Draft Regulators - Thermo Pride OT11-105FBP Installation And Operation Manual

All installations and services must be performed by qualified service personnel.
NOTE: On the front flue, lowboy, it is possible to rotate the flue elbow (which is factory installed for vertical
discharge) 90° counterclockwise from the vertical position to adapt to various venting systems. (See following page
for details)
c CAUTION MUST BE TAKEN NOT TO EXCEED 90° ROTATION (OF THE FLUE
ELBOW) COUNTERCLOCKWISE OR RIGHT FROM THE VERTICAL POSITION.
ROTATION OF FRONT FLUE ELBOW
When an installation requires that the flue exit out the left hand side casing on a front flue unit, remove screw
securing the 90 deg. elbow and rotate it 90° counterclockwise. Then, by following dimensions in Table 1, locate the
center point for the exit of the flue for the particular size furnace. Once the center has been located, use a scribe to
mark the hole size, listed in the chart, which corresponds with the furnace being used. Cut hole out and extend flue
through side casing.
A trim collar may be ordered from Thermo Products to hide the gap around the flue pipe. This trim collar, however,
is not required for operation.
NOTE: ROTATION OF FLUE PIPE IS ONLY ALLOWED FOR LEFT HAND SIDE VENTING
APPLICATIONS.
TABLE 1: Suggested sizes and positions of flue pipe opening on left hand side of casing.
UNIT DIA. HOLE
OL5* 6-1/2"
OL11* 6-1/2"
OL16* 7-1/2"
* FRONT FLUE MODELS ONLY
"X" DIMENSION IS MEASURED FROM SEPARATOR PANEL.
"Y" DIMENSION IS MEASURED FROM THE BASE ON "L" MODELS.
A. DRAFT REGULATORS:
A draft regulator is supplied with the furnace and should be installed according to the regulator manufacturers
recommendations. With the burner operating, use a draft gauge to adjust the regulator to the proper setting. (refer to
the instructions enclosed with draft regulator to adjust to the proper setting). When the burner air supply and draft
are properly adjusted, the overfire draft should be a negative (-).01" to (-).02" WC, as measured at the 5/16" overfire
"X" DIM.
4-5/8"
4-1/2"
4-1/2"
Fig 1: Recommended location for drilling hole to connect
vent pipe to the furnace through the left hand side casing.
"Y" DIM. FLUE DIA.
34-15/16" 6"
37-5/8" 6"
39-1/8" 7"
3
TRIM COLLAR/
GASKET PART #
14131/330005
14131/330005
14132/330006