Martin MDV12N, Operation Manual, Page: 11 / 19

N O N O
N O N O
n it n o c n it n o c
n it n o c n it n o ccontin
.. . d e u .. . d e u
.. . d e u .. . d e uued...
Clearance above grade, veranda, porch,
deck, or balcony
Clearance to window or door that may be
opened
Clearance to permanently closed window
Vertical clearance to ventilated soffit lo-
cated above the terminal within a horizon-
tal distance of 2 feet (61 cm) from the cen-
ter line of the terminal
Clearance to unventilated soffit
Clearance to outside corner
Clearance to inside corner
Clearance to each side of center line ex-
tended above meter/regulator assembly
Clearance to service regulator vent outlet
Clearance to nonmechanical air supply in-
let to building or the combustion air inlet to
any other appliance
Clearance to a mechanical air supply inlet
Clearance above paved sidewalk or paved
driveway located on publis property
Clearance under veranda, porch, deck, or
balcony
= A
= B
= C
= D =
= E = E
= F = F
= G =
= H =
= I I I
= J = J J
= K = K
= L = L
= M= =
12 inches (30 cm)
6 inches (15 cm) for appliance < 10,000 BTU/hr
(3 kW), 12 inches (30 cm) for appliance > 10,000
BTU/hr (3 kW) and <100,000 BTU/hr (30 kW),
36 inches (91 cm) for appliance > 100,000 BTU/
hr (30 kW)
*
*
*
*
*
3 feet (91 cm) within a height of 15 feet (4.5 m)
above the meter/regulator assembly
3 feet (91 cm)
6 inches (15 cm) for appliance < 10,000 BTU/hr
(3kW), 12 inches (30 cm) for appliance > 10,000
BTU/hr (3kW) and < 100,000 BTU/hr (30 kW),
36 inches (91 cm) for appliance > 100,000 BTU/
hr (30 kW)
6 feet (1.83 m)
7 feet (2.13 m) †
12 inches (30 cm) ‡
12 inches (30 cm)
6 inches (15 cm) for appliance < 10,000 BTU/hr
(3 kW), 9 inches (23 cm) for appliance > 10,000
BTU/hr (3 kW) and < 50,000 BTU/hr (15 kW), 12
inches (30 cm) for appliance > 50,000 BTU/hr
(15 kW)
*
*
*
*
*
*
*
6 inches (15 cm) for appliance < 10,000 BTU/hr
(3kW), 9 inches (23 cm) for appliance > 10,000
BTU/hr (3kW) and < 50,000 BTU/hr (15 kW), 12
inches (30 cm) for appliance > 50,000 BTU/hr
(15 kW)
3 feet (91 cm) above if within 10 feet (3 m)
horizontally
*
*
Canadian Installation
1
US Installation
2
1 In accordance with the current CSA B149.1 , Natural Gas and Propane Installation Code
.
2 In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code
.
† A vent shall not terminate directly above a paved sidewalk or paved driveway that is located between two single family dwellings
and serve both dwellings.
‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
* For clearances not specified in
ANSI Z223.1/NFPA 54 or CSA B149.1 , one of the following shall be indicated.
(a) A minimum clearances valve determined by testing in accordance with section 2.19.6, or ;
(b) A reference to the following footnote:
“ Clearance in accordance with local installation codes and the requirements of the gas supplier.”
11
VENTILATION INSTALLATION continued
VENT TERMINAL
AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMIETTED
X
V