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Charging additional refrigerant
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R-410A refrigerant is blended refrigerant. Add refrigerant in liquid form only. (Make sure to use the refrigerant bomb in
upright position)
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Measure the quantity of the refrigerant according to the length of the liquid side pipe. Add fixed quantity of the
refrigerant using a scale.
Single installation
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Open the manifold gauge valve connected to the liquid side service valve and add the liquid refrigerant.
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If you cannot add the whole quantity of the refrigerant while the outdoor unit is stopped, open the gas side and liquid
side service valve. Then, add remaining refrigerant by pressing the refrigerant adding button of the outdoor PCB.
Gas side
Scale
R-410A (Inject
liquid refrigerant)
Liquid side
Vacuum port
Manifold gage
Service valve
Outdoor unit
Module installation
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Open the manifold gauge valve connected to the liquid side service valve and add the liquid refrigerant.
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If you cannot add the whole quantity of the refrigerant while the outdoor unit is stopped, open the gas side and liquid
side service valve. Then, add remaining refrigerant by pressing the refrigerant adding button of the outdoor PCB.
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If you use the refrigerant charging function from the PCB, outdoor unit will operate and charge the refrigerant. At this
time, you must use gas side manifold gauge for cooling operation and use charging port for heating at the manifold
gauge for heating operation.
Gas
side
Scale
R-410A (Inject
liquid refrigerant)
Liquid side
Vacuum port
Liquid side pipe
Service valve
Outdoor unit
Outdoor unit
Manifold gage