MEES19K187
PQH
Y
-P
-T
(S)L
MU-A1
, Y(S)L
M
U-A1
, Z(S)
LMU-
A1
335
1. Piping Design
■
PQHY-P-Z(S)LMU-A1
(1) Calculation of additional refrigerant charge
At the time of shipping, the heat source unit is charged with the refrigerant. As this charge does not include the amount needed
for extended piping, additional charging for each refrigerant line will be required on site. In order that future servicing may be
properly provided, always keep a record of the size and length of each refrigerant line and the amount of additional charge
by writing it in the space provided on the heat source unit.
<Additional Charge>
• Piping length from heat source unit to the most farthest indoor unit ≤ 30.5m[100ft] use the table [A]
• Piping length from heat source unit to the most farthest indoor unit > 30.5m[100ft] use the table [B]
+
+
+
+
+
+
(kg) [oz]
(kg) [oz]
[A]
[B]
[A]
[B]
Additional
refrigerant charge
Liquid Piping Size
Total length of
ø19.05mm [3/4in]
(m) × 0.29 (kg/m)
(ft) × 3.12 (oz/ft)
(m) × 0.26 (kg/m)
(ft) × 2.80 (oz/ft)
Table3-2-4-1. Value of
Total capacity of connecting indoor units
2.0 kg
Models ~ 27
2.5 kg
3.0 kg
3.5 kg
4.5 kg
6.0 kg
5.0 kg
[71 oz]
[89 oz]
[106 oz]
[124 oz]
[160 oz]
[212 oz]
[177 oz]
Calculate the amount of additional charge based on the length of the piping extension and the size of the refrigerant
line.
Use the table to the below as a guide to calculating the amount of additional charging and charge the system
accordingly.
* When connecting PLFY-P08NBMU-E2, add 0.3kg [11oz] of refrigerant per indoor unit.
When connecting PLFY-EP08NEMU-E, add 0.3kg [11oz] of refrigerant per indoor unit.
If the calculation results in a fraction of less than 0.1kg[1oz], round up to the next 0.1kg[1oz]. For example, if the result
of the calculation was 11.89kg[420.0oz], round the result up to 11.9kg[420oz].
Models 28 ~ 54
Models 55 ~ 126
Models 127 ~ 144
Models 145 ~ 180
Models 181 ~ 234
8.0 kg
9.0 kg
10.0 kg
14.0 kg
12.0 kg
[283 oz]
[318 oz]
[353 oz]
[494 oz]
[424 oz]
Models 235 ~ 273
Models 274 ~ 307
Models 308 ~ 342
Models 343 ~ 411
Models 412 ~ 480
Models 481 ~
[A]
[B]
Liquid Piping Size
Total length of
ø15.88mm [5/8in]
(m) × 0.2 (kg/m)
(ft) × 2.16 (oz/ft)
(m) × 0.18 (kg/m)
(ft) × 1.94 (oz/ft)
[A]
[B]
Liquid Piping Size
Total length of
ø12.7mm
[1/2in]
(m) × 0.12 (kg/m)
(ft) × 1.30 (oz/ft)
(m) × 0.11 (kg/m)
(ft) × 1.19 (oz/ft)
[A]
[B]
Liquid Piping Size
Total length of
ø9.52mm [3/8in]
(m) × 0.06 (kg/m)
(ft) × 0.65 (oz/ft)
(m) × 0.054 (kg/m)
(ft) × 0.59 (oz/ft)
[A]
[B]
Liquid Piping Size
Total length of
ø6.35mm [1/4in]
(m) × 0.024 (kg/m)
(ft) × 0.26 (oz/ft)
(m) × 0.021 (kg/m)
(ft) × 0.23 (oz/ft)
0000005756.BOOK 335 ページ ２０２０年２月２８日 金曜日 午後１時２１分
