Macurco DVP-120 Specifications download pdf (Page 13)

Each zone can be conﬁgured to control one, two or all three of the relays and the external horn and strobe if desired. When more than one zone is controlling a relay it only takes one zone

to activate the relay, but all controlling zones must release the relay before it will turn off.

Each of the relays, horn and strobe have independent turn on delays (to ignore short duration, transient gas signals) and turn off delays (to ensure minimum run times for fans that must

run for internal cooling).

3.2.1 Zone Signal Display

When a zone is controlling the horn or strobe and they are activated, the panel will enter ZONE SIGNAL mode during which the horn and/or strobe will be turned on and the LCD will show

the zone that is signaling.

Figure 3-12 Zone Signal Display

The display will cycle through all zones that are controlling the horn or strobe and are signaling, at ﬁve seconds per display. Pressing any key (except HUSH) will advance the display to the

next zone that is signaling.

When the HUSH key is held for three (3) seconds, the horn and/or strobe will be silenced for ﬁfteen (15) minutes. When silenced, the display will show that zone signals have been silenced

for ﬁfteen minutes. After any key is pressed (or ﬁve seconds) the display will return to normal mode.

Figure 3-13 Zone Signal Silenced Message

3.3 Setting the System Conﬁguration

The conﬁguration menus can be entered from normal mode by pressing the MENU key. While in conﬁguration mode, the user can review all conﬁguration parameters to check the current

operating conditions. As an aid when conﬁguring the control panel, the ﬁrst entry in the top menu summarizes the number of sensors and relays that the panel is currently recognizing.

Figure 3-14 Hardware Summary

The MENU key is also used to return to a higher-level menu and ﬁnally exit the conﬁguration menus back to normal mode. When exiting from the menu system to normal mode, if any

conﬁguration changes have been made, the panel will ask whether changes are to be saved.

Figure 3-15 Save Conﬁguration? Prompt

Pressing the zero (0) key at this point will cancel all changes except time and day of week. Pressing the one (1) will save all changes to memory, and the changes will then become

effective in controlling the ventilation system.

While the DVP-120 is in the conﬁguration mode, alarm and ventilation control functions continue in the background with the previously set conﬁguration values. In particular, if an alarm

condition is detected, the alarm lamp, the buzzer, the horn and the strobe will operate as conﬁgured but the LCD will not display the detailed information. The HUSH key can be used to

silence any alarm, warning or trouble indicators without having to exit the conﬁguration mode. If the MENU key is used to exit the conﬁguration mode before using the HUSH key, the LCD

will display the cause of the audible indicator.

The numeric keys are used to change the particular parameter displayed. The underlined character, or space, on each display indicates what will be changed by the digit keys.

The left and right cursor keys will enter the particular submenu and scroll through the items of the same type where appropriate, e.g. enter the Conﬁgure Sensors submenu and scroll

through the parameter lists for the existing sensors.

The up cursor key scrolls through the menu entries in the order listed here, while the down cursor key scrolls in the reverse order.

Changingthecongurationparametersrequirestheentryofapasswordbeforechangescanbemade.Thedefaultpasswordis1234.SeeFigure3-21foranexampleofthepassword

prompt.

In many cases the parameter is entered as a string of digits, but some parameters are selected by pressing a single key, e.g. pressing 1 selects Monday, 2 selects Tuesday, etc.

3.3.1 System Menu

The top menu level allows the user to select:

- Conﬁgure System

- Conﬁgure Sensors

- Conﬁgure Relays, Horn & Strobe

- Conﬁgure Zones

- Conﬁgure Signals

The up and down cursor keys can be used to scroll through the entries in the list, while the left or right key will enter the particular submenu.

The MENU key will return to normal mode. If any conﬁguration parameters have been changed, the panel will prompt to save the changes. If the changes are saved, this is the point at

which they become effective in controlling the ventilation system and for alarm level detection. Note that changes to the time and day of week are not considered conﬁguration items;

they are saved as soon as they are entered.

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Macurco DVP-120 Specifications Page 13

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