GSW 6G40NAV, Инструкция по установке и эксплуатации, Страница: 28 / 112

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Venting Terminations And Sizing
•
Refer to Table 3 for vent pipe materials and sizing. If
the installation requires a vent riser, suitable drainage
must be provided to ensure condensation does not
accumulate (see Figure 29). Termination through a roof
is shown Figure 21.
Vent Screen Installation
Installed in the vent termination elbow, the vent screen
is required to keep foreign objects, rodents and small
birds from entering the venting system. These screens
have been sized to ensure maximum energy ef
fi ciency of
the vent system based on the “equivalent length” of the
vent piping. CHOOSE ONLY the ONE SCREEN THAT
MATCHES YOUR VENTING CONFIGURATION (see
Figure 27 & Figure 28). How to determine the “equivalent
length” is shown in Table 3.
•
Supplied with this heater are several vent termination
screens (see Figure 27 & Figure 28).
•
Install the appropriate vent screen into the vent
termination elbow.
•
Gently push the screen into the termination elbow until
it sits against the inside shoulder.
•
The metal wire screens are self-securing.
•
Plastic screens must be secured with (2) drops of
silicone sealant. This will allow for easy removal for
inspection and cleaning.
with 2” venting (short) with 2” venting (long)
For heater models 40-40 & 50-45
VENT LENGTH LESS THAN OR
EQUAL TO 6 EQUIVALENT METRES
(20 EQUIVALENT FT.)
USE THIS SCREEN (SUPPLIED).
VENT LENGTH GREATER THAN
6 EQUIVALENT METRES
(20 EQUIVALENT FT.)
USE THIS SCREEN (SUPPLIED).
with 4” venting with 3” venting
VENT LENGTH GREATER THAN
38 EQUIVALENT METRES
(125 EQUIVALENT FT.)
USE THIS SCREEN (SUPPLIED).
FOR ALL LENGTHS OF VENTING
USE THIS SCREEN (SUPPLIED).
Figure 27
Note: The same screens should be installed in the intake
and the exhaust piping. These screens are supplied in the
vent kit. In the concentric vent application, screen is to be
installed in the exhaust piping only.
Important: Failure to install the appropriate screen in the
vent termination elbows could result in improper heater
operation with attendant risk of property damage, personal
injury or death by
fi re or carbon monoxide poisoning.
with 4” venting
VENT LENGTH GREATER THAN
15.2 EQUIVALENT METRES
(50 EQUIVALENT FT.) USE THIS
SCREEN (SUPPLIED).
with 3” venting (short) with 3” venting (long)
For heater models 50-58, 50-62, 75-72 & 75-76
VENT LENGTH LESS THAN OR
EQUAL TO 6 EQUIVALENT METRES
(20 EQUIVALENT FT.)
USE THIS SCREEN (SUPPLIED).
VENT LENGTH GREATER THAN
6 EQUIVALENT METRES
(20 EQUIVALENT FT.)
USE THIS SCREEN (SUPPLIED).
Figure 28