2.6 Provisions in the NBC Concerning HVAC

2.6.1 Definitions

Accidental Contact

Any inadvertent physical contact with power transmission equipment prime mover machines or machine parts which could result from slipping falling sliding tripping or any other unplanned action or movement

Air Conditioning

The process of treating air so as to control simultaneously its temperature, humidity, cleanliness and distribution to meet the requirements of the conditioned space.

Boiler

A closed vessel for heating water or for application of heat to generate steam or other vapor to be used externally or to itself.

Capacity of Works, Project or Plant

The total horsepower of all engines, motors, turbines or other prime movers installed, whether in operation or not

Compressor

A mechanical device for the purpose of increasing the pressure upon the refrigerant

Condenser

A vessel or arrangement of pipes or tubing in which vaporized refrigerant is liquefied by the removal of heat.

Condemned Boiler or Unfired Pressure Vessel

A boiler or unfired pressure vessel that has been inspected by the Building Official and declared unsafe or disqualified and power stamped or marked designating its rejection.

Crane

Means a machine for lifting or lowering a load and moving it horizontally, the hoisting mechanism being an integral part of the machine.

Duct

A passageway made of sheet metal or other suitable material not necessarily leak tight, for conveying air or other gases at low pressure.

Enclosed

Means that the moving parts of a machine are so guarded that physical contact by any part of the human body is precluded or prevented. This does not however prohibit the use of hinged, sliding or otherwise removable doors or sections to permit inspection, lubrication or proper maintenance.

Evaporation

That part of the AC/refrigeration system in which liquid refrigerant is vaporized to produce refrigeration.

External Inspection

An inspection made on boiler during operation.

Guarded

Shielded, fenced or otherwise protected by means of suitable enclosure guards, covers or standard railings, so as to preclude the possibility of accidental contact or dangerous approach to persons or objects.

Internal Inspection

An inspection made when a boiler is shut down, with hand holes, manholes, or other openings opened or removed to permit inspection of the interior.

Liquid Receiver

A vessel permanently connected to a system by inlet and outlet pipes for storage of a liquid refrigerant.

Locomotive Boiler

A boiler mounted on a self-propelled track locomotive used to furnish motivating power for traveling on rails.

Low Pressure Heating Boiler

A boiler operated at pressures not exceeding 1.05 kgs/sqm with steam or water temperature not exceeding 250°F

Machine

The driven unit of an equipment.

Machine House

An enclosure for housing the hoisting mechanism and power plant.

Machine Parts

Any or all moving parts of a machine.

Mechanical Works Plant

Includes steam plantsinternal combustion engine plants, hydraulic power plants, pumping plants, refrigerating plants, air conditioning plants, mill shops, factories, foundries, shipyards, etc. containing any mechanical equipment, machinery or process, driven by steam, internal or external combustion fuel, electricity, gas, air, water, heat, chemicals or other prime movers

Point of Operation

That part of a machine which performs an operation on the stock or material and/or that place or location where stock or material is fed to the machine. A machine may have more than one point of operation.

Portable Boiler

An internally fired boiler which is self- contained, primarily intended for temporary location

Prime Mover

An engine or motor operated by steam, gas, air, electricity, liquid or gaseous fuels, liquids in motion or other forms of energy whose main function is to drive or operate, either directly of indirectly, other mechanical equipment.

Process Machine

An equipment designed and operated for a specific purpose.

Refrigerant

A substance which produces a refrigerating effect by its absorption of heat while expanding or evaporating.

Ton of Refrigeration

The useful refrigerating effect equal to 12,000 BTU/hour; 200 BTU/min

Unfired Pressure Vessel

A vessel in which pressure is obtained from an external source or from an indirect application of heat

Ventilation

Process of supplying or removing air by natural or mechanical means to or from any space

Location of Boilers

a) Boilers may be located inside buildings provided that the boiler room is of reinforced concrete or masonry and that the boiler room shall not be used for any other purpose.

b) In case the main building is not made up of fire resistive materials, boilers shall be located outside the building at a distance of not less than 3.00 m from the outside wall of the main building and the building housing the boiler shall be made up of fire resistive materials.

c) no part of the boiler shall be closer than one meter from any wall

d) fire tube boilers shall be provided with sufficient room for removal/replacement of tubes either thru the front or rear.