tekmar 521 Programmable Thermostat Installation - Manual (Page 24)

© 2014 521_D - 01/14
24 of 28 A Watts Water Technologies Company
The thermostat includes a time clock that is automatically visible in the Home
menu when a programmable schedule is used. If the schedule is not used, the
user has the option to select whether the time is shown in the Home menu.
During a loss of power, the thermostat continues to keep the correct time
and date for at least 4 hours. If the power is off for more than 4 hours, the user
will need to set the time.
Time Clock
Energy savings can be achieved by lowering the heating temperature and increasing
the cooling temperature when the building is unoccupied or during the night.
When operating on a programmable schedule, a or a symbol is shown in the
home menu. The or indicates the current operating temperature.
All schedules are stored in permanent memory and are not affected by a loss
of power.
Display Action
Day temperature
Night temperature
This thermostat can operate on a programmable schedule in order to automatically
lower the room temperature setting. The schedule can be off or on.
The thermostat can support schedules that have either:
2 events per day
4 events per day
Schedules with four events per day are common for residential use while two events
per day are common for commercial installations.
The schedules can be repeated every:
24 hours
7 days (week)
A 7 day schedule allows a unique time to be set to change the temperature for each
day of the week.
The schedule also includes a “SKIP” option that allows the programmable schedule to
skip a temperature change and remain at the previous temperature setting. The “SKIP”
setting can be found between 11:50 PM (23:50 hours) and 12:00 AM (0:00 hours).
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Programmable Schedule
Fan Operation
A fan is available when the thermostat operates a forced air heating or cooling system.
The fan can be set to On to allow air circulation through the building. This is useful if the
air in the room is stale or if circulating cool air from a basement throughout a home can
reduce the temperature in the upper floor without operating the cooling equipment.