Advertisement
DRAFT CONTROL INSTALLATION
CAUTION: This draft control is shipped as a single acting draft control. If the draft
control is not being used on a gas draft induced furnace, remove the gate stop on
the draft control ring before installing.
C
I
OLLAR
NSTALLATION
This control is shipped with a collar patterned to fit a single wall round vent pipe. To
attach this collar to the flue, See Figure 4 and follow the instructions below.
1. Bend outward the two ears at the front corners of the collar. Bend 90 degrees,
1/4 inch behind the single hole on the straps.
2. Insert clamping screw in ears on collar and bolt the remainder of the collar
together.
3. Hold the collar against the side of the flue in the exact position it is to be installed (shown by dotted lines) and mark
the outline of the collar on the flue.
4. Cut a hole in the flue about 1/2" inside of this outline.
5. Make a series of cuts about 1/2" apart from the edge of this hole to the outline marks.
6. Strap the collar to the flue pipe.
7. Bend the tabs formed by the series of cuts outward against the inside of the collar to make a tight joint.
8. Insert the draft control. (See Draft Control Installation and Adjustment Section.)
D
C
I
RAFT
ONTROL
NSTALLATION
CAUTION: DO NOT use the supplied collar when mounting draft
control to Type B Vent Pipe. Install by using a Type B Vent Pipe
Tee.
1. Install a vent pipe reducer or increaser into the inner pipe and
fasten using sheet metal screws. (See Figure 5)
2. The opening of the Type B Vent Tee, at the draft control
mounting location, should be sealed with a high temperature
sealant or equivalent.
3. Refer to Draft Control Installation Section.
DRAFT CONTROL INSTALLATION AND ADJUSTMENT
1. Insert the draft control into the collar or tee. The front face of
the control MUST be plumb and the bearing surfaces MUST
be level whether the control is on a horizontal, vertical or
sloping flue pipe.
2. Use a spirit level and level accurately. (See Figure 5) Secure
the control in the collar by tightening the clamping screws. If a
tee is used or a collar is supplied locally, the control may be
held in place by sheet metal screws.
A
T
D
C
DJUSTING
HE
RAFT
ONTROL
The control MUST be adjusted to the desired draft setting by
adding or removing the washer-type weights supported by the two
chains on the side of the draft control. (See Figure 6) DO NOT
move the weight attached directly to the gate, this is used only for
balancing at the factory.
W
D
S
HAT
RAFT
ETTING TO
When adjusting the control, two things are essential;
1. The burner must be operating for at least 10 minutes to obtain
maximum chimney draft.
2. An analysis of the flue gases is necessary to determine the
percentage of CO
and check for presence of CO.
2
Refer to the appliance instructions and/or to the local gas company for the proper CO
A rule of thumb for draft setting is between .01" to .03" of water column draft at the appliance outlet. (Check equipment
requirement.)
Changes in the adjustment of the 4" MG1 control should be made by adding or removing the washer-like weights
(supplied with the control) to or from the weight holder chain assembly. After the control is adjusted, it's action will be
entirely automatic, the gate will open or close by itself to correct for changes in the draft that occur in the chimney.
I
T
B V
P
N
YPE
ENT
IPE
W
4" MG1
ITH
U
SE
Page 3
readings and allowable CO levels.
2
Figure 4
Figure 5
Figure 6
Advertisement
