Manuals / Lochinvar / Household Appliance / Boiler

Lochinvar 000 Btu/hr, 45 3Gas connections, Venting of Combination Gas Valves, 5 M9Gas Valve

Models: 000 Btu/hr 45

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Combination Gas Valves

3Gas connections

Combination Gas Valves

Installation & Service Manual

Venting of Combination Gas Valves

PRESSURE REGULATOR

ADJUSTMENT

WIRING TERMINALS

(UNDER CAP SCREW)

INLET PRESSURE TAP

SGACONTROL KNOB

OUTLET

PRESSURE TAP

PILOT OUTLET

The combination gas valve regulator used on all models is equipped with an integral vent limiting orifice. The vent limiter ensures that the volume of gas emitted from the valve does not exceed the maximum safe leakage rate allowed by agency requirements. Combination gas valve/regulators equipped with integral vent limiters are not required to have vent or relief lines piped to the outdoors. A dust cap is provided at the vent termination point on the valve to prevent blockage of the vent limiter by foreign material. The combination gas valve regulator with an integral vent limiter complies with the safety code requirements of CSD-1, CF-190(a) as shipped from

Figure 3-5_M9 Gas Valve

Each unit has a combination gas valve to control the gas supply to the burners. The combination valve consists of a gas regulator and two valve seats to meet the requirements for redundant gas valves. The valve has a gas control knob that must remain in the open position at all times when the appliance is in service. Each gas valve has pressure taps located on the inlet and outlet sides. Manifold pressure is adjusted using the regulator located on the valve. The manifold pressure is preset at the factory and adjustment is not usually required. If the manifold pressure is to be adjusted, follow the “Gas Manifold Pressure Adjustment Procedure”, page 20 for proper adjustment.

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the manufacturer without the installation of additional vent lines.

Two Stage Burner Control System

The 45,000 thru 260,000 Btu/hr boilers (M9) are equipped with a two stage burner control system.

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Lochinvar 000 Btu/hr, 45, 000 - 260 service manual 3Gas connections, Venting of Combination Gas Valves, 5 M9Gas Valve

Contents

SBR-I-SRev A Models 45,000 - 260,000 Btu/hrSave this manual for future reference DANGER Hazard definitionsContents What to do if you smell gas WarrantyPlease read before proceeding Checking equipmentCodes Please read before proceedingOther Specifications RatingsSolution Boiler I=B=R Rating Figure A High Altitude Label LocationThe Solution - How it works Models 45,000 - 90,000 Rear View The Solution - How it works... continuedModels 45,000 - 90,000 Btu/hr Front View Models 45,000 - 90,000 Right Side inside unitModels 135,000 - 260,000 Btu/hr Rear View The Solution - How it worksModels 135,000 - 260,000 Btu/hr Front View 10 171Determine boiler location Location of unitFigure 1-4 CombustionAir Through Ducts 1Determine boiler locationFigure 1-3 CombustionAir Direct from Outside Figure 1-5 CombustionAir from Interior Space1Determine boiler location continued AIR SUPPLY TO EQUIPMENT ROOM TABLE - 1B MINIMUM RECOMMENDED COMBUSTION1Determine boiler location A Conventional Negative Draft Venting System 2VentingTABLE - 2A VENT PIPE SIZES 2Venting Locate appliance as close as possible to a chimney or gas ventLess from Ridge Vertical Vent Termination ClearancesFigure 2-2 VentTermination from Peaked Roof 10 or from Parapet WallTABLE - 2B VENT MATERIALS Masonry Chimney InstallationSidewall Venting - Negative Draft Fan Assisted VentingAutomatic Vent Damper ProtectionGas Pressure Test 3Gas connectionsGas Supply Gas ConnectionTABLE - 3E 3Gas connections continuedGas Piping Install Piping to Control3Gas connections Gas Manifold Pressure Adjustment ProcedureFigure 3-3 ManifoldPressure Adjustment Figure 3-2 Wrench3Gas connections continued Checking Gas Supply PressureFigure 3-4 GasSupply Pressure Venting of Combination Gas Valves Combination Gas Valves3Gas connections Figure 3-5 M9Gas ValveRelief Valve Water Flow Switch if equipped4Water connections Figure 4-2 WaterFlow Switch - Top ConnectionsTABLE - 4A MINIMUM REQUIRED FLOW Typical Heating Boiler InstallationsLow Water Cutoff if equipped FOR HEATING BOILERTABLE - 4B SYSTEM TEMPERATURE RISE CHART 4Water connections continuedPiping of the Boiler System Based on Boiler Output in Btu/hrCirculator Pump Requirements TABLE - 4C HEAT EXCHANGER PRESSURE DROP CHARTWater Connections 4Water connectionsCirculator Pump Operation Circulator Pump SpecificationsPrimary/Secondary Boiler Piping PERFORMANCE LOOPLow Temperature Bypass Requirements Primary/Secondary Boiler Piping continuedFull Flow Application Boiler Flow Rates4Water connections continued Primary / Secondary PipingSOLUTION BOILER MAKE UP WATERPrimary / Secondary Piping SOLUTION BOILER4Water connections MAKE UP WATERFigure 4-6 MultipleBoilers Zoned with Circulators 4Water connections continuedPrimary / Secondary Piping ZONE #14Water connections Full System FlowSOLUTION BOILER Figure 4-7 SingleBoiler Full System FlowFull System Flow SOLUTION BOILER4Water connections continued MAKE UP WATERBoiler Operating Temperature Control 5Electrical connectionsTABLE - 5A TERMINAL STRIP WIRING Auxiliary Device Connection to Terminal StripTemperature Control Settings Temperature AdjustmentPump Wiring for a Heating Boiler 5Electrical connections continued5Electrical connections TABLE - 5C MAXIMUM SET POINT DETERMINATIONMaximum Set Point Determination Set PointFigure 5-4 Installationof Remote Sensors Wiring of Remote SensorsInstallation of Remote Sensors 5Electrical connections continuedFigure 5-5 OptionalOutdoor Air Reset Control Outdoor Air Reset OptionAdditional Temperature Controls Figure 5-6 OutdoorAir Control Example Chart5Electrical connections continued Figure 5-7 BlockedVent Switch LocationBLOCKED VENT SWITCH INVERTED TO SHOW RESET UNDERNEATH DRAFT HOOD6Start-up FOR YOUR SAFETY READ BEFORE OPERATINGPre-startChecklist Initial Start-upOperating Instructions To Turn Off Gas to ApplianceWater Treatment Intermittent Pilot Spark Ignition SystemFreeze Protection Ignition and Control TimingsOwner maintenance 7Maintenance Maintenance and annual startupService technician see the following pages for instructionsFlue vent system and air supply 7MaintenanceAddress reported problems Inspect appliance areaCheck Expansion Tank 7Maintenance continuedCheck Relief Valve Heat Exchanger / Burner Access Check All WiringCheck Control Settings Perform Start-upand Checks7Maintenance continued Inspection and CleaningBreathing Fresh air Gas Train and Controls Review with ownerInspection of Heat Exchanger Waterways Water Circulating PumpStep 8TroubleshootingTroubleshooting Guide M9 Solution Boilers StepWiring Diagram - M9 9 DiagramsSchematic Diagram - M9 Unit 45,000 - 260,000 Btu/hr ModelsPage Revision A ECO #C03746 initial release SBR-I-SRev A 5/10