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Beschikbare talen
Beschikbare talen
Total Piping Length
Permissible
Farthest Piping Length (A+e)
Heat source-BC Controller Piping Length (A)
Length
Indoor-BC Controller Piping Length (e)
Indoor-
Higher Heat source High/Low Difference (H)
Permissible
Lower Heat source High/Low Difference (H')
Heat source
High/Low
High/Low Difference in Indoor/BC controller Section (h1)
Difference
High/Low Difference in Indoor/Indoor Section (h2)
Select Each Section of Refrigerant Piping
(1) Between Heat Source Unit
and BC Controller (A).
(2) Between BC Controller and
Indoor Units (a, b, c, d, e).
(3) Connection of Plural Indoor
Units With One Connection
(B)
Select the size from the table to the right.
Additional Refrigerant Charge
At the time of shipping, the heat source unit
PQRY-P200 is charged with 7.5 kilograms of re-
frigerant and the PQRY-P250 is charged with 8.5
kilograms. 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 prop-
erly 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 pro-
vided on the heat source unit.
Calculation of Additional Refrigerant
Charge
•
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 right as guide to calculat-
ing the amount of additional charging and
charge the system according.
•
If the calculation results of the calculation re-
sult in a fraction of less than 0.1 kg, round up
to the next 0.1 kg. For example, if the result of
the calculation was 10.62 kilograms, round the
result up to 10.7 kilograms.
A+B+a+b+c+d+e is 220 meters or less
A+e is 100 meters or less (90 meters or less if capacity of indoor unit exceeds 130%)
70 meters or less (60 meters or less if capacity of indoor unit exceeds 130%)
30 meters or less
50 meters or less
40 meters or less
15 meters or less
15 meters or less
(1) Diameter of refrigerant piping between
heat source unit and BC controller
Model
High press. pipe
PQRY-P200
Each
Low press. pipe
Section of
High press. pipe
PQRY-P250
Piping
Low press. pipe
Connection of
High press. pipe ø19.05 (Flare)
heat source unit/
Low press. pipe
BC controller
(3) Selection of refrigerant piping (Piping size of B section in the above figure)
Select the size according to the total capacity of indoor units to be installed downstream.
Total capacity of indoor units
Less than 80
81 to 160
Additional
refrigerant charge
(kg)
<Example>
Indoor 1 : 40
A : ø19.05 40 m
2 : 100
B : ø 9.52 10 m
3 : 40
4 : 32
5 : 63
The total length of each liquid line is as follows
ø19.05 : A = 40 m
ø9.52 : B + b + e = 10 + 5 + 10 = 25 m
ø6.35 : a + c + d = 10 + 10 + 10 = 30 m
Therefore,
<Calculation example>
Additional
refrigerant charge = 40 × 0.16 + 25 × 0.06 + 30
(2) Diameter of refrigerant piping between BC
Piping Diameter (mm)
Model number
ø19.05
20 · 25 · 32 · 40
ø25.4
ø19.05
ø28.58
ø25.4 (Flange)
ø28.58 (Flange)
Liquid line (mm)
ø9.52
ø12.7
Liquid pipe size
Liquid pipe size
Total length of
Total length of
ø19.05 × 0.16
ø9.52 × 0.06
=
+
(m) × 0.16 (kg/m)
(m) × 0.06 (kg/m)
a : ø6.35
b : ø9.52
c : ø6.35
d : ø6.35
e : ø9.52
× 0.024 + 2 = 10.7 kg
controller and indoor unit.
Piping Diameter (mm)
Liquid Line
ø6.35
Gas Line
ø12.7
Liquid Line
ø9.52
50 · 63 · 80
Gas Line
ø15.88
Liquid Line
ø9.52
100 · 125
Gas Line
ø19.05
Gas line (mm)
ø15.88
ø19.05
Liquid pipe size
Total length of
ø6.35 × 0.024
+
(m) × 0.024 (kg/m)
10 m
5 m
At the conditions
10 m
below:
10 m
10 m
Value of α
Total capacity of
connecting indoor units
to Model 80
Models 81 to 160
Models 161 to 325
+ α
α
1.0 kg
1.5 kg
2.0 kg
11
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