Lochinvar 1 service manual Details Screen

1 Service (continued)

Details Screen:

The Details Screen is accessed by pressing the DETAIL button on the Status Screen. This screen shows the status of the various safeties, inputs and outputs to each control module. Selection of the control module to be viewed is accomplished by pressing the SELECT button. The control module being displayed is shown in the module box.

Displayed items are as follows:

•SH Enable - Is ON when a system heat call has been received from a remote end switch or enabling device. Is OFF when a system heat call is not present.

•Manual Reset High Limit - Is ON when the manual reset high limit is closed. Is OFF when the manual reset high limit is open.

•SH Pump - Is ON when a system heat call has been received and the boiler pump is energized. Is OFF when the boiler pump is de-energized.

•HW Thermostat - Is ON when a Hot Water Generation call has been received from a tank thermostat. Is OFF when a Hot Water Generation call has not been received from a tank thermostat.

•Air Pressure Switch - Is ON when the combustion air blower is energized and the flap valve switch is closed. Is OFF when the flap valve switch is open.

•Gas Valve - Is ON when the gas valve is energized. Is OFF when the gas valve is de-energized.

•Gas Pressure Switches - Is ON when the high and low gas pressure switches are closed. If OFF when either the high or low gas pressure switches are open.

•Flow Switch / Low Water Cutoff - Is ON when the low water cutoff contacts are closed or if an optional flow switch is used and it is closed as well. Is OFF when the low water cutoff contacts are open or if an optional flow switch is open.

Service Manual

•Alarm - Is ON when a fault has been detected and the alarm contacts are closed. Is OFF when the alarm contacts are open.

•Louver Proving Switch - Is ON when a remote proving safety switch is closed. Is OFF when a remote proving safety switch is open.

•Blocked Drain Switch - Is ON when the blocked drain switch on the condensate trap is closed. Is OFF when the blocked drain switch on the condensate trap is open.

•Blower Power - Is ON when the combustion air blower is energized. Is OFF when the combustion air blower is de- energized.

•System Pump - Is ON when a system heat call has been received and the system pump has been energized. Is OFF when the system pump is de-energized.

•Auto Reset High Limit - An auto reset high limit is not used in the standard configuration of the SYNC boiler. If OFF is shown then a wiring problem exists.

•Run Time Contacts - Is ON when the burner is energized. Is OFF when the burner is de-energized.

•HW Pump - Is ON when a Hot Water Generation call has been received from a tank thermostat or a tank sensor and the hot water generation pump is energized. Is OFF when the hot water generation pump is de-energized.

•0-10Vdc - Shows the voltage signal being delivered from a remote Building Management System (BMS).

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