Tjernlund SS2 SideShot (Discontinued Version - Pre UC1 Universal Control) 8504063 Rev B 11/99 - Manual (Page 14)

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COMBUSTION AIR
Adequate combustion air is vital for proper combustion and for safe venting. Likewise, for proper SS2 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 NFPA 54/NFPA 211. When installing a SS2, it is not necessary
to supply any more combustion air than normally required when conventional venting. Common symptoms of inadequate combus-
tion air include: Fan Proving Switch short cycling, odor present at the end of burner cycle, outside air enters the structure through
the SS2 Vent System on SS2/Appliance off cycle.
FINAL SYSTEM OPERATION CHECK-OUT
1. Adjust thermostat or appliance controls to call for heat.
2. Verify that the SS2 operates first, prior to burner ignition.
Allow heating equipment and SS2 to operate continuously while performing steps 3-5.
3. Close all doors and windows of the building. If heating equipment is installed in utility room or closet, close the entrance door to
this room. Close fireplace dampers.
4. Turn on all appliances in the structure that exhaust indoor air during their operation, e.g. turn on clothes dryer and exhaust fans
such as range hoods, bathroom exhaust and whole house fans.
5. Allow SS2 and equipment to operate for at least 15 minutes. Tripping of the burner circuit by the Fan Prover Switch during the
15 minute operation indicates an unsafe operating condition. Turn fuel supply off to appliance and DO NOT OPERATE
UNTIL UNSAFE VENTING CONDITION IS INVESTIGATED BY QUALIFIED SERVICE PERSONNEL.
6. Turn thermostat or equipment controls to the "off" position. Verify that the post-purge timer operates the SS2 for several
minutes while burner is not firing before the SS2 turns off. Post-purge adjustment is made by turning the small slotted
screw. Counter clockwise will increase delay, clockwise will decrease delay. NOTE: Overturning adjustment screw will
damage timer and void warranty.
7. Return all windows, doors and exhaust fans to their original conditions of use.
TROUBLESHOOTING OIL ODORS
Many problems can be eliminated quite easily by having the equipment properly set up by a professional oil-heat service contrac-
tor. The sophistication of today's heating equipment and instrumentation needed for efficient operation requires proper training.
There is no substitute for the work of a qualified oil-heat service professional. All troubleshooting recommendations that follow
assume the equipment is installed and maintained by a qualified service person.
Relay/Timer: The factory installed Relay/Timer provides the post purge cycle for the venting system. Just as a chimney continues
to draft after the burner has shut-down, the Relay/Timer operates the SS2 to clear the vent system of residual gases. The duration
of the post-purge cycle is adjustable from 1 to 10 minutes. Turn the adjustment on the Relay/Timer counter-clockwise to accom-
plish a longer post purge. NOTE: Over turning adjustment screw will damage timer and void warranty.
Draft Adjustment: The SS2 Draft Adjustment, located on the rear housing of the SS2 is used for setting up the appliance for
proper draft. See “Draft Adjustment Procedure” on page 12.
Burner Adjustment: Verify that the over-fire draft matches that recommended by the heating equipment manufacturer. Adjust the
combustion efficiency and smoke characteristics to optimum levels of performance. See “Draft Adjustment Procedure” on page 12.
Combustion Air: Modern construction methods and materials have reduced natural air infiltration rates to extremely low levels.
Even older homes can lack adequate air for combustion, when insulation upgrades and other weatherization methods have been
installed. It is recommended that fuel burning appliances have dedicated sources of outside air for combustion. This may be sim-
ply accomplished by running a properly sized duct from outdoors and terminating it near the burner air intake. Accessory air
intakes are available that connect to the burner motor, using it to pull in the outdoor air. The Tjernlund IN-FORCER
TM Combustion
Air Intake tempers the raw outdoor air as it is delivered to the burner. Without a source of outdoor air for combustion, a tight
home's negative pressures will draw odors back through the venting system during the appliance off cycle.
Chronic Oil Odor Conditions: Certain features of the specific appliance and installation, e.g. high heat-retention combustion
chamber; low-mass, dry-base; piping system design; oil impurities; air in lines, can all contribute to an increased production of oil
odor and cannot always be anticipated. For extreme cases of oil odor nuisance Tjernlund recommends the practice of post-purg-
ing the burner during the vent system post-purge. A burner post-purge cycle can eliminate any shortcomings of compatibility
between the specific installation and the SS2. Burner post-purge kits, such as, Tjernlund's P/N 950-2043, are available from most
oil equipment distributors. Burner post-purge kits should be used on installations where the combustion air is being adequately
supplied, yet oil odors continue.
IMPORTANT
Any adjustment to the draft setting must be followed by an over-fire draft measurement and necessary adjustments to the primary
air intake on the burner and barometric draft control. See “Draft Adjustment Procedure” on page 12.