12
Installation instruction
Charge the additional refrigerant as liquid state with the gauge.
If the additional refrigerant can not be charged totally when the outdoor stops, charge it at the trial mode.
If the unit runs for a long period in the state of lack of refrigerant, compressor will occur failure.
(the charging must be nished within 30 minutes especially when the unit is running, menawhile charging the refrigerant).
A. Charging amount when out of factory excludes the refrigerant in the pipe.
B. The unit only is charged the standard volume of refrigerant (distributing pipe length is 0m). Additional charging
amount=actual length of liquid pipe x additional amount per meter liquid pipe
Additional charging amount=L1×0.35+L2×0.25+L3×0.17+L4×0.11+L5×0.054+L6×0.022
L1: total length of 22.22 liquid pipe; L2: total length of 19.05 liquid pipe; L3: total length of 15.88 liquid pipe;
L4: total length of 12.7 liquid pipe; L5: total length of 9.52 liquid pipe; L6:total length of 6.35 liquid pipe;
C. Refrigerant charging and additional charging
Note:
• To prevent the different oil into the pipe, please use the special tool for R410A, especially for gauge manifold and
charging hose.
• Mark the refrigerant type in different colour on the tank. R410A is pink.
• Must not use the charging cylinder, because the R410A will change when transferring to the cylinder.
• When charging refrigerant, the refrigerant should be taken out from the tank as liquid state.
• Mark the counted refrigerant volume due to the distributing pipe length on the label.
Tighten torque as the table below:
Tighten torque N.m
Shaft (valve body) Cap (cover) T-shape nut (check joint)
For gas pipe Less than 7 Less than 30 13
For liquid pipe 7.85 (MAX15.7) 29.4 (MAX39.2) 8.8 (MAX14.7)
Additonal refrigerant charging per meter(kg/m)
Charge when out of factory
Ø22.22 Ø19.05 Ø15.88 Ø12.7 Ø9.52 Ø6.35
0.35 0.25 0.17 0.11 0.054 0.022 Refer to label
GWP: 2088
The product contains uorinated greenhouse gases and its functioning relies upon such gases.
(9) Additional refrigerant charging
• Start: press the main control board of the Start and Stop keys at the same time for 5 seconds, the machine enters
the refrigerant automatic recovery control: the compressor starts, the right side of the machine C0 and Ps digital tube
ashing, lasted for about 3 minutes.
• Operation: when the digital tube C1 and Ps alternately ashing, manually shut off the liquid pipe valve, the refrigerant
recovery.
• Off valve: when Ps < 1kg, digital tube display C2, fast manual shut-off valve, 5S after the system shut down.
• End: manual power down for program reset.
(10) Refrigerant recovery
Note: heating, standby or shutdown: outdoor machine forced to refrigeration operation.
Open/close method:
• Take down the valve cap.
• Turn the liquid stop valve and the gas stop valve with hexangular spanner until it stops. If opening the valve strongly,
the valve will be damaged.
• Tighten the valve cap.
(8) Check vale operation
Because the unit is with refrigerant R410A, the below issues should be paid attention:
• To prevent the different oil into the pipe, please use the special tool for R410A, especially for gauge manifold and
charging hose.
• To prevent the compressor oil into the refrigerant cycle, please use the anti-counter-ow adapter.
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