Manuals / Lochinvar / Household Appliance / Boiler

Lochinvar 3.5, 2.5 service manual

Models: 3 2 3.5 2.5

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Revision Notes: Revision A (ECO #C07970) initial release.

Revision B (ECO #C08023) reflects changes made to FIG. 6-3 on page 32 for Mass approval and changes made to FIG. 5-3 on page 28.

Revision C (ECO #C08179) reflects the addition of three (3) new vent manufacturers (pg. 16 - Table 2A).

Revision D (ECO #C08585) reflects edits made to FIG. 4-4 and the addition of Fixed or Variable Flow Primary in place of Full Flow.

Revision E (ECO #C08841) reflects changes made to #3 on page 42 additional information added to the humidity warning on page 7, along with references to the Dual Fuel Supplemental Manual.

Revision F (ECO C09629) reflects the update of the AHRI and ASME logos on page 6 and the update of condensate disposal information and Figure 8-1 on page 39.

Revision G (ECO C10325) reflects a kit number correction (Neutralizer kit) and the addition of version 4, software update (pg. 49).

Revision H (ECO C10391) reflects the change in Label and Wiring diagrams on pages 58 and 59.

Revision I (ECO C11129) reflects changes made to the Ratings (page 6), the Common Venting section, page 18 and (ECR 05455) the addition of #7 in the Before Locating the Boiler section on page 7.

FB-I-O Rev I

08/12

Image 60

Lochinvar 3.5, 2.5 service manual

Contents

Save this manual for future reference Contents When servicing boiler Please read before proceedingCrest How it works BlowersCrest How it works Models 1.5 2.0 2.5 3.0 Ratings Crest Ahri RatingInstallation must comply with Recommended clearances for service accessDetermine boiler location Before locating the boiler, checkProvide air openings to room Flooring and foundationVent and air piping Prevent combustion air contaminationWhen using an existing vent system to install a new boiler Products to avoidAreas likely to have contaminants When removing a boiler from existing common vent system Remove boiler from wood pallet 7Combustion Air from Outside Single Opening Minimum Recommended Combustion AIR Supply to Equipment Room General venting Direct ventingOptional room air Install vent and combustion air piping Air inlet pipe materialsApproved Stainless Steel Vent Manufacturers Make Model Air intake/vent connectionsRemoving from existing vent Common venting Vertical direct venting Vent/air termination verticalDetermine location Prepare roof penetrationsMultiple vent/air terminations 4Alternate Vertical Terminations with Multiple BoilersSidewall direct venting Vent/air termination sidewallPrepare wall penetrations 2Clearance to Doors and WindowsRoom air 4Multiple Vent Terminations must also comply with FigureHydronic piping Circulator sizing Model20F 40F 60F Near boiler piping components Ball Valve Multiple Boilers Common Header Primary / Secondary Flow For all equipment and detailing required by local codes AIR Seperator Drain Port Typical System Supply Sensor Connecting gas supply piping Gas connectionsModel Gas Inlet Size Natural gas Propane GasGAS Piping Size Chart Check inlet gas supplyGas valve replacement Gas PressureField wiring Installation must comply withLine voltage connections Enable Outdoor temperature sensorLouver proving switch Low voltage connectionsAuxiliary switch 1 Alarm contactsWiring of the cascade System supply sensorWiring FieldCondensate disposal Condensate drainFreeze protection when used Start-upCheck/control water chemistry Fill and test water systemCheck for gas leaks Check thermostat circuitsInspect condensate system Inspect/check condensate lines and fittingsFinal checks before starting the boiler Start the boilerIf boiler does not start correctly Check system and boilerFor Your Safety Read Before Operating Set space heating operation Gas Natural Gas Propane ValveVerify HWG circulator mode Set HWG target temperature Configuration of the cascadeSet clock Operating information GeneralProtection features Boiler temperature regulation Outdoor reset operation, if usedCascade Sequence of operation Crest control module Home Screen2Main Menu Screen Maintenance Maintenance and annual startup Service technicianOwner maintenance See the Crest User’s Information Manual for InstructionsMaintenance Flue vent system and air piping Check water systemCheck expansion tank Check boiler relief valveCheck ignition ground wiring Check all boiler wiringCheck control settings Check flame signalCleaning boiler heat exchanger Review with ownerHandling ceramic fiber materials Niosh stated First AidDiagrams Integrated Control2Wiring Diagram