V. Installation

10. Cautions for refrigerant leaks

10-1. Introduction

The DVM system, like most other air conditioning systems, uses R-22 as its refrigerant. R-22 itself is an entirely safe non-toxic, non-combustible refrigerant but care must nevertheless be taken to ensure that the air conditioning facilities are installed in a room which is sufficiently large to avoid a *dangerous concentration of refrigerant gas in the unlikely event of a serious leak in the system.

* Dangerous concentration

Dangerous concentration means the maximum concentration of CFC gas which can be dealt quickly and with without damage to the person in the case of a leak of refrigerant into the air. The unit of measurement of the dangerous concentration is kg/m3 (the weight in kg of CFC gas in 1m3 of air) for ease of calculation.

Dangerous concentration of R-22: 0.3kg/m3

Outdoor unit

 

 

Direction of

System No. 1

refrigerant flow

Indoor unit

Room where refrigerant leak has occurred (Outflow of all the refrigerant in System No. 1)

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3759 specifications

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