Display Menu Guide - NTI Vmax VM153 Installation And Operation Manual

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Display Menu Guide

17.0 DISPLAY MENU GUIDE
Initial Power-up
Immediately following power-up of the boiler, the display reads, "conn", indicating it is connecting to the
controller; this is followed by a momentary reading of the display software version, e.g. init d349. After which the
controller performs a de-air sequence that is designed to purge air from the boiler water. The de-air sequence
cycles the circulators off and on, for a period of 14 minutes, in an attempt to free air pockets that may exists in the
heat exchanger and boiler piping.
The de-air sequence is initiated following each power-up of the boiler; if air has already
been adequately purged from the system the de-air sequence can be stopped by holding
the OK button until "dAir" is no longer displayed on the screen, see Figure 17-1.
The de-air sequence is designed to remove air from the system; failure to adequately
remove air from the system can damage the heat exchanger and void the warranty, and
may lead to property damage and personal injury.
dAir – indicates the
boiler is performing
the de-Air sequence.
Ok button – press and
hold to skip the de-Air
sequence.
Main Screen
Following power-up of the boiler (after the de-air sequence), or after 60 seconds of inactivity (no buttons
pressed), the boiler defaults to the Main Screen, see Figure 17-2. Under normal operating conditions the Main
Screen displays the boiler outlet temperature and water pressure, as well as an indication of the current heat
demand (CH or DHW), burner status and outdoor reset function. See Figure 17-2 for more details.
User Menu access – from the Main Screen, access to the User Menu is accomplished simply by pressing the UP
or DOWN button on the console; see User Menu section below for more details.
Installer Menu access – from the Main Screen or User Menu, access to the Installer Menu is accomplished by
pressing and holding the MENU and OK buttons simultaneously; see Installer Menu section below for more
details.
Return to Main Screen – from the User Menu, return to the Main Screen by pressing the OK button. From the
Installer Menu, return to the Main Screen by pressing and holding the RESET button.
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Figure 17-1 de-Air Sequence
Vmax I&O Manual
Temperature unit
Boiler outlet
temperature