Daikin EWYE019CZN-A1 handleiding
Handleiding
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D-EIMHP01812-24_00EN 7/47
• Open (naked) flames shall not be permitted in machinery rooms, except for welding, brazing or similar activity
and then only provided the refrigerant concentration is monitored and adequate ventilation is ensured. Such
open flames shall not be left unattended.
• A remote switching (emergency type) for stopping the refrigerating system shall be provided outside the room
(near the door). A similar acting switch shall be located at a suitable location inside the room.
• All piping and ducting passing through floors, ceiling and walls of machinery room shall be sealed.
• Hot surfaces shall not exceed a temperature of 80 % of the autoignition temperature (in °C) or 100 K less than the
autoignition temperature of the refrigerant, whichever is lower.
Refrigerant
Self ignition temperature
Maximum surface temperature
R454C
444 °C
700 °C
• Machinery rooms shall have doors opening outward and sufficient in number to ensure freedom for persons to
escape in an emergency; the doors shall be tight fitting, selfclosing and so designed that they can be opened
from inside (antipanic system).
• Special machinery rooms where the refrigerant charge is above the practical limit for the volume of the room
shall have a door that either opens directly to the outside air or through a dedicated vestibule equipped with
selfclosing, tightfitting doors.
• The ventilation of machinery rooms shall be enough both for normal operating conditions and emergencies.
• Ventilation for normal operating conditions shall be in accordance with national regulations.
• The emergency mechanical ventilation system shall be activated by a detector(s), located in the machinery
room.
• This ventilation system must be:
- independent of any other ventilation system on the site.
- provided with two independent emergency controls one located outside the machinery room, and the other
inside.
• The emergency exhaust ventilation fan shall:
- Be either in the air flow with the motor outside the airflow or rated for hazardous areas (according to the
assessment).
- Be located to avoid pressurization of the exhaust ductwork in the machinery room.
- Not cause sparks to occur if it contacts the duct material.
• Airflow of the emergency mechanical ventilation shall be at least:
V = 0,014 × m2/3
Where
V is air flow in m3/s;
m Is the amount of refrigerant present in the machine room, in kg;
0,014 Is a conversion factor.
• Mechanical ventilation shall be operated continuously or shall be switched on by the detector.
• Detector shall automatically activate an alarm, start mechanical ventilation and stop the system when it triggers
• The location of detectors shall be chosen in relation to the refrigerant and they shall be located where the
refrigerant from the leak will concentrate
• The positioning of the detector shall be done with due consideration of local airflow patterns, accounting for
location sources of ventilation and louvers. Consideration shall also be given to the possibility of mechanical
damage or contamination.
• At least one detector shall be installed in each machinery room or the occupied space being considered and/or
at the lowest underground room for refrigerants heavier than air and at the highest point for refrigerants lighter
than air.
• Detectors shall be continuously monitored for functioning. In the case of a detector failure, the emergency
sequence should be activated as if refrigerant had been detected.
• The preset value for the refrigerant detector at 30 °C or 0 °C, whichever is more critical, shall be set to 25 % of
the LFL. The detector shall continue to activate at higher concentrations.
Refrigerant
LFL
Threshold level
R454C
0,293 kg/m³
0,0732 kg/m³
20000 ppm
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Productinformatie
| Merk | Daikin |
| Model | EWYE019CZN-A1 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 8033 MB |
