Installation
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31
Regulation for refrigerant leakage
: the amount of refrigerant leakage should satisfy the following equation for human safety.
If the above equation cannot be satisfied, the following steps must be followed.
- Selection of air conditioning system: Select one of the following
1. Installation of effective opening part: At the top and bottom of the door connecting the room to the outside, create an opening
with or without the door of with 0.15% of floor space or above.
2. Recheck of outside unit capacity and piping length
3. Reduction of the amount of refrigerant
4. Installation of 2 or more security devices (Alarm for gas leakage)
- Change indoor unit type
: Installation position should be over 2m from the floor (Wall mounted type
→
cassette type)
- Adoption of ventilation system
Ventilation system prevents the refrigerant density from increasing when the refrigerant is leaked by the installation.
Ventilation system comes in two types; external air inflow type or exhaust type. External air inflow type is recommended due to
the characteristics of the refrigerant.
Always operate the ventilation system irrelevant from whether the air conditioner is used or not and whether the indoor or not.
When it is impossible to operate this and in case of a refrigerant leakage by the sensor, the ventilation system is automatically
operated.
- Limitation in piping work
: Prepare for earthquake and thermal stress
- Reduction of all refrigerant charge amount of the refrigerant facility (When calculated value exceeds 0.44kg/m
3
)
1. Shorten the refrigerant pipe length.
Change the location of the outside unit and shorten the length of the refrigerant pipe to reduce all refrigerant charge amount.
2. Distribute the outside unit to several units to reduce the refrigerant charge amount per outside unit. (Ex. 20 HP 1 unit
→
10 HP 2 units)
Total amount of refrigerant in the system
Volume of the room at which indoor unit of the least capacity is installed
≤
0.44 ( kg / m
3
)
Note:
Fill in the f-gas Label attached on outside about the quantity of the fluorinated greenhouse gases
Manufacturing site (See Model Name label)
Installation site (If possible being placed adjacent to the service points for the addition or removal of
refrigerant)
The total Charge (
+
)
