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 © 2009 

  D 512 - 09/09

AUXILIARY SENSORS

The thermostat has a single built-in sensor to measure air temperature at the thermostat. In 
addition to the built-in sensor, the thermostat has terminals to connect up to two separate 
sensors. These sensors can be either indoor sensors, slab sensors, a remote sensor, or 
an outdoor sensor.

Indoor Sensor

An indoor sensor is used to measure the air temperature in the zone that the thermostat 
is controlling. The temperature being read by the indoor sensor is used in the calculations 
of the on times for the relay(s) in the thermostat. Either one or both of the auxiliary sensor 
inputs can be configured for indoor sensors. This setting is made through the Adjust menu 
of the thermostat. If more than one sensor, either the built-in sensor or an auxiliary sensor 
set as an indoor sensor, is being used to measure the zone temperature, the temperature 
of the active sensors is averaged and used to calculate the on time of the relay(s).

Slab Sensor

A slab sensor is used to measure the slab temperature in the zone that the thermostat 
is controlling. The temperature being read by the slab sensor is used in the calculations 
of the on time for the Heat relay and allows the thermostat to operate the slab between 
the slab minimum and slab maximum settings. If more than one slab sensor is used, the 
slab temperatures are averaged by the thermostat.

Remote Sensor

A single remote sensor can be connected to the thermostat. The temperature 
measured by a remote sensor does not affect the on time of the relays and is only 
used for display purposes.

Outdoor Sensor

A single outdoor sensor can be connected to the thermostat. The temperature measured 
by an outdoor sensor does not affect the on time of the relays and is only used for display 
purposes.

ACCESS LEVELS

The tekmar Programmable Thermostat has two 
access levels. These access levels restrict the 
number of items available in the menus of the 
thermostat. The two access levels are User and 
Installer. This selection is made using the DIP 
switch located on the circuit board inside the 
thermostat.

The Installer access level allows the installer to 
adjust all of the settings in the thermostat including 
those required to match the thermostat to the 
mechanical system and the devices used.

The User access level allows the end user to 
adjust the time, temperatures and schedules used 
by the thermostat.

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Made in Canada Mee

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Summary of Contents for D 512

Page 1: ...on pg 1 Display Symbols pg 2 General pg 2 3 Sequence of Operation pg 4 6 Type 512 Two Stage Heating pg 4 Type 512 Heat Cool pg 5 6 Menus pg 6 10 View Menu pg 6 Adjust Menu pg 7 10 Error Messages pg 11...

Page 2: ...ing relay s the thermostat ensures that the relay s remains on or off for a minimum amount of time In order to prevent short cycling of the Cool relay the minimum cooling on time and minimum cooling o...

Page 3: ...eat relay and allows the thermostat to operate the slab between the slab minimum and slab maximum settings If more than one slab sensor is used the slab temperatures are averaged by the thermostat Rem...

Page 4: ...ted to satisfy the requirements of the air sensor Slab Sensor Only Operation When operating with only a slab sensor the on times for the Heat 1 and Heat 2 relays are calculated to satisfy the requirem...

Page 5: ...s requirements In this situation heating and cooling can happen at the same time to prevent the space from overheating This is most likely to occur when the slab is operating at the slab minimum tempe...

Page 6: ...cooling setpoint When operating in the Cool mode there is no interlock between the heating and cooling temperature View Menu 1 of 1 ROOM TARGET The current desired air temperature for the space This...

Page 7: ...an active slab sensor OFF 34 to 122 F OFF 1 0 to 50 0 C ROOM HEAT WAKE Desired temperature for heating during Wake Must have an active air sensor and be set to either Heat or Auto 35 to 100 F 1 5 to...

Page 8: ...o 35 to 100 F 1 5 to 38 0 C ROOM COOL Sleep Desired temperature for cooling during Sleep Must have an active air sensor and be set to either Cool or Auto 35 to 100 F 1 5 to 38 0 C SLAB MINIMUM Wake Mi...

Page 9: ...built in sensor is functional or not This item is only available in the Installer access level OFF ON HEATING CYCLE Determines the number of cycles per hour for the heating equipment This item is onl...

Page 10: ...y available in the Installer access level 0 30 to 10 00 min Adjust Menu 4 of 4 EARLY START Selects whether or not the Early Start feature is active This item is only available in the Installer access...

Page 11: ...ernal sensor and use an auxiliary sensor set to INDR or replace the thermostat After the fault is corrected press any button to clear the error message SENSOR 1 SHORT The auxiliary sensor connected to...

Page 12: ...floor Do not mount the thermostat in a location that may be affected by localized heat sources or cold drafts It may be necessary to install a draft barrier behind the thermostat to prevent air from...

Page 13: ...age or high current device Heat 2 Cool The Heat 2 Cool terminals 8 and 9 are an isolated output There is no power available on these terminals from the thermostat This circuit can operate a low curren...

Page 14: ...User 2 Stage Heat Cool Made in Canada Meets Class B Canadian ICES FCC Part 15 Power 24 V 10 60 Hz 3 VA Relay 24 V ac 2 A Class 2 938 02 512 Switch Settings Installer User 2 Stage Heat Cool Made in Ca...

Page 15: ...ne Pump 24 V ac Class 2 Transformer Made in Canada Meets Class B Canadian ICES FCC Part 15 Power 24 V 10 60 Hz 3 VA Relay 24 V ac 2 A Class 2 938 02 512 Switch Settings Installer User 2 Stage Heat Coo...

Page 16: ...FCC Part 15 T T 1 2 L N M Stage 2 Zone Valve 24 V ac Class 2 Transformer Stage 1 Zone Pump Typical Powered Relay Two Stage with Zone Pump and Zone Valve Power 24 V 10 60 Hz 3 VA Relay 24 V ac 2 A Cla...

Page 17: ...Part 15 2 1 8 7 3 4 5 6 2 1 8 7 3 4 5 6 Stage 2 Zone Pump Stage 1 Zone Pump 24 V ac Class 2 Transformer Unpowered Relay Unpowered Relay Power 24 V 10 60 Hz 3 VA Relay 24 V ac 2 A Class 2 938 02 512 S...

Page 18: ...2009 D512 09 09 18 of 20 Notes...

Page 19: ...19 of 20 2009 D512 09 09 Notes...

Page 20: ...g from ownership or use of the product or from defects in workmanship or materials including any liability for fundamental breach of contract The pass through Limited Warranty applies only to those de...

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