18
Addition of refrigerant
After vacuuming work, exchange the vacuum pump with the refrigerant bomb and then start the additional charging
work of refrigerant.
Calculation of additional refrigerant charge amount
Refrigerant charge amount at shipment from the factory does not include the refrigerant for pipe at the local site.
For refrigerant to be charged in pipe at the local site, calculate the amount and charge it additionally.
NOTE) If the additional refrigerant amount indicates minus as the result of calculation, use the air conditioner
without addition of refrigerant.
Additional refrigerant
= Real length
× Additional refrigerant charge
+ Corrective amount of refrigerant
charge amount at local site
of liquid pipe
amount per 1m liquid pipe (Table 1)
combined horse power (Table 2)
Table 1
Charging of refrigerant
• Keeping valve of the outdoor unit closed, be sure to charge the liquid refrigerant into service port at liquid side.
• If the specified amount of refrigerant cannot be charged, open fully valves of outdoor unit at liquid and gas sides,
operate the air conditioner in COOL mode under condition that valve at gas side is a little returned to close side
(MAP0801
∗
, MA1001
∗
, MAP1201
∗
only), and then charge refrigerant into service port at gas side. In this time,
choke the refrigerant slightly by operating valve of the bomb to charge liquid refrigerant. The liquid refrigerant may
be charged suddenly, therefore be sure to charge refrigerant gradually.
• When refrigerant leaks and refrigerant shortage occurs in the system, recover the refrigerant in the system and
recharge refrigerant newly up to the correct level.
REQUIREMENT
<Entry of refrigerant charge amount>
• Fill the additional refrigerant record column of the wiring diagram indication plate with the additional refrigerant
amount at installation work, total refrigerant amount and the name of the service man who charged refrigerant
at installation time.
• The total refrigerant amount means the total value of the refrigerant amount at shipment and the additional
refrigerant amount at installation time. The refrigerant amount at the shipment is one described on the “Unit
nameplate”.
Table 2
Liquid pipe dia. (mm)
Additional refrigerant amount/1m liquid pipe (kg/m)
6.4
9.5
12.7
15.9
19.1
22.2
0.025
0.055
0.105
0.160
0.250
0.350
Combined HP
(HP)
5
6
8
10
12
14
16
18
20
22
24
26
Combined outdoor units
(HP)
5
6
8
10
12
8
6
8
8
10
8
10
10
12
10
8
8
6
12
12
8
8
8
10
8
8
C (Corrective amount of refrigerant)
(kg)
0.0
0.0
1.5
2.5
3.5
0.0
0.0
0.0
3.0
5.0
0.0
7.0
–4.0
–4.0
Combined HP
(HP)
28
30
32
34
36
38
40
42
44
46
48
Combined outdoor units
(HP)
10
10
8
10
10
10
12
10
10
8
8
8
8
12
12
10
10
8
8
8
12
12
12
10
10
8
8
10
10
10
8
10
10
10
10
12
10
10
10
12
12
10
10
12
12
12
10
12
12
12
12
C (Corrective amount of refrigerant)
(kg)
–2.0
0.0
1.0
–6.0
3.0
–6.0
4.0
–6.0
–6.0
–5.0
–4.0
–2.0
0.0
2.0
Heat pump
model
MMY-MAP0501HT
∗∗∗∗∗
MMY-MAP0601HT
∗∗∗∗∗
MMY-MAP0801HT
∗∗∗∗∗
MMY-MAP1001HT
∗∗∗∗∗
MMY-MAP1201HT
∗∗∗∗∗
8.5
12.5
Outdoor unit Model
Charging amount (kg)
Cooling only
model
MMY-MAP0501T8
MMY-MAP0601T8
MMY-MAP0801T8
MMY-MAP1001T8
MMY-MAP1201T8
8.0
11.0
Outdoor unit Model
Charging amount (kg)
Summary of Contents for MAP0601HT7
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