Table of Contents
Advertisement
WALL PENETRATION
1.
Prior to installation, determine proper location of wall thimble (WT) or wall thimble
insulated (WTI) so that a minimum slope of 1/4" (6mm) per foot is maintained in
the horizontal section of vent to ensure proper flow of condensation.
Prepare the wall by cutting a square opening. See table 6 for opening dimension.
2.
3.
Install the wall thimble by inserting the larger of the two parts on the appliance
(interior side). See figure 8.
4.
Next, apply a bead of sealant around the edges of the exterior (smaller of the
two parts) wall thimble component. Then install this part of the wall thimble by
inserting the smaller collar into the other component from the previous step.
NOTE: The two horizontal cylinders of the thimble must engage a
minimum of two inches.
5. Fasten both sides of the wall thimble using screws or nails.
6. Once the thimble is installed, DuraSeal
the thimble.
7. Close the gap between the thimble and the vent by installing the two half
plate and fasten it using screws or nails.
8. Install horizontal termination to complete the assembly.
9. Once assembly is completed, apply a bead of high-temp sealant around
the pipe and the exterior two half plates of the thimble to protect against
weather.
10. The air gap is filled with insulation when using the insulated wall thimble
(WTI).
2" Minimum overlap
Opening dimension
See table 6
Air gap or
insulated
Figure 8 - Wall penetration
10
vent pipe can be inserted into
®
Add sealant
Termination
Two half plate
Wall Thimble
(WT/WTI)
ROOF / FLOOR PENETRATION
1.
A roof thimble (RT) or roof thimble insulated (RTI) for cold climate must be installed
every time the vent system passes through a floor or roof.
Prepare the roof / floor by cutting a square opening. See table 6.
2.
3.
Install the roof thimble. You may cut the radiation sleeve if it is too long. See
figure 9.
4.
For roof installation, install a flashing.
Flashing
Air gap
or insulated
Opening dimension
See table 6
Figure 9 - Roof penetration
CONDENSATE DRAINS
When an internal condensate drain is NOT part of the appliance:
1. A Drain length (DL) or a Tee with a drain tee cap (DTC) is strongly recommended.
Install this drain as close as possible to the appliance flue collar.
2.
A condensate drain is required for every 30 feet of horizontal vent and at the bottom
of a vertical stack.
3.
Use the Drain length for a straight horizontal run. Rotate the fitting so that the
drain tube is as vertical as possible.
4.
Use a Tee at a transition from horizontal to vertical, and attach the Drain Tee Cap
to the appropriate branch of the tee.
5.
A condensate drain tube kit is available to direct the condensate to an appropriate
location. A trap loop must be formed into the drain hose and must be a diameter
that is at least four times the appliance's rated stack pressure in inches of water
column or minimum 3 inches. Secure the loop with a cable tie.
6.
Flue gas condensate can have a low (3 to 5) PH level, follow all local and national
codes and regulations for the draining of acidic condensate.
7.
In cold climate, do not install a condensate drain on the exterior of the building.
Doing so may result in dangerous icy conditions on surfaces near the drain and
may cause damage to the vent system and the building exterior. DuraVent will
NOT be held liable for any injury or property damage due to formation of ice.
Roof support
Roof thimble
Advertisement
Table of Contents
