The volume is calculated based on the smallest confined space that refrigerant could discharge into in the event of a rupture. Applying the code for different occupancy classifications, the maximum refrigerant capacity in any system is defined as follows: Occupancy Classification It should also be noted that all VRF systems currently available in North America use R410a refrigerant. VRF systems are classified as: direct with a high probability of leakage. The first order of business is to define the type of system we are dealing with. In this post, I want to specifically address the quantity of refrigerant allowed in any given system. This code outlines all of the safety requirements that must be met in order for a refrigeration system to be approved for installation. In Ontario, the code of reference is CAN/CSA B52 – Mechancial Refrigeration Code. While variable refrigerant flow (VRF) systems offer great flexibility in your designs and can provide outstanding energy savings, there are some code requirements that must be considered.
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