Lochinvar 402, 2072 service manual Viewable and changeable control parameters, Temperature settings

Page 17

Copper-fin II/IIE Boiler and Water Heater Service Manual

1 Service (continued)

Viewable and changeable control parameters

CAUTION Before changing parameters, note the settings so that the unit can be returned to

its original operating parameters.

General

User code

The User Code allows the user to access and change a limited number of control parameters. The access code can be changed by the user or the installer to a code of their choosing. The default code is 0704. The code can be changed one digit at a time by using the arrow keys on the display.

Date and time

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 unit is first installed or any time the unit has been powered off for more than 30 days. The date and time are displayed as “YY:MM:DD W hh:mm”. YY = year, MM = month, DD = date, W = day (1 = Monday, 2 = Tuesday, etc.), hh = hour (24 hour time; 2:00 PM = 14:00), mm = minutes.

NOTICE

The internal clock does not adjust for

Daylight Savings Time and therefore, will

 

require a manual adjustment.

Software version

 

The software version allows the user to view the software version in use by the control. This software controls the operation of the unit. When a new software version becomes available, the existing control can be replaced with a new control to update the software.

Temperature units

The control can be configured to display temperature in either °C or °F. The default is °F.

SH Night setback offset (boiler only)

Once the internal clock has been set correctly, the SH night setback feature can be used to program a lower setpoint. The value of this parameter will be subtracted from the normal setpoint to determine the setpoint used during night setback. The temperature range for this parameter is 0°F to 90°F (50°C). The feature is turned off with a setting of 0°F. The default value is 0°F.

SH Night setback times (boiler only)

If the SH Night Setback parameter is set to anything other than 0°F, the night setback feature becomes active. This will require start and stop times to be programmed for the days that reduced temperatures are required. Each day of the week (Monday through Sunday) will have an on and off time.

Example: Monday ON: 22:30, Tuesday OFF: 6:45. If you wish to skip a day and have no night setback, set the on and off times to the same time, and prior to 12:00 p.m. To keep night setback active through the entire day, set the on and off time to the same time, and after 12:00 p.m. The default times for each day will be 08:00 (OFF) and 18:00 (ON).

DHW Night setback offset

Once the internal clock has been set correctly, the DHW night setback feature can be used to program a lower SH setpoint during various times of the week. The value of this parameter will be subtracted from the normal setpoint to determine the setpoint used during night setback. The temperature range for this parameter is 0°F to 90°F (50°C). The default value is 0°F.

DHW Night setback times

If the DHW Night Setback parameter is set to anything other than 0°F, the DHW night setback feature becomes active. This will require start and stop times to be programmed for the days that reduced temperatures are required. Each day of the week (Monday through Sunday) will have an on and off time. If you wish to skip a day, set the on and off times to the same time, and prior to 12:00 p.m. To keep night setback active through the entire day, set the on and off times to the same time and after 12:00 p.m.

Temperature settings

SH Setpoint (boiler only)

The SH setpoint user sets the water temperature setpoint for fixed operation, or the maximum temperature setpoint when the outdoor air sensor is used. The temperature range of this parameter is 60°F (15°C) to 230°F (110°C). The default value is 80°F (27°C).

SH Minimum setpoint (boiler only)

The SH minimum setpoint sets the minimum water temperature setpoint that can be used for space heating operation. The user or installer will not be able to program the control with a lower SH setpoint. The temperature range of this parameter is 32°F (0°C) to 230°F (110°C). The default value is 70°F (21°C).

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Contents Copper-fin II/IIE Boiler and Water Heater Models 402 Contents Niosh stated First Aid Please read before proceedingHandling ceramic fiber materials Service What is in this manual?Maintenance TroubleshootingCopper-fin display ServiceControl inputs Control outputs How the appliance operates General OperationHow the control module operates Sequence of operationOUT 123.8F129 Sequence of operationHTR Postpurge Display panel menu access Display panel parameter access Only Parameter table a Boiler OperationAnti-cycle Time Anti Cycl Tm Parameter table B Water Heater Operation BMS Service Notification Pumps Viewable and changeable control parameters Temperature settingsFunctions Data loggingDHW settings Outdoor air reset boiler only Anti-cycling Control modes Cascade Building Management System BMSCirculation pumps Service NotificationService technician Maintenance Maintenance and annual startupOwner maintenance See the User’s Information Manual for instructionsMaintenance Inspect/replace hot surface igniter Check relief valveInspect/replace hot surface igniters Check control settings Check all wiringInspect and clean burner Perform start-up and checks2Adjusting air shutter 399,999 750,000 Btu/ hr Models Checking manifold gas pressure Adjusting combustion air pressurePressure Regulator Chamber Adjustment Manifold Oiled bearing circulators Inspect and clean the heat exchangerReview with owner Before troubleshooting TroubleshootingCheck control module fuses Check the followingNo Burner No DisplayOperation Unit DoesTemperature Resistance Checking temperature sensorsResistance Temperature No Pump NoisyOperation Boiler Pump System Pump DHW PumpAnti-cycling Flow SwitchFlame Sequence No Flame Ign ErrorHSI Current Low Flame CKTNo Flame Auto ResetRunning High LimitInlet Low Manual ResetSensor Open Sensor ShortedTank Open Louver ProvingAPS Open APS ClosedParameters Progr Temp O/ShootRem Ctrl Flt Watch Dog Error Service BlkNo Error Stored Low Voltage
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402, 2072 specifications

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