Lochinvar 3.5, 2.5 Verify HWG circulator mode Set HWG target temperature, Set clock

9 Start-up(continued)

Set Hot Water Generator (HWG) operation

Verify HWG circulator mode

The HWG Mode is programmed to heat an indirect hot water tank. When a tank thermostat or a tank sensor initiates a call for heat, the SMART TOUCH control will turn on the HW pump and turn off the boiler pump (if running). If the system pump is running, it will remain on. When the HW call for heat ends, and there is no space heating call for heat, the HW pump will continue to run for a period of time. This pump delay is set at the factory to 60 seconds. If a shorter or longer delay is desired, the appropriate parameter in the control must be changed. See the Crest 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 HW pump will be turned off.

Set HWG target temperature

When in the HWG 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. If a different set point is desired, the appropriate parameter in the control must be changed. See the Crest Service manual for a detailed explanation of this procedure.

If a tank sensor is installed, the HWG heat demand will start when the tank temperature drops 6°F below the tank set point, and stop when the tank temperature reaches the tank set point. The tank set point is set at the factory to 120°F (49°C).

Set clock

Press the following buttons to program the clock:

>>>>

After pressing SETUP, the Password Screen will appear. Entering the correct password will allow access to all Installer Level adjustable parameters. Press ENTER without a password to access the User Level parameters.

The SMART TOUCH 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 boiler is installed, and anytime the boiler has been powered off for more than one day. Use the following procedure to set the clock:

1.To set the clock, highlight Clock using the arrows and press the SELECT button. Use the left and right arrows to select hours, minutes, AM/PM and the up and down arrows to set.

2.To set the date, highlight Date using the arrows and press the SELECT button. Use the left and right arrows to select the day of the week and the up and down arrows to set.

Installation & Operation Manual

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

When installed in a Cascade system, the individual controls must be programmed for cascade operation. To program the cascade parameters, access the Cascade Menu found in the Setup Menu by pressing the following buttons:

>> >> >>

After pressing SETUP, the correct installer password MUST BE entered.

1.Once in the Cascade Setup Menu select the appropriate parameter using the arrows and press the SELECT button.

2.The description of the selected parameter and its current setting will appear at the bottom of the screen.

3.To adjust the parameter, press the + or - buttons to change the value being displayed.

4.Make the correct adjustments and then press the SAVE button.

5.Once all the parameters have been adjusted press the BACK button. This will return you to the Cascade Screen.

Note: The SAVE button must be pressed to ensure proper programming of the controls. Failure to press the SAVE button will require all changes to be reprogrammed.

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