Water Heater Installation Manual
25 Page
-Exhaust vent (Stainless steel vent)-
This is a Category IV appliance and must be vented accordingly. The vent system must be sealed airtight. All
seams and joints without gaskets must be sealed with high heat resistant silicone sealant or UL listed aluminum
adhesive tape having a minimum temperature rating of 160 °F (71 °C). For best results, a vent system should be
as short and straight as possible.
•
for use with Category III/IV or Special BH type gas vent.
• The manufacturer recommends the NovaVent® or Z-Vent® venting manufactured by Z-Flex® U.S. and are
listed to UL 1738.
• Follow the vent pipe manufacturer’s instructions when installing the vent pipe.
• The maximum length of exhaust vent piping must not exceed 100 ft (30.5 m) (deducting 5 ft (1.5 m) for
each elbow used in the venting system). Do not use more than 5 elbows.
• When the horizontal vent run exceeds 5 ft (1.5 m), support the vent run at 3 ft (0.9 m) intervals with over-
head hangers.
Diameter Max. No. of Elbows Max. Vertical and Horizontal (Total) Vent Length*
4 in 5 100 ft (30.5 m )
*For each elbow added, deduct 5 ft. (1.5 m) from max. vent length.
Excludes vent terminators, termination elbows, or rain caps.
No. of Elbows Max. Vertical or Horizontal Vent Length No. of Elbows Max. Vertical or Horizontal Vent Length
0 100 ft (30.5 m) 3 85 ft (25.9 m)
1 95 ft (29.0 m) 4 80 ft (24.4 m)
2 90 ft (27.4 m) 5 75 ft (22.9 m)
Installaon
Installaon Manual
-DIP switch settings for vent length-
stainless steel vents
Roof
Fire stop
Rain cap
Wall
Sidewall vent
Hanger
Hanger
For details of the optional items, refer to the Installation manual for each optional item.
X3™ CARTRIDGE NOT SHOWN.
WARNING
• Adjust the appropriate DIP switches according to model and vent length as shown
below. DO NOT adjust the other DIP switches.
• Turn off the power supply to the water heater before changing the DIP switch settings.
• Failure to observe these warnings could lead to carbon monoxide poisoning or death.