TCY-T0121 Intelligent Compact Controller
Version: 2004-07
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Operation of the Terminal Unit
Switching ON
The unit is switched on by pressing the POWER button. It will start up in comfort mode.
Changing between COMFORT and STANDBY
Pressing the POWER button for less than 2 seconds toggles between STANDBY and COMFORT modes. Standby mode
may be disabled with UP07.
Switching OFF
Pressing the POWER button for more than 2 seconds, will switch the unit off. OFF and current time will be displayed
in the LCD for the deluxe unit. Current temperature and OFF is displayed for the basic unit.
Standard display
Standard display is enabled with parameter UP-17. This display mode is active if no UP/DOWN or OPTION key has
been pressed during the previous 30 seconds. The contents of the large and small digits may be chosen with
parameters UP-18 to UP-20.
Should Standard display be disabled, the selected loop setpoint will be displayed in the small digits, the associated
input in the large digits and the output in the right hand scale.
Changing of setpoints
Step through the enabled control loops by repeatedly pressing the OPTION button. The large digits indicate the loop
action (reverse/direct) for 2 seconds and afterwards the input value of the activated control loop. The output value is
indicated in the scale. The small digits show the setpoint of this loop. Pressing directly UP/DOWN will select the first
control loop enabled in this order: Temperature PI, Universal reverse acting, and universal direct acting.
Select the desired control loop with the OPTION button and change the setpoint with the UP/DOWN buttons.
Changing of setpoints may be disabled with UP-01.
Override of secondary setpoint in cascade control
In case cascade control is active (for example VAV control), it is possible to override the primary loop and manually
set the setpoint of the secondary loop. While the secondary loop is displayed change the setpoint with UP/DOWN
keys. The manual indication will show on the display. (For VAV this would mean the loop is now changed to CAV.
This would be especially useful while tuning the VAV system) Pressing the OPTION key to move back to the
temperature loop will cancel manual override.
Manual override may be disabled with UP-02.
Schedule control of digital outputs
This feature is available if schedule control for a digital output is enabled (OP7/8). Select the digital output by
repeatedly pressing the OPTION button until DO1 or DO2 is displayed in the large LCD digits. Pressing UP/DOWN
steps through following modes ON, OFF, PROG, selecting ON or OFF sets the output in manual mode, the manual
symbol is displayed. Pressing the OPTION button for more than 3 seconds starts the schedule mode. The schedule
operation for the DO is similar to general time scheduling (see below). A total of 2 programs with each 4 switc hing
times for each DO are available. The DO will be switched off, if the operation mode is OFF.
Accessing advanced settings
Pressing the option button for more than three seconds will start the advanced setup menu. The large LCD digits
display SEL. The advanced setup menu accesses these settings: Clock setup, Time schedules, Heat / Cool change for
2 pipe systems. The menu may be left by pressing the POWER key or by not pressing a key for more than 2 minutes.
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Deluxe only: Clock Setup. The current time is displayed in the small digits. Pressing the OPTION button will
enter the clock setup. The minutes are blinking and may be changed with the UP/DOWN keys. Pressing
OPTION saves the minutes and steps to the hours. The hours are blinking. Pressing the OPTION key again
will step to the weekday. DAY1-7 is displayed. Day 1 stands for the first working day (Monday) of a 5-day
working week. (See schedule). Select the day according to current weekday. Pressing Option again saves
the settings and moves back to the SELECT menu.
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Deluxe only: Time Schedules: press the option key while Pro is displayed in the small digits. Pro1 is now
shown in the large digits, while the number 1 is blinking. Select time program by using UP/DOWN keys.
There is a total of 4 time programs with each 4 switching times available. Enter the time program by
pressing the OPTION key.
1. Activate or deactivate the time program. Choose ON or OFF with the UP/DOWN keys
2. Select weekday(s) = d1-7, d1-5, d6-7, day1, day2, day3, day4, day5, day6, day7
3. The next steps define the switching mode and time. The bar indicator on the right side shows
programming progress. There are four switch times for each program.
o
Select desired operation mode. (no, ON, Eco, OFF), press OPTION to continue
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no = disables this time schedule
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On = sets operation mode to On and Comfort
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Eco = sets operation mode to On and Standby
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OFF = switches unit Off
o
Select switching time 00:00 to 23:45 in 15-minute steps, press OPTION to continue.
o
Repeat above two steps for each switching time.
Access to time schedules may be disabled with UP-04
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Heat / Cool change. Pressing UP or DOWN toggles Heating – Cooling mode. (For two pipe systems only)
Access to Heat/Cool change may be disabled with UP-03
