Air Purge; Adding Refrigerant - Toshiba MCY-MAP0604HT8 Installation Manual

Outdoor Unit
 Air purge
NOTE
For the air purge at installation time (Discharge of air in connecting pipes), use "Vacuum pump method" from viewpoint
of the protection of the earths environment.
• For protection of the earths environment, do not discharge the refrigerant gas in the air.
• Eliminate the remaining air (nitrogen gas, etc.) in the unit by using a vacuum pump.
If gas remains, performance and reliability of the unit may be reduced.
After the airtight test, discharge nitrogen gas. Then connect the gauge manifold to the service ports at suction gas
side, discharge gas side and liquid side, and connect the vacuum pump as shown in the following figure.
Perform vacuuming for suction gas side, discharge gas side and liquid side.
• Perform vacuuming from both suction gas side, discharge gas side and liquid side.
• Perform vacuuming from both liquid and gas sides.
• Use a vacuum pump with counter-flow preventive function so that oil in the pump does not back up in the pipe
of the air conditioner when the pump has been stopped. (If oil in the vacuum pump enters in to the air conditioner
with R410A refrigerant, an error may occur in the refrigeration cycle.)
Connected to indoor unit
Main pipe
Brazed
Fully closed
• Use a vacuum pump that has a high vacuum (below -755 mmHg) and a large exhaust gas amount (over 40 L /
minute).
• Perform vacuuming for 2 or 3 hours though time differs due to pipe length.
In this time, check all valves at liquid and gas sides are fully closed.
• If vacuuming valve amount is not decreased to below -755 mmHg even after vacuuming for 2 hours or more,
continue vacuuming for 1 hour or more.
If -755 mmHg or less cannot be obtained by 3 hours or more vacuuming, detect and repair the leak.
• When the vacuuming valve has reached -755 mmHg or less after vacuuming for 2 hours or more, close valves
VL and VH on the gauge manifold fully. Stop the vacuum pump, leave it as it is for 1 hour and then check the
vacuum does not change. If it does change then there may be a leak within the system.
• After the above procedure for vacuuming has finished, exchange the vacuum pump with a refrigerant cylinder
and advance to the additional charging of refrigerant.
29-EN
Installation Manual
Low pressure High pressure
guage
guage
Ball valve fully closed
(gas side)
Gauge
Outdoor unit
manifold
Service port
Service port
Packed valve fully closed
Vacuum pump
(liquid side)
Outdoor Unit
– 15 –
 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 valve.
Outdoor unit type MAP060
Charging amount (kg)
Additional refrigerant
Real length of liquid
=
charge amount at local
pipe
site
Table 1
Liquid pipe dia. (mm) 6.4
Additional refrigerant amount / 1 m
0.025
liquid pipe (kg / m)
Table 2
Capacity rank
Equivalent to HP
MMU-AP****H
4-way cassette
MMU-AP****MH(-E)
2-way cassette MMU-AP****WH
1-way cassette MMU-AP****YH(-E) / SH(-E)
MMD-AP****BH(-E)
Duct MMD-AP****SPH(-E)
MMD-AP****H(-E)
Indoor unit
model name
Ceiling MMC-AP****H(-E)
MMK-AP****3H(-T)
High wall
MMK-AP****4MH-E / 2H
MMF-AP****H(-E)
MML-AP****H(-E)
Floor standing
MML-AP****BH(-E)
MML-AP****NH-E
Table 3
Outdoor unit type
Compensation by outdoor HP (kg)
Installation Manual
MAP080
3.9
Additional refrigerant Corrective amount of
charge amount per 1 m refrigerant depending
×
+ +
liquid pipe on the indoor units
(Table 1) (Table 2)
9.5
0.055
007 009 012 015 018 024 027 030 036 048 056
0.8 1.0 1.25 1.7 2.0 2.5 3.0 3.2
- 0.4 0.4 0.8 0.8 0.8 0.8 0.8
0.4 0.4 0.4 0.6 0.6 - - -
0.4 0.4 0.4 0.5 0.7 0.7 0.7 0.7
0.4 0.4 0.4 0.5 0.5 0.6 - -
0.3 0.3 0.3 0.5 0.5 0.8 0.8 0.8
0.3 0.3 0.3 0.5 0.5 - - -
- - - - 0.8 1.0 1.0 -
- - - 0.5 0.5 0.7 0.7 -
0.5 0.5 0.5 0.7 0.7 0.7 - -
0.3 0.3 0.3 - - - - -
- - - 0.7 0.7 1.0 1.0 -
0.5 0.5 0.5 0.5 0.8 0.8 - -
0.3 0.3 0.3 0.5 0.5 0.7 - -
0.5 0.5 0.5 0.5 0.5 - - -
MAP 060 MAP 080
- 1.6 - 1.0
Compensation by
outdoor HP
(Table 3)
4.0 5.0 6.0
1.2 1.2 1.2
- - -
1.1 1.1 1.1
- - -
1.1 1.1 1.1
- - -
1.0 1.3 -
1.1 1.1 -
- - -
- - -
1.3 1.3 1.3
- - -
- - -
- - -
(kg)
30-EN