507276-03
Page 29 of 59
Issue 1621
Details of Intake and Exhaust Piping Terminations for
Direct Vent Installations
NOTE:
In Direct Vent installations, combustion air is taken
from outdoors and flue gases are discharged to outdoors.
NOTE:
Flue gas may be slightly acidic and may adversely
affect some building materials. If any vent termination
is used and the flue gases may impinge on the building
material, a corrosion-resistant shield (minimum 24 inches
square) must be used to protect the wall surface. If the
optional tee is used, the protective shield is required.
The shield should be constructed using wood, plastic,
sheet metal or other suitable material. All seams, joints,
cracks, etc. in the affected area should be sealed using an
appropriate sealant. See Figure 36.
Intake and exhaust pipes may be routed either horizontally
through and outside wall or vertically through the roof. In
attic or closet installations, vertical termination through
the roof is preferred. Figures 35 through 43 show typical
terminations.
1. Intake and exhaust terminations are not required to be
in the same pressure zone. You may exit the intake on
one side of the structure and the exhaust on another
side (Figure 36). You may exit the exhaust out the roof
and the intake out the side of the structure (Figure 37).
2. Intake and exhaust pipes should be placed as close
together as possible at termination end (refer to
illustrations). Maximum separation is 3” (76 mm) on roof
terminations and 6” (152 mm) on sidewall terminations.
3. On roof terminations, the intake piping should terminate
straight down using two 90° elbows (See Figure 35).
4. Exhaust piping must terminate straight out or up as
shown. A reducer may be required on the exhaust piping
at the point where it exits the structure to improve the
velocity of exhaust away from the intake piping. See
Table 8.
NOTE:
Care must be taken to avoid recirculation of exhaust
back into intake pipe.
Figure 35
Figure 36
EXHAUST PIPE TERMINATION SIZE REDUCTION
Table 8
*
-045, -070 and -090 Units with the flush mount termination must use the 1-1/2”
accelerator supplied with the kit.
MODEL
Exhaust Pipe Size
Termination
Pipe Size
030, 045 & 070
2”(51mm), 21/2”(64mm),
3”(76mm)
1-1/2”(38mm)
90
2”(51mm)
110
2”(51mm)
135
3”(76mm)
2”(51mm)
Содержание 95G1UHE
Страница 3: ...507276 03 Page 3 of 59 Issue 1621 EXPANDED VIEW Figure 1 ...
Страница 22: ...507276 03 Page 22 of 59 Issue 1621 Figure 25 Figure 26 ...
Страница 28: ...507276 03 Page 28 of 59 Issue 1621 Figure 34 ...
Страница 38: ...507276 03 Page 38 of 59 Issue 1621 Figure 57 Trap Drain Assembly Using 1 2 PVC or 3 4 PVC ...
Страница 40: ...507276 03 Page 40 of 59 Issue 1621 Figure 59 Figure 60 ...
Страница 44: ...507276 03 Page 44 of 59 Issue 1621 TYPICAL WIRING DIAGRAM Figure 65 ...
Страница 57: ...507276 03 Page 57 of 59 Issue 1621 Start Up Performance Check List ...