Sterling TD - Manual (Page 16)

16
VENTING (continued)
VENTING FOR POWER VENTED DUCT FURNACES (CATEGORY III) (continued)
Horizontal portions of the venting system shall be
supported at maximum intervals of 4 feet (1.2m) to
prevent sagging. In Canada, support at a maximum of
3 feet (1m) intervals. Each unit must have an individual vent pipe and vent
terminal per furnace section! Each unit MUST NOT be
connected to other vent systems or to a chimney.
Vent Systems Termination Clearance Requirements
Structure/Object
Minimum Clearance for Termination Locations
USA CANADA
Door, window, or gravity vent inlet; combustion
air inlet for other appliances 9 inch for 10,000 to 50,000 BTU/Hr input;
12 inch for input exceeding 50,000 BTU/Hr. 9 inch (230mm) for 10,000 to 50,000 BTU/Hr input;
12 inch (305mm) for input exceeding 50,000 BTU/Hr.
Forced air inlet within 10 feet 3 feet above 6 feet (1.8m)
Adjoining Building or parapet 10 feet 10 feet (3.04m)
Adjacent public walkways 7 feet above grade 7 feet (2.1m) above grade
Electric, gas meters & regulators 4 feet horizontal
3 feet (0.9m) horizontally from meter/regulator
asembly. 6 feet (1.8m), any direction, from a gas
service regulator vent outlet
Above grade level* 1 foot 1 foot (0.3m)
*Minimum above maximum snow depth, or per local code, whichever is greater.
ADDITIONAL REQUIREMENTS FOR CANADIAN INSTALLATIONS
REFER TO SPECIFICATION TABLE AND INSTALLATION MANUAL FOR PROPER USAGE
The following instructions apply to Canadian installations in addition to installation and operating instructions.
1. Installation must conform with local building codes, or in the absence of local codes, with current CSA-B149.1, Installation Codes for Natural
Gas Burning Appliances and Equipment, or CSA-B149.2, Installation Codes for Propane Gas Burning Appliances and Equipment.
2. Any reference to U.S. standards or codes in these instructions are to be ignored, and the applicable Canadian standards or codes applied.
Table 6