe lengthxN) ft/m

Vacuum Pump

R410A

Liquid Side: Ø 6.35 (Ø 1/4”)

(Total pipe length - standard pipe lengthxN) x15g/m

(Total pipe length - standard pipe lengthxN) x0.16oZ/ft

Liquid Side: Ø 9.52 (Ø 3/8”)

(Total pipe length - standard pipe lengthxN) x30g/m

(Total pipe length - standard pipe lengthxN) x0.32oZ/ft