LAARS Heating Systems
Page 10
U.S. Installations (see note 1)
Canadian Installations (see note 2)
A=
Clearance above grade, veranda, porch,
12 inches (30 cm)
12 inches (30 cm)
deck, or balcony
B=
Clearance to window or door that may be 4 feet (1.2 m) below or to side of opening;
36 inches (91 cm)
opened
1 foot (30 cm) above opening
C=
Clearance to permanently closed window
See note 4
See note 5
D=
Vertical clearance to ventilated soffit located
above the terminal within a horizontal
See note 4
See note 5
distance of 2 feet (61cm) from the center
line of the terminal
E=
Clearance to unventilated soffit
See note 4
See note 5
F=
Clearance to outside corner
See note 4
See note 5
G=
Clearance to inside corner
See note 4
See note 5
H=
Clearance to each side of center line
3 feet (91 cm) within a height 15 feet above
extended above meter/regulator assembly See note 4
the meter/regulator assembly
I=
Clearance to service regulator vent outlet
See note 4
3 feet (91 cm)
J=
Clearance to nonmechanical air supply inlet
to building or the combustion air inlet to
4 feet (1.2 m) below or to side of opening;
36 inches (91 cm)
any other appliance
1 foot (30 cm) above opening
K=
Clearance to a mechanical air supply inlet 3 feet (91 cm) above if within 10 feet (3 m)
6 feet (1.83 m)
horizontally
Vent termination not allowed in this location
Vent termination not allowed in this location for category IV appliances. A vent shall not
L=
Clearance above paved sidewalk or paved for category IV appliances. For Category III terminate directly above a sidewalk or paved
driveway located on public property
appliances, vent must terminate at least 7
driveway that is located between two single
feet (2.13m) above the sidewalk or driveway. family dwellings and serves both dwellings.
For Category III appliances that do not violate
the previous condition, vent must terminate
at least 7 feet (2.13m) above the sidewalk or
driveway.
M=
Clearance under veranda, porch, deck,
See note 4
12 inches (30 cm) (see note 3)
or balcony
Notes:
1. In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code.
2. In accordance with the current CSA-B149.1 Installation Codes.
3. Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
4. For clearances not specified in ANSI Z223.1 / NFPA 54, clearance is in accordance with local installation codes and the requirements of
the gas supplier.
5. For clearances not specified in CSA-B149.1, clearance is in accordance with local installation codes and the requirements of the gas supplier.
Figure 4. Combustion Air and Vent Through Side Wall.
Содержание MIGHTY THERM2
Страница 23: ...Mighty Therm2 Page 23 Figure 19 Mighty Therm2 500 750 Connection Diagram...
Страница 24: ...LAARS Heating Systems Page 24 Figure 20 Mighty Therm2 1000 Connection Diagram...
Страница 37: ...Mighty Therm2 Page 37 Figure 23 Sheet Metal Components 12A 12B 12C...
Страница 38: ...LAARS Heating Systems Page 38 Figure 24 Internal Components...