Tjernlund SS1 SideShot (Discontinued Version - Pre UC1 Universal Control) 8504041 Rev A 11/99 - Manual (Page 17)

DRAFT ADJUSTMENT OIL
The SideShot Vent system will properly vent a wide range of BTU/hr. input capacities. To compensate for different burner capaci-
ties, vent connector lengths and wind conditions it features a draft adjustment located on the outside of the Vent Hood. In general,
positioning the draft adjustment inward will cause the SideShot to operate at lowest capacity. Positioning the draft adjustment
outward will cause the SideShot to operate at highest capacity.
IMPORTANT:
The following paragraph describes the initial draft adjustment. It may be necessary to make a slight readjustment to compensate
for various conditions: wind, vent connector resistance, negative building pressure and multiple appliances.
ASHRAE lists the average design factor for wind loads in North America at 15 MPH. Refer to the Draft Adjustment Chart on Page
17. We recommend that the 25 MPH category be used to allow for excursions beyond the 15 MPH average. It is not recom-
mended for the SideShot to be terminated on a wall that faces the direction of the prevailing winds. Backdrafts by severe winds
can cause oil odors to remain in the structure and/or interrupt heating equipment operation. If the SideShot is terminated in a
direction prone to higher winds, or if higher winds are common in your geographic area, use the 40 MPH category to determine the
proper draft adjustment setting. If the draft adjustment is set at the 25 MPH category and sustained winds exceeding 25 MPH are
present, the Fan Proving Switch will disrupt the burner until the wind load drops below 25 MPH. Wind loads referenced are based
on straight line winds directed against the Vent Hood.
DRAFT ADJUSTMENT PROCEDURE:
1) Set the draft adjustment to the appropriate setting based on the above instructions and the Draft Adjustment Chart. Adjustment
is accomplished by loosening both nuts on each side of the Vent Hood and centering both indicators to the desired setting.
Tighten the four nuts to secure the draft adjustment at desired setting.
2) Place the appliance and SideShot in operation. Measure the over-fire draft. Make necessary adjustments to the primary air
intake and barometric draft control to comply with the over-fire draft requirements of the appliance. In most cases, the over-fire
draft should be in a range of -.02" to -.04" W.C. If adjustments to the primary air intake and barometric draft control do not
provide the required over-fire draft, the SideShot draft adjustment must be repositioned, accordingly. Measure over-fire draft
after repositioning SideShot draft adjustment.
DRAFT ADJUSTMENT GAS
The SideShot Vent System will properly vent a wide range of BTU/hr. input capacities. To compensate for different burner capaci-
ties, vent connector lengths and wind conditions it features a draft adjustment located on the outside of the Vent Hood. In general,
positioning the draft adjustment inward will cause the SideShot to operate at lowest capacity. Positioning the draft adjustment
outward will cause the SideShot to operate at highest capacity.
IMPORTANT:
The following paragraph describes the initial draft adjustment. It may be necessary to make a slight readjustment to compensate
for various conditions: wind, vent connector resistance, negative building pressure and multiple appliances.
ASHRAE lists the average design factor for wind loads in North America at 15 MPH. Refer to the Draft Adjustment Chart on Page
17. We recommend that the 25 MPH category be used to allow for excursions beyond the 15 MPH average. It is not recom-
mended for the SideShot to be terminated on a wall that faces the direction of the prevailing winds. Backdrafts by severe winds
can cause oil odors to remain in the structure and/or interrupt heating equipment operation. If the SideShot is terminated in a
direction prone to higher winds, or if higher winds are common in your geographic area, use the 40 MPH category to determine the
proper draft adjustment setting. If the draft adjustment is set at the 25 MPH category and sustained winds exceeding 25 MPH are
present, the Fan Proving Switch will disrupt the burner until the wind load drops below 25 MPH. Wind loads are based on straight
line winds directed against the Vent Hood.
DRAFT ADJUSTMENT PROCEDURE
1) Set the draft adjustment to the appropriate setting based on the above instructions and the Draft Adjustment Chart. Adjustment
is accomplished by loosening both nuts on each side of the Vent Hood and centering both indicators to the desired setting.
Tighten the four nuts to secure the draft adjustment at desired setting.
2) Place the appliance and SideShot in operation. The appliance must be operated at its full input. Determine if there is any
spillage of flue gas from the draft hood or draft diverter. Spillage can be detected by holding a taper or other smoke producing
device adjacent to the draft hood or draft diverter and observing that the smoke is not being pulled into the draft hood or draft
diverter. If flue gas spillage is detected move the SideShot draft adjustment outward to the next highest setting and recheck for
flue gas spillage. Repeat as necessary until there is no flue gas spillage.
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