Lochinvar 3.5, 2.5 Verify HWG circulator mode Set HWG target temperature, Set clock

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9 Start-up(continued)

Set Hot Water Generator (HWG) operation

Verify HWG circulator mode

The HWG Mode is programmed to heat an indirect hot water tank. When a tank thermostat or a tank sensor initiates a call for heat, the SMART TOUCH control will turn on the HW pump and turn off the boiler pump (if running). If the system pump is running, it will remain on. When the HW call for heat ends, and there is no space heating call for heat, the HW pump will continue to run for a period of time. This pump delay is set at the factory to 60 seconds. If a shorter or longer delay is desired, the appropriate parameter in the control must be changed. See the Crest Service Manual for a detailed explanation of this procedure. If there is an active space heating call for heat, then the boiler pump will be turned on and the HW pump will be turned off.

Set HWG target temperature

When in the HWG Mode, the control will modulate to maintain the outlet temperature to a set point. This set point is set at the factory to 180°F. If a different set point is desired, the appropriate parameter in the control must be changed. See the Crest Service manual for a detailed explanation of this procedure.

If a tank sensor is installed, the HWG heat demand will start when the tank temperature drops 6°F below the tank set point, and stop when the tank temperature reaches the tank set point. The tank set point is set at the factory to 120°F (49°C).

Set clock

Press the following buttons to program the clock:

>>>>

After pressing SETUP, the Password Screen will appear. Entering the correct password will allow access to all Installer Level adjustable parameters. Press ENTER without a password to access the User Level parameters.

The SMART TOUCH control has a built-in clock that it uses for its night setback feature and for logging events. This clock must be set when the boiler is installed, and anytime the boiler has been powered off for more than one day. Use the following procedure to set the clock:

1.To set the clock, highlight Clock using the arrows and press the SELECT button. Use the left and right arrows to select hours, minutes, AM/PM and the up and down arrows to set.

2.To set the date, highlight Date using the arrows and press the SELECT button. Use the left and right arrows to select the day of the week and the up and down arrows to set.

Installation & Operation Manual

NOTICE

The internal clock does not adjust for

Daylight Savings Time and therefore, will

 

 

require a manual adjustment.

Configuration of the cascade

When installed in a Cascade system, the individual controls must be programmed for cascade operation. To program the cascade parameters, access the Cascade Menu found in the Setup Menu by pressing the following buttons:

>> >> >>

After pressing SETUP, the correct installer password MUST BE entered.

1.Once in the Cascade Setup Menu select the appropriate parameter using the arrows and press the SELECT button.

2.The description of the selected parameter and its current setting will appear at the bottom of the screen.

3.To adjust the parameter, press the + or - buttons to change the value being displayed.

4.Make the correct adjustments and then press the SAVE button.

5.Once all the parameters have been adjusted press the BACK button. This will return you to the Cascade Screen.

Note: The SAVE button must be pressed to ensure proper programming of the controls. Failure to press the SAVE button will require all changes to be reprogrammed.

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Contents Save this manual for future reference Contents Please read before proceeding When servicing boilerBlowers Crest How it worksCrest How it works Models 1.5 2.0 2.5 3.0 Crest Ahri Rating RatingsRecommended clearances for service access Installation must comply withDetermine boiler location Before locating the boiler, checkFlooring and foundation Provide air openings to roomVent 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 Air inlet pipe materials Install vent and combustion air pipingAir intake/vent connections Approved Stainless Steel Vent Manufacturers Make ModelRemoving from existing vent Common venting Vent/air termination vertical Vertical direct ventingDetermine location Prepare roof penetrations4Alternate Vertical Terminations with Multiple Boilers Multiple vent/air terminationsVent/air termination sidewall Sidewall direct venting2Clearance to Doors and Windows Prepare wall penetrations4Multiple Vent Terminations must also comply with Figure Room airHydronic 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 Propane Gas Natural gasCheck inlet gas supply GAS Piping Size ChartGas Pressure Gas valve replacementField wiring Installation must comply withLine voltage connections Outdoor temperature sensor EnableLouver proving switch Low voltage connectionsAlarm contacts Auxiliary switch 1Wiring of the cascade System supply sensorField WiringCondensate drain Condensate disposalStart-up Freeze protection when usedCheck/control water chemistry Fill and test water systemCheck thermostat circuits Check for gas leaksInspect condensate system Inspect/check condensate lines and fittingsStart the boiler Final checks before starting the boilerIf boiler does not start correctly Check system and boilerFor Your Safety Read Before Operating Gas Natural Gas Propane Valve Set space heating operationVerify HWG circulator mode Set HWG target temperature Configuration of the cascadeSet clock General Operating informationProtection features Outdoor reset operation, if used Boiler temperature regulationCascade Sequence of operation Home Screen Crest control module2Main Menu Screen Service technician Maintenance Maintenance and annual startupOwner maintenance See the Crest User’s Information Manual for InstructionsMaintenance Check water system Flue vent system and air pipingCheck expansion tank Check boiler relief valveCheck all boiler wiring Check ignition ground wiringCheck control settings Check flame signalReview with owner Cleaning boiler heat exchangerHandling ceramic fiber materials Niosh stated First AidIntegrated Control Diagrams2Wiring Diagram
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3, 2, 3.5, 2.5 specifications

The Lochinvar 2, 3, 3.5, and 2.5 models are a standout lineup in the realm of commercial and residential water heating solutions. Known for their advanced technology and high efficiency, these units cater to a wide range of applications, ensuring optimal performance and reliability.

One of the key features of the Lochinvar models is their robust construction. Each unit is designed to withstand rigorous operational demands while providing excellent thermal efficiency. They are equipped with stainless steel heat exchangers, which offer superior resistance to corrosion and extend the lifespan of the equipment. This durability is essential for both commercial and residential settings where demand can vary significantly.

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In summary, the Lochinvar 2, 3, 3.5, and 2.5 models define modern water heating technology with their combination of durability, efficiency, and advanced features. With their innovative design and user-friendly controls, they meet the demanding needs of both commercial and residential users, making them a top choice in the water heater market. Whether for new installations or replacements, these units deliver reliable performance and value.
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