7
DATA
3
1.5m
1m
MICROPHONE
UNIT
GROUND
90
80
70
60
50
40
30
20
10
63
125
250
500
1000
2000
4000
8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
OCT
A
VE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002
μ
bar)
BAND CENTER FREQUENCIES, Hz
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
PUHZ-SHW230YKA
COOLING
MODE
HEATING
58
SPL(dB)
59
LINE
3-2. NOISE CRITERION CURVES
Total piping length (one way)
Amount of additional refrigerant charge (kg)
30 m and less
31-40 m
41-50 m
51-60 m
61-70 m
71-80 m
No additional
charge necessary
Calculate the amount of additional refrigerant
charge using formula provided below.
For single combination
(1 indoor unit)
For twin / triple /
quadruple combination
(2-4 indoor units)
1.4 kg
2.8 kg
0.9 kg
1.8 kg
4.2 kg
5.6 kg
7.0 kg
At time
of
shipping
7.1 kg
3-1. Addition of refrigerant
When length exceeds 50 m for twin / triple / quadruple combination
When the total length of the piping exceeds 50 m, calculate the amount of additional charge based on the following requirements.
Note: If the calculation produces a negative number (i.e. a “minus” charge), of if calculation results in an amount that is less than the “Additional charage amount for 50 m”,
perform the additional charge using the amount shown in “Additional charge amount for 50 m”.
Amount of additional
charge
=
Main piping:
Liquid line size
ø12.7 overall length ×
0.17
+
+
+
–
4.3 (kg)
(kg)
(m) × 0.17 (kg/m)
Additional charge amount
for 50 meters
1.8 kg
Main piping:
Liquid line size
ø9.52 overall length ×
0.14 (Gas line: ø25.4)
(m) × 0.14 (kg/m)
Branch piping:
Liquid line size
ø9.52 overall length ×
0.05 (Gas line: ø15.88)
(m) × 0.05 (kg/m)
(m) × 0.02 (kg/m)
Branch piping:
Liquid line size
ø6.35 overall length ×
0.02
<Limits of refrigerant piping installation>
Max.
1m
Indoor unit
Outdoor unit
Main piping
Branch piping
Multi distribution
pipe (option)
Outdoor unit : SHW230
A: ø9.52 ... 65 m
Water heat exchanger 1
B: ø9.52 ... 5 m
Water heat exchanger 2
C: ø9.52 ... 5 m
Water heat exchanger 3
D: ø9.52 ... 5 m
Main piping ø9.52 is A = 65 m
Branch piping ø9.52 is B + C + D = 15 m
Therefore, the amount of additional charge is:
65 × 0.14 + 15 × 0.05 - 4.3 = 5.6 (kg)
(Fractions are rounded up)
OCH534
