tekmar 511 Programmable Thermostat Installation - Manual (Page 4)

© 2012 D 510 - 02/12 4 of 16
Sequence of Operation
ONE STAGE HEAT
Air Sensor(s) Only Operation
When operating with only an air sensor, the on time for the Heat relay is calculated to
satisfy the requirements of the air sensor.
Slab Sensor Only Operation
When operating with only a slab sensor, the on time for the Heat relay is calculated to
satisfy the requirements of the slab sensor. The thermostat operates to maintain the slab
at the minimum slab temperature setting.
NOTE: Operating with only a slab sensor can lead to either overheating or underheating
of the space.
Air and Slab Sensor Operation
When operating with both air and slab sensors, the thermostat calculates an on time for
the Heat relay to satisfy the slab sensor’s requirements and an on time to satisfy the air
sensor’s requirements. The Heat relay operates for the longer of these two on times.
During light heating loads, overheating can occur due to the minimum slab temperature
requirements.
During heavy heating loads, the maximum slab temperature setting limits the on time of
the Heat relay. In this situation, underheating can occur.
Mode
Heat In the heat mode, the Heat relay is operated to satisfy the temperature requirement
of the zone.
Off In the Off mode, the Heat relay is not operated.
NOTE: If an air or slab sensor is active in the Off mode, a freeze protection is enabled
that allows the Heat relay to be operated to keep the zone above 35°F (2°C).
GETTING READY
Check the contents of this package. If any of the contents are missing or damaged, please
contact your wholesaler or tekmar sales representative for assistance.
Type 510 Includes: •• One Programmable Thermostat 510 •• Data Brochure D 510 •• User
Brochure U 510
Type 511 Includes: •• One Programmable Thermostat 510 •• One Slab Sensor 079 •• Data
Brochure D 510 •• User Brochure U 510