Tjernlund SS2 SideShot with UC1 Universal Control (Version X.02) 8504105 Rev 07/02 - Manual (Page 20)

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Yes, LED #1 (Amber) is lit: Verify Prover safety circuit fault does not exist. See LED indicator light status & faults, on page 18.
If faults exist check Prover P1 & P2 safety circuit.
If no faults exist, check for 115 VAC across terminals N and MTR.
Voltage present: Replace SS2 motor, p/n 950-0015 or SS2 cooling fan, p/n 950-0020.
No voltage present: Replace UC1 circuit board part number 950-8801
SYMPTOM 3: SS2 OPERATES, BUT BURNER DOES NOT
NOTE: Prover status check must be activated, see page 5. For any newly established call for heat the SS2 will run for 60 sec-
onds to try to close the fan prover circuit (P1 to P2). If circuit can not be made after 60 seconds LED's 4 & 5 (Red) will flash in uni-
son, indicating a prover check circuit fault on SS2 start up. The SS2 will shut down and LED's 4 & 5 (Red) will flash in unison, indi-
cating a prover check circuit fault on SS2 start up. NOTE: If primary control of oil burner locks out during the 1 minute period the
UC1 safety circuit and LED’s 4 & 5 will be reset. If the fan prover makes on start up, but breaks for more than 10 seconds during
the burner cycle, LED's 4 & 5 (Red) will flash in unison indicating a prover circuit fault. The SS2 will continue to run for 10 minutes
to try to make the prover circuit as long as a call for heat exists. After 10 minutes the SS2 will shut down and LED's 4 & 5 (Red)
will flash in unison indicating a prover circuit fault. Remove the call for heat and then reestablish to reset the UC1 prover safety
circuit (P1 to P2) & LED’s.
Verify that LED #2 (Green) is lit.
Yes, LED #2 (Green) is lit: Verify that "call jumper" is connected from J1 to J2 on UC1 circuit board. With call for heat established,
verify that wiring is correct by measuring voltage between terminals 1 & 2 and 2 & 4 of UC1 terminal strip. Voltage should be the
same in both cases, if not rewire per appropriate diagram.
No, LED #2 (Green) is not lit: Remove call for heat and reestablish a call for heat to reset control. Within 1 minute of call for heat,
carefully jump a wire between P1 & P2 on UC1 control. LED #2 (Green) should light.
No, LED #2 (Green) does not light: Replace UC1 circuit board, part number 950-8801.
Yes, LED #2 (Green) lights up: Remove supply power to UC1. Remove Jumper from P1 & P2. The SS2 high limit is open, the fan
proving switch is not closing, or wiring connections are incorrect/broken. Disrupt call for heat. Push reset button on SS2 high limit
behind access cover underneath SS2 draft adjustment knob. NOTE: Insufficient post-purge may cause limit to trip. If the limit
switch trips, verify that the post-purge setting is long enough to remove residual heat from the combustion chamber. Verify that the
cooling fan operates whenever the SS2 is running. If high limit trips repeatedly, do not operate the heater until the source of
excessive heat has been determined and repaired. If high limit will not reset and has an open circuit, replace high limit part
number 950-0018.
Verify fan proving switch sensing tube is clear and not crimped. Remove two fan prover switch retaining screws, disconnect sens-
ing tube from the proving switch and connect sensing tube to draft gauge. Initiate call for heat. With SS2 running, verify that venter
performance is sufficient to close fan prover. Draft gauge should read a minimum of -0.40" w.c.
No, measured draft is less than -0.40" w.c.: Verify that SS2 damper is completely open and visually inspect system for blockages.
Confirm that maximum BTU/hr. input and vent pipe lengths are not exceeded. See “Application Table” on page 1 for capacities.
Yes, measured draft is at least -0.40" w.c.: Replace fan proving switch, (Old style exterior junction box mounted, p/n 950-0016)
(New style interior junction box mounted, p/n 950-0029).
MAINTENANCE
INSTALLER AND USER REQUIREMENTS
• Installer must visually inspect unit annually.
• On oil, installer must verify over-fire draft, CO 2 and smoke readings are all correct. See “Draft Adjustment Procedure” on page 16.
• Inspect vent pipe for evidence of corrosion. If any corrosion is found replace vent pipe and inspect venter.
IMPELLER INSPECTION
We recommend that the SS2 impeller be inspected annually. Improper oil burner adjustment can cause excessive particulate
build up over time and impair venter performance. NOTE: See “SS2 Terminology” on page 3 for isometric diagram when follow-
ing impeller inspection procedure.
NOTE: The following inspection procedure should be done when SS2 is mounted. Use care so hardware is not lost.
1. To examine impeller, remove vent pipe and SS2 inlet pipe by twisting counter clockwise.
2. Remove (7) screws which hold cover plate to vent cabinet.
3. Remove flexible tubing from fan prover sensing tube and remove (8) nuts which hold inlet assembly to venter housing.