Empire Comfort Systems MILLIVOLT DVD32FP30N-3, Руководство по установке, Страница: 22 / 68

43115-2-0821 43115-2-0821 Page 22
To Use the Vent Graph
1. Determine the height of the center of the horizontal vent pipe.
Using this dimension on the Sidewall Vent Graph, locate the
point it intersects with the slanted graph line.
2. From the point of this intersection, draw a vertical line to the
bottom of the graph.
3. Select the indicated dimension, and position the unit in
accordance with same.
EXAMPLE A:
If the vertical dimension from the floor of the unit is 12 feet, 4 inches
the horizontal run to the outer wall flange must not exceed 12 feet,
3 inches.
EXAMPLE B:
If the vertical dimension from the floor of the unit is 6 feet, 9 inches,
the horizontal run to the outer wall flange must not exceed 6 feet,
6 inches.
SPECIAL NOTE: For each 45 degree elbow installed in the
horizontal run, the length of the horizontal run MUST be reduced
by 18" (457 mm). This does not apply if the 45-degree elbows
are installed on the vertical part of the vent system. Reduce 3'
for every 90° elbow.
Example:
According to the chart the maximum horizontal vent length
is 20' and if two 45 degree elbows are required in the horizontal
vent it must be reduced to 17'.
The maximum number of 45 degree elbows permitted per side
wall installation is two. These elbows can be installed in either the
vertical or horizontal run.
Acceptable vertical and horizontal vent run.
Unacceptable vertical and horizontal vent run.
NOTICE: When rear venting unit, adjust air shutter from 1/16"
open up to between 1/8" and 3/16" for Natural Gas.
Adjust air shutter from 1/4" open to between 5/16" and to 3/8"
for Propane Gas.
NOTE: When rear venting unit, adjust air shutter from 1/16" open
up to between 1/8" and 3/16" for Natural Gas.
Adjust air shutter from 1/4" open to between 5/16" and 3/8" for
Propane Gas.
Figure 32
Venting Graph (Dimensions in Feet)
VENTING FIREPLACE - REAR