Fire Code of the Philippines Ebook - SafetySignsPH.com Fire Code of the Philippines eBook - SafetySignsPH | Page 395

B. Ammonia Diffusion Systems
1. Ammonia refrigerating plants containing more than thirteen and one
half kilograms (13.5 kg) of refrigerant shall be equipped with facilities
for diffusing the ammonia vapors.
2. Systems containing more than thirteen and one half kilograms (13.5 kg)
of refrigerant shall be discharged to the outside of the building at least
sixty one centimeters (61 cm) above the roof and so located that
discharged refrigerants will not cause discomfort or harmful effects to
persons or such discharge shall be directed into a tank of fresh water
having a capacity of eight and a half liters (8.5 ℓ) for each kilogram of
refrigerant and used for no other than ammonia absorption.
3. Systems containing more than forty-five kilograms (45 kg) of refrigerant
shall be provided with an approved diffuser consisting of sixty-three
and one half millimeters (63.5 mm) hose connections, mixing chamber
and a permanent discharge connection to the sewer or drainage
system.
4. Control valves for diffusers shall be outside of the machinery room in a
box protected against tampering. Such valve control box shall be
plainly marked “FOR FIRE SERVICE USE ONLY – AMMONIA CONTROL
VALVES.”
SECTION 10.4.12.3
PROTECTION AND MAINTENANCE
A. All refrigeration equipments shall be kept clean, free from accumulations
of oil, dirt, waste and other debris, and shall be easily accessible at all
times and shall undergo preventive maintenance program.
B. Each refrigerating system shall be provided with a legible metal sign
permanently attached and easily noticeable, indicating thereon the
name and address of the manufacturer or installer, the kind and total
number of kilograms (pounds) of refrigerant contained in the system, and
the field test pressure applied.
C. Systems containing more than forty-five kilograms (45 kg) of refrigerant
shall be provided with signs having letters not less than one and one fourth
centimeters (1.25 cm) in height designating the main shut-off-valves to
each vessel, main steam or electrical control, remote control switch and
pressure limiting device.
D. Valve control box shall be plainly marked “FOR FIRE SERVICE USE ONLY –
REFRIGERANT CONTROL VALVES.”
E. No person shall be allowed to use any ozone depleting refrigerants in any
mechanical refrigeration system.
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