(a)
All
connections to room or space heaters should be of iron, aluminum,
brass or copper pipe and fittings. Flexible connections, when used,
shall bear the stamp of approval of the National Board of Fire Underwriters
of the A.G.A.
(b)
No
soft seat valves will be approved and all valve stems shall be properly
packed in such manner as to prevent leakage. A stop cock shall be
installed in the line serving heating appliances at the time the appliance
is installed and said stop cock shall be accessibly located within
2' of the appliance and in the same room as the appliance. A stop
cock shall be installed at the floor line or baseboard on all cook
stove openings before final inspection of the installation.
(1965 Code, sec. 15-192)
(a)
Furnaces generally.
All floor furnaces, central heating
units, suspended heating units, insert type wall furnaces such as
Panelray and all controls shall be approved by A.G.A. or the National
Board of Fire Underwriters. All controls on boilers shall be approved
by the A.G.A.
All floor furnaces, central heating units, suspended heating
units, and boilers used for heating equipped with manually operated
or automatic temperature controls shall be equipped with safety pilot
controls that will shut off the gas to the main burner in the event
the pilot is extinguished or blown out.
All heating units with a fan to furnish heated air to various
rooms in a house or building shall be equipped with a heat limit control
switch located in the discharge side of duct and as near the heating
units as possible. In the event of fan or motor failure, the heat
limit control switch will act as a limiting protection device. Such
heat limit control shall be such type that it cannot be set above
2500 F. The safety pilot shall be connected so that a failure in pilot
will shut off gas supply to main burner.
No heating unit or controls shall be placed in a closet, room
or any other enclosed space without providing ventilating openings
as required by A.G.A. at both top and bottom of enclosure equivalent
to 12 square inches each for appliances having 40,000 Btu input or
less, and 1 square inch additional per 1000 Btu input shall be provided
both top and bottom for appliances having more than 40,000 Btu input.
Inlet and outlet ducts shall be connected to heating units located
in such enclosed spaces. All heating supply ducts shall be constructed
of metal in all residential or buildings of frame construction, and
shall extend from the heating unit to the grill openings. All return
air ducts shall extend from the heating units through the wall or
floor of the room in which the heating unit is installed, and ducts
shall be of metal.
A gas fired unit heater with propeller fan attached shall not
be used as an insert type of duct heater. A unit heater shall not
be attached to a warm air duct system unless listed by A.G.A. for
such installation.
All heating appliances equipped with a gas regulator or a gas
operated diaphragm valve shall have a relief or vent line installed
from the regulator or diaphragm valve back to the main burner of the
appliance.
(b)
Duct furnaces.
The heating unit shall be listed as a
duct furnace by the A.G.A. The unit shall be equipped with the following
controls: pressure regulator, approved automatic heat limit control
that cannot be set higher than 250° F., and safety pilot burner
control. The controls shall be installed so that the main burner gas
supply will shut off in event of overheating, safety pilot failure
or motor or belt failure.
The heat exchanger shall be highly resistant to acid, corrosion,
and moisture. The heating unit shall be installed on the discharge
side of the blower. The blower used with the unit shall have sufficient
capacity to deliver the required volume of air against the combined
static resistance of the unit and the duct system.
When installed in connection with a cooling system, the heating
unit shall be installed in a bypass duct around the cooling system
with slide type dampers on each side of the heating unit. Removable
inspection plates not less than 6" wide and 23 [sic] the height of
the duct in size shall also be installed on each side of the heating
unit.
The heating unit shall be installed at least 3' from any wall
or ceiling or any other combustible material, and at least 1' above
the floor and shall be accessible on all sides at all times. Deviation
from this requirement will not be permitted except by written approval
from the chief plumbing inspector.
(c)
Attic furnaces.
A heating unit installed in an attic
space shall be approved as an attic furnace by the A.G.A. and the
units shall be equipped with controls as specified for duct furnaces.
The heating units shall be installed at least 1' from any ceiling
or roof. There shall be at least 3' clearance on the control and access
side of the furnace. The area where an attic furnace is located shall
be floored and shall extend a distance not less than 3' from all sides
of the unit. A means of access shall be provided with a permanent
ladder or stairway and with an unobstructed passage to the service
side of the furnace.
(d)
Below the floor heating units.
The heating unit shall
be approved as a below the floor heating unit by the A.G.A. The unit
shall be equipped with controls and shall be accessible as specified
for attic furnaces. There shall be at least 3' horizontal clearance
on control and access side of unit.
(1965 Code, sec. 15-193)
(a)
All
water heaters installed shall be approved by the A.G.A. and their
stamp of approval shall be plainly marked on such heaters. The temperature
and pressure valve, safety pilot and thermostat shall be approved
by the A.G.A. All gas fired water heating boilers and storage type
water heaters shall be equipped with a thermostat and separate pilot
burner; the burner shall be equipped with a safety gas control which
will shut off the main burner gas supply if the pilot should be extinguished.
In addition to the thermostat all such water heaters shall be equipped
with a temperature and pressure relief valve set so that water will
be released from the heater when the pressure exceeds 125 pounds per
square inch, or when the temperature exceeds 200 degrees F. This valve
shall be so constructed that it will require manual attention to replace
the fuse, link or plug. This valve shall be placed in the hot water
line, not more than 4" from the hot water outlet of the heater and
shall be accessible at all times. The relief line from said relief
valve shall be run independently to the outside of the building and
turned down so as to discharge on the ground, and it shall be of galvanized
pipe or hard temper copper of not less than 3/8" size. The discharge
end of said relief line shall not be more than 2' above the ground,
so as to protect anyone passing from being scalded. No water heater
shall be placed more than 4'6" above the floor, of the room or closet
in which the hot water heater, is located.
(b)
Boilers
used as water heaters shall be tested and approved by the state boiler
inspector whose certificate of approval shall be filed in the office
of the city plumbing inspector. Such boilers shall be equipped with
all safety devices and controls listed above.
(c)
Electric
water heaters and controls shall be approved by the Underwriters’
Laboratories, Inc., and the heaters shall be provided with temperature
and pressure relief valve as described for gas water heaters.
(d)
Water
heaters equipped for burning liquid fuel shall be provided with controls
as required for gas fired water heaters.
(1965 Code, sec. 15-194)
All persons are prohibited from connecting pipes whereby high
pressure steam boilers may be supplied with water direct from the
water supply system. All such boilers shall be provided with a tank
or other receptacle of sufficient capacity to provide an emergency
supply of water in case the water supply is shut off. The steam exhaust
from a pressing machine or any other apparatus that has a steam exhaust
shall discharge into a suitable receiver that has been vented above
the building and is trapped and wasted indirectly to an open fixture
or floor drain that is trapped and vented as provided herein. The
steam exhaust from a number of presses or machines may discharge into
a heater or manifold before entering this receiver.
(1965 Code, sec. 15-195)
(a)
All
water wasted after use as a cooling medium for refrigerant in refrigerating
apparatus or waste from any air conditioning apparatus shall not be
directly connected into any waste, soil or sewer of a plumbing system
but shall be discharged at least 3" above the overflow level of a
suitable receptacle or fixture for such waste. Such receptacle shall
be properly trapped and vented as herein provided. Potable water shall
not be used in refrigerating or air conditioning apparatus, unless
the water supply thereto shall be provided with a suitable backflow
preventer or air-relief device located at least 6" above the top of
any chamber or basin in which water may be contained, sprayed or circulated.
(b)
No
water-consuming air conditioning or refrigerating apparatus of any
type shall be placed on any building where said apparatus will project
over any street, sidewalk or public alley or thoroughfare.
(c)
Water
shall not be discharged on roofs unless the stormwater leaders serving
the roof are connected to the city storm sewer or storm drainage system.
Any such water discharge which results in water reaching a street,
street gutter, alley or any public or private premises is prohibited.
(d)
The
drain from the cooling tower shall be indirectly connected to a fixture
or trap that is properly wasted and vented. Louvers on cooling towers
shall be so constructed and maintained as to prevent water from being
blown away from or out of the cooling tower structure. Circulating
pumps for air conditioning systems shall not be placed on the roof
of a building unless the pump is equipped with a mechanical seal or
packless stuffing box. Circulating pumps for air conditioning systems
shall not be placed on the side of a building or in an alley. All
new installations and a replacement in existing air conditioning apparatus
and systems shall be made to comply with the requirements of this
article.
(1965 Code, sec. 15-196)
