CALIFORNIA MECHANICAL CODE — MATRIX ADOPTION TABLE CHAPTER 3 — GENERAL REGULATIONS (Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
Adopting Agency
BSC
BSC-CG
SFM
HCD
DSA
OSHPD
BSCC
DPH
AGR
DWR
CEC
CA
SL
SLC
1
2
1-AC
AC
SS
SS/CC
1
1R
2
3
4
5
Adopt Entire Chapter
X
Adopt Entire Chapter as amended (amended sections listed below)
This state agency does not adopt sections identified with the following symbol: † The Office of the State Fire Marshal's adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.0.
This chapter covers general requirements
for heating, ventilating, air-conditioning, refrigeration,
miscellaneous heat-producing, and energy-utilizing equipment
or appliances. Such equipment or appliances shall comply
with the requirements of this code.
Installers shall furnish satisfactory evidence that the appliance is constructed in accordance with the requirements of this code. The permanently attached label of an approved agency shall be permitted to be accepted as such evidence.
Equipment requiring electrical connections of more than
50 volts shall have a positive means of disconnect adjacent
to and in sight from the equipment served.
Exception: Other power disconnect means shall be acceptable
where in accordance with the California Electrical
Code.
A 120 volt receptacle shall be located within 25 feet
(7620 mm) of the equipment for service and maintenance
purposes. The receptacle outlet shall be on the supply
side of the disconnect switch. The receptacle need not be
located on the same level as the equipment.
Electrical wiring, controls, and connections to equipment
and appliances regulated by this code shall be in accordance
with the California Electrical Code.
A metal guard shall be provided
around exposed flywheels, fans, pulleys, belts, and
moving machinery that are portions of a heating, ventilating,
or refrigerating system.
Listed pipe, pipe fittings,
appliances, appurtenances, equipment, materials, and devices used in a mechanical system shall be listed (third-party certified)
by a listing agency (accredited conformity assessment body) as complying with the approved applicable recognized
standards referenced in this code, and shall be free from
defects. Unless otherwise provided for in this code, materials,
appurtenances, or devices used or entering into the construction of mechanical systems, or parts thereof, shall be submitted
to the Authority Having Jurisdiction for approval.
Each length of pipe and each pipe fitting,
material, and device used in a mechanical system
shall have cast, stamped, or indelibly marked on it any
markings required by the applicable referenced standards
and listing agency, and the manufacturer's mark or name,
which shall readily identify the manufacturer to the end
user of the product. Where required by the approvedstandard that applies, the product shall be marked with
the weight and the quality of the product. Materials and
devices used or entering into the construction of mechanical
systems, or parts thereof, shall be marked and identified
in a manner satisfactory to the Authority Having
Jurisdiction. Such marking shall be done by the manufacturer.
Field markings shall not be acceptable.
Exception: Markings shall not be required on nipples
created from cutting and threading of approved pipe.
Standardslisted or referred to in
this chapter or other chapters cover materials that will
conform to the requirements of this code, where used in
accordance with the limitations imposed in this or other
chapters thereof and their listing. Where a standard covers
materials of various grades, weights, quality, or configurations,
the portion of the listedstandard that is
applicable shall be used. Design and materials for special
conditions or materials not provided for herein shall
be permitted to be used by special permission of the
Authority Having Jurisdiction after the Authority Having
Jurisdiction has been satisfied as to their adequacy. A
list of mechanical standards that appear in specific sections
of this code is referenced in Table 1701.1. Standards
referenced in Table 1701.1 shall be applied as
indicated in the applicable referenced section. A list of
additional standards, publications, practices and guides
that are not referenced in specific sections of this code
appear in Table 1701.2. The documents indicated in
Table 1701.2 shall be permitted in accordance with Section
302.2.
In existing buildings or
premises in which mechanical installations are to be
altered, repaired, or renovated, the Authority Having
Jurisdiction has discretionary powers to permit deviation
from the provisions of this code, provided that such proposal
to deviate is first submitted for proper determination
in order that health and safety requirements, as they
pertain to mechanical systems, shall be observed.
Nothing in this code is intended to prevent
the use of systems, methods, or devices of equivalent or
superior quality, strength, fire resistance, effectiveness, durability,
and safety over those prescribed by this code. Technical documentation shall be submitted to the Authority Having
Jurisdiction to demonstrate equivalency. The Authority Having
Jurisdiction shall have the authority to approve or disapprove
the system, method, or device for the intended purpose.
However, the exercise of this discretionary approval by
the Authority Having Jurisdiction shall have no effect beyond
the jurisdictional boundaries of said Authority Having Jurisdiction.
An alternate material or method of construction so
approved shall not be considered as in accordance with the
requirements, intent, or both of this code for a purpose other
than that granted by the Authority Having Jurisdiction where
the submitted data does not prove equivalency.
Tests shall be made in accordance
with approved testing standards, by an approved testing
agency at the expense of the applicant. In the
absence of such standards, the Authority Having
Jurisdiction shall have the authority to specify the test
procedure.
The Authority Having Jurisdiction
shall have the authority to require tests to be made or
repeated where there is reason to believe that a material
or device no longer is in accordance with the
requirements on which its approval was based.
An alternative
engineered design shall comply with the intent of the provisions
of this code and shall provide an equivalent level of quality,
strength, effectiveness, fire resistance, durability, and
safety. Material, equipment, or components shall be designed
and installed in accordance with the manufacturer's installation
instructions.
The registered design
professional shall indicate on the design documents that
the mechanical system, or parts thereof, is an alternative
engineered design so that it is noted on the construction
permit application. The permit and permanent permit
records shall indicate that an alternative engineered
design was part of the approved installation.
The registered design professional
shall submit sufficient technical data to substantiate
the proposed alternative engineered design and to
prove that the performance meets the intent of this code.
The registered design
professional shall provide two complete sets of signed and
sealed design documents for the alternative engineered
design for submittal to the Authority Having Jurisdiction.
The design documents shall include floor plans of the
work. Where appropriate, the design documents shall
indicate location, sizing, and loading of appurtenances,
equipment, appliances, and devices.
An approval of an alternative
engineered design shall be at the discretion of the
Authority Having Jurisdiction. The exercise of this discretionary approval by the Authority Having Jurisdiction
shall have no effect beyond the jurisdictional boundaries
of said Authority Having Jurisdiction. An alternative
engineered design so approved shall not be considered
as in accordance with the requirements, intent, or both
of this code for a purpose other than that granted by the
Authority Having Jurisdiction.
The Authority Having Jurisdiction
shall have the authority to require testing of the
alternative engineered design in accordance with Section
302.2.1, including the authority to require an independent
review of the design documents by a registered
design professional selected by the Authority Having
Jurisdiction and at the expense of the applicant.
The alternative
engineered design shall be tested and inspected in accordance
with the submitted testing and inspection plan and
the requirements of this code.
The installation of equipment
and appliances regulated by this code shall be in accordance
with the conditions of the listing, the manufacturer's installation
instructions and this code. The manufacturer's installation
and operating instructions shall be attached to the
appliance. Clearances of listedequipment and appliances
from combustible materials shall be as specified in the listing
or on the rating plate.
[Not adopted for OSHPD 1, 1R, 2, 3, 4 & 5] Central heating furnaces and boilers installed in closets or alcoves shall be listed for such installation. Central heating furnaces not listed for closet or alcove installation shall be installed in a room or space having a volume not less than 12 times the total volume of the furnace. Central heating boilers not listed for closet or alcove installation shall be installed in a room or space having a volume 16 times the volume of the boiler.
Where the ceiling height of the room or space exceeds 8 feet (2438 mm), the volume shall be calculated on the basis of an 8 foot (2438 mm) height.
The installation clearances shall be in accordance with the appliance listing, shall not be reduced, and shall be installed in accordance with Section 904.1.
Appliances designed to
be fixed in position shall be securely fastened in place in
accordance with the manufacturer's installation instructions.
Supports for appliances shall be designed and constructed to
sustain vertical and horizontal loads within the stress limitations
specified in the building code.
Movement of appliances with casters
shall be limited by a restraining device installed in accordance
with the connector and appliance manufacturer's installation
instructions.
Where more than one
heating, cooling, ventilating, or refrigerating system is
installed on the roof of a building or within a building, it shall
be permanently identified as to the area or space served by
the equipment.
[HCD 1 & HCD 2]Liquefied petroleum gas-burning appliances shall not be installed in a pit, basement, or similar location where heavier-than-air gas might collect. Appliances so fueled shall not be installed in an above-grade under-floor space or basement unless such location is provided with an approved means for removal of unburned gas.
Appliances on roofs shall be
designed or enclosed so as to withstand climatic conditions in
the area in which they are installed. Where enclosures are provided,
each enclosure shall permit easy entry and movement,
shall be of reasonable height, and shall have at least a 30 inch
(762 mm) clearance between the entire service access panel(s) of the appliance and the wall of the enclosure. [NFPA 54:9.4.1.1]
Roofs on which appliances are to be installed shall be capable of supporting the additional load or shall be reinforced to support the additional load. [NFPA 54:9.4.1.2]
Appliances shall be installed on a
well-drained surface of the roof. At least 6 feet (1829 mm) of clearance shall be available between any part of the appliance and the edge of a roof or similar hazard, or rigidly fixed rails, guards, parapets, or other building
structures at least 42 inches (1067 mm) in height shall be provided on the exposed side. [NFPA 54:9.4.2.2]
Where water stands on
the roof at the appliance or in the passageways to the
appliance, or where the roof is of a design having a water
seal, a suitable platform, walkway, or both shall be provided above the waterline. Such platform(s) or walkway(s) shall be located adjacent to the appliance and control panels so that the appliance can be safely serviced
where water stands on the roof. [NFPA 54:9.4.2.4]
Appliances and their vent connectors
shall be installed with clearances from combustible material
so their operation does not create a hazard to persons or property.
Minimum clearances between combustible walls and the
back and sides of various conventional types of appliances
and their vent connectors are specified in Chapter 8 and Chapter
9. [NFPA 54:9.2.2] Where not provided in this code, listed
and unlisted equipment or appliances shall be installed to
maintain the required clearances for servicing and to combustible
construction in accordance with the listing and the manufacturer's installation instructions.
Reduce clearances to combustible construction for listedequipment and appliances shall comply with the listing and Table 303.10.1. Where permitted by the manufacturer, and not provided in this code, reduce clearances to combustible construction for unlisted equipment and appliances shall comply with Table 303.10.1.
TABLE 303.10.1 REDUCTION OF CLEARANCES WITH SPECIFIED FORMS OF PROTECTION1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 [NFPA 54: TABLE 10.2.3]
TYPE OF PROTECTION APPLIED TO AND COVERING ALL SURFACES OF COMBUSTIBLE MATERIAL WITHIN THE DISTANCE SPECIFIED AS THE REQUIRED CLEARANCE WITH NO PROTECTION
WHERE THE REQUIRED CLEARANCE WITH NO PROTECTION FROM APPLIANCE, VENT CONNECTOR, OR SINGLE-WALL METAL PIPE IS:
36 (INCHES)
18 (INCHES)
12 (INCHES)
9 (INCHES)
6 (INCHES)
ALLOWABLE CLEARANCES WITH SPECIFIED PROTECTION (INCHES)
USE COLUMN 1 FOR CLEARANCES ABOVE APPLIANCE OR HORIZONTAL CONNECTOR. USE COLUMN 2 FOR CLEARANCES FROM APPLIANCES, VERTICAL CONNECTOR, AND SINGLE-WALL METAL PIPE.
ABOVE (COLUMN 1)
SIDES AND REAR (COLUMN 2)
ABOVE (COLUMN 1)
SIDES AND REAR (COLUMN 2)
ABOVE (COLUMN 1)
SIDES AND REAR (COLUMN 2)
ABOVE (COLUMN 1)
SIDES AND REAR (COLUMN 2)
ABOVE (COLUMN 1)
SIDES AND REAR (COLUMN 2)
(1) 31/2 inch thick masonry wall without ventilated air space
—
24
—
12
—
9
—
6
—
5
(2) 1/2 of an inch insulation board over 1 inch glass fiber or mineral wool batts
24
18
12
9
9
6
6
5
4
3
(3) 0.024 inch (nominal 24 gauge) sheet metal over 1 inch glass fiber or mineral wool batts reinforced with wire on rear face with ventilated air space
18
12
9
6
6
4
5
3
3
3
(4) 31/2 inch thick masonry wall with ventilated air space
—
12
—
6
—
6
—
6
—
6
(5) 0.024 inch (nominal 24 gauge) sheet metal with ventilated air space
18
12
9
6
6
4
5
3
3
2
(6) 1/2 of an inch thick insulation board with ventilated air space
18
12
9
6
6
4
5
3
3
3
(7) 0.024 inch (nominal 24 gauge) sheet metal with ventilated air space over 0.024 inch (nominal 24 gauge) sheet metal with ventilated air space
18
12
9
6
6
4
5
3
3
3
(8) 1 inch glass fiber or mineral wool batts sandwiched between two sheets 0.024 inch (nominal 24 gauge) sheet metal with ventilated air space
18
12
9
6
6
4
5
3
3
3
For SI units: 1 inch = 25.4 mm, °C = (°F-32)/1.8 Notes:
2 Clearances shall be measured from the outer surface of the combustible material to the nearest point on the surface of the appliance, disregarding an intervening protection applied to the combustible material.
3 Spacers and ties shall be of noncombustible material. No spacer or tie shall be used directly opposite the appliance or connector.
4 Where clearance reduction systems use a ventilated air space, a provision for air circulation shall be provided as described. [See Figure 303.10.1(2) and Figure 303.10.1(3)]
5 There shall be not less than 1 inch (25.4 mm) between clearance reduction systems and combustible walls and ceilings for reduction systems using a ventilated air space.
6 Where a wall protector is mounted on a single flat wall away from corners, it shall have not less than a 1 inch (25.4 mm) air gap. To provide air circulation, the bottom and top edges, or the side and top edges, or edges shall be left open.
7 Mineral wool batts (blanket or board) shall have a density of not less than 8 pounds per cubic foot (lb/ft3) (128 kg/m3) and a minimum melting point of 1500°F (816°C).
8 Insulation material used as part of a clearance reduction system shall have a thermal conductivity of 1 British thermal unit inch per hour square foot degree Fahrenheit [Btu•in/(h•ft2•°F)] [0.1W/(m•K)] or less.
9 There shall be not less than 1 inch (25.4 mm) between the appliance and the protector. In no case shall the clearance between the appliance and the combustible surface be reduced below that allowed in this table.
10 Clearances and thicknesses are minimum; larger clearances and thicknesses are acceptable.
11Listed single-wall connectors shall be installed in accordance with the terms of their listing and the manufacturer's installation instructions.
Notes:
1 A — Equals the clearance with no protection specified in Table 802.7.3.3 and Table 904.2.2 and in the sections applying to various types of appliances.
2 B — Equals the reduced clearance permitted in accordance with Table 303.10.1.
3 The protection applied to the construction using combustible material shall extend far enough in each direction to make C equal to A.
FIGURE 303.10.1(1)1, 2, 3 EXTENT OF PROTECTION NECESSARY TO REDUCE CLEARANCES FROM GAS APPLIANCES OR VENT CONNECTORS [NFPA 54: FIGURE 10.3.2.3(a)]
For SI units: 1 inch = 25.4 mm
Note: Masonry walls shall be permitted to be attached to combustible walls using wall ties. Spacers shall not be used directly behind appliance or connector.
Reduce clearances for Type I exhaust systems shall
be in accordance with Section 507.4.2 through Section
507.4.2.3. Clearances from the duct or the
exhaust fan to the interior surface of enclosures of
combustible construction shall be in accordance
with Section 510.7.3 and clearances shall not be
reduced.
For solid-fuel burning appliances, the clearance, after reduction, shall not be less than 12 inches (305
mm) to combustible walls and not less than 18
inches (457 mm) to combustible ceilings. The clearance,
after reduction, shall be permitted to be less
than 12 inches (305 mm) to combustible walls and
less than 18 inches (457 mm) to combustible ceilings
where the solid-fuel burning appliances is listed
for lesser clearance.
Where excavation is necessary to install
an appliance, it shall extend to a depth of 6 inches (152 mm)
below and 12 inches (305 mm) on all sides of the appliance,
except on the service side, which shall have 30 inches (762
mm). Where the depth of the excavation for either the appliance
or passageway exceeds 12 inches (305 mm), walls shall be
lined with concrete or masonry 4 inches (102 mm) above the
adjoining ground level.
Appliances shall be located with respect to
building construction and other equipment so as to permit
access to the appliance. Sufficient clearance shall be maintained
to permit cleaning of heating surfaces; the replacement
of filters, blowers, motors, burners, controls, and vent connections;
the lubrication of moving parts where necessary;
the adjustment and cleaning of burners and pilots; and the
proper functioning of explosion vents, where provided. For
attic installation, the passageway and servicing area adjacent
to the appliance shall be floored. [NFPA 54:9.2.1]
Unless otherwise specified, not less than 30 inches (762 mm) in depth, width, and height of working space shall be
provided.
Where equipment or appliances that
require service are installed on a roof having a slope of 4 units
vertical in 12 units horizontal (33 percent slope) or more, a
level platform of not less than 30 inches by 30 inches (762 mm by 762 mm) shall be provided at the service side of the
equipment or appliance.
Buildings exceeding 15 feet (4572 mm) in height shall have an inside means of access to
the roof unless other means acceptable to the Authority
Having Jurisdiction are used. [NFPA 54:9.4.3.2]
The inside means of
access shall be a permanent, or foldaway inside
stairway or ladder, terminating in an enclosure, scuttle,
or trap door. Such scuttles or trap doors shall be
not less than 22 inches by 24 inches (559 mm by 610
mm) in size, shall open easily and safely under all
conditions, especially snow; and shall be constructed
so as to permit access from the roof side unless
deliberately locked on the inside.
Not less than 6 feet (1829 mm) of clearance
shall be between the access opening and the edge of
the roof or similar hazard or rigidly fixed rails or
guards not less than 42 inches (1067 mm) in height
shall be provided on the exposed side. Where parapets
or other building structures are utilized in lieu of
guards or rails, they shall be not less than 42 inches
(1067 mm) in height. [NFPA 54:9.4.3.3]
Permanent lighting
shall be provided at the roof access. The switch for such
lighting shall be located inside the building near the
access means leading to the roof. [NFPA 54:9.4.3.4]
An attic or under-floor space in which an appliance is
installed shall be accessible through an opening and passageway
not less than the largest component of the appliance, and
not less than 22 inches by 30 inches (559 mm by 762 mm).
Where the height of
the passageway is less than 6 feet (1829 mm), the distance
from the passageway access to the appliance shall
not exceed 20 feet (6096 mm) measured along the centerline
of the passageway. [NFPA 54:9.5.1.1]
The passageway shall
be unobstructed and shall have solid flooring not less
than 24 inches (610 mm) wide from the entrance opening
to the appliance. [NFPA 54:9.5.1.2]
A level working platform not
less than 30 inches by 30 inches (762 mm by 762 mm)
shall be provided in front of the service side of the appliance. [NFPA 54:9.5.2]
Exception: A working platform need not be provided
where the furnace is capable of being serviced from the
required access opening. The furnace service side shall not
exceed 12 inches (305 mm) from the access opening.
A permanent
120V receptacle outlet and a lighting fixture shall
be installed near the appliance. The switch controlling the
lighting fixture shall be located at the entrance to the passageway. [NFPA 54:9.5.3]
Appliances in residential
garages and in adjacent spaces that open to the garage and are
not part of the living space of a dwelling unit shall be installed so that all burners and burner-ignition devices are located not
less than 18 inches (457 mm) above the floor unless listed as
flammable vapor ignition resistant. [NFPA 54:9.1.10.1]
Appliances installed in
garages, warehouses, or other areas subject to mechanical
damage shall be guarded against such damage by being
installed behind protective barriers or by being elevated or
located out of the normal path of vehicles.
Where appliances are installed in a separate, enclosed space having access
only from outside of the garage, such appliances shall be permitted to be installed at floor level, providing the required combustion air is taken from the exterior of the garage. [NFPA 54:9.1.10.3]
For buildings located in flood
hazard areas, heating, ventilating, air-conditioning, refrigeration,
miscellaneous heat-producing, and energy-utilizing equipment
and appliances shall be elevated at or above the elevation
in accordance with the building code for utilities and attendant
equipment or the elevation of the lowest floor, whichever is higher.
Exception: Equipment and appliances shall be permitted to be
located below the elevation in accordance with the building
code for utilities and attendant equipment or the elevation of the
lowest floor, whichever is higher, provided that the systems are
designed and installed to prevent water from entering or accumulating
within their components and the systems are constructed
to resist hydrostatic and hydrodynamic loads and
stresses, including the effects of buoyancy, during the occurrence
of flooding to such elevation.
Mechanical systems
in buildings located in coastal high hazard areas shall
be in accordance with the requirements of Section 305.2,
and mechanical systems, pipes, and appurtenances shall not
be mounted on or penetrate through walls that are intended
to breakaway under flood loads in accordance with the
building code.
Outside
air exhaust openings and air intake openings shall be located at or above the elevation required by the building
code for utilities and attendant equipment or the elevation
of the lowest floor, whichever is higher.
Where a water heater is located in an
attic, in or on an attic ceiling assembly, floor-ceiling assembly,
or floor-subfloor assembly where damage results from a leaking
water heater, a watertight pan of corrosion-resistant materials
shall be installed beneath the water heater with not less
than 3/4 of an inch (20 mm) diameter drain to an approved location.
Such pan shall be not less than 11/2 inches (38 mm) in
depth.
Heating appliances shall be equipped with a
listed device or devices that will shut off the fuel supply to the
main burner or burners in the event of pilot or ignition failure.
Liquefied petroleum gas-air-burning heating appliances shall
be equipped with a listedautomatic device or devices that will
shut off the flow of gas to the pilot in the event of ignition failure.
Heating appliances whose manual fuel controls are not
readily accessible from the main portion of the building being
heated shall be equipped with remote controls.
Forced-air and gravity-type warm air furnaces shall be
equipped with a listed air outlet temperature limit control that
cannot be set for temperatures exceeding 250°F (121 °C). Such
controls shall be located in the bonnet or plenum, within 2 feet
(610 mm) of the discharge side of the heating element of gravity
furnaces or in accordance with the conditions of listing.
Electric duct heaters shall be equipped with an approvedautomatic reset air outlet temperature limit control that will
limit the outlet air temperature to not exceed 200°F (93°C).
The electric elements of the heater shall be equipped with
fusible links or a manual reset temperature limit control that
will prevent outlet air temperature in excess of 250°F (121 °C).
[OSHPD 1] Building automation systems shall provide for localized control in the event of network failure. This capability shall be
specified in the construction documentation.
Required clearances from combustible surfaces on which
or adjacent to which it is permitted to be mounted.
An appliance shall be accompanied by clear and complete
installation instructions, including required clearances
from combustibles other than mounting or adjacent surfaces,
and temperature rating of field-installed wiring connections
exceeding 140°F (60°C).
Required clearances from combustible surfaces on which
or adjacent to which it is permitted to be mounted.
An appliance shall be accompanied by clear and complete
installation instructions, including required clearances
from combustible other than mounting or adjacent surfaces,
and temperature rating of field-installed wiring connections
exceeding 140°F (60°C).
Piping or equipment shall not be so located as
to interfere with the normal use thereof or with the normal operation
and use of windows, doors, or other required facilities.
Design, construction, and
workmanship shall comply with accepted engineering practices
and shall be of such character as to secure the results
sought to be obtained by this code.
It shall be unlawful to
conceal cracks, holes, or other imperfections in materials by
welding, brazing, or soldering, by using therein or thereon paint,
wax, tar, solvent cement, other leak-sealing or repair agent.
Mechanical systems shall
be installed in a manner that is in accordance with this code,
applicable standards, and the manufacturer's installation
instructions.
Condensate from air washers,
air-cooling coils, condensing appliances, and the overflow
from evaporative coolers and similar water-supplied
equipment or similar air-conditioning equipment shall be collected
and discharged to an approved plumbing fixture or disposal
area. Where discharged into the drainage system,
equipment shall drain by means of an indirect waste pipe. The
waste pipe shall have a slope of not less than 1/8 inch per foot
(10.4 mm/m) or 1 percent slope and shall be of approved corrosion-resistant material not smaller than the outlet size in
accordance with Section 310.3 or Section 310.4 for air-cooling
coils or condensing appliances, respectively. Condensate
or wastewater shall not drain over a public way.
Where approved by the
Authority Having Jurisdiction, condensate pumps shall
be installed in accordance with the manufacturer's installation
instructions. Pump discharge shall rise vertically to
a point where it is possible to connect to a gravity condensate
drain and discharged to an approved disposal
point. Each condensing unit shall be provided with a separate
sump and interlocked with the equipment to prevent
the equipment from operating during a failure.
Separate pumps shall be permitted to connect to a single
gravity indirect waste where equipped with check valves
and approved by the Authority Having Jurisdiction.
Where an equipment or appliance
is installed in a space where damage is capable of resulting
from condensate overflow, other than damage to replaceable
lay-in ceiling tiles, a drain line shall be provided and shall be
drained in accordance with Section 310.1. An additional protection
method for condensate overflow shall be provided in
accordance with one of the following:
A water level detecting device that will shut off the equipment
or appliance in the event the primary drain is
blocked.
An additional watertight pan of corrosion-resistant material,
with a separate drain line, installed beneath the cooling
coil, unit, or the appliance to catch the overflow
condensate due to a clogged primary condensate drain.
An additional drain line at a level that is higher than the
primary drain line connection of the drain pan.
An additional watertight pan of corrosion-resistant material
with a water level detection device installed beneath
the cooling coil, unit, or the appliance to catch the overflow
condensate due to a clogged primary condensate
drain and to shut off the equipment.
The additional pan or the additional drain line connection
shall be provided with a drain pipe of not less than
3/4 of an inch (20 mm) nominal pipe size, discharging at a
point that is readily observed.
Where insulation
or appurtenances are installed where damage is
capable of resulting from a condensate drain pan overfill,
such installations shall occur above the rim of the drain
pan with supports. Where the supports are in contact with
the condensate waste, the supports shall be of approved
corrosion-resistant material.
Condensate waste pipes from air-cooling coils shall be sized in accordance with the equipment capacity as specified in Table 310.3. The material of the piping shall comply with the pressure and temperature rating of the appliance or equipment, and shall be approved for use with the liquid being discharged.
For SI units: 1 ton of refrigeration = 3.52 kW, 1 inch = 25 mm
The size of condensate waste pipes is for one unit or a combination of units, or as recommended by the manufacturer. The capacity of waste pipes assumes a 1/8 inch per foot (10.4 mm/m) or 1 percent slope, with the pipe running three-quarters full at the following pipe conditions:
Condensate drain lines shall be
configured or provided with a cleanout to permit the
clearing of blockages and for maintenance without
requiring the drain line to be cut.
Air-conditioning condensate
waste pipes shall connect indirectly, except where permitted
in Section 310.6, to the drainage system through an air gap or
air break to trapped and vented receptors, dry wells, leach
pits, or the tailpiece of plumbing fixtures. A condensate drain
shall be trapped in accordance with the appliance manufacturer's
instructions or as approved.
Where the condensate waste from air-conditioning
coils discharges by direct connection to a lavatory tailpiece or
to an approved accessible inlet on a bathtub overflow, the connection
shall be located in the area controlled by the same
person controlling the air-conditioned space.
A heating or cooling air system shall be provided
with return air, outside air, or both. A heating or cooling
air system regulated by this code and designed to replace
required ventilation shall be arranged to discharge into a conditioned
space not less than the amount of outside air specified
in Chapter 4.
Air filters shall be installed in a heating,
cooling, or makeup air system. Media-type air filters shall
comply with UL 900. Electrostatic and high efficiency particulate
filters shall comply with Section 936.0.
Exceptions:
Systems serving single guest rooms or dwelling units
shall not require a listed filter.
Air filters used in listedappliances and in accordance
with the manufacturer's instructions.
[HCD 1 & HCD 2] In mechanically ventilated residential
buildings, air filters shall be provided to clean outdoor and
return air prior to its delivery to occupied spaces. The air filters
shall comply with the California Energy Code requirements
for labeling, ventilation system design and installation,
air filter efficiency, and air filter pressure drop, as applicable. See California Energy Code Subchapters 3, 6, 7, and 9 for
requirements related to air filtration for residential occupancies.
Outside or return air for a heating
or cooling air system shall not be taken from the following locations:
Less than 10 feet (3048 mm) in distance from an appliance
vent outlet, a vent opening of a plumbing drainage system,
or the discharge outlet of an exhaust fan, unless the outlet
is 3 feet (914 mm) above the outside-air inlet.
Less than 10 feet (3048 mm) above the surface of an abutting
public way, sidewalk, street, alley, or driveway.
An area, the volume of which is less than 25 percent of the
entire volume served by such system, unless there is a permanent
opening to an area the volume of which is equal to
25 percent of the entire volume served.
Exception: Such openings where used for a heating or
cooling air system in a dwelling unit shall be permitted to
be reduced to not less than 50 percent of the required area,
provided the balance of the required return air is taken from
a room or hall having not less than three doors leading to
other rooms served by the furnace.
This shall not apply to a gravity-type or listed vented
wall heating or cooling air system.
This shall not apply to a blower-type heating or cooling
air system installed in accordance with the following
requirements:
Where the return air is taken from a room or space
having a volume exceeding 1 cubic foot (0.03 m3)
for each 10 Btu/h (0.003 kW) fuel input rating of
fuel-burning appliances therein.
Not less than 75 percent of the supply air is discharged
back into the same room or space.
Return-air inlets shall not be located within 10
feet (3048 mm) from an appliance firebox or draft
diverter in the same enclosed room or confined
space.
Hangers and anchors shall be of sufficient
strength to support the weight of the pipe or tubing and its
contents. Piping or tubing shall be isolated from incompatible
materials.
1 inch and smaller, 32 inches; 11/4 inches and larger, 4 feet
Base and each floor; provide mid-story guides
For SI unit: 1 inch = 25.4 mm, 1 foot = 304.8 mm
Notes:
1 Support adjacent to joint, not to exceed 18 inches (457 min).
2 Brace not to exceed 40 feet (12 192 mm) intervals to prevent horizontal movement.
3 Support at each horizontal branch connection.
4 Hangers shall not be placed on the coupling.
5 Vertical water lines shall be permitted to be supported in accordance with recognized engineering principles with regard to expansion and contraction, where first approved by the Authority Having Jurisdiction.
Piping or tubing in the
ground shall be laid on a firm bed for its entire length; where
other support is otherwise provided, it shall be approved in
accordance with Section 302.0.
Louvers located in areas within hurricane-prone
regions that are within 1 mile (2 km) of the coastal mean
high water line where the basic wind speed is 110 miles per
hour (mi/h) (49.2 m/s) or more; or portions of hurricane-prone
regions where the basic wind speed is 120 mi/h (53.6 m/s) or
more; or Hawaii, as described in ASCE 7 shall be tested in
accordance with Section 315.1.1 and Section 315.1.2.
Upon request by the
Authority Having Jurisdiction, louvers protecting intake
and exhaust ventilation ducts that are not fixed in the
open position and located within 30 feet (9144 mm) of
the grade shall be tested for impact resistance in accordance
with AMCA 540.
Piping or tubing passing under or through
walls shall be protected from breakage. Piping passing
through or under cinders or other corrosive materials shall be
protected from external corrosion in an approved manner.
Approved provisions shall be made for expansion of hot
water piping. Voids around piping or tubing passing through
concrete floors on the ground shall be sealed.
Piping or tubing shall be installed so that
the piping, tubing, or connections will not be subject to undue
strains or stresses, and provisions shall be made for expansion,
contraction, and structural settlement. No piping or tubing,
unless designed and listed for such use, shall be directly
embedded in concrete or masonry. No structural member shall
be seriously weakened or impaired by cutting, notching, or otherwise as defined in the California Building Code or California Residential Code.
Protectively coated pipe
or tubing shall be inspected and tested, and a visible void, damage, or imperfection to the pipe coating shall be repaired in an approved manner.
Plastic piping or tubing, copper
or copper alloypiping or tubing, and ducts penetrating framing
members to within 1 inch (25.4 mm) of the exposed framing
shall be protected by steel nail plates not less than No. 18
gauge (0.0478 inches) (1.2141 mm) in thickness. The steel
nail plate shall extend along the framing member not less than
11/2 inches (38 mm) beyond the outside diameter of the pipe or tubing.
In exterior walls, annular space
between sleeves and pipes or tubing shall be sealed and
made watertight, as approved by the Authority Having
Jurisdiction. A penetration through fire-resistive construction shall be in accordance with Section 316.5.
A pipe sleeve through a firewall shall have
the space around the pipe or tubing completely sealed with an approved fire-resistive material in accordance with other
codes.
A structural member weakened
or impaired by cutting, notching, or otherwise shall be reinforced, repaired, or replaced so as to be left in a safe structural
condition in accordance with the requirements of the
California Building Code or California Residential Code.
Mechanical system shall be constructed
in such a manner as to restrict rodents or vermin from
entering a building by following the ductwork from the outside into the building.
In or on buildings where openings
have been made in walls, floors, or ceilings for the passage of
ductwork or pipes, such openings shall be closed and protected
by the installation of approved metal collars securely
fastened to the adjoining structure.
Trenches deeper than the footings of a
building or structure, and paralleling the same, shall be
located not less than 45 degrees (0.79 rad) from the bottom
exterior edge of the footing, or as approved in accordance
with Section 302.0.
Tunneling and driving shall
be permitted to be done in yards, courts, or driveways of a
building site. Where sufficient depth is available to permit,
tunnels shall be permitted to be used between open-cut
trenches. Tunnels shall have a clear height of 2 feet (610 mm)
above the pipe and shall be limited in length to one-half the
depth of the trench, with a maximum length of 8 feet (2438
mm). Where pipes are driven, the drive pipe shall be not less
than one size larger than the pipe to be laid.
Excavations required to be made for
the installation of a mechanical system or part thereof, within
the walls of a building, shall be open trench work and shall be
kept open until it has been inspected, tested, and accepted.
Excavations shall be completely backfilled
as soon after inspection as practicable. Precaution shall
be taken to ensure compactness of backfill around piping
without damage to such piping. Trenches shall be back-filled
in thin layers to 12 inches (305 mm) above the top of the piping
with clean earth, which shall not contain stones, boulders,
cinderfill, frozen earth, construction debris, or other materials
that will damage or break the piping or cause corrosive
action. Mechanical devices such as bulldozers, graders, etc.,
shall be permitted to then be used to complete backfill to grade. Fill shall be properly compacted. Precautions shall be
taken to ensure permanent stability for pipe laid in filled or
made ground.
Boilers shall have the capacity, based upon the
rest ratings published by the Hydronics Institute or
another acceptable national standard to supply the normal
operating requirements of all connected systems and
equipment.
A minimum of two boilers shall be provided. The
arrangement of boilers shall be based on the capacity
and capability of a boiler or boilers to operate all systems
during-periods of breakdown or maintenance of any
one boiler.
Boiler systems providing space heating shall be
designed to maintain a minimum temperature of 60°F
(15.6°C) in general patient areas and the temperatures
specified in Table 4-A for sensitive areas during periods
of breakdown or maintenance of any one boiler.
Boiler feed pumps, condensate return pumps,
fuel oil pumps, and heating circulating pumps shall be
connected and installed to provide standby service in the
event of pump failure. Installation of duplex pumps or
provision of a spare pump will meet this requirement.
At least two sources of heat (e.g. two pieces of
equipment) shall be provided for supplying essential
services such as sterilizers, hot water for dishwashing,
and domestic hot water for minimum patient service,
such as handwashing and baths. Booster heaters for
dishwashing providing 125°F to 180°F (52°C to 82°C)
water may be counted as the second source of heat for
that service.
The systems shall be designed to provide the temperatures and relative humidity for sensitive areas or rooms shown in Table 4-A. When outdoor humidity and internal moisture sources are not sufficient to meet the requirements of sensitive areas or rooms in Table 4-A, humidification shall be provided by means of the healthcare facility air-handling systems. Temperature shall be individually controlled for each operating and delivery room. Burn unit patient rooms that require humidifiers to comply with the requirements of sensitive areas or rooms in Table 4-A shall be provided with individual humidity control. All humidifiers shall use dry steam. Humidifiers shall be located within air handling systems or ductwork to avoid moisture accumulation in downstream components, including filters and insulation.
Heating systems shall be designed based on the
"Heating DB 99.6%" column of the Climatic Design
Data in ASHRAE Handbook-Fundamentals. The systems
shall be thermostatically controlled with appropriate
zoning to achieve the above conditions.
Cooling systems shall be designed based on the
0.4% columns of the four Annual Design Conditions
titled Cooling, Evaporation, Dehumidification, and
Enthalpy shown by the Climate Design Data in ASHRAE
Handbook-Fundamentals. The systems shall be thermostatically controlled with appropriate zoning to achieve the above conditions.
[OSHPD 1 & 4] Where telecommunications service entrance
rooms, technology equipment centers, or technology distribution
rooms are provided in accordance with Section 1224.5
of the California Building Code, the following requirements shall apply:
Power for HVAC systems serving the room(s)
shall be supplied by the Equipment Branch pursuant to
the California Electrical Code. Where redundant systems
are provided, only one shall be required to be supplied by
the Equipment Branch.
HVAC systems shall be provided to maintain
environmental conditions recommended in ASHRAE's
Thermal Guidelines for Data Processing Environment
and the requirements of the specific equipment installed.
Technology equipment centers shall have redundant cooling systems each of sufficient capacity to provide required cooling during periods of breakdown or
maintenance of either system. One system shall be nonhydronic and on essential power.
[OSHPD 1, 1R, 2, 4 & 5]
For projects associated with provision of psychiatric services
in acute psychiatric hospitals, general acute-care hospitals,
and special treatment program service units in skilled nursing
facilities, psychiatric, seclusion, and holding-patient
rooms shall be designed with security diffusers, grilles, and registers.
[OSHPD 1, 1R, 2, 3 (Surgical Clinics only) 4 & 5] During periods of
power outages essential electrical power shall be provided
for the following equipment:
(Does not apply to OSHPD 3 surgical clinic.) All heating equipment and fans necessary to maintain a minimum temperature of 60°F (15.6°) in patient areas which are not specified in Section 322.0.
The following conditions shall be met for sensitive areas or rooms:
Thermostats and humidistats shall be either locally resettable and of the non-locking type or remotely resettable and of the locking type.
Systems shall be capable of maintaining the rooms within the temperature range in Table 4-A during normal operation. Lower or higher temperature shall be permitted when patients' comfort and/or medical conditions require those conditions.
The humidity ranges listed in Table 4-A are the minimum and maximum limits where control is specifically needed.
[OSHPD 1, 1R, 2, 4 & 5] Mechanical equipment schedules in the construction documents shall clearly indicate which equipment
will be powered by essential power or appropriate special
seismic certifications.
