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Refrigerant charging
• Keeping valve of the outdoor unit closed, be sure to charge liquid refrigerant from service port at liquid side.
• If the specified amount of refrigerant cannot be charged, open fully valves of outdoor unit at liquid, gas, and
balance sides, perform cooling operation under condition that valve at gas side returns to close side a little
(MAP0801∗, MAP1001∗, MAP1201∗ only), and then charge refrigerant into service port at gas side. In this
time, choke the refrigerant slightly by operating valve of the bomb to charge refrigerant. The liquid refrigerant
may be charged suddenly, therefore be sure to charge refrigerant gradually.
• When refrigerant leaks and shortage of refrigerant generates, recover refrigerant in the system and recharge
new refrigerant up to the correct level.
<Example of calculation>
Liquid pipe :
Ø6.4 = 5 + 5 = 10m
Ø9.5 = 10 + 10 + 10 + 10 + 4 = 44m
Ø12.7 = 30 + 10 = 40m
R = (10m x 0.025kg/m) + (44m x 0.055kg/m) + (40m x 0.105kg/m) + 2.5 = 9.37kg
REQUIREMENT
<Entry of refrigerant charge amount>
• Fill the additional refrigerant record column of the wiring diagram indication plate with the additional
refrigerant amount at installation work, total refrigerant amount and the name of the service man who
charged refrigerant at installation time.
• The total refrigerant amount means the total value of the refrigerant amount at shipment and the additional
refrigerant amount at installation time. The refrigerant amount at the shipment is one described on the “Unit
nameplate”.
024 024 009 024 009
Ø12.7 (10m)
MMY-MAP1001HT
Ø9.5 (10m) Ø9.5 (10m) Ø6.4 (5m) Ø9.5 (10m) Ø6.4 (5m)
Ø9.5 (10m)
Ø9.5 (4m)
Liquid pipe
Ø12.7 (30m)
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