Panasonic S-200PE2E5 Technical Data & Service Manual page 42

1
Table 1-3 Connection Tube Sizes (Twin, Triple, Double-Twin)
Type capacity of indoor unit
Gas tube
Liquid tube
Amount of additional change per 1 m
Change with the amount of additional refrigerant calculated using the formula below, based on the values in Table 1-3 and the
size and length of the liquid tubing
Amount of additional refrigerant charge (g)
Do not remove refrigerant from the system, even if the result of the calculation is negative.
Additional refrigerant amount (g) = Additional refrigerant for main tubing (g) + Additional refrigerant for distribution tubing (g)
Additional refrigerant amount (g) = Additional refrigerant for main tubing (g) + Additional refrigerant for distribution tubing (g)
(Use with the current refrigerant charge.)
(a) Actual length (m) of main tubing (ø9.52)
Actual length (m) of main tubing (ø12.7)
(b) Total length of distribution tubing (ø9.52)
(c) Total length of distribution tubing (ø6.35)
Example : Type 200
Sample tubing lengths
L = 35 m 1 = 5 m
L1 = 10 m 2 = 5 m
L2 = 5 m 3 = 5 m
4 = 10 m
Find the liquid tube size from Table 1-3.
L : ø9.52
(Type 200)
L1 : ø9.52 (Total type capacity of indoor unit 100)
(Total type capacity of indoor unit 100)
L2 : ø9.52
1 - 4 : ø6.35
The amount of additional on-site refrigerant charge is
found by subtracting the outdoor unit charge-less
refrigerant amount from the total charge amount
for all tube sizes.
ø9.52 L
ø9.52 L1 + L2
ø6.35 1 - 4
Outdoor unit charge-less refrigerant amount
The amount of additional on-site refrigerant charge is 1300 g.
Table 1-4
Outdoor Unit Type
Outdoor Unit Amount of
Chargeless Refrigerant
Main tubing (L)
200 250
ø 25.4
ø 9.52 ø 12.7
40 g 80 g
- Outdoor unit charge-less refrigerant amount (g)
= 40× (a) + 40× (b) + 20× (c) - 1200 (Type 200)
- Outdoor unit charge-less refrigerant amount (g)
= 80× (a) + 40× (b) + 20× (c) - 2400 (Type 250)
× 40 g / m = 1400
: 35 m
× 40 g / m =
: (10 + 5) m
: (5 + 5 + 5 + 10) m × 20 g / m =
Total
Type 200 Type 250
g
1200
Double-Twin distribution tube (L1, L2)
Total type capacity of indoor unit connected after
the branch
100 - 125
ø 15.88
ø 9.52
40 g
Refrigerant charge per 1 m of actual length = 40 g/m
Refrigerant charge per 1 m of actual length = 80 g/m
Refrigerant charge per 1 m of actual length = 40 g/m
Refrigerant charge per 1 m of actual length = 20 g/m
Outdoor unit (Type 200)
L
1
600
500
-1200
+1300
g
2400
1-36
Indoor unit connection tube
( 1, 2, 3, 4)
60 - 125
ø 15.88
ø 9.52
40 g
L2
L1
2
3
Indoor unit (Type 50 × 4)
50
ø 12.7
ø 6.35
20 g
4