Installation Manual
– 20 –
EN
EN-39
EN-40
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
Do not degas the refrigerant from the air conditioner when the result of additional refrigerant charge amount
calculation is negative value.
Table 1
Table 2
*1 Capacity code of 005 type is the same as 007 type.
(Unit: kg)
Table 3
Outdoor unit type
MHP0406
MHP0506
Charging amount (kg)
3.3
3.3
Additional
refrigerant charge
amount at local site
=
Real length of liquid
pipe
×
Additional refrigerant
charge amount per
1 m liquid pipe
(Table 1)
+
Corrective amount of
refrigerant depending
on the indoor units
(Table 2)
+
Compensation by
outdoor HP
(Table 3)
Liquid pipe dia. (mm)
6.35
9.52
Additional refrigerant amount /
1 m liquid pipe (kg / m)
0.025
0.055
Capacity rank
005 *
1
007
009
012
015
018
024
027
030
036
048
Capacity code
(Equivalent to HP)
0.8
0.8
1.0
1.25
1.7
2.0
2.5
3.0
3.2
4.0
5.0
Indoor
unit
model
name
4-way cassette
MMU-AP****HP*
-
-
0.4
0.4
0.8
0.8
0.8
0.8
0.8
1.2
1.2
MMU-AP****MH*
0.4
0.4
0.4
0.4
0.6
0.6
-
-
-
-
-
2-way cassette MMU-AP****WH*
-
0.4
0.4
0.4
0.5
0.7
0.7
0.7
0.7
1.1
1.1
1-way cassette MMU-AP****YH / SH*
-
0.4
0.4
0.4
0.5
0.5
0.6
-
-
-
-
Duct
MMD-AP****BHP*
-
0.5
0.5
0.5
0.5
0.5
0.7
0.7
0.7
1.1
1.1
MMD-AP****SPH*
0.3
0.3
0.3
0.3
0.5
0.5
0.8
0.8
-
-
-
MMD-AP****HP*
-
-
-
-
-
0.7
0.7
0.7
-
1.1
1.1
Under-ceiling
MMC-AP****HP*
-
-
-
-
0.6
0.6
0.8
0.8
-
1.2
1.2
High wall
MMK-AP****H*
-
0.5
0.5
0.5
0.7
0.7
0.7
-
-
-
-
MMK-AP****HP*
0.3
0.3
0.3
0.3
-
-
-
-
-
-
-
Floor standing
MMF-AP****H*
-
-
-
-
0.7
0.7
1.0
1.0
-
1.3
1.3
MML-AP****H*
-
0.5
0.5
0.5
0.5
0.8
0.8
-
-
-
-
MML-AP****BH*
-
0.3
0.3
0.3
0.5
0.5
0.7
-
-
-
-
MML-AP****NH*
-
0.5
0.5
0.5
0.5
0.5
-
-
-
-
-
Outdoor unit type
MHP0406
MHP0506
Compensation by outdoor HP (kg)
–1.6
–1.6
Example: (040 type)
Additional charge amount R (kg)
= ( Lx × 0.025 kg/m) + ( Ly × 0.055 kg/m) + ( a + b + c + d ) + ( –1.6 kg )
= ( 12 × 0.025 kg) + ( 28 × 0.055 kg) + ( 2.3 kg ) + ( –1.6 kg )
= 2.54 kg
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]
c: Corrective amount of refrigerant depending on the unit C [kg]
d: Corrective amount of refrigerant depending on the unit D [kg]
Charging of refrigerant
• 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 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.
L1
Ø9.52: 10 m
L2
Ø9.52: 10 m
L3
Ø9.52: 5 m
L4
Ø9.52: 3 m
L5
Ø6.35: 3 m
L6
Ø6.35: 4 m
L7
Ø6.35: 5 m
A
MMU-AP0244HP*
B
MMU-AP0184HP*
C
MMU-AP0077MH*
D
MMD-AP0074SPH*
L1
L2
L3
L4
L5
L6
L7
D
C
B
A
1FAN_IM_DHV0100301-00_EN.book Page 20 Saturday, November 4, 2017 2:39 PM
