Mitsubishi Electric CMB-WM350F-AA Installation Manual page 13

■ (E)M200 to 500YNW (R32 refrigerant)
(1) Units "m" and "kg"
<Formula>
• When the piping length from the outdoor unit to the farthest HBC is 10 m (32 ft) or
shorter
Amount of High-pressure pipe
additional = ø22.2 total length
charge (kg) × 0.23 (kg/m)
Outdoor unit model
(E)M200
(E)M250
(E)M300
+
(E)M350
(E)M400
(E)M450
(E)M500
* Amount of refrigerant to be
charged for single-module units
• When the piping length from the outdoor unit to the farthest HBC is longer than
10 m (32 ft)
Amount of High-pressure pipe
additional = ø22.2 total length
charge (kg) × 0.19 (kg/m)
Outdoor unit model
(E)M200
(E)M250
(E)M300
+
(E)M350
(E)M400
(E)M450
(E)M500
* Amount of refrigerant to be
charged for single-module units
<Example>
Outdoor unit model: PURY-EM300YNW-A1
Main-HBC model: CMB-WM350F-AA
Sub-HBC model: CMB-WM108V-BB x 3
* Refer to the pipe connection examples in [Fig. 2.4.1] (P.2).
A: ø15.88; 18 m
The total length of the high-pressure piping and liquid piping in each case is as fol-
lows:
ø15.88 total length: 18 (A)
Therefore, when the piping length from the outdoor unit to the farthest HBC is
longer than 10 m (32 ft),
Amount of additional charge = (18 × 0.09) + 5.6
= 7.3 kg (Fractions are rounded up.)
High-pressure pipe High-pressure pipe
+ ø19.05 total length + ø15.88 total length
× 0.16 (kg/m) × 0.11 (kg/m)
Amount (kg) HBC model Amount (kg)
1.0 + 350F 5.6
1.0 500F 5.6
0
0
0
0
0
High-pressure pipe High-pressure pipe
+ ø19.05 total length + ø15.88 total length
× 0.13 (kg/m) × 0.09 (kg/m)
Amount (kg) HBC model Amount (kg)
1.0 + 350F
1.0 500F
0
0
0
0
0
(2) Units "ft" and "oz"
<Formula>
• When the piping length from the outdoor unit to the farthest HBC is 10 m (32 ft) or
shorter
Amount of High-pressure pipe
additional ø7/8 total length
=
charge (oz) × 2.48 (oz/ft)
Outdoor unit
(E)M200
(E)M250
(E)M300
+
(E)M350
(E)M400
(E)M450
(E)M500
* Amount of refrigerant to be
charged for single-module units
• When the piping length from the outdoor unit to the farthest HBC is longer than
10 m (32 ft)
Amount of High-pressure pipe
additional ø7/8 total length
=
charge (oz) × 2.05 (oz/ft)
Outdoor unit model
(E)M200
5.6
(E)M250
5.6
(E)M300
+
(E)M350
(E)M400
(E)M450
(E)M500
* Amount of refrigerant to be
charged for single-module units
<Example>
Outdoor unit model: PURY-EM300YNW-A1
Main-HBC model: CMB-WM350F-AA
Sub-HBC model: CMB-WM108V-BB x 3
* Refer to the pipe connection examples in [Fig. 2.4.1] (P.2).
A: ø5/8; 59 ft
The total length of the high-pressure piping and liquid piping in each case is as fol-
lows:
ø5/8 total length: 59 (A)
Therefore, when the piping length from the outdoor unit to the farthest HBC is
longer than 10 m (32 ft),
Amount of additional charge = (59 × 0.97) + 198
High-pressure pipe
ø3/4 total length
+
× 1.73 (oz/ft)
Amount (oz) HBC model
model
+
36 350F
36 500F
0
0
0
0
0
High-pressure pipe
ø3/4 total length
+
× 1.36 (oz/ft)
Amount (oz) HBC model
+
36 350F
36 500F
0
0
0
0
0
= 255.3 oz (Fractions are rounded up.)
High-pressure pipe
ø5/8 total length
+
× 1.19 (oz/ft)
Amount (oz)
198
198
High-pressure pipe
ø5/8 total length
+
× 0.97 (oz/ft)
Amount (oz)
198
198
13