Lochinvar 402 - 2072 operation manual Set DHW operation, Set clock, Configuration of the cascade

Installation & Operation Manual

6 Start-up

Set DHW operation

Verify DHW circulator mode (boiler only)

The DHW Mode is programmed to heat an indirect domestic hot water tank. When the tank thermostat or tank sensor calls for heat, the SMART SYSTEM control will turn on the DHW pump and turn off the boiler pump (if running). If the system pump is running, it will remain on. When the DHW call for heat ends, and there is no space heating call for heat, the DHW pump will continue to run for a period of time. This pump delay is set at the factory to 30 seconds. If a shorter or longer delay is desired, the appropriate parameter in the control must be changed. See the Copper-fin II Service Manual for a detailed explanation of this procedure. If there is an active space heating call for heat, then the boiler pump will be turned on and the DHW pump will be turned off.

Set outlet target temperature (boiler only)

When in the DHW Mode, the control will modulate to maintain the outlet temperature to a set point. This set point is set at the factory to 180°F (82.2°C). If a different set point is desired, the appropriate parameter in the control must be changed. See the Copper-fin II Service Manual for a detailed explanation of this procedure.

Set tank target temperature

If a tank sensor is used, the tank set point can be adjusted by pressing either the UP or DOWN key. A menu will appear on the LCD display. Press the DOWN key to select the tank set point, and press ENTER. Use the UP and DOWN keys to adjust the set point. Press the ENTER key again to save the new set point and return to the normal display.

Set clock

The SMART SYSTEM control has a built-in clock that it uses for its night setback feature and for logging events. This clock must be set when the appliance is installed, and anytime the appliance has been powered off for more than one month. Use the following procedure to set the clock:

1.Press and hold the MENU key (FIG. 7-1) for at least 5 seconds.

2.The display changes to ready “ENTER MENU CODE”, with four (4) zeros below it.

3.Change the zeros to match the user code (factory set at “0704”). Use the UP and DOWN keys to increment or decrement the flashing digit, and the NEXT and PREVIOUS keys to select which digit flashes.

4.Press the ENTER key.

5.The display changes to read USER CODE for a few seconds, then displays a menu.

6.Press the ENTER key.

7.Press the UP key twice to display “A3 DATE AND TIME”.

8.Press the ENTER key once.

9.The date and time are displayed as “YY:MM:DD W hh:mm”, where:

mm:minutes

hh:hour (24 hour time; e.g., 2:00 PM = 14:00)

W:day of the week (1 = Sunday, 2 = Monday, 3 = Tuesday, etc.,)

YY:	year
MM:	month
DD:	date

NOTICE	The internal clock does not adjust for
	Daylight Savings Time and therefore, will
	require a manual adjustment.

Use the UP and DOWN keys to increment or decrement the flashing number, and the NEXT and PREVIOUS keys to select which number flashes.

10.Press the ENTER key to save the setting.

11.Press the MENU key twice to exit the Programming Mode.

Configuration of the cascade

When installed in a Cascade system, the individual controls must be programmed for cascade operation. This is accomplished by accessing the control parameters.

Input the Installer code as described in the Copper-fin II Service Manual. Once the control parameters have been accessed, use the DOWN arrow key to select the H Control Mode parameters. Press the ENTER key to access these parameters. Use the UP arrow key to access parameter H4 Cascade. Press the ENTER key to access this parameter. Use the DOWN arrow key to select Enable. Press the ENTER key to program this into the control. Press the EXIT key, then press the DOWN key until I Cascade is selected.

Press the ENTER key to select the parameter I1 BLR Address. Press the ENTER key to access this parameter. Each unit in the Cascade system must be programmed with its own address. The unit designated as the Leader will have an address of 0. The remaining units in the Cascade will be Members and have addresses from 1 - 7. Use the UP and DOWN arrow keys to select the appropriate address. Press the ENTER key to program this into the control.

Press the MENU key twice to exit the control parameters. Repeat this procedure for all appliances in the Cascade, designating the Leader control and the Member controls.

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