Lochinvar 500, 90 service manual Temperature Adjustment, Pump Wiring for a Heating Boiler

Page 34

5Electrical connections

Pump Wiring for a Heating Boiler

The heating boiler circulating pump must be purchased locally. The maximum load for the pump switched by the internal pump relay must not exceed 1 HP. The current draw for a field installed 120 VAC pump MUST be added to the boiler’s current draw to determine the minimum wire size for 120 volt service.

TABLE - 5B

AMP DRAW DATA FOR

STANDARD FIRING CODES

			Maximum
	Firing Control	Model	Total AMPs /
			120VAC
		CB 315	.5
	M9	CB 360	.5
	M9	CB 399	.5
		CB 399	.5
		CB 500	.5

		CW 90	1.5
		CW 135	1.5
	*F1	CW 180	1.5
	*F1	CW 199	1.5
		CW 199	1.5
		CW 225	1.5
		CW 270	1.5
		CW 315	1.5
	*F9	CW 360	1.5
	*F9	CW 399	1.5
		CW 399	1.5
		CW 500	1.5

*1.0 AMPs added for “PM” water heaters

IGNITION MODULE

TEMPERATURE

CONTROL

PUMP RELAY

MANUAL RESET

HIGH LIMIT (IF EQUIPPED)

TRANSFORMER

INTERMITTENT PILOT SYSTEM M9 CONTROL PANEL

Figure 5-2_Control Panel Assembly 90-135,000 BTU/hr

Installation & Service Manual

TEMPERATURE

CONTROL

IGNITION

MODULE

PUMP

RELAY

MANUAL RESET

HIGH LIMIT (IF EQUIPPED)

TRANSFORMER

Figure 5-3_Intermittent Pilot System 500,000 Btu/hr Control Panel

Temperature Adjustment

Operating Temperature Control

	NOTICE	The temperature controller is pre-set
	NOTICE	at the factory with test settings. You
		at the factory with test settings. You
		may need to adjust the settings to meet
		your specific needs.
		Return water temperatures must not be
	WARNING	Return water temperatures must not be
	WARNING	less than 140°F. If lower return water
		temperatures are required, follow the
		instructions for Low Temperature Bypass
		Requirements or Three-Way Valves, see
		page 29.

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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