Panasonic PAW-160MAH2, Руководство по установке

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Product description
Calculation example for total additional refrigerant charge ( R32 )
Unit: U-60PZ2E5
Pipe length: 40 meter
AHU DX coil (supplied by AHU manufacturer): 1,7 dm
3
Refrigerant charge at shipment fi tted for pipe length within 30 m
Pipes additional refrigerant charge: 0.035 kg/m
AHU DX coil additional refrigerant charge: 0.83 kg/dm
3
Refrigerant charge at shipment is suffi cient for AHU DX coil volume up to 1,4 dm
3
Total additional refrigerant charge calculation
((1.7 dm
3
– 1.4 dm
3
) x 0.83 kg/dm
3
) + (10 m x 0.035 kg/m) = 0.249 kg + 0.35 kg = 0.599 kg
Calculation example for number of passes in the heat exchanger
The minimum number of passes in the AHU heat exchanger is restricted. The limit is calculated
by the formula:
Minimum number of passes
= Number of steps × Distance between tube sheets × Number of rows × 1.5 × 10
–4
The calculated value must then be rounded up to the next integer number.
Example
Number of steps: 12
Distance between tube sheets: 1,000 mm
Number of row: 3
Minimum number of passes = 12 × 1,000 x 3 × 1.5 × 10
–4
= 5.4
This value must be rounded up to 6.
This means that the minimum number of passes is 6 passes.
NOTICE
Nuisance tripping of high-pressure switch
The outdoor unit is equipped with a high-pressure switch, which stops the operation of the air-
conditioning unit for protection when the set high-pressure limit is exceeded. Nuisance tripping
of the high-pressure switch may occur in heating mode if the heat exchanger pipe thermistor
(E2) is not properly positioned or if the limit is not properly set.
► Position the heat exchanger pipe thermistor (E2) correctly and set the limit properly in
accordance with the instructions given in this document.
!