Lochinvar 1.5, 1.3 SH off-ondifferential SH off/on df, Offset HW setpoint to end HW demand

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SH off-on differential (SH off/on df)

PC Program Instructions

6Parameters

SH off-on differential (SH off/on df)

The SH Off-on Differential sets how many degrees below the turn-off temperature the outlet temperature has to go before the boiler will turn on. This parameter can be changed by accessing parameter 4AE. The temperature range of this parameter is 0°F to 86°F. The default value is 20°F.

Drop of inlet temp before ending anti-cycling (Drop in inlet)

The control will bypass the anti-cycling time if the inlet water temperature drops too much. The control will use the inlet water temperature when it shuts off as the starting point. If the temperature drops this amount below the starting temperature, the control will abort anti-cycling and allow the boiler to fire. This parameter can be changed by accessing parameter 4AF. The temperature range of this parameter is 0°F to 86°F. The default value is 10°F.

Offset HW setpoint to end HW demand

When heating an indirect hot water tank (heat maker), the tank temperature (or inlet temperature if a tank sensor is not used) must rise above the tank setpoint (parameter 4AS) by this amount before the HW heat demand will end. This parameter can be changed by accessing parameter 4AG. The temperature range of this parameter is 0° to 54°F (30°C). The default setting is 0°.

Outdoor air shutdown temp (Out SD Setp)

When the outdoor air temperature rises above this point, the control will inhibit all SH demands (HW demands will still be active). This parameter can be changed by accessing parameter 4AH. The temperature range of this parameter is 0°F to 120°F (99°C). The default value is 80°F (27°C).

OA shutdown differential (Out SD df)

This is the number of degrees below parameter 4AH the outdoor air temperature must go before the boiler will again respond to an SH demand. This parameter can be changed by accessing parameter 4AI. The temperature range of this parameter is 0°F to 90°F (50°C). The default value is 10°F (5°C).

Shift OA reset curve (Shift Air Reset)

The Shift Heat Curve shifts the actual setpoint above or below the calculated setpoint by the number of degrees in this parameter. This parameter can be changed by accessing parameter 4AJ. The temperature range of this parameter is -27°F (-15°C) to 27°F (15°C). The default value is 0°. This feature will be active if this parameter is set to anything other than 0°.

Night setback temperature (NSB Setp)

Once the internal clock has been set correctly, the night setback feature can be used to program a lower water temperature setpoint for space heating. This parameter can be changed by accessing parameter 4AK. The temperature range for this parameter is 32°F (0°C) to 140°F (60°C). With a setting of 32°F (0°C) the feature is turned off. The default value will be 32°F (0°C).

SH turn-off differential cascade (Casc off df)

The SH turn-off differential cascade sets how many degrees above the SH setpoint the system temperature has to go before the boiler will shut off. This parameter can be changed by accessing parameter 4AL. The temperature range of this parameter is 0°F to 72°F (40°C). The default setting is 10°F (5°C).

SH off-on differential cascade (Casc off/on df)

The SH off-on differential cascade sets how many degrees below the turn-off temperature the system temperature has to go before the boiler will turn back on. This parameter can be changed by accessing parameter 4AM. The temperature range of this parameter is 0°F to 72°F (40°C). The default setting is 20°F (10°C).

SH anti-cycling time (Anti-C t)

Once a SH demand has been satisfied, a set amount of time must elapse before the control will respond to a new SH demand. This helps prevent short cycling of the boiler. The control will inhibit the new heat demand and “Anti-cycling” will be shown on the display, until either this time has elapsed or the water temperature drops below parameter 4AF. This parameter can be changed by accessing parameter 4AO. The time range for this parameter is 0 minutes to 40 minutes. The default value is 1 minute.

Max service time (Max Serv t)

The service mode allows the installer to set the unit to a fixed firing rate for the purpose of combustion analysis. The delay sets the length of time the boiler will stay in the service mode if no keys have been pressed before going back to its original state. This parameter can be changed by accessing parameter 4AP. The time range of this parameter is 0 minutes to 40 minutes. The default value is 20 minutes.

Tank setpoint temp

This setting is applied to the tank sensor (when connected). It is used to start and stop the HW call for heat. This setting can be changed by accessing parameter 4AS. The temperature range is 60°F (15.5°C) to 190°F (87.5°C). The default setting is 120°F (49°C).

Offset HW setpoint to end HW demand 14 Outdoor air shutdown temp (Out SD Setp)

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Contents Save this manual for future reference ModelsSYNC - PCP Rev A PC PROGRAM INSTRUCTIONS FOR THE SYNCContents USB installation 1InstallationProgram installation Program setupFigure 1-1 SMART TOUCH PC Main Screen Figure 1-3 Password WindowStarting the program Figure 1-2 Sitecs937Lab Main ScreenPC Program Instructions 2Status ScreenFigure 2-1 SMART TOUCH Status Screen PC Program Instructions Figure 2-1 continued2Status Screen PC Program Instructions 3Graphics ScreenFigure 3-1 SMART TOUCH Graphics Screen PC Program Instructions 4Fault History ScreenFigure 4-1 Fault History Screen PC Program Instructions 5Cascade ScreenFigure 5-1 Cascade Screen Parameter information screens Set 1 System Setup Set 2 Functional Data6Parameters Set 4 Menu Values6Parameters continued Set 1 System setupRamp delay settings Changeable parametersBlock time Switch On/Off 2nd burner HW Block time switching boiler onBlock time switching boiler on/off Set 2 Functional DataFigure 6-6 Parameter Set 4A Set 4 Menu valuesFigure 6-5 Parameter Set 2E Space Heating SH user setpoint User SetpSH off-ondifferential SH off/on df Shift OA reset curve Shift Air ResetMax service time Max Serv t Offset HW setpoint to end HW demandConfig SH control Time to switch between HW and SH SH/HW sw timCascade max SH step power based Max outl temp Tank differential tempReload short time ModBus out of order CascadeMaster controlled through ModBus Demand conf Figure 6-8 Parameter Set 4DBurner cycles for service reminder Serv Not cycl No. of months for service reminder Serv Not timeRunning hours for service reminder Serv NotRun h Figure 6-10 Parameter Set 4FBMS Power at max voltage BMS mod @maxV Figure 6-11 Outdoor Air Reset CurveBMS Power at min voltage BMS mod @minV Figure 6-12 Parameter Set 4GBMS Demand Enable 1 Voltage BMS Voltage at min power BMS V @min modBMS Voltage at max power BMS V @max mod Storing parameters on your PCRevision Notes Revision A initial release
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1.5, 1.3, 1 specifications

Lochinvar 1 is a remarkable achievement in the realm of modern technology and engineering. As a powerful and efficient water heater, it has been designed to cater to a wide range of residential and commercial needs. One of the standout features of Lochinvar 1 is its advanced heating technology, which incorporates a high-efficiency condensing design. This technology allows the unit to achieve impressive energy savings by maximizing heat transfer while minimizing energy consumption.

The Lochinvar 1 utilizes a stainless steel heat exchanger that enhances durability and corrosion resistance. This not only extends the lifespan of the unit but also ensures consistent performance over time. Coupled with a user-friendly control system, users can easily adjust settings and monitor performance, enhancing overall convenience and usability.

Another key characteristic of the Lochinvar 1 is its compact design, making it suitable for a variety of installation environments. Whether in a residential basement or a commercial utility room, the unit’s space-saving configuration allows for efficient use of available area without compromising on capability.

Safety features are integral to the Lochinvar 1, providing peace of mind for users. The unit is equipped with advanced monitoring systems that can detect irregularities and automatically shut down the system if necessary. This not only protects the equipment but also enhances the safety of the environment in which it operates.

In terms of performance, Lochinvar 1 boasts a high recovery rate, ensuring hot water is available on demand. This is particularly beneficial for settings with high water usage, allowing simultaneous operations without lag.

Moreover, the unit supports various venting options, offering flexibility during installation. Whether using traditional vertical venting or innovations like direct venting, Lochinvar 1 accommodates different building designs and local codes, making it highly versatile.

In conclusion, Lochinvar 1 epitomizes the melding of efficiency, reliability, and user-friendly technology. With its high-performance features, robust safety systems, and adaptable installation options, it stands out as a forefront player in the water heating industry, meeting the diverse needs of today's consumers and businesses alike.
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