Daikin RXYQ96PYDN, Руководство по обслуживанию

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SiUS34-801A_b Test Operation
VRVIII R-410A Heat Recovery 60Hz 237
Maximum concentration level
The maximum charge of refrigerant and the calculation of the maximum concentration of refrigerant
is directly related to the human-occupied space into which it could leak.
The unit of measurement of the concentration is lb/ft
3
(the weight in lb of the refrigerant gas in 1 ft
3
volume of the occupied space).
Compliance to the local applicable regulations and standards for the maximum allowable
concentration level is required.
1.direction of the refrigerant flow
2.room where refrigerant leak has occurred (outflow of all the refrigerant from the system)
Pay a special attention to the place, such as a basement, where refrigerant can stay, since
refrigerant is heavier than air.
Procedure for checking maximum concentration
Check the maximum concentration level in accordance with steps 1 to 4 below and take whatever
action is necessary to comply.
1. Calculate the amount of refrigerant (lb) charged to each system separately.
Note:
Where a single refrigerant facility is divided into 2 entirely independent refrigerant systems, use
the amount of refrigerant with which each separate system is charged.
2. Calculate the smallest room volume (ft
3
)
For the following cases, calculate the volume of (A), (B) as a single room or as the smallest
room.
A. Where there are no smaller room divisions
B.
Where there is a room division but there is an opening between the rooms sufficiently large to
permit a free flow of air back and forth.
1.opening between rooms
2.partition
Where there is an opening without a door or where there are openings above and below the door
that are each equivalent in size to 0.15% or more of the floor area.
amount of refrigerant in a
single unit system (amount
of refrigerant with which the
system is charged before
leaving the factory)
+
additional charging amount
(amount of refrigerant added
locally in accordance with the
length or diameter of the
refrigerant piping)
=
total amount of
refrigerant (lb) in
the system
2
1
1
2