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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
13 62-0255—09
Program, Schedule, and Summary
Menus
To access these menus from the home screen, press the
MENU button. See Fig. 23.
Fig. 23. Menus.
Depending on whether scheduling is enabled or not, the
LCD displays one of two menus as shown in Fig. 23.
Scheduling is enabled from the Setup menu’s Output
settings (see “1.3.3.1. USE SCHED” on page 22).
Setup Menu
To access the Setup menu, press and hold the MENU
button for five seconds. See Fig. 24.
Fig. 24. Setup Menu.
Using the Menus
When you are working with the menus, use the:
• Left arrow button (t) to scroll backward through the
menus
• Right arrow button (u) to select the highlighted menu
item and display its content
• Up and Down arrow buttons (p and q) to scroll up and
down through a list of items or to increase or decrease
the value of a displayed parameter
NOTES:
1. If you press the HOME button or there is no
keypad activity for four minutes, you exit
Program mode and return to the home
screen.
2. If you press the MENU button, you exit and
return to the menu.
PROGRAMMING OVERVIEW
The controller must be programmed before being placed
into service.
IMPORTANT
During programming, the controller is live at all
times. For example, the contacts may open and
close when adjusting the setpoint.
The Programming process uses a hierarchical menu
structure that is easy to use. You press the t and u arrow
buttons to move forward and backward through the
menus.
NOTES:
1. The T775U controller interface is intuitive. You
may find that you do not need the following
procedure instructions to program the control-
ler. You may want to use this procedure sim-
ply as a reference to locate the particular
option or parameter of interest.
2. The menus can display only those relays that
are defined in Setup (see “1.3.2. NBR OF
RELAYS” on page 22). For example, if you
configure only one relay, then only one relay
displays on the appropriate menus.
3. If you press the HOME button or there is no
keypad activity for four minutes, you exit Pro-
gram mode and return to the home screen.
4. If you press the MENU button, you exit
Program mode and return to the menu.
Setpoint and Differential
The following describes the relationship between setpoint
and differential for heating and cooling. These settings are
programmed for each output relay.
In heating mode, reverse acting mode, and humidify
mode, the differential falls below the setpoint. The relay
de-energizes when the temperature rises to the setpoint.
As the temperature drops to the setpoint minus the
differential, the relay energizes.
In cooling mode, direct acting mode, and dehumidify
mode, the differential falls above the setpoint. The relay
de-energizes when the temperature falls to the setpoint.
As the temperature rises to the setpoint plus the
differential, the relay energizes.
Setpoint High Limit
You can set an irreversible setpoint high limit maximum
value for any single displayed setpoint value.
Adjust the setpoint (at any output) to the desired
maximum setpoint. Then, simultaneously press the
HOME, t, and u buttons and continue to press all three
buttons for five seconds to set the setpoint high limit
maximum to this value.
NOTE: You must press all three buttons at exactly
the same time for this action to occur.
MENU
PROGRAM
EXIT
home
menu
OR
MENU DISPLAY WHEN
SCHEDULING IS NOT SET
MENU DISPLAY WHEN
SCHEDULING IS SET
MENU
MOD1 40%
MOD2 60%
DI ON
HOME
RELAYS 1 2
ON
F
o
F
o
SENSORS
SENSOR A
78
SENSOR B
84
PROGRAM
SCHEDULE
SUMMARY
EXIT
M24565
home
menu
SETUP
MOD1 40%
MOD2 60%
DI ON
HOME
RELAYS 1 2
ON
FIVE
SECONDS
F
o
F
o
SENSORS
SENSOR A
78
SENSOR B
84
SENSORS
OUTPUTS
EXIT
M24566