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Vent Screens
WARNING
Breathing Hazard - Carbon Monoxide Gas
Failure to install the appropriate screen could
result in improper heater operation with
attendant risk of property damage, personal
injury or death by fire or carbon monoxide
poisoning.
Breathing carbon monoxide can cause brain damage or death.
Always read and understand instruction manual.
The vent kit supplied with this water heater includes one
(1) pair of restrictive vent screens and one (1) pair of
debris screens (see Figure 38). For safety and optimum
efficiency performance, ensure the correct vent screen
is installed for the vent length in your installation. These
screens have been sized to ensure maximum energy
efficiency of the vent system based on the "equivalent
length" of the vent piping. Choose only the restrictive
screen that matches your venting configuration (see
Figure 38, Table 6 and Table 7). When required, the
restrictive vent screen MUST be installed for proper
operation of the water heater. How to determine the
"equivalent length" is shown in Table 5.
When required, the restrictive screens may be located at
the termination or next to the blower. In freezing weather
it is recommended to locate the restrictive screens next
to the blower to reduce the potential for frost buildup on
the intake screen.
•
Install the appropriate restrictive vent screen into the
vent system.
•
Install the debris vent screen in both the air intake pipe
and the exhaust pipe.
•
The debris screens are to be installed at the termination
to keep foreign materials out of the venting.
•
If there are restrictive screens installed at the
termination, the debris screens are not required.
•
Restrictive vent screens in the termination must be
secured with corrosion resistant sheet metal screws.
This will allow for easy removal for inspection and
cleaning.
•
The debris vent screens are self-securing.
Note: The same vent screen type (restrictive or debris)
should be installed in the intake and the exhaust piping. In
the concentric vent application, the screen is to be installed
in the exhaust piping only.
34
VENT
SIZE
(INSIDE
RESTRICTIVE
DIAM.)
2"
FOR VENT LENGTH
LESS THAN OR EQUAL
TO 20 EQUIVALENT
FT. USE THIS SCREEN
3"
FOR ALL VENT LENGTHS
USE THIS SCREEN
4"
FOR ALL LENGTHS OF
VENTING USE THIS
SCREEN (SUPPLIED)
www.hotwater .com
VENT SCREEN
DEBRIS
(SUPPLIED).
(SUPPLIED).
Figure 38.
100324051_2000579115 _Rev. 01
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