PB Heat MIH manual Troubleshooting Guides

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TROUBLESHOOTING

8. TROUBLESHOOTING

A.SHUT-DOWN CAUSED BY PILOT OUTAGE, BLOCKED VENT SHUT-OFF SWITCH OR FLAME ROLL-OUT SAFETY SHUT-OFF SWITCH

In the event of a shut-down caused by a pilot outage, action of the blocked vent shut-off switch or flame roll- out safety shut-off switch effecting a shut-down of the main burners:

a.Refer to the Lighting/Operating Instructions in Figures 7.4 and 7.5 to properly turn off the gas to the boiler.

b.Turn off all electric power to the boiler.

c.Call a qualified heating service organization or local gas company and have the cause of the shut-down investigated and corrected.

d.Refer to Lighting/Operating Instructions to re-start boiler.

B.TROUBLESHOOTING GUIDES

Use Table 8.1 to assist in determining causes and providing corrective actions to boiler problems. Refer also to Figure 8.1 to troubleshoot the Intermittent Ignition System Control. These guides must be used only by qualified service technicians. These individuals must follow all applicable codes and regulations in repair of any boiler problems.

DANGER

When servicing or replacing items that communicate with the boiler water, be certain that:

There is no pressure on the boiler.

The boiler is not hot.

The power is off.

When servicing the gas valve or pilot, be certain that:

The gas is off.

The electricity is off.

WARNING

Do not use this appliance if any part has been under water. Improper or dangerous operation may result. Immediately call a qualified service technician to inspect the boiler and to replace any part of the control system and any gas control which has been under water.

CAUTION

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

CAUTION

Should overheating occur or the gas supply fail to shut off, do not turn off or disconnect the electrical supply to the pump. This may aggravate the problem and increase the likelihood of boiler damage. Instead, shut off the gas supply at a location external to the appliance.

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Contents Series MI/MIH Table of Contents Using this Manual Installation SequenceSpecial Attention Boxes Clearance from Combustible Construction PreinstallationAccessibility Clearances AIR for Combustion and VentilationAir Openings All Air from Indoors on Different Floors Air Openings All Air from Outdoors through Vertical Ducts Installation Survey Planning the LayoutBoiler SET-UP Water Piping and Controls Boiler Supply and ReturnSafety Relief Valve Parallel Hook-Up with Water ChillerPiping for Zoned Systems Zone Piping with Zone ValvesExpansion Tank INDIRECT-FIRED Water HeaterFreeze Protection Vent Damper Installation General VentingIntegral Draft Hood Vent Piping and Chimney Venting with Vent Damper in Vertical PositionBoiler Removal from Common Venting System Seal any unused openings in the common venting systemGAS Piping Gas Connection to BoilerMIH Boiler Natural Gas Wiring Controls Zoned System WiringElectrical Sequence of Operation Wiring and Connection Diagram Intermittent Ignition Intermittent Ignition System Operating Sequence Zone Wiring with Zone Valves START-UP Procedures Completing the InstallationValve Tapping and Adjustment Screw Locations Operating Instructions For Your Safety Read Before Lighting Adjustment of GAS Pressure Regulator Adjustment of Pilot GAS Flow Control Descriptions CHECK-OUT Procedure Checking Burner InputSTART-UP Procedures Troubleshooting Troubleshooting GuidesProblem Possible Causes Corrective Actions Intermittent Ignition System Troubleshooting Sequence Maintenance Weekly with Boiler in USE GeneralDaily with Boiler in USE Monthly with Boiler in USEAnnually Before Start of Heating Season Standing Pilot and Main Burner FlameBoiler Dimensions & Ratings Series MI/MIH Boiler DimensionsRepair Parts Repair Parts Series MI/MIH GAS Boiler2Manifold Manifold/Gas Train MI Standing Pilot 3b Gas Valve and Pilot Intermittent 4Block/Draft Hood 4a Block/Draft Hood 5Jacket 6Controls/Circulator/Vent Damper Series MI/MIH