Tjernlund SS1C SideShot with UC1 Universal Control (Version X.02) 8504103 Rev 07/02 - Manual (Page 18)

DRAFT ADJUSTMENT PROCEDURE FOR OIL EQUIPMENT
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
16. We recommend that the 25 MPH category be used to allow for excursions beyond the 15 MPH average. It is not recommended
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.
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.
1. Set the draft adjustment on SS1C 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. Insert a stack thermometer into the vent pipe as close as possible to the SS1C inlet. NOTE: plug hole when finished with installation.
3. Adjust barometric draft control to the minimum or least draft setting.
4. Place the heating system into operation. NOTE: There will be a slight pause between the venter operation and the burner operation.
A Venter pre-purge of up to a minute may also be selected. See “Pre / Post-Purge Settings” on page 5.
5. Continuously monitor the over fire draft and adjust the barometric damper to maintain a reading of -.02 to -.03” W.C..
When the flue gas temperature at the venter inlet has stabilized make any final draft adjustment necessary to maintain a
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 SS1C 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, SS1C 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 SS1C 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 _______C. If this temperature is above 121 0 C (250 0 F),
continue to step 11. If this temperature is below 121 0 C (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 temperature test and record the new value here _______C. If insulated pipe / vent connector did not
increase the inlet temperature above 121
0 C (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 SS1C draft adjustment with four lock
nuts on adjustment cone brackets, (See Diagram P). Verify over fire draft and CO 2 readings have not changed from earlier values.
DRAF
COMBUSTION AIR
Adequate combustion air is vital for proper combustion and for safe venting. Likewise, for proper SS1C performance, adequate
combustion air must be available to the appliance. Many installers assume adequate combustion air is present, especially in older
homes. In some cases this is a false assumption, because many older homes have been made "tight" due to weatherization. Size
the combustion air opening(s) into the appliance room as outlined in local or national codes. When installing a SS1C, it is not nec-
essary to supply any more combustion air than normally required when conventional venting. Common symptoms of inadequate
combustion air include: Fan Proving Switch short cycling, odor present at the end of burner cycle, outside air enters the structure
through the SS1C Vent System on SS1C/Appliance off cycle.
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