Enviro DV36 owner manual Vent restrictor is located in the center

Initial Installation

QUALIFIED INSTALLERS ONLY

VENT CONFIGURATIONS AND RESTRICTOR SETTINGS:

Figures 23 shows the range of venting options, it shows possible vent configurations if the unit is top vented, for vertical and horizontal terminations, any layout that remains within the shaded area is acceptable. Having the fewest number of elbows is ideal, as they tend to disrupt air movement. Using 45˚ elbows is preferable to using 90˚ elbows. Also, a shorter vent system will perform better than a longer one.

The vent restrictor controls the amount of air moving through the vent pipe. Longer vertical vent lengths necessitate greater restriction; position 1 is open and position 5 is maximum restriction. Figure 31 shows the vent restrictor position required,

NOTE: The total length of the vent pipes can	relative to the length of vent pipe. The
not exceed 32 feet (15.12 m). Any combination	vent restrictor is located in the center of
of rise and run can be used as long as it lays	the fireplace, above the glass. Figure 32
within the shaded area (a total of three (3) 90°
	shows the vent restrictor dial and the holes
elbows or six (6) 45° elbows can be used).
In addition to what is shown, if a 90°	that indicate the different levels. To avoid
elbow is used in the horizontal plane,	injury, it is best to make this adjustment
3 feet (91.4 cm) must be subtracted
	when the fireplace is cool or use welder’s
from the allowable horizontal run
(for each 45° elbow, 11⁄2 feet	gloves or oven mitts.
must be subtracted from the	Note: 0,0 in Figure 31 represents a 90˚
allowable horizontal run).
	bend directly off the outlet of the unit, 413⁄4
	inches (106 cm) from floor, in all horizontal
	instances except when using Selkirk and
	having less than a 4 feet (1.22 m) rise
	and 8 feet (2.44 m) horizontal offset. In
	this case, a 1 foot (30.5 cm) rise must be
	added below the 90˚ bend.
	Note for rear vented: At 293⁄8 inches (75
	cm) up, the maximum horizontal rear exit
	vent length is 17 inches (43 cm) with a 45°
	elbow (see Figure 17).

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Figure 31. Possible Vent Configurations for Top Vented; Vertical Figure 32. Possible Vent Restrictor Positions. and Horizontal Terminations.

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