York DFAA, DFAH installation manual Home Layout Canadian Installations1 US Installation2

107272-UIM-B-1105

D

V	E
L	V

Fixed

Closed

B

C
	V
F	V
B

	G		Inside Corner Detail
	V
A			V
				Vent Terminal
		H
			X	Air Supply
	B B
B	I		X	Area Where Terminal is Not Permitted
		M
	V		V
V	X		K
	V
B	J		Fixed
			Closed
	Operable

FIGURE 34: Home Layout

	Canadian Installations1	US Installation2
A.Clearance above grade, veranda, porch, deck, or balcony	12 inches (30 cm)	12 inches (30 cm)
	12 inches (30 cm) for models <100,000 BTUH
B.Clearance to window or door that may be opened	(30 kW), 36 inches (91 cm) for models > 100,000	4 Feet
	BTUH (30 kW)
C.Clearance to permanently closed window	4 Feet	4 Feet
D.Vertical clearance to ventilated soffit located
above the terminal within a horizontal distance	4 Feet	4 Feet
of 2 feet (61 cm) from the center line of the terminal
E.Clearance to unventilated soffit	12 Inches	12 Inches
F. Clearance to outside corner	12 Inches	12 Inches
G.Clearance to inside corner	6 Feet	6 Feet
H.Clearance to each side of center line extended	3 feet (91 cm) within a height 15 feet (4.5 m)	3 feet (91 cm) within a height 15 feet (4.5 m)
	above the
above meter/regulator assembly		above the meter/regulator assembly
	meter/regulator assembly
I. Clearance to service regulator vent outlet	3 feet (91 cm)	3 feet (91 cm)
J. Clearance to nonmechanical air supply inlet to building	12 inches (30 cm) for models <100,000 BTUH
	(30 kW), 35 inches (91 cm) for models >100,000	4 Feet
or the combustion air inlet to any other appliance
	BTUH (30 kW)
K.Clearance to a mechanical supply inlet	6 feet (1.83 m)	3 feet (91 cm) above if within 10 feet (3 cm)
		horizontally
L. Clearance above paved sidewalk or paved driveway located on	7 feet (2.13 m) †	7 feet (2.13 m) †
public property
M.Clearance under veranda, porch, deck, or balcony	12 inches (30.4 cm)	12 inches (30.4 cm)
Vent Termination from any Building Surface	12" (30.4 cm)	12" (30.4 cm)
Above anticipated snow depth	12" (30.4 cm)	12" (30.4 cm)

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. In accordance with the current UL 311 Standard for Safety for Roof Jacks for Manufac-

tured Homes and Recreational Vehicles.

† A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.

‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor. For clearance not specified in UL 311 Standard for Safety for Roof Jacks for Manufactured Homes and Recreational Vehicles.

Clearance in accordance with local installation codes and the Manufacturer’s Installation Manual. 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 either:

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. * Does not apply to multiple installations of this furnace model. Refer to "VENTING MULTIPLE UNITS" in this section of these instructions.

IMPORTANT: 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” (50.8 cm). It is recommended that a retaining type collar be used that is attached to the building surface to prevent movement of the vent pipe.

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. Also in accordance with the current UL 727 Standard for safety for oil-fired central furnaces.

Unitary Products Group 21