Refrigerating machinery rooms

Refrigerating machinery rooms
E.8.1 Refrigerating machinery spaces shall be provided with a suitably arranged forced ventilation
system. In case of group 1 refrigerants, at least the exhaust air is to be conveyed into the open air independently
of other space ventilation ducting. The inlet ducting shall not be connected to the ventilation
system serving the accommodation spaces.
E.8.2 In case of group 2 refrigerants, e.g. ammonia, the ventilation of refrigerating machinery spaces
shall be independent from ventilation systems of other ship spaces. The ventilation system is to be of
exhaust type.
E.8.3 Within the ship, the exhaust air ducts of fans serving refrigerating machinery spaces are to be
gastight. The exhaust air shall be conveyed in such a way as to prevent gas ingress into other ship spaces.

E.8.4 Provision shall be made for starting and stopping the fans of refrigerating machinery spaces
from outside the spaces in question. The switches are to be clearly marked.
E.8.5 The rating of forced ventilation systems is subject to the following rules:
 For refrigerating machinery spaces with group 1 refrigerants, forced ventilation shall ensure at
least 30 air changes per hour.
 For refrigerating machinery spaces in with group 2 refrigerants, e.g. ammonia, the minimum capacity
of the fan shall be determined by the formula: