Home Layout - Johnson Controls TG9S*MP Installation Manual

364861-UIM-H-0712
VENT CLEARANCES
D
E
B
L
FIGURE 30: Home Layout
Direct Vent Terminal Clearances
A. Clearance above grade, veranda, porch, deck, or
balcony
B. Clearance to window or door that may be opened
C. Clearance to permanently closed window
D. Vertical clearance to ventilated soffit located
above the terminal within a horizontal distance
of 2 feet (61 cm) from the center line of the terminal
E. Clearance to unventilated soffit
F. Clearance to outside corner
G. Clearance to inside corner
H. Clearance to each side of center line
extended above meter/regulator assembly
I. Clearance to service regulator vent outlet
J. Clearance to non-mechanical air supply inlet to
building or the combustion air inlet to any other
appliance
K. Clearance to a mechanical supply inlet
L. Clearance above paved sidewalk or paved
driveway located on public property
M. Clearance under veranda, porch, deck, or balcony
1. In accordance with the current CSA B149.1-00, Natural Gas and Propane Installation Code.
2. In accordance with the current ANSI Z223.1 / NFPA 54, National Gas Code.
3. In accordance with the current ANSI Z21.47 * CSA 2.3 American National Standard.
† A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
†† 12" (30.5 cm) up from the bottom edge of the structure for Two-pipe (direct vent) applications per ANSI Z223.1 / NFPA 54, National Gas Code.
‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor and the distance between the top of the vent termina-
tion and the underside of the veranda, porch, or deck is greater than 12" (30.5 cm) as specified in CSA B149.1-00.
A vent shall not terminate less than 12" (30.5 cm) above a grade level.
Any fresh air or make up inlet for dryer or furnace area is considered to be forced air inlet.
Avoid areas where condensate drippage may cause problems such as above planters, patios, or adjacent to windows where steam may cause fogging.
A terminus of a vent shall be fitted with a cap in accordance with the vent manufacturer's installation instructions, or in accordance with the installation instructions for a
special venting system.
Responsibility for the provision of proper adequate venting and air supply for application shall rest with the installer.
Vent shall extend high enough above building, or a neighboring obstruction, so that wind from any direction will not create a positive pressure in the vicinity of the vent.
Consideration must be given for degradation of building materials by flue gases. Sidewall termination may require sealing or shielding of building
surfaces with a corrosion resistant material to protect against combustion product corrosion. Consideration must be given to wind direction in order
to prevent flue products and/or condensate from being blown against the building surfaces. If a metal shield is used it must be a stainless steel
material at a minimum dimension of 20 inches (51 cm). It is recommended that a retaining type collar be used that is attached to the building sur-
face to prevent movement of the vent pipe.
24
G
V
A
H
FIXED
CLOSED
B
B
B
I
M
V
C
V
X
V
V
J
V
B
F
B
OPERABLE
Canadian Installations
12" (30.5 cm)
12" (30.5 cm) for models 100,000 BTUH (30 kW),
36" (91.4 cm) for models >100,000 BTUH (30 kW).
12" (30.5 cm)
12" (30.5 cm) or in accordance with local installation
codes and the requirements of the gas supplier.
12" (30.5 cm) or in accordance with local installation
codes and the requirements of the gas supplier.
12" (30.5 cm) or in accordance with local installation
codes and the requirements of the gas supplier.
3 feet (91.4 cm)
Above a meter/regulator assembly within 3 feet
(91.4 cm) horizontally of the vertical center-line of the
regulator vent outlet to a maximum vertical distance of
15 feet (4.5 m) above the meter/regulator assembly.
3 feet (91.4 cm)
12" (30.5 cm) for models 100,000 BTUH (30 kW),
36" (91 cm) for models >100,000 BTUH (30 kW).
6 feet (1.83 m)
7 feet (2.13 m)†
12" (30.5 cm)‡
V
VENT TERMINAL
X
AIR SUPPLY
AREA WHERE TERMINAL IS NOT PERMITTED
X
V
K
FIXED
CLOSED
1,3 2,3
US Installation
12" (30.5 cm)
Two-pipe (direct vent) applications: 12" (30.5 cm)††
Single-pipe applications: 4 feet (1.2 m).
12" (30.5 cm)
12" (30.5 cm) or in accordance with local installation
codes and the requirements of the gas supplier.
12" (30.5 cm) or in accordance with local installation
codes and the requirements of the gas supplier.
12" (30.5 cm) or in accordance with local installation
codes and the requirements of the gas supplier.
3 feet (91.4 cm)
Above a meter/regulator assembly within 3 feet
(91 cm) horizontally of the vertical center-line of the
regulator vent outlet to a maximum vertical distance of
15 feet (4.5 m) above the meter/regulator assembly.
3 feet (91.4 cm) or in accordance with local installation
codes and the requirements of the gas supplier.
Two-pipe (direct vent) applications: 12" (30.5 cm)
Single-pipe applications: 4 feet (1.2 m).
3 feet (91.4 cm) above if within 10 feet (3 m)
horizontally.
7 feet (2.13 m) or in accordance with local installation
codes and the requirements of the gas supplier.
12" (30.5 cm) or in accordance with local installation
codes and the requirements of the gas supplier
Johnson Controls Unitary Products
.