Toshiba MCY-MUG0401HSW-E Installation Manual page 34

 Adding refrigerant
After finishing vacuuming, exchange the vacuum pump with a refrigerant canister and start additional charging of
refrigerant.
Calculation of additional refrigerant charge amount
Default refrigerant amount does not include the refrigerant for pipes at the local site.
For refrigerant to be charged in pipes at the local site, calculate the amount and charge it additionally.
NOTE
If the additional refrigerant amount calculation indicates negative, use the air conditioner without adding or reducing
refrigerant.
Outdoor unit type MUG0401
Pre-Charged amount (kg)
{
Additional refrigerant
Real length charge amount per 1 m
= ×
charge amount at local
of liquid pipe
site
Table 1
Liquid pipe dia. (mm) 6.35
Additional refrigerant amount / 1 m
0.025
liquid pipe (kg / m)
Table 2
Capacity rank 003 005 007 008 009 011
Capacity code
(Equivalent to HP) 0.3 0.6 0.8 0.9
MMU-UP****H* - - - -
4-way
MMU-UP****HP* - - - -
cassette
MMU-UP****MH* - 0.3 0.4 -
2-way
MMU-UP****WH* - - 0.4 -
cassette
MMU-UP****YH * 0.4 0.4 0.4 -
1-way
casette
Indoor
MMU-UP****SH* - - - -
unit
model
MMD-UP****BH* - 0.5 0.5 -
name
Duct MMD-UP****SPH* 0.3 0.3 0.4 0.4
MMD-UP****H* - - - -
Under-
MMC-UP****H* - - - -
ceiling
MMK-UP****H* 0.3 0.3 0.3 -
High wall
MMK-UP****DH* - 0.3 0.3 -
65-EN
MUG0501 MUG0601
2.4
Additional refrigerant Corrective amount of
Compensation by
refrigerant depending
+ + outdoor HP
liquid pipe on the indoor units
(Table 3)
(Table 1) (Table 2)
9.52
0.055
012 013 015 017 018 020 024 027 030 034 036 042 048 056
1.0 1.1 1.25 1.5 1.7 1.85 2.0 2.25 2.5 3.0 3.2
0.4 - 0.4 - 1.2 - 1.2 - 1.2 1.2 1.2
0.4 - 0.4 - 0.8 - 0.8 - 0.8 0.8 0.8
0.4 - 0.4 - 0.6 - 0.6 - - - -
0.4 - 0.4 - 0.5 - 0.7 - 0.7 0.7 0.7
0.4 - 0.4 - 0.4 - 0.4 - 0.5 0.5 -
- - - - 0.5 - 0.5 - 0.6 - -
0.5 - 0.5 - 0.5 - 0.5 - 0.7 0.7 0.7
0.4 0.4 0.4 0.4 0.5 0.5 0.5 0.7 0.7 0.7 -
- - - - - - 0.7 - 0.7 0.7 -
- - - - - - 0.6 - 0.6 0.8 0.8
0.3 - 0.3 - 0.7 - 0.7 - 0.7 0.9 0.9
0.3 - 0.3 - 0.4 - 0.4 - - - -
– 33 –
Table 3
Outdoor unit type
Compensation by outdoor HP (kg)
Example: (060 type)
L1 Ø9.52: 10 m
}
L5 Ø6.35: 3 m
×
0.9
A MMU-UP0241HP*
Additional charge amount R (kg)
= {(Lx × 0.025 kg/m) + (Ly × 0.055 kg/m) + (a + b + c + d) + (- 1.6 kg)} x 0.9
= {(12 m × 0.025 kg/m) + (28 m × 0.055 kg/m) + (0.8 kg + 0.8 kg + 0.4 kg + 0.4 kg) + (- 1.6 kg)} x 0.9
Lx: Real total length of liquid pipe diameter 6.35 mm (m)
Ly: Real total length of liquid pipe diameter 9.52 mm (m)
a: Corrective amount of refrigerant depending on the unit A (kg)
b: Corrective amount of refrigerant depending on the unit B (kg)
3.6 4.0 4.5 5.0 6.0 c: Corrective amount of refrigerant depending on the unit C (kg)
d: Corrective amount of refrigerant depending on the unit D (kg)
- 1.2 - 1.2 1.2
Charging of refrigerant
0.8 1.2 1.2 1.2 1.2
• Keeping the valve of the outdoor unit closed, be sure to charge the liquid refrigerant into the service port at the
- - - - -
liquid side.
• If the specified amount of refrigerant cannot be charged, fully open the valves of the outdoor unit at liquid and
- 1.1 - 1.1 1.1
gas sides, operate the air conditioner in COOL mode, and then charge refrigerant into service port at the gas
side. In this time, choke the refrigerant slightly by operating the valve of the canister to charge liquid refrigerant.
- - - - -
• The liquid refrigerant may be charged suddenly, therefore be sure to charge refrigerant gradually.
- - - - -
Calculation total amount of refrigerant
0.7 1.1 1.1 1.1 1.1
REQUIREMENT
- - - - -
The total amount of refrigerant in the system shall be less than or equal to the limit.
- 1.1 - 1.1 1.1
When exceeding the limit, please redesign the system.
- 1.2 - 1.2 1.2
Total amount of refrigerant =
- 0.9 - - - Pre-Charged refrigerant amount + Additional refrigerant charge amount at local site
Limit on the total amount of refrigerant: 13.1kg
- - - - -
MUG0401
- 1.6
L3
L2
L1
L6
L5
L4
A B
L2 Ø9.52: 10 m L3 Ø9.52: 5 m
L6 Ø6.35: 4 m L7 Ø6.35: 5 m
B MMU-UP0181HP* C MMU-UP0071MH*
MUG0501 MUG0601
- 1.6 - 1.6
L7
C D
L4 Ø9.52: 3 m
D MMD-UP0071SPH*
66-EN