Lochinvar 45, CP-5M-4/08, 000 - 500 High-Fire Offset, Boiler Application, Water Heater Application

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Set Point

The Set Point knob specifies the target outlet water temperature in degrees, Fahrenheit. After the water temperature reaches the set point, the temperature control shuts off the burners.

Differential

The Differential specifies the number of degrees below the set point that the control will allow the water temperature to drop before it brings the unit back on again.

High-Fire Offset

The temperature control operates a two-stage firing system. The two stages are High-Fire and Low-Fire. High-Fire operates all burners at full rate while Low-Fire operates the burners at approximately one-half rate.

The High-Fire Offset knob specifies the number of degrees below set point that the High-Fire stage shuts down. At that point, the unit will continue to operate at the Low-Fire stage until the set point is reached.

The High-Fire Offset knob has settings between 0°F and 20°F. If set at 0°F, the High-Fire Offset is disabled and the unit will operate the High-Fire stage until the set point is reached and the temperature control shuts the unit off.

No matter what the High-Fire Offset knob is set to, the unit will light at Low Fire and operate for approximately 10 to 120 seconds before the High-Fire stage actuates.

Boiler Application

Standard boiler units are shipped with one sensor, the inlet water temperature sensor. An optional sensor can be purchased and installed for use as a remote system sensor. Boilers with the outdoor air reset option also have an outside air temperature sensor.

Water Heater Application

Water heater units are shipped with two sensors; the inlet water temperature sensor and the multi-purpose temperature sensor to be used as a tank sensor.

Temperature Control Sensors

This is a two-stage temperature control that controls the burner ignition and pump functions. This temperature controller can measure up to three different sensor inputs, depending upon how the unit is set up. They are as follows:

1.Inlet Water Temperature Sensor

2.Multi-Purpose Temperature Sensor

3.Outside Air Temperature Sensor

Inlet Water Temperature Sensor

This sensor measures the inlet water temperature coming into the unit.

The inlet water temperature sensor is placed into the inlet bulbwell on the boiler. This sensor is installed by the factory in new units.

Multi-Purpose Temperature Sensor

Depending upon how your unit is set up, this sensor can be used as a system sensor in a boiler system or a tank sensor

for water heater applications. Connect this sensor to the two blue wires in the upper left-hand corner of the control panel.

Outdoor Air Temperature Sensor

The outside air temperature sensor will only be used for boiler systems. The outside air sensor is optional. This sensor allows you to tie boiler operation to the outdoor air temperature. As outside temperatures drop, the control will increase the temperature setting of the boiler. As outdoor temperatures rise, the control will decrease the temperature to the selected set point of the boiler. You can set the control to shut the boiler off when a desired outdoor air temperature level is reached.

You must purchase the sensor from the appliance manufacturer. The sensor comes with a housing that helps protect the sensor from the elements. Mount the air sensor housing outdoors, under the eve of the roof. Make sure the housing is out of direct sunlight. This will ensure that the sensor will accurately read the true outdoor temperature. Connect the outdoor air temperature sensor to the terminal block on the outdoor air reset board. For more information on wiring the sensor, see Wiring of Remote Sensors, this page.

Installation of Remote Sensors

Make sure to insert the sensor all the way into the bulbwell, leaving no air pocket between the front surface of the sensor and the back of the bulbwell. Air pockets are thermally non-conductive and will cause sensors to read inaccurately.

System Sensor

The system sensor is used for boiler applications. Install the sensor in the system supply to the building.

Tank Sensor

The tank sensor is used in water heating applications. Install the sensor in a water storage tank to measure water temperature. For more information on wiring the sensor, see Wiring of Remote Sensors below.

Wiring of Remote Sensors

To wire remote sensors, follow the guidelines below. Take care to correctly wire sensors to the unit. Erratic temperature readings can be caused by poor wiring practices. Twist the wires between the unit and the remote sensor. Turn wires at least three or four turns per linear foot of wiring. This provides protection against some types of electrical interferences.

1.Do not route temperature sensor wiring with building power wiring.

2.Do not locate temperature sensor wiring next to control contactors.

3.Do not locate temperature sensor wiring near electric motors.

4.Do not locate temperature sensor wiring near welding equipment.

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Contents Warranty Special Instructions to OwnerChecking Equipment Contents User Warning Installation Procedure CodesLocation of Unit Clearances from Combustible Construction Clearance from Combustible ConstructionCombustion Air Through Ducts Openings Table a Minimum Recommended Combustion AIR SupplyConventional Negative Draft Venting System VentingTable B Vent Pipe Sizes Input Btu/hr Flue SizePage Vent Termination from Peaked Roof 10’ or Less from Ridge Venting TerminationInspection of a Masonry Chimney Sidewall Venting Masonry Chimney InstallationVent Damper and Vent Damper Terminal Block Automatic Vent DamperTable C GAS Supply GAS Pressure TestGAS Connection Table D Manifold PressureTable F Fittings to Equivalent Straight Pipe Table G GAS ConnectionsBtu/hr Distance from Meter In Feet GAS Piping Install Piping to ControlWrench GAS Manifold Pressure Adjustment ProcedurePilot Checking GAS Supply PressureVenting of Combination Gas Valves Combination GAS ValvesRelief Valve Water Heater Relief Valve Water Flow Switch if EquippedLOW Water Cutoff if Equipped Minimum Flow Rate Required to Actuate Flow SwitchTWO Stage Burner Control System Table J AMP Draw DataTemperature Control Settings Temperature AdjustmentOperating Temperature Control Locating Temperature ControlInstallation of Remote Sensors Temperature Control SensorsWiring of Remote Sensors High-Fire OffsetAdditional Temperature Controls Outdoor AIR Reset OptionBlocked Vent and Flame ROLL-OUT/FLAME Interlock Switch Manual Reset High Water Temperature LimitInitial START-UP Input for Your Safety Read Before Operating PRE-START ChecklistLighting Instructions for Standing Pilot Models F1 What to do if YOU Smell GASLighting Wand Safety Shutoff Test for Standing Pilot Ignition System To Turn OFF GAS to ApplianceLighting Instructions for Spark Ignition Pilot Models F9/M9 Operating Instructions To Turn OFF GAS to Appliance Safety Shutoff Test for Spark Ignition Pilot SystemFreeze Protection Intermittent Pilot Spark Ignition System F9/M9Freeze Protection for a Heating F9/M9 Intermittent Spark Ignition Pilot ModelsWater Treatment MaintenanceRemoval of Combustion Chamber Lining or Base Panels Inspection Cleaning ProcedureOuter Air Deflector and HEX Filler Bracket Water Connections Heating Boilers only GAS Train and ControlsPiping of the Boiler System Circulator Pump RequirementsCirculator Pump Specifications Table LCirculator Pump Operation Primary/Secondary Piping of a Single Boiler PRIMARY/SECONDARY Boiler PipingLOW Temperature Bypass Requirements Three WAY ValvesBoiler Flow Rates General Plumbing Rules Table M Minimum Required Flow for Heating BoilerTable N Installation with a Chilled Water SystemPower Venter Connection To Terminal Strip Boiler Operating Temperature ControlTable O Terminal Strip Wiring Wire GaugeTable P Required Temperature Rise Required Temperature RiseWater Velocity Control Btu/hr To 7 Grains To 25 Grains HardnessWater Chemistry Softened Water SystemsPump Operation Thermostat Settings Remote Sensor Installation InstructionsMinimum Pump Performance Heat ExchangerOptional Relief Valve Automatic Vent DampersThermal Expansion Cathodic ProtectionDo not plug or cap the relief valve discharge Troubleshooting Guide 90,000 270,000 Btu/hr Models Water Heaters F1 Schematic Diagram F1 Unit Schematic Diagram F9 Unit Schematic Diagram M9 Unit Schematic Diagram F9/M9 Unit Page
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000 Btu/hr, 000 - 500, RSB-i&s-05, 45, CP-5M-4/08 specifications

The Lochinvar 000 BTU/hr, 45,000 - 260 is a high-efficiency water heater designed for residential and commercial applications, showcasing advanced technologies that set it apart in the industry. With a powerful heating capacity of up to 260,000 BTU/hr, this unit is engineered to meet the varying demands of hot water for both large households and businesses.

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