INSTALLATIONS MUST COMPLY WITH:
Local, state, provincial, and national codes, laws, regulations and ordinances.
The latest version of the National Fuel Gas Code, ANSI Z223.1, from American Gas Association Laboratories, 8501 East Pleasant
Valley Road, Cleveland, OH 44131.
In Canada - CGA No. B149 (latest version), from Canadian Gas Association Laboratories, 55 Scarsdale Road, Don Mills, Ontario,
Canada M3B 2R3. Also, Canadian Electrical Code C 22.1, from Canadian Standards Association, 5060 Spectrum Way, Suite 100,
Mississauga, Ontario, Canada L4W 5N6.
Code for the installation of Heat Producing Appliances (latest version), from American Insurance Association, 85 John Street, New
York, NY 11038.
The latest version of the National Electrical Code, NFPA No. 70.
NOTE: The gas manifold and controls met safe lighting and other performance criteria when the water heater underwent tests specified
in ANSI Z21.10.3 - latest edition.
TABLE OF CONTENTS
PART 2 - SAFETY REGULATIONS ........................................................................................................................................... 7
B. IMPROPER COMBUSTION ....................................................................................................................................................... 8
C. GAS ............................................................................................................................................................................................ 8
E. WATER CHEMISTRY ................................................................................................................................................................. 8
F. FREEZE PROTECTION ............................................................................................................................................................. 9
G. SCALDING ................................................................................................................................................................................. 9
H. HIGH ELEVATION INSTALLATIONS......................................................................................................................................... 9
B. LEVELING ................................................................................................................................................................................ 16
C. CLEARANCES FOR SERVICE ACCESS ................................................................................................................................ 16
E. EXHAUST VENT AND INTAKE PIPE....................................................................................................................................... 17
F. CARBON MONOXIDE DETECTORS ....................................................................................................................................... 17
I. UNCRATING THE WATER HEATER ........................................................................................................................................ 18
PART 5 - VENTING ................................................................................................................................................................... 19
B. APPROVED VENT MATERIALS .............................................................................................................................................. 23
C. ALLOWED COMBINED VENT LENGTHS ............................................................................................................................... 23
4
WHL-004 REV. 5.26.17