HomeMy WebLinkAboutGeneral Mechanical System RequirementssEcrloN Ml301
GENERAL
M130L.L Scope. The provisions of this chapter shall govern
the installation of mechanical systems not specifically cov-
ered in other chapters applicable to mechanical systems'
Installations of mechanical appliances, equipment and sys-
tems not addressed by this code shall comply with the appli-
cable provisions of the Internøtional Mechanical Code and
the Internølional Fuel Gas Code.
M1301.1.1 Flood-resistant installation. In flood hazard
areas as established by Table R301.2(1), mechanical
appliances, equipment and systems shall be located or
installed in accordance with Section R322.L'6.
M1301.2 Identification. Each length of pipe and tubing and
each pipe fitting utilized in a mechanical system shall bear
the identification of the manufacturer.
M1301.3 Installation of materials. Materials shall be
installed in strict accordance with the standards under which
the materials are accepted and approved. In the absence of
such installation procedures, the manufacturer' s instructions
shall be followed. Where the requirements of referenced stan-
dards or manufacturer's instructions do not conform to mini-
mum provisions of this code, the provisions of this code shall
apply.
M1301.4 Plastic pipe, fÏttings and components. Plastic
pipe, fittings and components shall be third-party certified as
conforming to NSF 14.
M1301,.5 Third-party testing and certifÏcation. Piping, tub-
ing and fittings shall comply with the applicable referenced
standards, specifications and performance criteria ofthis code
and shall be identified in accordance with Section l.v41301'2.
Piping, tubing and fittings shall either be tested by an
approved third-party testing agency or certified by an
approved third-party certification agency.
SECT¡ON M1302
APPROVAL
M1302.1 Listed and labeled. Appliances regulated by this i
code shall be listed and labeled for the application in which ,
they are installed and used, unless otherwise approved in ,
accordance with Section R104'11.
SECTION Ml303
LABEL¡NG OF APPLIANCES
M1303.1 Label information. A permanent factory-applied
nameplate(s) shall be affixed to appliances on which shall
appear, in legible lettering, the manufacturer's name or trade-
m-t, ttre model number, a serial number and the seal ot mark
a#aúel þ
Q/1/Þ/77a lS#zcg
of the testing agency. A label also shall include the follow-
ing:
1. Electrical appliances. Electrical rating in volts,
amperes and motor phase; identification of individual
electrical components in volts, amperes or watts and
motor phase; and in Btu/h (W) output and required
clearances.
2. Absorption units. Hourly rating in Btu/h (W), minimum
hourly rating for units having step or automatic modu-
lating controls, type offuel, type ofrefrigerant, cooling
capacity in Btu/h (V/) and required clearances.
3. Fuel-burning units. Hourly rating in Btu/h (W), type of
fael approved for use with the appliance and required
clearances.
4. Electric comfort-heating appliances. The electric rating
in volts, amperes and phase; Btu/h (V/) output rating;
individual marking for each electrical component in
amperes or watts, volts and phase; and required clear-
ances from combustibles.
5. Maintenance instructions. Required regular mainte-
nance actions and title or publication number for the
operation and maintenance manual for that particular
model and type of product.
SECTION Ml304
TYPE OF FUEL
M1304.1 Fuel types. Fuel-fired appliances shall be designed
for use with the type of fuel to which they will be connected
and the altitude at which they are installed. Appliances thar
comprise parts of the building mechanical system shall not be
converted for the use of a different fuel, except where
approved and converted in accordance with the manufac-
turer's instructions. The fuel input rate shall not be increased
or decreased beyond the limit rating for the altitude at which
the øppliance is installed.
sEcTloN Ml305
APPLIANCE ACCESS
M1.305.1 Apptiance access for inspection serYice' repair
and replacement. Appliances sltall be accessible for inspec-
tion, service, repair and replacement without removing per-
manent construction, other appliances, ot any other piping or
ducts not connected Ío the appliønce being inspected' ser-
viced, repaired or replaced. A level working space not less
than 3plnches deep and 30 inches wide (762 mm by 762mm)
"!ffi:rO;.*vided in front of the control side to service an
I
CHAPTER 13
GEÑERAL MECHANICAL SYSTEM REQUIREMENTS
2015 INTERNATIONAL RESIDENTIAL CODE@ 473
GENERAL MECHANICAL SYSTEM REQUIREMENTS
Ml305.1.1 Furnaces and air handlers. Furnaces and air,
handlers within compartments ol alcovcs shall have a min-
imum working space clearance of 3 inchcs (76 mm) along
the sides, back and top rvith u Lol.ul width of thc cnclosing
space being not less than l2 inches (305 mm) wider than the
f'urnace or air handler. Furnaces having a firebox open to
the atmosphere shall have not less than a 6-inch (i52 mm)
working space along the front combustion chamber side.
Combustion air openings at the rear or side of the compart-
ment shall comply with the requirements of Chapter 17,
Exception: This section shall not apply to replacement
applianccs installed in existing compartments and
aicoves where the worHng space clearances are in
accordance with the equipment or appliance manufac-
turer's installation instructions.
M1305.1.2 Appliances ln rooms. Appliances installed in
a compartment, aicove, basement or similar space shall be
accessed by an opening or door and an unobstructed pas-
sageway measuring not less than}4 inches (610 mm) wide
and large enough to allow removal ofthe largest appliance
in the space, provided there is a level service space of not
less than 30 inches (762 mm) deep and rhe height of the
applíance, but not less than 30 inches (762 mm), at the
front or service side of the appliance with the door open.
M1305.1.3 Appliances in attics. Attics containing appli-
ances shall be provided with an opening and a clear ancl
unobstructed passageway large enough to allow removal
of the largest. appliance, but not less than 30 inches (762
mm) high and22 inches (559 mm) wide and not more than
20 feet (6096 mm) long measured along the centerlinc of
the passageway [i'om il^re opening Lo the appiiance. The
passageway shall have continuous soiid flooring in accor-
dance with Chapter 5 not less than 24 inches (610 mm)
wide. A level service space not less than 30 inches (762
mm) deep and 30 inches (762 mm) wide shall be presenr
along all sides of the appliance where access is required.
The clear access opening dimensions shall be not less than
of 20 inches hy 30 inches (508 mm by 762 mm), and large
enough to allow removal of the largest appliance.
Exceptions:
1. The passageway and level service space are not
required where the appliance can be serviced and
removed through the required opening.
2. Where the passageway is unobstructed and not
less than 6 feet(1829 mm) high and 22 inches (559
mm) wide for its entire length, the passageway
shall be not more than 50 feet (15 250 mm) long.
M1305.1.3.1 Electrical requirements. A luminaire
controlled by a switch located at the requircd passage-
way opening and a receptacle outlet shall be installed at
or near thc applianc¿ location in accordance with
Chapter 39. Exposed lamps shall be protected from
damage by location or lamp guards.
M1305.1.4 Appliances under floors. I-Inderfloor spaces
containing appliances shall be provided with an unob-
structcd pâssageway luge enough to lelnove the largest"
appliance, but not less than 30 inches (762 mm) high and
22 inches (559 mm) wide. nor more ûtan 20 feet (6096
mm) long measured along the centerline of the passage-
way frorr the openiug Lrl. Llrc uppliuru:e. A level service
space rot less than 30 inclies (762 ninÐ deep ald 30 iuches
(762 rnln) widc shall bc prcscnt at thc frout or sslvice side
otthe appliance. Ifthe depth ofthe passageway or the ser-
vice space exceeds 12 inches (305 mm) below the adjoin-
ing grade. the walls of the passageway shall be lined with
concrete or masonry extending 4 inchcs (102 mm) above
the adioining grade in accordance with Chapter 4. The
rough-tiamed access opening dimensions shall be not less
than'22 inches by 30 inches (559 mm by 762 mm), and
large enough to remove the largest a¡t¡tliance.
Exceptions:
1. The passageway is not required where the level
service space is present when rhe access is open,
qnrl fhc nnnlinmna nen he cprrrino.l onrl .--^"-n
through the required opening.
2. Where the passageway is unobstructed and not
less than 6 feet high (1929 mm) and 22 inches
(559 mm) wide for its entire length, the passage-
way shall not be limited in length.
M1305.1.4.1 Ground clearance. Equipment and appli-
ances strpported from the ground shall be level and
firmly supported on a concrete slab or other approvcd
-.f-";.I a.ta-Ài-^ nnt l¿¡¡ ft-^- 2 i^^L^^ /11 ^^\!^tvtlul¡16 rtvr ruúo Lr¡4rt J rr¡lrruò \ I w ttutt)
above the adjoining ground. Such support shall be in
accordance with the manufacturer's installation instruc-
tions. Appliancøs suspended from the floor shall have a
clearance of not less than 6 inches (152 mm) from the
ground.
M1305.1.4.2 Excavations. Excavations for appliance
installations shall extend to a depth of 6 inches (152
mm) below rhe appliance and 12 inches (305 mm) on
all sides, except that the control side shall have a clear-
ance of 30 inches (762 mm).
M1305.1.4.3 Electrical nequirements. A luminaire
controlied by a switch located at the required passage-
way opening and a receptacle outlet shall be installed at
or near the appliance location in accordance with
Chapter 39. Exposed lamps shali be protected from
damage by location or lamp guards.
sEcTtoN M1306
CLEARANCES FROM COMBUSTIBLE
COh¡STRUCT¡ON
M1306.1 Appliancc clcarancc. Appliances shall be installed
with the clearançes from unprotected combustiblc materials
as indicated on the appliance label and in thc manufacturer's
installation instructions.
M1306.2 Clearance reductíon. The reduction of required
clearançes to cor¡rrbustible assemblies or combustible materi-
als shall be based on Section M1306.2.1 or Section
Ml306.?,7..
M1306.2.1 Labeled assemblies. The allowable clearance
shall bc bascc! on an approved reduced clealance protec-
201 5 ¡NTERNATIONAL RESIDENTIAL CODE@