Mitsubishi Electric CITY MULTI PQHY-P YLM-A Series Installation Manual page 27

For PQHY-P·Y(S)LM-A
<Additional Charge>
• Piping length from outdoor unit to the farthest indoor unit ≤ 30.5 m [100 ft]:
Use table [A].
• Piping length from outdoor unit to the farthest indoor unit > 30.5 m [100 ft]:
Use table [B].
Additional Liquid pipe size
refrigerant Total length of
charge ø19.05 mm [3/4 in]
=
(m) × 0.29 (kg/m)
[A] (kg)[oz] [A]
(ft) × 3.12 (oz/ft)
(m) × 0.26 (kg/m)
[B] (kg)[oz] [B]
(ft) × 2.80 (oz/ft)
Liquid pipe size
Total length of
ø9.52 mm [3/8 in]
+
(m) × 0.06 (kg/m)
[A]
(ft) × 0.65 (oz/ft)
(m) × 0.054 (kg/m)
[B]
(ft) × 0.59 (oz/ft)
Additional charge
Heat source unit model
+
P550
Single
P600
<Example>
Indoor 1: 36 A: ø12.7 [1/2 in] 40 m [131 ft] a: ø9.52 [3/8 in]
2: 30 B: ø9.52 [3/8 in] 10 m [32 ft] b: ø9.52 [3/8 in]
3: 15 C: ø9.52 [3/8 in] 15 m [49 ft] c: ø6.35 [1/4 in]
4: 12 D: ø9.52 [3/8 in] 10 m [32 ft] d: ø6.35 [1/4 in]
5: 24
The total length of each liquid line is as follows:
ø12.7 [1/2 in]: A = 40 m [131 ft]
ø9.52 [3/8 in]: B + C + D + a + b + e = 10 [32] + 15 [49] + 10 [32] + 10 [32] + 5 [16]
ø6.35 [1/4 in]: c + d = 10 [32] + 10 [32] = 20 m [64 ft]
Therefore, additional refrigerant charge
= 40 m [131 ft] × 0.11 kg/m [1.19 oz/ft] + 60 [193 ft] × 0.054 kg/m [0.59 oz/ft]
+ 20 [64 ft] × 0.021 kg/m [0.23 oz/ft] + 3.0 kg [106 oz] = 11.1 kg [392 oz]
Value of α
Total capacity of connected indoor units
80 or below
81 to 160
161 to 330
331 to 390
391 to 480
481 to 630
631 to 710
711 to 800
801 to 890
891 to 1070
1071 to 1250
1251 or above
Note:
For PQHY/PQRY-P·Y(S)LM-A
* When connecting PEFY-P20VMA3-E units, add 0.54 kg of refrigerant for
each of these units.
* When connecting PEFY-P25/32/40VMA3-E units, add 0.74 kg of refrigerant
for each of these units.
* When connecting PEFY-P50/63/71/80/100/125VMA3-E units, add 1.16 kg
of refrigerant for each of these units.
Liquid pipe size Liquid pipe size
Total length of Total length of
ø15.88 mm [5/8 in] ø12.7 mm [1/2 in]
+ +
(m) × 0.2 (kg/m) (m) × 0.12 (kg/m)
[A] [A]
(ft) × 2.16 (oz/ft) (ft) × 1.30 (oz/ft)
(m) × 0.18 (kg/m) (m) × 0.11 (kg/m)
[B] [B]
(ft) × 1.94 (oz/ft) (ft) × 1.19 (oz/ft)
Liquid pipe size
Total length of
ø6.35 mm [1/4 in]
+
(m) × 0.024 (kg/m)
[A]
(ft) × 0.26 (oz/ft)
(m) × 0.021 (kg/m)
[B]
(ft) × 0.23 (oz/ft)
Charged amount
+ α
1.0 kg
1.0 kg
10 m [32 ft]
At the
5 m [16 ft]
10 m [32 ft]
conditions
10 m [32 ft]
below:
e: ø9.52 [3/8 in] 10 m [32 ft]
+ 10 [32] = 60 m [193 ft]
α
2.0 kg [71 oz]
2.5 kg [89 oz]
3.0 kg [106 oz]
3.5 kg [124 oz]
4.5 kg [159 oz]
5.0 kg [177 oz]
6.0 kg [212 oz]
8.0 kg [283 oz]
9.0 kg [318 oz]
10.0 kg [353 oz]
12.0 kg [424 oz]
14.0 kg [494 oz]
For PQRY-P·Y(S)LM-A
<Additional charge>
• Piping length from outdoor unit to the farthest indoor unit ≤ 30.5 m [100 ft]:
Use table [A].
• Piping length from outdoor unit to the farthest indoor unit > 30.5 m [100 ft]:
Use table [B].
High-pressure
Additional
pipe size
refrigerant
Total length of
charge
ø28.58 mm [1-1/8 in]
=
(m) × 0.36 (kg/m)
[A] (kg)[oz] [A]
(ft) × 3.88 (oz/ft)
(m) × 0.33 (kg/m)
[B] (kg)[oz] [B]
(ft) × 3.55 (oz/ft)
High-pressure
pipe size
Total length of
ø15.88 mm [5/8 in]
+
(m) × 0.11 (kg/m)
[A]
(ft) × 1.19 (oz/ft)
(m) × 0.1 (kg/m)
[B]
(ft) × 1.08 (oz/ft)
Liquid Piping Size
Total length of
ø9.52 mm [3/8 in]
+
(m) × 0.06 (kg/m)
[A]
(ft) × 0.65 (oz/ft)
(m) × 0.054 (kg/m)
[B]
(ft) × 0.59 (oz/ft)
Additional charge
Heat source unit model
+
P550
Single
P600
BC controller
(Standard/Main)
+
3.0 kg [106 oz]
Total capacity of
connected indoor units
80 or below
81 to 160
161 to 330
331 to 390
+
391 to 480
481 to 630
631 to 710
711 to 800
801 to 890
891 to 1070
1071 to 1250
1251 or above
<Example>
Indoor 1: 30 A: ø28.58 [1-1/8 in] 40 m [131 ft] a: ø9.52 [3/8 in]
2: 96 B: ø9.52 [3/8 in] 10 m [32 ft]
3: 12 C: ø9.52 [3/8 in] 20 m [64 ft]
4: 15 D: ø9.52 [3/8 in] 5 m [16 ft]
5: 12 E: ø9.52 [3/8 in] 5 m [16 ft]
6: 24 F: ø22.2 [7/8 in] 3 m [9 ft]
G: ø19.05 [3/4 in] 1 m [3 ft]
The total length of each liquid line is as follows:
ø28.58 [1-1/8 in]: A = 40 m [131 ft]
ø22.2 [7/8 in]: F = 3 m [9 ft]
ø19.05 [3/4 in]: G = 1 m [3 ft]
ø9.52 [3/8 in]: C + D + E + a + b + f = 50 m [164 ft]
ø6.35 [1/4 in]: c + d + e = 20 m [64 ft]
Therefore, additional refrigerant charge
= 40 m [131 ft] × 0.33 kg/m [3.55 oz/ft] + 3 m [9 ft] × 0.21 kg/m [2.26 oz/ft]
+ 1 [3 ft] × 0.14 kg/m [1.51 oz/ft] + 50 m [164 ft] × 0.054 kg/m [0.59 oz/ft]
+ 20 m [64 ft] × 0.021 kg/m [0.23 oz/ft] + 3.0 kg [106 oz] + 2.0 kg [71 oz]
+ 5.0 kg [177 oz]
= 27.1 kg [956 oz]
High-pressure High-pressure
pipe size pipe size
Total length of Total length of
ø22.2 mm [7/8 in] ø19.05 mm [3/4 in]
+
+
(m) × 0.23 (kg/m) (m) × 0.16 (kg/m)
[A] [A]
(ft) × 2.48 (oz/ft) (ft) × 1.73 (oz/ft)
(m) × 0.21 (kg/m)
(m) × 0.14 (kg/m)
[B] [B]
(ft) × 2.26 (oz/ft)
(ft) × 1.51 (oz/ft)
Liquid Piping Size Liquid Piping Size
Total length of Total length of
ø15.88 mm [5/8 in] ø12.7 mm [1/2 in]
+
+
(m) × 0.2 (kg/m) (m) × 0.12 (kg/m)
[A] [A]
(ft) × 2.16 (oz/ft) (ft) × 1.30 (oz/ft)
(m) × 0.18 (kg/m)
(m) × 0.11 (kg/m)
[B] [B]
(ft) × 1.94 (oz/ft)
(ft) × 1.19 (oz/ft)
Liquid Piping Size
Total length of
ø6.35 mm [1/4 in]
+
(m) × 0.024 (kg/m)
[A]
(ft) × 0.26 (oz/ft)
(m) × 0.021 (kg/m)
[B]
(ft) × 0.23 (oz/ft)
Charged amount
1.0 kg
1.0 kg
BC controller
BC controller
(Sub) Total Units
(Sub) Per Unit
+
1
1.0 kg [36 oz]
2
2.0 kg [71 oz]
Per Indoor Unit
2.0 kg [71 oz]
2.5 kg [89 oz]
3.0 kg [106 oz]
3.5 kg [124 oz]
4.5 kg [159 oz]
5.0 kg [177 oz]
6.0 kg [212 oz]
8.0 kg [283 oz]
9.0 kg [318 oz]
10.0 kg [353 oz]
12.0 kg [424 oz]
14.0 kg [494 oz]
10 m [32 ft]
b: ø9.52 [3/8 in] 5 m [16 ft]
At the
c: ø6.35 [1/4 in] 5 m [16 ft]
d: ø6.35 [1/4 in] 10 m [32 ft]
conditions
e: ø6.35 [1/4 in] 5 m [16 ft]
below:
f: ø9.52 [3/8 in] 5 m [16 ft]
27