tekmar 521 Programmable Thermostat User Manuals - Manual (Page 4)

© 2014 521_U - 01/14
4 of 8 A Watts Water Technologies Company
Cooling Operation
Cooling is available when the Mode is set to Cool. The thermostat must be configured
for heat/cool/fan operation in order for the cooling operation to available.
To change the cool temperature setting, push the or button to select a preferred
temperature setting for the current schedule time period. The Cool On symbol is
shown on the display when the thermostat is cooling.
To change the temperatures for the other time periods, enter the Set Temp menu by
pressing both the
and buttons together, press Menu to locate the Set Temp
menu, and press PRGM to enter the menu.
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.
The thermostat includes a Hold button. When the Hold button is pressed, the thermostat
stops operating based on the programmable schedule and the hold temperature
can be set using the or buttons. Press the Hold button a second time to cancel
the hold and resume operating based upon the programmable schedule.
Hold Operation
90°F (32°C)
Feels hot to the touch
80 to 85°F (26 to 30°C)
Feels warm to the touch
70°F (21°C)
Feels cool to the touch
40 to 45°F (5 to 7°C)
Feels cold to the touch
Suggested maximum for all floor
types other than wood.
Bathrooms and kitchens. Suggested
maximum for wood floors.
Rooms with large windows preventing
under heating in the evening.
Freeze protection for garages.