COMFORT-AIRE GDD92A, Руководство по установке

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507714-01 Page 25 of 52 Issue 1716
Figure 34. Flush Mount Side Wall Termination
2” EXTENSION FOR 2” PVC PIPE
1” EXTENSION FOR 3” PVC PIPE
1-1/2” ACCELERATOR
(
all -45, -070 and -090 units)
FURNACE
EXHAUST
PIPE
FURNACE
INTAKE
PIPE
4''
GLUE EXHAUST
END FLUSH INTO
TERMINATION
FLAT
SIDE
7. If intake and exhaust piping must be run up a side
wall to position above snow accumulation or other
obstructions, piping must be supported every 24” (610
mm) as shown in Figure 39.
When exhaust and intake piping must be run up an
outside wall, the exhaust piping must be terminated
with pipe sized per Table 9. The intake piping may be
equipped with a 90° elbow turndown. Using turndown
will add 5 feet (1.5 m) to the equivalent length of the
pipe.
8. Based on the recommendation of the manufacturer, a
multiple furnace installation may use a group of up to
four terminations assembled together horizontally, as
shown in Figure 37.
Figure 35. Direct Vent Concentric Rooftop
Termination
Minimum
Above Average
Snow
Accumulation
SHEET METAL STRAP
(Clamp and sheet metal strap
must be field installed to support
the weight of the termination kit.)
FLASHING
(Not Furnished)
CLAMP
FIELD-PROVIDED
REDUCER MAY BE REQUIRED
TO ADAPT LARGER VENT
PIPE SIZE TO TERMINATION
1 1/2” (38mm) accelerator
provided on 71M80 & 44W92
12” (305mm)
INTAKE
AIR
EXHAUST
VENT
Figure 36. Direct Vent Concentric Wall Termination
12” (305mm) Min.
above grade or
average snow
accumulation.
INTAKE
AIR
INTAKE
AIR
INTAKE
AIR
OUTSIDE
WALL
GRADE
CLAMP
(Not Furnished)
FIELD-PROVIDED
REDUCER MAY BE REQUIRED
TO ADAPT LARGER VENT
PIPE SIZE TO TERMINATION
EXHAUST
VENT
1-1/2” (38mm) accelerator
provided on 71M80 & 44W92
kits for -45 and -70 units
EXHAUST
VENT
Figure 37. Optional Vent Termination for Multiple Unit
Installation of Direct Vent Wall Termination Kit
Figure 38. Direct Vent Application Using Existing
Chimney
3” - 8”
(76MM-
203MM)
STRAIGHT-CUT OR
ANGLE-CUT IN DIRECTION
OF ROOF SLOPE
SHOULDER OF FITTINGS
PROVIDE SUPPORT
OF PIPE ON TOP PLATE
ALTERNATE
INTAKE PIPE
INTAKE PIPE
INSULATION (optional)
EXTERIOR
PORTION OF
CHIMNEY
INSULATE
TO FORM
SEAL
SHEET
METAL TOP
PLATE
Minimum 12” (305MM)
above chimney top
plate or average snow
accumulation
8” - 12”
(203MM - 305MM)
3”-8”
(76MM-203MM)
* SIZE TERMINATION PIPE
PER EXHAUST PIPE TERMINATION
SIZE REDUCTION TABLE
NOTE : Do not discharge exhaust gases directly into any chimney or
vent stack. If vertical discharge through an existing unused chimney
or stack is required, insert piping inside chimney until the pipe open
end is above top of chimney and terminate as illustrated. In any
exterior portion of chimney, the exhaust vent must be insulated.