Lochinvar 1 service manual Set Point Parameters Screen

Page 21

1 Service (continued)

Set Point Parameters Screen:

The Set Point Screen allows access to 12 parameters. Those parameters are as follows:

•User Set Point - Sets the water temperature set point for fixed temperature operation or the maximum temperature set point when the outdoor air sensor is used. This parameter can be changed by the user or the installer. The temperature range of this parameter is 50° to 190°F. The default value is 125°F.

•Hot Water Tank Set Point - When a tank sensor is installed in a hot water storage tank, the hot water tank set point sets the target temperature of the water in the tank. This parameter can be changed by the user or the installer. The temperature range of this parameter is 60° to 185°F. The default value is 125°F.

•Hot Water Tank Differential - Sets how many degrees below the Hot Water Tank Set Point the hot water tank temperature must drop before the boiler will turn on. This parameter can only be changed by the installer. The temperature range for this parameter is 0° to 100°F. The default value is 5°F.

•Indirect HW Set Point - When a Hot Water Generation call for heat becomes active, the control will use the Indirect HW set point to determine the firing rate of the boiler based on the actual boiler outlet water temperature. This parameter can be changed by the user or the installer. The temperature range of this parameter is 50° to 190°F. The default value is 180°F.

•Night Setback Set Point - Once the internal clock has been set correctly, the night setback feature can be used to program a lower water temperature set point for space heating. This parameter can be changed by the user or the installer. The temperature range for this parameter is 32° to 140°F. This feature is turned off with a setting of 32°F. The default value is 32°F.

•Minimum User Set Point - Sets the minimum water temperature set point that can be used for space heating operation.

Service Manual

The

user

or installer may not go below

this

value

when

programming the “User Set Point”.

The

temperature range of this parameter is 0° to 190°F. The default value is 60°F.

•Maximum User Set Point - Sets the maximum water temperature set point that can be used for space heating. The user or installer may not go above this value when programming the “User Set Point”. The temperature range of this parameter is 0° to 190°F. The default value is 190°F.

•Drop in Inlet Temperature for Ending Anti-cycling - The control will bypass the anti-cycling time if the inlet water temperature drops too quickly. The control will use the inlet water temperature at Heat Exchanger 1 when it shuts off as the starting point. If the temperature drops below the temperature parameter the control will abort anti-cycling and allow the boiler to fire. This parameter can only be changed by the installer. The temperature range of this parameter is 0° to 86°F. The default value is 10°F.

•Anti-cycling Time - Once a system heat call has been satisfied, a set amount of time must elapse before the control will respond to a new system heat call. The control will block the new system heat call and Anti- cycling will be shown in the boiler status display until the time has elapsed or the inlet water temperature drops below the parameter drop in inlet temperature for ending anti-cycling. This parameter can only be changed by the installer. The time range for this parameter is 0 minutes to 40 minutes. The default value is 1 minute.

Reference page 18 for information regarding changing parameters.

Time - The time is displayed in the upper right-hand corner of the display. It is displayed in 24 hour format. Reference the night setback parameters on page 24 for information regarding adjusting the date and time.

Back button - Pressing this button will back the screen up to the

previous screen.

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Contents
Models 1.0, 1.3, Contents Niosh stated First Aid Handling ceramic fiber materialsService MaintenanceTroubleshooting Near boiler piping ServiceSync display Board Control inputsControl outputs Secondary Smart Touch Control Module PrimaryHow the boiler operates General OperationHow the control module operates Sequence of operationSequence of operation space heating and HW Sequence of operationParameter table This table lists the parameters and where to access themOutdoor Reset Status Screen Viewable and changeable control parametersService Details Screen Service Main Screen Setup Screen Service/Setup Parameters Screen Service Set Point Parameters Screen Outdoor Reset Parameters Screen Service Night Setback Parameters Screen Cascade Operation Cascade Parameters ScreenPumps Parameters Screen 10Vdc Operation 10Vdc BMS Parameters ScreenService Cascade Screen Service Temps Screen Burners Screen Graph Select Screen History Screen Service Mode Screen Maintenance Maintenance and annual startup Clean condensate trap Address reported problemsInspect boiler area Inspect boiler interiorFlue vent system and air piping Check water systemCheck expansion tank Check boiler relief valve Check all boiler wiring Check ignition ground wiringCheck control settings Inspect ignition and flame sense electrodesCheck flame signal Cleaning boiler heat exchangerReview with owner Test low water flow conditions Test procedureAlarm Screen TroubleshootingBefore troubleshooting Check the followingCheck control module fuses No Burner No DisplayOperation Unit DoesTemperature Resistance Checking temperature sensorsNo Pump NoisyOperation Boiler Pump System PumpCondensate Flow SwitchDrain Blocked Flame outLight cont’d Flame LostWhile Running Troubleshooting High Limit / HEX Automatic ResetTemp SW Blower RPM’sToo High Louver Proving SwitchSensor Open Sensor ShortedAir Flow Too Resets Try LaterLow Flap ValveNo Error Stored Internal FaultWriting to MemosGas Valve Adjustment Combustion Analysis ProcedureOr Obstruction Gas Supply PressureGas valve adjustment procedure ModelModels 1.3
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