Set domestic hot water DHW operation | Lochinvar 51-211 specification

10 Start-up

Set domestic hot water (DHW) operation

Verify DHW mode

There are two (2) modes of operation for DHW. In Normal Mode, when a DHW demand begins, the control will start the DHW pump, turn off the boiler pump (if running), and modulate to bring the outlet temperature to the DHW boiler set point. The maximum firing rate may be limited in this mode if desired.

In Zone Mode it is assumed that the indirect DHW tank is piped as a zone on the primary loop. When a DHW demand begins, the control will turn on the DHW pump output, and raise the system temperature set point to the DHW boiler set point (if higher). The boiler pump will be turned on. The system pump may be forced on, forced off, or not changed, depending on the System Pump Mode selected (reference the Knight Wall Mount Service Manual for details). In this mode, any low temperature zones (such as radiant heating) may need additional controls to limit the water temperature sent to those zones.

Set DHW boiler target temperature

When in the DHW Mode, the control will modulate to maintain the boiler outlet temperature or system supply 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 Knight Wall Mount Service Manual for a detailed explanation of this procedure.

Set maximum DHW fan speed

If the rated input of the indirect tank is less than the maximum output of the boiler, change the maximum DHW fan speed setting to limit the boiler output accordingly, see the Knight Wall Mount Service Manual for a detailed explanation of this procedure.

Set clock
	Please note that the brackets ([]) denote
NOTICE	Please note that the brackets ([]) denote
	screen status.
	screen status.

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 boiler is installed, and anytime the boiler has been powered off for more than 4 hours. Use the following procedure to set the clock:

1.Press and hold the LEFT SELECT [MENU] key for at least 5 seconds.

2.The display changes to read [PASSWORD], with four (4) zeros below it.

3.Press the RIGHT SELECT [SAVE] key.

4.The display will then show a menu with the time and date and temperature unit.

5.Press the NAVIGATION dial twice.

6.Turn the NAVIGATION dial to adjust the hours. Press the NAVIGATION dial.

Installation & Operation Manual

7.Turn the NAVIGATION dial to adjust the minutes. Press the NAVIGATION dial.

8.Turn the NAVIGATION dial to adjust the month. Press the NAVIGATION dial.

9.Turn the NAVIGATION dial to adjust the date. Press the NAVIGATION dial.

10.Turn the NAVIGATION dial to adjust the year. Press the RIGHT SELECT [SAVE] key.

11.Press the RIGHT SELECT [HOME] key.

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

The clock is automatically updated whenever a PC is connected and the Win_Pro-Installer program is started.

Configuration of the cascade

NOTICE	Please note that the brackets ([]) denote
	screen status.

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

Press the [MENU] key for at least five (5) seconds. Input the Installer code as described in the Knight Wall Mount Service Manual. Once the control parameters have been accessed, use the NAVIGATION dial to select the Control Mode parameters. Press the NAVIGATION dial to access these parameters.

Rotate the NAVIGATION dial to select the parameter Cascade Address. Press the NAVIGATION dial to access this parameter. Each appliance in the Cascade system must be programmed with its own address. The boiler designated as the Leader will have an address of 0. The remaining boilers in the Cascade will be Members and have addresses from 1 - 7. Rotate the NAVIGATION dial to select the appropriate address. Press the RIGHT SELECT [SAVE] key. If installing the boilers in an existing system, the new boilers should be programmed as the Leader and/or the higher number addresses.

Press the RIGHT SELECT [HOME] key to upload the address into the control. Repeat this procedure for all boilers in the Cascade, designating the Leader control and the Member controls.