Installation / Operation Instruction Manual

SECTION V: VENTING

WARNING

The venting system must be installed properly following all local codes or in the absence of local codes, the

latest edition of the National Fuel Gas Code (ANSI Z223.1- latest edition), or in Canada, The Natural Gas

Installation Code (B149.1-00 latest edition) or CAN/CGA B149.2 Propane Installation Code (Latest Edition).

Failure to properly install the venting system could result in property damage, personal injury, or

death.

Carefully inspect the venting system of a replacement water heater installation before connecting to the

venting system. All joints in the vent connector must be securely fastened with screws and fit tightly

together. Inspect the venting system for signs of deterioration (rust and perforation) and replace any sections

that are not in good condition.

The chimney must be lined and in good condition. Check to make sure the venting system is properly sized

for the water heater. When an existing Category I appliance is removed or replaced, the original venting

system may no longer be sized to properly vent the attached appliances. If the venting system was

previously sized for another gas appliance that has been removed, the venting system may now be too

large. Refer to the latest edition of the National Fuel Gas Code (ANSI Z223.1-latest edition), or in Canada,

the Natural Gas and Propane Installation Code (B149.1-00 latest edition) for the correct sizing of venting

systems and common venting with another gas appliance. DO NOT vent this water heater into the venting

system of another gas appliance designed to vent under positive pressure.

The water heater should be installed as close as practical to the venting system to minimize the vent

connector length required. Refer to local codes for the distance limitations on vent connector lengths. At the

completion of the water heater installation, the burner and venting system must be checked for proper

operation with all other commonly vented appliances in operation. Refer to the latest edition of the National

Fuel Gas Code, or in Canada, the Natural Gas and Propane Installation Code for complete details on the

“Procedure to Be Followed to Place Equipment in Operation”.

This water heater must be connected to a lined masonry chimney or venting system approved by local codes

or ordinances. The vent connector used to attach the flue collar outlet to the chimney or approved vent must be

of the same diameter as the flue collar outlet or larger. For proper venting in certain installations, a larger vent

connector may be needed. Consult venting tables in ANSI standard (Z223.1- latest edition), National Fuel Gas

Code and CAN/CGA (B149.1 or B149.2-latest editions) Natural Gas and Propane Installation Code, or local

code officials for proper application for your area.

Exhaust Horizontal Installation:

In a horizontal application, it is important that condensate not

be allowed to buildup in the exhaust vent pipe. To prevent

this from happening the pipe should be installed with a slight

upward slope so the condensate will run back toward the

water heater. The vent system should be supported every 5

feet (1.5 m) of vertical run and every 3 feet (1 m) of horizontal

run of vent pipe length. The venting system should have

horizontal runs sloping upwards not less than ¼ inch (21

mm/m) from the appliance to the vent terminal.

Optional Power Vent Kits –

for side wall termination only:

UCG80H125(N,X):

415-54385-01

UCG(80,100)H(199,270)(N,X):

415-54385-02