Lochinvar 500, 90 service manual Determine unit location, Location of unit

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Installation & Service Manual

1Determine unit location

Location of unit

1.Locate the appliance so that if water connections should leak, water damage will not occur. When such locations cannot be avoided, it is recommended that a suitable drain pan, adequately drained, be installed under the appliance. The pan must not restrict combustion air flow. Under no circumstances is the manufacturer to be held responsible for water damage in connection with this appliance, or any of its components.

2.The appliance must be installed indoors where it is protected from exposure to wind, rain and weather.

3.The appliance must be installed so that the ignition system components are protected from water (dripping, spraying, rain, etc.,) during appliance operation and service (circulator replacement, control replacement, etc.,).

4.Appliances located in a residential garage and in adjacent spaces that open to the garage and are not part of the living space of a dwelling unit must be installed so that all burners and burner ignition devices have a minimum clearance of not less than 18" (46cm) above the floor. The appliance must be located or protected so that it is not subject to physical damage by a moving vehicle.

5.DO NOT install this appliance in any location where gasoline or flammable vapors are likely to be present.

6.All units have been approved for alcove installation (an ALCOVE is a closet enclosure without a front door).

7.The appliance must not be installed on carpet.

8.All units have been approved for use on combustible surfaces.

9.Allow sufficient space for servicing pipe connections, pump and other auxiliary equipment, as well as the appliance.

	NOTICE	Clearances from combustible construction
	NOTICE	are noted on the appliance rating plate.
		are noted on the appliance rating plate.

14 "

TOP

6 "

RIGHT

6 " REAR

24"	24"
FRONT	LEFT

Figure 1-1_Alcove installation, 90,000 - 180,000 Btu/hr

29" TOP

6

" RIGHT

6 "

REAR

	24"	24"
	FRONT
		LEFT

Figure 1-2_Alcove Installation, 225,000 - 500,000 Btu/hr

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Contents Models 90,000 500,000 Btu/hr Contents Please read before proceeding Checking equipmentCodes Ratings Copper-fin =B=R RatingCopper-fin Specifications Copper-fin How it works Gas connection pipeModels CWN270 Front View Model CWN399 Front View 422 Determine unit location Location of unitDetermine boiler location 3Combustion Air Direct from Outside6Combustion Air from Outside Single Opening Minimum Recommended Combustion AIR Supply to Equipment Room Conventional Negative Draft Venting System VentingVent Pipe Sizes Venting Vertical Vent Termination Clearances Less from Ridge From Parapet WallSidewall Venting Masonry Chimney InstallationVent Materials NumberAutomatic Vent Damper 7CB with Vent Damper and Vent Damper Terminal BlockGas Connection Gas connectionsGas Supply Gas Pressure Test Manifold PressureInstall Piping to Control Gas PipingGas Manifold Pressure Adjustment Procedure Clockwise to raise regulator gas pressure, counterclockwiseChecking Gas Supply Pressure 4Gas Supply PressureVenting of Combination Gas Valves Combination Gas ValvesTwo Stage Burner Control System Hydronic piping Water Flow Switch if equippedRelief Valve Minimum Required Flow For Heating Boiler Typical Heating Boiler InstallationsLow Water Cutoff if equipped General Plumbing RulesSystem Temperature Rise Chart Piping of the Boiler SystemWater Connections Heating Boilers Only Heat Exchanger Pressure Drop ChartCirculator Pump Specifications Circulator Pump RequirementsPrimary/Secondary Boiler Piping Three Way Valves Boiler Flow RatesPrimary / Secondary Piping 4Primary / Secondary Piping of a Single BoilerNot to Exceed 4 Pipe DIA or MAX. of 12 Apart 8Multiple Boilers Zoned with Circulators Power Venter Connection to Terminal Strip Terminal Strip WiringBoiler Operating Temperature Control Electrical connectionsPump Wiring for a Heating Boiler Temperature AdjustmentOperating Temperature Control Maximum SET Point Determination Locating Temperature ControlTemperature Control Settings Maximum Set Point DeterminationMulti-Purpose Temperature Sensor Temperature Control SensorsInlet Water Temperature Sensor Outdoor Air Temperature SensorInstallation of a Remote Sensor Boiler Application Outdoor Air Reset OptionInstallation of a Tank Sensor Water Heater Application Additional Temperature Controls Blocked Vent and Flame Roll-Out / Flame Interlock Switch Manual Reset High Water Temperature Limit ControlStart-up Pre-start ChecklistInitial Start-up Lighting Instructions 1Gas Valve 90,000 270,000 Btu/hr ModelsSafety Shutoff Test For Standing Pilot Ignition System To Turn OFF GAS to ApplianceOperating Instructions Freeze Protection Safety Shutoff Test for Spark Ignition Pilot SystemIntermittent Pilot Spark Ignition System F9/M9 To Turn Off Gas to ApplianceWater Treatment Freeze Protection for a Heating Boiler System if requiredDomestic water heaters Required Temperature RiseRequired Temperature Rise Domestic Water Heaters 90,000 500,000 Btu/hr ModelsSoftened Water Systems Water ChemistryPump Operation 1Single water heatersingle tank 2Single water heatermultiple tank 3Multiple water heatersingle tank Minimum Pump Performance Remote Sensor InstallationThermostat Settings Heat Exchanger5Danger Warning Thermal Expansion Water Flow Switch if equippedPressure Only Relief Valve Cathodic ProtectionOwner maintenance Maintenance and annual startupService technician See the User’s Information Manual for instructionsMaintenance Check Expansion Tank Check Relief ValveCombustion Air Adjustment Check All WiringCheck Control Settings Perform Start-up and ChecksHeat Exchanger / Burner Access Inspect and Clean BurnerInspection and Cleaning Procedure Inspection of Heat Exchanger Waterways Pilot Flame Adjustment ProcedureClear Area Water Circulating PumpReview with owner Gas Train and ControlsTroubleshooting Pilot or replace Wiring Diagram F1 Unit DiagramsSchematic Diagram F1 Unit 90,000 270,000 Btu/hr ModelsWiring 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