Emerson DH Manuel D’Utilisation

Selecting SETUP CUSTOM ALARMS will step to the following menu:

• SETUP CUSTOM ALARM TEXT
• CHANGE CUSTOM TEXT 1
• CHANGE CUSTOM TEXT 2
• CHANGE CUSTOM TEXT 3
• CHANGE CUSTOM TEXT 4

The custom alarm messages can be selected from a list of standard messages or you can write your 

own messages. The message selected for any custom alarm can be changed at any time by selecting 

SETUP CUSTOM ALARM TEXT. Five standard messages (see Standard Custom Alarm Mes-

sages below) and four custom messages are available to choose from. To modify the custom messages 

press CHANGE CUSTOM TEXT 1 (2, 3 or 4). Each message can be up to 20 characters in length and 

can be any of the following characters (or a blank space): ABCDEFGHIJKLMNOPQRSTU-

VWXYZ#%*-0123456789.

• WATER UNDER FLOOR
• SMOKE DETECTED
• STANDBY GC PUMP ON
• LOSS OF WATER FLOW
• STANDBY UNIT ON

For more information concerning alarms, see 6.0 - Alarm Descriptions and Solutions.

When water is detected the alarm will sound and the WATER UNDER FLOOR alarm message will be 

displayed. To see where the water is in the room, select VIEW/SET ALARMS from the Main Menu, 

then VIEW WATER DETECT FLOOR PLAN. A tile will be highlighted and blinking to indicate the 

position of the detected water.

The water detection display is designed to graphically display the location of water under a raised 

floor when connected to an LT750 water detection system. The selected (i.e., cursor) floor tile will be 

highlighted and blinking. The UP and DOWN arrow keys are used to position the cursor tile. The UP 

key will move the cursor tile up and then it wraps around to the bottom of the next column to the 

right. The DOWN arrow key moves the cursor down, then to the top of the next column to the left. The 

cursor will also wrap around from the right top tile to the left bottom tile and back.
There are three different types of tiles to be defined: the environmental unit, the LT750 and sensor 

cable tiles. To set up the cable layout, first move the cursor to the location of the environmental unit 

and press the ENTER key. A rectangular box will be drawn at that location. Then move the cursor to 

the location of the LT750 and press the ENTER key. A solid circle will be drawn on the display. No 

tile can have two definitions, so if the LT750 is physically directly under the unit, it has to be defined 

at least one tile away. 
The sensor cable should not be defined one tile at a time. The only sensor cable tiles that need to be 

defined are the tiles where the cable is going to change direction, and the last tile. The display will 

automatically define any tiles between two consecutively defined sensor tiles to be sensor tiles.
The ENTER key is also used to undo tile definitions. If a tile is defined in the wrong place, position 

the cursor on that tile and press the ENTER key. It will undefine the tile under the cursor and move 

the cursor back to the last defined tile. The entire layout can be erased by successively pressing the 

ENTER key. When the last tile is defined, press the ESCape key to leave the setup screen.

Install the LT750 following the instructions in the LT750 Users Manual. The following additional 

switch selections should be made when connecting to an Advanced Microprocessor control:

DIP SW3-4 Off-(water alarm relay energizes for alarm)
DIP SW3-5 Off-(cable fault relay energizes for alarm)
Switch 1 - Off-(LT750 sources power for 4-20 mA loop)