Honeywell ST772 Programmable Thermostat
INTRODUCTION
The slider should ałways be returned to the AUTO position after setting the programmer. The CHANGE button function as described under Using your Programmer is used to temporarily override the heating or hot water and to alter the time of day or the programme times when setting up the programmer The programmer is delivered with a factory installed program for Hot Water and Heating as detailed below. This can easily be modified as described later
Built in programme
lst OFF 2nd ON 2nd OFF 4.30pm Ist ON 6.30am 8.30am 10.30pm
Setting the Correct Time and Day
- Move the TIME SET slider to the DAY/CLOCK position. display will now be flashing to indicate it can be changed.
- Use the DAY button to change the day indicated to the current day. Each press of the DAY button will move the day marker on one day ata time.
- Use the + and buttons to set the current time of day, making sure that the AM/PM symbol is corect.
- Note: Pressing and releasing a + or- button changes the time in one minute steps. If the button is held down for a few seconds, the time changes more rapidly
- If the programme times are to be changed follow the instructions below. If not, return the slider to the AUTO position.
Setting the ON and OFF programme times
- Move the TIME SET slider to the 1st ON time. The display will now change to show the 1st ON time. The ON time will flash to indicate it can be changed. The day marker will appear below MON indicating that you are changing the programme times for Monday.
- Use the + and- buttons to set the required 1st ON time
- Move the TIME SET slider to the Ist OFF time. The OFF time will flash to indicate it can be changed.
- Use the + and buttons to set the required 1st OFF time
- Repeat steps 1 to 4 to set the 2nd ON and OFF times
Choice 1
STEP DAY. Press the DAY button to move the day marker to the next day. The ON OFF times can now be set by following steps 1-5 above. Repeat this process until every day of the week has been set.
Choice 2
STEP DAY AND COPY. Press and hold down the DAY button for at least three seconds. The day marker for the next day will appear and, at the same tume, the current day marker wll start to flash to indicate a copy function is in progress. Repeat this process to copy the current day’s programme into several days of the week required.
Note: If the ST772 has been installed as a Weckday-Weekend programmer, the day marker will be displayed as a block of days (Mon…Fri or Sat…Sun) when setting the programme times.
- The DAY button will switch between the Weekday and Weekend programmes when pressed.
- Each programme time can be set between 3.00am and 2.50am (on the next day) to allow you to programme past midnight if required.
- Programme times cannot be set out of sequence. If the – button is being pressed, the time will stop changing when it equals a previous programme time.
- If the + button is being pressed, subsequent programme times will be pushed forward along with the one being set.
- If the TIME SET slider is accidentally left in an ON, OFF or DAYCLOCK position for a period of 10 minutes, the unit will start to operate as if it had been left in AUTO.
- The display wil flash when this occurs to remind you to move the slider to the correct position.
Reviewing and Changing Programme Times
- To review the ON OPF programme times and change them if required move the TIME SET slider to each of the ON OFFF positions in turn.
- Press the DAY button to select different days as required. Any time can be adjusted by using the + or – buttons.
- Move the TIME SET slider to the AUTO position to complete reviewing/ehanging the programme times.
Using your Programmer
Normal Operation
- Ensure that the TIME SET slider is in the AUTO position
- Red indicator lamps to the left of the CHANGE buttons show when the heating or hot water is switched ON.
- Choose the operation for heating and hot water from the following options on the programmer, using the two sliders on the right hand side of the programmer.
- CONT The heating or hot water remain ON continuously
- TWICE The heating and hot water will turn ON and OFF at each of the ON and OFF times set.
- ONCE The heating or hot water will turn ON at the first ON time set and stay on until the last OFF time set each day.
Change
To temporarily override the heating or hot water settings press the CHANGE button. If the heating or hot water system is ON it will turn OFF until the next programmed ON time. If OFF it will turn ON until the next programmed OFF time. To cancel press the button again. Change operates only in the TWICE and ONCE modes.
Notes
Pressing the RESET button will completely reset the program settings to the factory pre-set times. Your programmer is fitted with a battery reserve which will sustain the operation of the programmer for a maximum of 12 hours of mains electricity disconnection. Your programmer is not user serviceable. Do no1 attempt to dismantle the unit. In the unlikely event of a fault developing in the wTnit or with any other part of your heating system contact a qualified heating installer. However, first, try esetting the programmer as described above.
Reference
Download Manual:
Honeywell ST772 Programmable Thermostat User Instructions