Lochinvar 260000, 45000 service manual Checking Gas Supply Pressure, 4Gas Supply Pressure

Page 21

Installation & Service Manual

3Gas connections (continued)

Checking Gas Supply Pressure

GAS SUPPLY PRESSURE

MANOMETER

GAS VALVE

Figure 3-4_Gas Supply Pressure

1.

Turn the power “OFF” at the main disconnect

 

switch.

2.

Turn gas valve control knob to the “OFF” position.

3.

Shut off gas supply at the manual valve in the gas piping

 

to the appliance. If fuel supply is L.P. gas, shut off gas

 

supply at the tank.

4.

Remove the 1/8" hex plug, located on the “inlet” side of

 

the gas valve and install a fitting suitable to connect to a

 

manometer or magnahelic gauge. Range of scale should

 

be 14" w.c. or greater to check inlet pressure. See

 

FIG.’s 3-3 and 3-4 for location.

8.Set the thermostat(s) to call for heat.

9.Observe the gas supply pressure with all burners firing. Ensure inlet pressure is within specified range. Check gas supply pressure with all other gas fired appliances in operation to ensure proper gas volume during periods of peak gas usage.

10.If gas pressure is out of range, contact gas utility, gas supplier, qualified installer or service agency to determine necessary steps to provide proper gas pressure to the control.

11.If the gas supply pressure is within the specified range, proceed with the following steps to return the appliance to service.

12.Turn the power “OFF” at the main disconnect switch.

13.Turn gas valve control knob to “OFF” position.

14.Shut off gas supply at the manual valve in the gas piping to the appliance. If fuel supply is L.P. Gas, shut off gas supply at the tank.

15.Remove the manometer and related fittings from the “inlet” side of the gas valve, replace 1/8" hex plug in gas valve.

16.Turn on gas supply at the manual valve, turn on L.P. Gas at tank if required.

17.Turn the power “ON” at the main disconnect switch.

18.Turn the gas valve control knob to the “ON” position. Spark ignition models will automatically light the pilot on a call for heat.

19.Set the thermostat to call for heat. The appliance is now ready to operate.

5.

Turn on gas supply at the manual valve, turn on L.P. gas

 

at tank if required.

6.

Turn the power “ON” at the main disconnect switch.

7.

Follow the “Lighting Instructions” in Section 6 - Startup

 

to light the pilot . Turn gas valve control knob to the

 

“ON” position.

IMPORTANT

Upon completion of any testing on the gas system, leak test all gas connections with a soap solution while main burners are operating. Immediately repair any leak found in the gas train or related components. Do Not operate an appliance with a leak in the gas train, valves or related piping.

Check burner performance by cycling the system while you observe burner response. Burners should ignite promptly. Flame pattern should be stable, see the “Maintenance Section - Normal Flame Pattern”. Turn system off and allow burners to cool, then cycle burners again to ensure proper ignition and flame characteristics.

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Contents Models 45,000 260,000 Btu/hr Contents Please read before proceeding WarrantyCodes Ratings Solution Boiler =B=R RatingTemperature and pressure gauge Solution How it worksSolution How it works Solution How it works Location of unit Determine boiler location3Combustion Air Direct from Outside 6Combustion Air from Outside Single Opening Minimum Recommended Combustion AIR Supply to Equipment Room Venting Conventional Negative Draft Venting SystemVent Pipe Sizes Venting Less from Ridge From Parapet Wall Vertical Vent Termination ClearancesSidewall Venting Negative Draft Masonry Chimney InstallationVent Materials Fan Assisted Venting7Vent Damper and Vent Damper Terminal Block Automatic Vent DamperGas connections Gas Supply Gas Pressure TestGas Connection Gas Piping Install Piping to Control2Wrench Gas Manifold Pressure Adjustment Procedure4Gas Supply Pressure Checking Gas Supply PressureCombination Gas Valves Venting of Combination Gas ValvesTwo Stage Burner Control System Water Flow Switch if equipped Water connectionsRelief Valve Low Water Cutoff if equipped Typical Heating Boiler InstallationsMinimum Required Flow For Heating Boiler General Plumbing RulesPiping of the Boiler System System Temperature Rise ChartHeat Exchanger Pressure Drop Chart Water ConnectionsCirculator Pump Requirements Circulator Pump Specifications Primary/Secondary Boiler PipingCirculator Pump Operation Low Temperature Bypass Requirements Full Flow ApplicationBoiler Flow Rates Make UP Water Primary / Secondary PipingMake UP Water 6Multiple Boilers Zoned with Circulators From System Full System Flow8Single Boiler Full System Flow with Low Temperature Bypass Boiler Operating Temperature Control Terminal Strip WiringElectrical connections Auxiliary Device Connection to Terminal StripAMP Draw Data Temperature AdjustmentMaximum Set Point Determination Maximum SET Point DeterminationOutdoor Air Temperature Sensor Wiring of Remote SensorsInstallation of Remote Sensors Additional Temperature Controls Outdoor Air Reset Option7Blocked Vent Switch Location Blocked Vent and Flame Roll-Out / Flame Interlock SwitchStart-up Pre-start ChecklistInitial Start-up Lighting Instructions for Spark Ignition Pilot ModelsSafety Shutoff Test for Spark Ignition Pilot System Operating InstructionsTo Turn Off Gas to Appliance Freeze Protection Intermittent Pilot Spark Ignition SystemWater Treatment Ignition and Control TimingsService technician Maintenance Maintenance and annual startupOwner maintenance See the User’s Information Manual for instructionsMaintenance Check Relief Valve Check Expansion TankCheck Control Settings Check All WiringHeat Exchanger / Burner Access Perform Start-up and ChecksBreathing Fresh air Inspection and CleaningInspection of Heat Exchanger Waterways Review with ownerGas Train and Controls Water Circulating PumpTroubleshooting Guide M9 Solution Boilers TroubleshootingSchematic Diagram M9 Unit DiagramsWiring Diagram M9 Unit 45,000 260,000 Btu/hr Models 45,000 260,000 Btu/hr Models
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