tekmar 553 Thermostat Installation - Manual (Page 34)

© 2014 553_D - 09/14
34 of 52 A Watts Water Technologies Company
Sequence of Operation
Heat and Cool Applications Section A
The 553 can operate in several different combinations of conventional and heat pump
applications. Supported conventional heating applications are:
Application RH% Options
1 Heat / 1 Cool / 1 Fan / Relative Humidity Humidification Modes 1, 2, 3
Dehumidification Modes 1, 2, 3
2 Heat / 1 Fan / Humidification Humidification Modes 1, 2, 3
Dehumidification not possible
2 Heat / 1 Cool / 1 Fan None
Supported heat pump applications are:
Application RH% Options
1 Radiant Floor Heat / 1 Heat Pump / 1 Fan None
1 Radiant Floor Heat / 1 Heat Pump / Relative Humidity Humidification Modes 1 or 3
Dehumidification Modes 1, 2, 3
1 Radiant Floor Heat / 1 Heat Pump / Backup Heat None
Heating Operation Section B
Set Heat Temperature ------------------------------------------------ ------------------------------------------------
When using only a room temperature sensor, the thermostat operates the heating
system to maintain the Set Heat Room temperature.
Floor Heating -------------------------------------------------------- --------------------------------------------------------
When using both a room and a floor temperature sensor, the thermostat always maintains
the Floor Minimum temperature, even when the air temperature is satisfied. When the
air temperature is below the Set Heat Room temperature, the thermostat operates the
heating system to maintain the Set Heat Room temperature. The floor is never heated
above the Floor Maximum setting in order to protect the floor covering.
Suggested Floor Maximum settings are 90°F (32°C) for tile, stone, or concrete floors
and 85°F (29°C) for wood floors.