Sterling GG-105, GG-90, GG-75, GG-60, GG-45, GG-120, GG-30 Tubular Propeller Troubleshooting Guide

Page 34

Table 9 - Tubular Propeller Troubleshooting Guide

SYMPTOMS

POSSIBLE CAUSE(S)

CORRECTIVE ACTION

 

 

 

A. Flame pops back.

1. Burner orifice incorrect.

1. Check for proper orifice size. Refer to “Operation”.

 

2. Low manifold Pressure.

2. Test and reset manifold pressure.

 

 

 

B. Noisy Flame.

1. Irregular orifice causing whistle or resonance.

1. Replace orifice.

 

2. Excessive gas input.

2. Test and reset manifold pressure.

 

 

 

C. Yellow tip flame (some yellow

1. Clogged burner.

1. Clean main burner ports.

tipping on LP gas is permissible).

2. Misaligned orifice.

2. Align manifold assembly.

 

3. Insufficient combustion air.

3. Clean combustion air inlet openings.

 

4. Possibly over fired.

4. Check gas input and manifold pressures.

 

 

 

D. Floating flame.

1. Blocked venting.

1. Clean Flue. Refer to “Installation”.

 

2. Insufficient combustion air.

2. Clean combustion air inlet openings.

 

3. Blocked heat exchanger.

3. Clean heat exchanger. Refer to “Installation”.

 

4. Air leak into combustion chamber, flue

4. Determine cause and repair accordingly.

 

collector or draft hood.

 

 

 

 

E. Gas odor.

1. Gas pipe leak.

1. Inspect all gas piping and repair.

Shut off gas supply immediately!

2. Leaking gas test port on valve.

2. Check to ensure gas test ports are seated.

 

3. Blocked heat exchanger.

3. Clean heat exchanger/flue.

 

4. Blocked draft hood.

4. Clean flue collector.

 

5. Negative pressure in the building.

5. See “Installation”.

 

 

 

F. Delayed ignition.

1. Improper ground.

1. Check grounding wires and spark bracket

 

 

connections.

 

2. Bad or broken spark cable.

2. Inspect spark cable connections and cuts.

 

3. Faulty control.

3. Check to ensure spark is energized after

 

 

pre purge period.

 

4. Manifold pressure set too low.

4. Test and reset manifold pressure refer to

 

 

“Operations”.

 

5. Main burner orifice dirty.

5. Clean or replace orifice.

 

6. Improper venting.

6. Refer to “Installation”.

 

 

 

G. Failure to ignite.

1. Gas supply is off.

1. Open all manual valves “check for leaks”.

 

2. No power supply to unit.

2. Turn on power supply, check fuses and

 

 

replace if bad.

 

3. Thermostat not calling.

3. Turn up thermostat, Check for 24v on

 

 

terminals R and W1 on terminal strip.

 

4. Defective high limit.

4. Check switch for continuity if open with no

 

 

heat present, replace.

 

5. Defective drafter prove switch.

5. Check switch operation to ensure

 

 

switch closes after draftor purge period.

 

 

If it does not make/check tubing

 

 

connections/blockage.

 

6. Loose wiring.

6. Check all wiring per diagram.

 

7. Improper ground.

7. Check all ground wires and connections.

 

8. Improper thermostat or transformer wiring.

8. Check both, for wiring according to diagram.

 

9. Ignitor defective/damaged.

9. Replace ignitor.

 

10. Misaligned ignitor.

10. Resecure ignitor bracket.

 

11. Defective gas valve.

11. Check for 24V at gas valve terminals during

 

 

trial for ignition period. If present with no

 

 

manifold pressure. Replace valve.

 

12. Blown fuse.

12. Refer to symptom “Q”.

 

 

 

H. Condensation.

1. Improper venting.

1. Refer to “Installation, Venting”.

 

2. Unit under fired.

2. Check gas supply pressures to unit. Refer

 

 

to “Installation”.

 

3. Building too cold.

3. Refer to “Installation”.

 

 

 

34

Image 34
Contents Tubular GAS Fired Direct Spark Propeller Unit Heaters Receiving InstructionsTable of Contents DescriptionGeneral Safety Information Performance DATA† Page Installation Installation Pipe Sizing GAS PipingGas Pipe Size Pipe Installation Gas Piping RequirementsThermostat Wiring and Location Electrical ConnectionsElectrical Connections Electrical Connections Electrical Connections Electrical Connections Electrical Connections Venting Additional Requirements for Canadian InstallationsVenting into an unlined masonry chimney is prohibited Venting General Guidelines Venting CategoriesStandard Combustion Vertically VENTED, Category I FigureCategory I Horizontal Venting Requirements Vent Support Horizontally VENTED, Category III Figure Vertically VENTED, Category III Type B Draft Hood Connector Venting Venting Carbon Monoxide Separarted Combustion Installation Venting CategoryCombustion AIR Venting and Piping Exhaust VentingConcentric Vent Box Dimensions Separated CombustionConcentric Vent Installation Horizontal Intake/Vent Installation Vertical Termination AIR Inlet CollarExhaust AIR Collar Horizontal TerminationExplanation of Controls See Figure OperationShut Down Main Burner Orifice Schedule Primary AIR Shutter AdjustmentGAS Input Rate Tubular Unit Heater High Altitude DerationPeriodic Service Never over oil the motor or premature failure may occurTubular Propeller Troubleshooting Guide Symptoms Possible Causes Corrective ActionRealign power venter wheel Check operation of switch, did the switch LED Status Indicates CHECK/REPAIR Pattern Status CHECK/REPAIR ItemDescription Propeller Parts HOW to Order Replacement Parts 5 Capacity CA 14, 15 + Accessories ASUnit Type UT Supply Voltage SVPRE-INSPECTION Information With power and gas offWith power and gas on GeneralHvac Products