Cap 478I Sched 4 TRUNKED MECHANICAL VENTILATION SYSTEMS (MERCHANT SHIPPING (SEAFARERS) (CREW ACCOMMODATION) REGULATION; MERCHANT SHIPPING (SEAFARERS) ORDINANCE)

Contents of Section

Chapter:	478I	Title:	MERCHANT SHIPPING (SEAFARERS) (CREW ACCOMMODATION) REGULATION	Gazette Number:
Schedule:	4	Heading:	TRUNKED MECHANICAL VENTILATION SYSTEMS	Version Date:	30/06/1997

[sections 3, 16 & 42]

(1) The trunked mechanical ventilation system referred to in section 16 of this Regulation (in this Schedule referred to as "the system") shall, in relation to the spaces specified in column 2 of Table I of this Schedule, be capable of the respective standards of performance specified in column 3 or 4 of that Table, whichever standard shall be the higher in the circumstances. In this paragraph and in Table I of this Schedule, the term "spaces" (艙位) excludes the spaces mentioned in Table II of this Schedule.
(2) The system shall, in relation to the spaces specified in column 2 of Table II, be capable of the respective standards of performance specified in columns 3 and 4 of that Table.
(3) A supply system shall be provided for the galley to provide the air changes required in Table II. That supply system may serve the provision store rooms as well as the galley, but shall be separate from the supply system for any other spaces.
(4) A separate exhaust system shall be provided for the galley to provide the air changes required in Table II.
(5) If any provision store room is served by a fan which provides warmed air for any other space, the store room shall be provided with ventilation trunking separate from that serving such other space.
(6) The clear area of the exhaust openings provided in conjunction with the system shall be sufficient to ensure that the velocity of air at each exhaust opening does not exceed 305 metres per minute when the system is in operation.
(7) The speed of every supply fan forming part of the system shall be capable of being varied where DC motors are used.
(8) The system shall be quiet in operation.
(9) All trunking forming part of the system shall be fitted with non-return flaps where such flaps are necessary for the exclusion of effluvia and the preservation of health of the crew.
(10) If the system is designed to circulate heated air as the sole means of heating the crew accommodation, the system shall be sub-divided into sections which can be separately controlled to the extent necessary to enable a comfortable temperature to be maintained in all parts of the crew accommodation.
(11) The spare gear referred to in section 16(6) of this Regulation shall be-

For Air Conditioning Units, Supply and Exhaust Fans, Refrigerating Machinery and Seawater Pump

Motors: (for each size fitted)

1-set Bearings

Starters: (for each size fitted)

1-set Contacts

1-set Springs

1-Operating Coil

Mechanical Spares for Pump: (for each size fitted)

1-set Wearing Rings

1-set Seal parts

For Air Conditioning Units

1-set Air Filter Cells (if throw-away type fitted)

1-set Fan Bearings for A/C Unit

1-set Vee Belts of each size and type fitted

For Refrigerating Machinery

Compressor: (for each size fitted)

1-Gasket Set

1-Shaft Seal Replacement

1-set Piston Rings

1-complete set Connecting Rod Bolts and Nuts

1-complete set Connecting Rod Bearings

1-set Discharge Valve Discs

1-set Discharge Valve Springs

1-set Suction Valve Discs

1-set Suction Valve Springs

1-Main Bearing-Pump End

1-Main Bearing-Seal End

2-Pump End Bearing Washers (Bronze)

2-Seal End Bearing Washers (Bronze)

2-Seal End Thrust Washers (Steel)

1-Oil Filter

Condenser: (for each size fitted)

1-set End Cover Gaskets

1-set Condenser Anodes

1-Tube Cleansing Brush

Miscellaneous:

1-Oil Differential Switch

1-High/Low Pressure Switch

1-set Drier Cores

1-Relief Valve

1-set Packing for Refrigerating Line Valves

1-set Vee Belts of each size fitted

1-Expansion Valve of each size fitted

1-Leak Detector

TABLE I

(not applicable to Spaces specified in Table II)

1 Cate-gory	2 Space	3 Fresh air changes per hour	4 Volume of fresh air in cubic metres per minute, for each seafarer likely to use the room at any one time
A (i) (ii)	Accommodation above the Upper Deck Rooms (other than those in Category (ii)) (1) outside rooms (other than rooms adjoining machinery casings) (2) inside rooms and rooms adjoining machinery casings Mess rooms, smoking rooms and recreation rooms (1) not adjoining machinery casings (2) adjoining machinery casings	12 15 15 18	1.42 1.42 0.71(a) 0.71(a)
B (i) (ii)	Accommodation below the Upper Deck of Motor Vessels Rooms (other than those in Category (ii)) (1) outside rooms (other than rooms adjoining machinery casings) (2) inside rooms and rooms adjoining machinery casings Mess rooms, smoking rooms and recreation rooms (1) not adjoining machinery casings (2) adjoining machinery casings	12 15 15 18	1.42 1.70 0.71 0.71
C (i) (ii)	Accommodation below the Upper Deck of Steam Ships Rooms (other than those in Category (ii)) (1) outside rooms (other than rooms immediately above or adjoining machinery casings) (2) inside rooms and rooms immediately above or adjoining machinery casings Mess rooms, smoking rooms and recreation rooms (1) not adjoining machinery casings (2) adjoining machinery casings	12 18 18 20	1.42 1.70 0.85(b) 0.85(b)
D	Passageways above and below the Upper Deck Adjoining machinery casings	4	--

(a) Provided that whatever the number of seafarers likely to use the room at any one time, the total volume of fresh air per minute shall not be required to exceed such volume per minute as would produce 20 fresh air changes per hour.

(b) Provided that whatever the number of seafarers likely to use the room at any one time, the total volume of fresh air per minute shall not be required to exceed such volume per minute as would produce 25 fresh air changes per hour.

TABLE II

1 Categ-ory	2 Space	3	4
		Fresh air changes per hour
		Supply	Exhaust
E	Galleys	20(c)	40
F	Sanitary accommodation, laundries, drying rooms and pantries Private or semi-private	(d) (d)	15 10
G	Wards in permanent hospitals	12 or such greaternumber as would result in the supply of not less than 1.42 cubic metres fresh air per minute for each bed in the ward	--
H	Dry provisions store rooms	Not less than 10and not more than 20(e)	--

(d) Mechanical supply ventilation may be fitted in addition to the mechanical exhaust ventilation provided that the volume of air supplied does not exceed that provided by the exhaust.

(e) Subject to the provisions of section 33(3) of this Regulation.