Lochinvar 2.5, 1.5, 3.5 Viewable and changeable control parameters, Initial Setup, Set Points

Page 18

Service Manual

1 Service

Viewable and changeable control parameters

NOTICE

See Table 1B on pages 13 - 17 of this manual for parameter references listed in this section. The parameter

references listed in this section will not appear on the LCD screen.

 

CAUTION

Before changing parameters, note the

settings so that the unit can be returned to

 

 

its original operating parameters.

A: Initial Setup

Clock and Date

The control uses an internal clock for the night setback feature and for logging of events. For these features to work correctly, the clock must be set when the boiler is first installed or anytime the boiler has been powered off for more than four (4) hours. This parameter must be accessed to set the clock. Parameter A2 sets the date.

NOTICE

The internal clock does not adjust for

Daylight Savings Time and therefore,

 

 

will require a manual adjustment.

Parameters A3 - A12 shown in the Initial Setup Menu are grouped here for convenience. For a detailed explanation of each parameter, reference the specific menu for each parameter.

B: Set Points

Space Heating (SH) Minimum Set Point

The SH minimum set point sets the minimum water temperature set point that can be used for space heating operation. The user or installer will not be able to program the control with a lower SH set point. This parameter can only be changed by the installer by accessing parameter B1.

Space Heating (SH) Maximum Set Point

The SH maximum set point sets the maximum water temperature set point that can be used for space heating. The user or installer will not be able to program the control with a higher SH set point. This parameter can only be changed by the installer by accessing parameter B2.

Space Heating (SH) Set Point

The SH set point sets the water temperature set point used during space heating calls. This parameter can be changed by the installer by accessing parameter B3.

18

SH Offset

The SH offset sets how many degrees above set point the temperature can go before the boiler will shut off. This parameter can only be changed by the installer by accessing parameter B4.

SH Differential

The SH differential sets how many degrees below the offset the temperature has to drop before the boiler turns back on. This parameter can only be changed by the installer by accessing parameter B5.

HWG Tank Set Point

By installing a tank sensor, the SMART TOUCH control can perform the tank thermostat function. The SMART TOUCH control automatically detects the presence of this sensor, and generates a call for heat when the tank temperature drops below the tank set point minus the differential (parameter B7), and finishes the call for heat when the tank temperature reaches tank set point. This parameter can be changed by the installer by accessing parameter B6.

HWG Tank Differential

When a tank sensor is installed, the tank temperature must drop this amount below the tank set point (parameter B6) before the boiler will turn on. The installer can adjust this setting by accessing the parameter B7.

Manual Reset High Limit

The SMART TOUCH control contains an integral Manual Reset High Limit (MRHL) on the outlet of the heat exchanger. Once the outlet temperature exceeds the MRHL set point, the boiler will shut down and lock out. Once the outlet temperature has dropped below this set point, the RESET button on the LCD display must be pressed to clear this lockout. This set point can be adjusted by accessing parameter B8.

Auto Reset High Limit

The SMART TOUCH control contains an integral Auto Reset High Limit (ARHL) on the outlet of the heat exchanger. Once the outlet temperature exceeds the ARHL set point, the boiler will shut down and lock out. Once the outlet temperature has dropped below this set point, the RESET button on the LCD display can be pressed to reset this lockout. If RESET is not pressed, the control will automatically reset the lockout after five (5) minutes. This set point can be adjusted by accessing parameter B9.

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Contents Models 1.5 2.0 2.5 3.0 Contents Please read before proceeding Handling ceramic fiber materialsNiosh stated First Aid When servicing boiler Maintenance What is in this manual?Service TroubleshootingService Boiler pipingHome Screen Smart Control Module Control inputsControl outputs StripHow the boiler operates Access modesGeneral Operation How the control modules operateTo adjust and save parameters reference FIG Sequence of operation Parameter table Sub Parameter Name See Min Max Default User InstallerValue Access MenuDelay Ramp BMS Setup Setback HWG Night Pumps Initial Setup Viewable and changeable control parametersSet Points Outdoor Reset Ramp Delay Advanced Setup SH/HWG Night Setback Cascade Offset ModBusCascade Minimum On/Off TimePumps Service Notification Running Hours Service NotificationService Notification in Months Service Notification CyclesService Cascade Screen 8Cascade ScreenGraph Screen 9Graph ScreenParameter SelectionService History Screen 11History ScreenLockout Faults13History ScreenRuntime History Service Screen 14Service ScreenOwner maintenance Maintenance Maintenance and annual startupService technician See the Crest User’s Information Manual for InstructionsMaintenance Check expansion tank Flue vent system and air pipingCheck water system Check boiler relief valveCheck control settings Check ignition ground wiringCheck all boiler wiring Check flame signalCleaning boiler heat exchanger Review with ownerCheck the following TroubleshootingBefore troubleshooting Check control module fusesTroubleshooting Checking temperature sensors No Pump Low Water Cutoff OpenAnti-cycling Flame FailureIgnition Flame Out Sequence Flame OutRunning Gas Valve / Relay Failure Unit was running and lost the flameHigh Limit Auto ResetManual Reset High Limit OpenFault Description Corrective Action Delta T High Louver Proving Sw OpenFlue Temp High Outlet TempRem Ctrl Flt Service BlkOutlet Temp High Parameters SavedSensor Shorted Switch OpenSensor Open Flue SensorTemperature Burner SupplyDifferential Too Many Resets Try LaterInternal Fault Writing toWrite EEProm Watch Dog ErrorNo Error Stored CRC ParametersOr Obstruction Combustion Analysis ProcedureGas Valve Adjustment Gas Supply PressureGas valve adjustment procedure 2Gas Valve Adjustment Models 1.5Page
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3, 2, 3.5, 2.5, 1.5 specifications

Lochinvar is a leader in manufacturing high-efficiency water heating solutions, and their Lochinvar 1.5, 1.3, and 1.0 models exemplify the company's commitment to innovation and performance. These advanced heating systems are designed to meet the diverse needs of commercial and residential applications, providing reliable hot water while ensuring energy efficiency and environmental sustainability.

The Lochinvar 1.5, 1.3, and 1.0 models incorporate cutting-edge technologies that set them apart from traditional water heaters. One of the most notable features is their use of high-efficiency condensing technology, which extracts maximum heat from the combustion process. This process allows the units to achieve high thermal efficiencies, often exceeding 95%, which not only reduces energy costs but also lowers greenhouse gas emissions.

In terms of design, Lochinvar's models are constructed with durable materials, ensuring longevity and reliability in demanding environments. The stainless steel heat exchanger is a key element that contributes to the durability and performance of the units. This material is resistant to corrosion and scale build-up, enhancing the lifespan of the heater and reducing maintenance requirements.

The Lochinvar 1.5, 1.3, and 1.0 models feature advanced control systems that provide precise temperature management and easy operation. The intuitive digital display allows users to monitor performance metrics, temperature settings, and energy consumption with ease. Additionally, these units are equipped with intelligent modulating gas valves that optimize fuel usage based on demand, ensuring efficient operation across various load conditions.

Safety is a priority in the design of Lochinvar's water heaters. The models come with built-in safety features, including flame failure detection, overheat protection, and venting safeguards. These systems work together to ensure the safe operation of the units, giving users peace of mind.

Another characteristic that makes the Lochinvar 1.5, 1.3, and 1.0 models popular among users is their compact design. These units are engineered to fit in tight spaces, making them ideal for installations where space is at a premium. Despite their small footprint, they deliver powerful performance, ensuring that users have access to the hot water they need.

In summary, Lochinvar's 1.5, 1.3, and 1.0 water heating models represent the pinnacle of efficiency, safety, and reliability. With their advanced technologies, durable construction, and user-friendly features, these units are an excellent choice for anyone seeking a high-performance water heating solution.
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