Caution On Refrigerant Leakage; Countermeasure To Overhigh Refrigerant Thickness - Midea VRF V4 Plus I Series Manual

MCAC-VTSM-2014-04

15.4 Caution on refrigerant leakage

 This air conditioner adopts R410A as refrigerant, which is safe and noncombustible.
 The room for air conditioner should be big enough that refrigerant leakage cannot reach the critical
thickness. Besides this, you can take some action on time.
 R410A critical thickness: 0.3 [kg/m
person)
 Calculate the critical thickness through following steps, and take necessary actions.
1. Calculate the refrigerant charge (A [kg])
2. Total refrigerant charge = delivered refrigerant charge (nameplate) + supplemental refrigerant charge
3. Calculate the indoor volume (B [m
4. Calculate the refrigerant thickness.
A kg
≤ critical thickness 0.3kg/m3
B m3
 Countermeasure to overhigh refrigerant thickness
1. Install mechanical ventilator to reduce the refrigerant thickness
under critical level. (Ventilate regularly)
2. Install leakage detector alarming device related to mechanical
ventilator if you cannot regularly ventilate.
Installation
Model(indoor unit)
Room Name
Eg: Indoor unit (A) of the
first system on second floor
is recorded as:-2F-1A
3
], (Critical thickness: the max thickness of Freon without any harm to
3
]) (as the minimum volume)
R410A DC Inverter VRF V4 Plus Individual Series 50Hz
81