Lochinvar 90, 500 service manual Maintenance

Page 55

Installation & Service Manual

8Maintenance (continued)

￿WARNING

￿WARNING

￿WARNING

Follow the service and maintenance procedures given throughout this manual and in component literature shipped with the appliance. Failure to perform the service and maintenance could result in damage to the appliance or system. Failure to follow the directions in this manual and component literature could result in severe personal injury, death, or substantial property damage.

The appliance should be inspected annually only by a qualified service technician. In addition, the maintenance and care of the appliance designated in Table 8A and explained on the following pages must be performed to assure maximum appliance efficiency and reliability. Failure to service and maintain the appliance and system could result in equipment failure.

Electrical shock hazard – Turn off power to the appliance before any service operation on the appliance except as noted otherwise in this instruction manual. Failure to turn off electrical power could result in electrical shock, causing severe personal injury or death.

￿CAUTION

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

Address reported problems

1.Inspect any problems reported by the owner and correct before proceeding.

Inspect appliance area

1.Verify that appliance area is free of any combustible materials, gasoline and other flammable vapors and liquids.

Inspect appliance interior

1.Remove the outer access panels and inspect the interior of the appliance.

2.Vacuum any sediment from inside the appliance and components. Remove any obstructions.

Check all piping for leaks

Listed below are items that must be checked to ensure safe reliable operation. Verify proper operation after servicing.

Flue vent system

1.Examine the venting system at least once a year. Check more often in the first year to determine inspection interval. Check all joints and pipe connections for tightness, corrosion or deterioration. Clean louvers and/or screens in the combustion air intake system as required. Have the entire system, including the venting system, periodically inspected by a qualified service agency.

Check water system

1.

Verify all system components are correctly installed and

 

operational.

2.

Check the cold fill pressure for the system. Verify it is

 

correct (must be a minimum of 12 PSI).

3.

Watch the system pressure as the boiler heats up (during

 

testing) to ensure pressure does not rise too high. Excessive

 

pressure rise indicates expansion tank sizing or

 

performance problem.

4.

Inspect automatic air vents and air separators. Remove air

 

vent caps and briefly press push valve to flush vent. Replace

￿WARNING

Eliminate all system or appliance leaks. Continual fresh makeup water will reduce appliance life. Minerals can build up in sections, reducing heat transfer, overheating heat exchanger, and causing heat exchanger failure. Leaking water may also cause severe property damage.

caps. Make sure vents do not leak. Replace any leaking

vents.

1.Inspect all water and gas piping and verify to be leak free.

2.Look for signs of leaking lines and correct any problems found.

3.Check gas line using the procedure found in Section 3 - Gas Connections.

55

Page 54 Page 56
Image 55
Page 54 Page 56
Contents Models 90,000 500,000 Btu/hr Contents Checking equipment Please read before proceedingCodes Copper-fin =B=R Rating RatingsCopper-fin Specifications Gas connection pipe Copper-fin How it worksModels CWN270 Front View Model CWN399 Front View 422 Location of unit Determine unit location3Combustion Air Direct from Outside Determine boiler location6Combustion Air from Outside Single Opening Minimum Recommended Combustion AIR Supply to Equipment Room Conventional Negative Draft Venting System VentingVent Pipe Sizes Venting Less from Ridge From Parapet Wall Vertical Vent Termination ClearancesNumber Masonry Chimney InstallationVent Materials Sidewall Venting7CB with Vent Damper and Vent Damper Terminal Block Automatic Vent DamperManifold Pressure Gas connectionsGas Supply Gas Pressure Test Gas ConnectionGas Piping Install Piping to ControlClockwise to raise regulator gas pressure, counterclockwise Gas Manifold Pressure Adjustment Procedure4Gas Supply Pressure Checking Gas Supply PressureVenting of Combination Gas Valves Combination Gas ValvesTwo Stage Burner Control System Hydronic piping Water Flow Switch if equippedRelief Valve General Plumbing Rules Typical Heating Boiler InstallationsLow Water Cutoff if equipped Minimum Required Flow For Heating BoilerPiping of the Boiler System System Temperature Rise ChartCirculator Pump Requirements Heat Exchanger Pressure Drop ChartCirculator Pump Specifications Water Connections Heating Boilers OnlyPrimary/Secondary Boiler Piping Boiler Flow Rates Three Way Valves4Primary / Secondary Piping of a Single Boiler Primary / Secondary PipingNot to Exceed 4 Pipe DIA or MAX. of 12 Apart 8Multiple Boilers Zoned with Circulators Electrical connections Terminal Strip WiringBoiler Operating Temperature Control Power Venter Connection to Terminal StripPump Wiring for a Heating Boiler Temperature AdjustmentOperating Temperature Control Maximum Set Point Determination Locating Temperature ControlTemperature Control Settings Maximum SET Point DeterminationOutdoor Air Temperature Sensor Temperature Control SensorsInlet Water Temperature Sensor Multi-Purpose Temperature SensorInstallation of a Remote Sensor Boiler Application Outdoor Air Reset OptionInstallation of a Tank Sensor Water Heater Application Additional Temperature Controls Manual Reset High Water Temperature Limit Control Blocked Vent and Flame Roll-Out / Flame Interlock SwitchStart-up Pre-start ChecklistInitial Start-up 1Gas Valve 90,000 270,000 Btu/hr Models Lighting InstructionsTo Turn OFF GAS to Appliance Safety Shutoff Test For Standing Pilot Ignition SystemOperating Instructions To Turn Off Gas to Appliance Safety Shutoff Test for Spark Ignition Pilot SystemIntermittent Pilot Spark Ignition System F9/M9 Freeze ProtectionFreeze Protection for a Heating Boiler System if required Water TreatmentDomestic Water Heaters 90,000 500,000 Btu/hr Models Required Temperature RiseRequired Temperature Rise Domestic water heatersSoftened Water Systems Water ChemistryPump Operation 1Single water heatersingle tank 2Single water heatermultiple tank 3Multiple water heatersingle tank Heat Exchanger Remote Sensor InstallationThermostat Settings Minimum Pump Performance5Danger Warning Cathodic Protection Water Flow Switch if equippedPressure Only Relief Valve Thermal ExpansionSee the User’s Information Manual for instructions Maintenance and annual startupService technician Owner maintenanceMaintenance Check Relief Valve Check Expansion TankPerform Start-up and Checks Check All WiringCheck Control Settings Combustion Air AdjustmentHeat Exchanger / Burner Access Inspect and Clean BurnerInspection and Cleaning Procedure Water Circulating Pump Pilot Flame Adjustment ProcedureClear Area Inspection of Heat Exchanger WaterwaysGas Train and Controls Review with ownerTroubleshooting Pilot or replace 90,000 270,000 Btu/hr Models DiagramsSchematic Diagram F1 Unit Wiring Diagram F1 UnitWiring Diagram F9 Unit Schematic Diagram F9 Unit315,000 399,999 Btu/hr Models Diagrams Diagrams Page Revision a ECO #C06290 initial release CFA-I-S Rev a 09/10
Top Page Image Contents