Page 107 - 2018_IMC

SPECIFIC APPLIANCES, FIREPLACES AND SOLID FUEL-BURNING EQUIPMENT

SECTION 907 culated water flow rate as established in the equipment’s
INCINERATORS AND CREMATORIES design specifications.
907.1 General. Incinerators and crematories shall be listed
and labeled in accordance with UL 791 and shall be installed SECTION 909
in accordance with the manufacturer’s instructions. VENTED WALL FURNACES
909.1 General. Vented wall furnaces shall be installed in
SECTION 908 accordance with their listing and the manufacturer’s instruc-
COOLING TOWERS, EVAPORATIVE tions. Oil-fired furnaces shall be tested in accordance with
CONDENSERS AND FLUID COOLERS UL 730.
909.2 Location. Vented wall furnaces shall be located so as
908.1 General. A cooling tower used in conjunction with an not to cause a fire hazard to walls, floors, combustible fur-
air-conditioning appliance shall be installed in accordance nishings or doors. Vented wall furnaces installed between
with the manufacturer’s instructions. Factory-built cooling bathrooms and adjoining rooms shall not circulate air from
towers shall be listed in accordance with UL 1995. bathrooms to other parts of the building.
908.2 Access. Cooling towers, evaporative condensers and 909.3 Door swing. Vented wall furnaces shall be located so
fluid coolers shall be provided with ready access. that a door cannot swing within 12 inches (305 mm) of an air
908.3 Location. Cooling towers, evaporative condensers and inlet or air outlet of such furnace measured at right angles to
fluid coolers shall be located to prevent the discharge vapor the opening. Doorstops or door closers shall not be installed
plumes from entering occupied spaces. Plume discharges to obtain this clearance.
shall be not less than 5 feet (1524 mm) above or 20 feet (6096 909.4 Ducts prohibited. Ducts shall not be attached to wall
mm) away from any ventilation inlet to a building. Location furnaces. Casing extension boots shall not be installed unless
on the property shall be as required for buildings in accor- listed as part of the appliance.
dance with the International Building Code.
909.5 Manual shutoff valve. A manual shutoff valve shall be
908.4 Support and anchorage. Supports for cooling towers, installed ahead of all controls.
evaporative condensers and fluid coolers shall be designed in 909.6 Access. Vented wall furnaces shall be provided with
accordance with the International Building Code. Seismic access for cleaning of heating surfaces, removal of burners,
restraints shall be as required by the International Building replacement of sections, motors, controls, filters and other
Code. working parts, and for adjustments and lubrication of parts
908.5 Water supply. Cooling towers, evaporative coolers requiring such attention. Panels, grilles and access doors that
and fluid coolers shall be provided with an approved water must be removed for normal servicing operations shall not be
supply, sized for peak demand. The quality of water shall be attached to the building construction.
provided in accordance with the equipment manufacturer’s
recommendations. The piping system and protection of the SECTION 910
potable water supply system shall be installed as required by FLOOR FURNACES
the International Plumbing Code.
910.1 General. Floor furnaces shall be installed in accor-
908.6 Drainage. Drains, overflows and blowdown provisions dance with their listing and the manufacturer’s instructions.
shall be indirectly connected to an approved disposal loca- Oil-fired furnaces shall be tested in accordance with UL 729.
tion. Discharge of chemical waste shall be approved by the
appropriate regulatory authority. 910.2 Placement. Floor furnaces shall not be installed in the
floor of any aisle or passageway of any auditorium, public
908.7 Refrigerants and hazardous fluids. Heat exchange hall, place of assembly, or in any egress element from any
equipment that contains a refrigerant and that is part of a such room or space.
closed refrigeration system shall comply with Chapter 11.
Heat exhange equipment containing heat transfer fluids With the exception of wall register models, a floor furnace
which are flammable, combustible or hazardous shall comply shall not be placed closer than 6 inches (152 mm) to the near-
with the International Fire Code. est wall, and wall register models shall not be placed closer
than 6 inches (152 mm) to a corner.
908.8 Cooling towers. Cooling towers, both open circuit and
The furnace shall be placed such that a drapery or similar
closed circuit type, and evaporative condensers shall comply combustible object will not be nearer than 12 inches (305
with Sections 908.8.1 and 908.8.2.
mm) to any portion of the register of the furnace. Floor fur-
908.8.1 Conductivity or flow-based control of cycles of naces shall not be installed in concrete floor construction
concentration. Cooling towers and evaporative condens- built on grade. The controlling thermostat for a floor furnace
ers shall include controls that automate system bleed based shall be located within the same room or space as the floor
on conductivity, fraction of metered makeup volume, furnace or shall be located in an adjacent room or space that
metered bleed volume, recirculating pump run time or is permanently open to the room or space containing the floor
bleed time. furnace.
908.8.2 Drift eliminators. Cooling towers and evapora- 910.3 Bracing. The floor around the furnace shall be braced
tive condensers shall be equipped with drift eliminators and headed with a support framework design in accordance
that have a maximum drift rate of 0.005 percent of the cir- with the International Building Code.

90 2018 INTERNATIONAL MECHANICAL CODE 
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