reading of -.02 to -.03” W.C..
IMPORTANT:
If a minimum of -.02” W.C. cannot be obtained by adjusting the barometric
damper closed (more draft), the SS1 draft control on the vent hood should be pushed out (more draft) and the barometric
damper readjusted to reach -.02 to -.03” W.C..
6. Perform a smoke test and make any adjustments to the burner air shutter, SS1 draft control on the vent hood or the barometric
draft control to arrive at a trace of smoke (between 0 and 1) at a minimum over fire draft of -.02” W.C..
7. Perform a CO
2
test at the same location as the smoke test. Reduce the CO
2
1% to 2% by opening the burner air shutter.
Recheck over fire draft and increase venter draft or adjust barometric damper closed (more draft) if necessary to maintain a
minimum of -.02” W.C..
Do not allow heating system to run at less than a -.02” W.C. over fire draft or at a CO
2
level that is less than a 1% reduction from
the value measured at a trace of smoke and a -.02” W.C. over fire draft. If these parameters are unobtainable, contact Tjernlund at
1-800-255-4208 for Technical Assistance.
8. Remove the call for heat from the heating system.
NOTE:
The SS1 will run in post-purge mode which is factory set at 2
minutes and adjustable up to 16 minutes. Allow the system to cool down to ambient room temperature.
9. Restart the heating system.
10. At 5 minutes into the restart, read and record the inlet temperature ________F. If this temperature is above 250
0
F, continue to
step 11. If this temperature is below 250
0
F, use an approved insulated pipe / vent connector. Verify that the over fire draft and
CO
2
have not changed, If they have, redo the adjustment steps. With insulated pipe / vent connector, redo the 5 minute tem-
perature test and record the new value here ________F. If insulated pipe / vent connector did not increase the inlet tempera-
ture above 250
0
F. within 5 minutes of the heating system call for heat, call 800-255-4208 for technical support.
11. Lock down the burner primary air adjustment, the barometric adjustment knob and the SS1 draft adjustment with four lock nuts
on adjustment cone brackets, (See Diagram P). Verify the over fire draft and CO
2
readings have not changed from the earlier values.
DRAFT ADJUSTMENT PROCEDURE FOR GAS EQUIPMENT
DRAF
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 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 adjust-
ment 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.
IMPORTANT:
Before proceeding, close all windows, doors and fireplace dampers. Turn on all appliances in the structure that exhaust indoor air
such as clothes dryer, exhaust fans, range hoods, bathroom and whole house exhaust fans. Failure to perform the draft adjust-
ment procedure may cause a poor vent system installation possibly resulting in fire, carbon monoxide poisoning, explosion, per-
sonal injury or property damage.
DRAFT ADJUSTMENT PROCEDURE
1. Set the draft adjustment on SS1 Vent Hood 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 heating system into operation.
NOTE:
there will be a slight pause between venter operation and burner operation. A
Venter pre-purge of up to a minute may also be selected. See “Pre / Post-Purge Settings” on page 5. If installation uses a
barometric draft control adjust it to the minimum or least draft setting. Allow heater to operate for 5 minutes.
3.
PREFERRED METHOD:
MUST HAVE DRAFT GAUGE AVAILABLE
Sample draft one foot after draft hood, diverter or barometric draft control using a draft gauge. If the draft reading is in excess of
-0.05” W.C. adjust SS1 Vent Hood cone in (less draft) or adjust barometric for (less draft) so that a draft reading of -0.02” to
-0.05” W.C. is obtained. Never adjust draft to a setting of less than -0.02” W.C. If the vent system is terminated on a wall
subject to prevailing winds a -0.05” W.C. draft setting is recommended.
4. If a draft gauge is not available test for spillage at the draft hood, diverter or barometric draft control using the flame from a
match, lighter or candle and determine the following:
A. The flame or smoke is being drawn into the draft hood, diverter or barometric draft control.
B. The main burner is burning properly, i.e. no floating, lifting or flash back.
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