Lochinvar INS7162, MP2, INS7141 Section B Staging Operation, Resetting the Rotation Sequence, Mode

Resetting the Rotation Sequence

To reset the rotation sequence, set the Rotate / Off DIP switch to the Off setting for 5 seconds and then return the DIP switch to the Rotate setting.

RUNNING TIMES

The control displays the accumulated running time of each boiler in the VIEW menu. When using a multi-stage boiler, the running time that is displayed is the total number of run- ning hours of the Lo stage of the boiler.

Resetting the Running Times

To reset the running time for each boiler, select the appro- priate running time in the VIEW menu. Next, press the up and down arrow buttons simultaneously until CLR is dis- played.

EXERCISING

The control has a built-in exercising feature that is selected through the Exercise / Off DIP switch. To enable the exer- cising feature set the Exercise / Off DIP switch to Exercise. If exercising is enabled, the control ensures that each pump is operated at least once every 3 days. If a pump has not been operated at least once every 3 days, the control turns on the output for 10 seconds. This minimizes the possibility of the pump seizing during a long period of inactivity. While the control is exercising, the Test LED flashes quickly.

Note: The exercising function does not work if power to the control or pumps is disconnected.

RELOADING FACTORY DEFAULTS

To reload the factory defaults, power down the control for 10 seconds. Power up the control while simultaneously hold- ing the Menu and down arrow buttons. The control will now display the E01 error message. To clear this error message, follow the procedure in the Error Messages section of this manual.

BOILER MINIMUM

The boiler minimum is the lowest temperature that the con- trol is allowed to use as a boiler target temperature. During mild conditions, if the control calculates a boiler target tem- perature that is below the BOIL MIN setting, the boiler tar- get temperature is adjusted to at least the BOIL MIN setting. During this condition, if the boiler(s) is operating, the mini- mum segment is turned on in the display when viewing either the boiler supply temperature or the boiler target tem- perature. Set the BOIL MIN setting to the boiler manufac- turer's recommended temperature.

BOILER MAXIMUM

The boiler maximum is the highest temperature that the control is allowed to use as a boiler target temperature. If the control does target the BOIL MAX setting, and the boil- er temperature is near the boiler maximum temperature, the maximum segment will be displayed in the LCD while either the boiler target temperature or the boiler supply tempera- ture is being viewed. At no time does the control operate the boiler(s) above 248°F (120°C).

SECTION B: STAGING OPERATION

SECTION B1: STAGING

Mode

The control is capable of staging single stage, two stage, three stage or four stage on / off heat sources. In certain modes of operation the control is capable of controlling the individual boiler pumps. The control has 8 modes of opera- tion based on the type of staging and pump operation that is desired. The following describes the modes of operation:

Mode 1: 9 Single Stage Boilers and a primary pump.

Mode 2: 4 Single Stage Boilers with individual boiler pumps and a primary pump.

Mode 3: 4 Lo/Hi boilers and a primary pump.

Mode 4: 3 Lo/Hi boilers with individual boiler pumps and a primary pump.

Mode 5: 3 Three Stage Boilers and a primary pump.

Mode 6: 2 Three Stage Boilers with individual boiler pumps and a primary pump.

Mode 7: 2 Four Stage Boilers and a primary pump.

Mode 8: 1 Four Stage Boiler with a boiler pump and a pri- mary pump.

FIG. 8

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