- Data Brochure Programmable Thermostat 512 D 512 09/09 Table of Contents Display / Keypad Operation ............ 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 ........................
Display Symbols Warning Displays when an error exists. Heat One Displays when the heat one contact is on. Access Level Displays when in the user access level. Heat Two Displays when the heat two contact is on. Early Start Displays when the thermostat is in early start. Cool One Displays when the cool one contact is on. General CYCLES PER HOUR (HEAT CYCLE and COOL CYCLE) Cycles Per Hour The thermostat operation is based on cycles per hour.
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.
TWO STAGE HEAT The two stage mode of operation is selected using the DIP switch located on the circuit board inside the thermostat. In cases where a one stage heating system can not provide sufficient heat under all conditions, a second stage of heat can be added to supplement the first stage. A two stage system therefore has one thermostat controlling two output relays. Two Stage Logic The temperature in a two stage zone is controlled by varying the on time of the Heat 1 and Heat 2 relays during a cycle.
HEAT / COOL The Heat / Cool mode of operation is selected using the DIP switch located on the circuit board inside the thermostat. Air Sensor(s) Only Operation When operating with only an air sensor, the on times of the Heat 1 relay and the Cool relay are calculated to satisfy the requirements of the air sensor. Slab Sensor Only Operation When operating with only a slab sensor, the on time of the Heat 1 relay is calculated to satisfy the requirements of the slab sensor.
Heating / Cooling Interlock Time Interlock In order to prevent frequent changes between heating and cooling, the thermostat has a Cooling Interlock setting. Once the Heat 1 relay has been off for a minimum of one heating cycle or the length of the Cooling Interlock, (whichever is longer) cooling is permitted. Temperature Interlock When in the Auto mode, the cooling temperature is limited to 3°F (1.5°C) above the heating temperature.
Adjust Menu (1 of 4) MODE Current mode of operation of the thermostat. OFF, HEAT OFF, COOL, AUTO, HEAT ROOM HEAT (No Schedule) Desired temperature for heating. (Must have an active air sensor and be set to either Heat or Auto.) 35 to 100°F (1.5 to 38.0°C) ROOM COOL (No Schedule) Desired temperature for cooling. (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 (No Schedule) Minimum slab temperature. (Must have an active slab sensor.
Adjust Menu (2 of 4) ROOM COOL Wake Desired temperature for cooling during Wake. (Must have an active air sensor and be set to either Cool or Auto) 35 to 100°F (1.5 to 38.0°C) ROOM COOL UnOcc Desired temperature for cooling during UnOccupied. (Must have an active air sensor and be set to either Cool or Auto.) 35 to 100°F (1.5 to 38.0°C) ROOM COOL Occ Desired temperature for cooling during Occupied. (Must have an active air sensor and be set to either Cool or Auto.) 35 to 100°F (1.5 to 38.
Adjust Menu (3 of 4) SLAB MAXIMUM Maximum slab temperature. This item is only available in the Installer access level. (Must have an active slab sensor.) 34 to 122°F, OFF (1.0 to 50.0°C, OFF) SENSOR 1 Selects the type of auxiliary sensor present in the Sen 1 input. This item is only available in the Installer access level. OFF, Indr, SLAB, REM SENSOR 2 Selects the type of auxiliary sensor present in the Sen 2 input. This item is only available in the Installer access level.
Adjust Menu (4 of 4) COOLING MINIMUM OFF Sets the minimum off time of the cooling contact. This is to prevent short cycling. This item is only available in the Installer access level. 0:30 to 10:00 min. EARLY START Selects whether or not the Early Start feature is active. This item is only available in the Installer access level. OFF, ON LITE Sets the operation of the backlighting of the LCD. ON, Tmpy ON, OFF UNITS The units of temperature used to display the items.
Error Messages (1 of 1) E01 The thermostat was unable to read a piece of information stored in its memory. The thermostat was required to load the factory settings. The thermostat will stop operation until all settings are checked. To clear this error, select the Installer access level and check all of the settings in the Adjust and Schedule menus. E02 There are no active sensors selected on the thermostat.
Installation STEP ONE 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 512 Includes: • One Programmable Thermostat 512 • Data Brochure D 512 • User Brochure U 512 STEP TWO REMOVING THE FRONT COVER Place a screwdriver or similar object into the small slot located in the top of the thermostat.
STEP FOUR ROUGH IN WIRING • 18 AWG or similar wire is recommended for all 24 V (ac) wiring. • All wires are to be stripped to 1/4” (6 mm) to ensure proper connection to the control. • Run wires from the 24 V (ac) power to the thermostat. Use a clean power source to ensure proper operation. • If an auxiliary sensor is used, install the sensor according to the appropriate Data Brochure and run two wires from the sensor to the thermostat. • Run wires from the heating device to the thermostat.
Zone Valve © 2009 D 512 - 09/09 M 24 V (ac) Class 2 Transformer 14 of 20 24 V ± 10% 60 Hz 3 VA 24 V (ac) 2 A Switch Settings: Installer/User 2 Stage/Heat-Cool Cooling Power: Relay: Class 2 938-02 512 Made in Canada Meets Class B: Canadian ICES FCC Part 15 24 V ± 10% 60 Hz 3 VA 24 V (ac) 2 A Switch Settings: Installer/User 2 Stage/Heat-Cool Power: Relay: Class 2 938-02 512 Made in Canada Meets Class B: Canadian ICES FCC Part 15 Wiring Examples WIRING 24 V (AC) POWER AND AUXILIARY SENSORS 1
938-02 Cooling Stage 1 Zone M Valve Stage 2 Zone Valve M 15 of 20 24 V ± 10% 60 Hz 3 VA 24 V (ac) 2 A Switch Settings: Installer/User 2 Stage/Heat-Cool Zone Pump Power: Relay: Class 2 512 938-02 Power: Relay: Class 2 24 V ± 10% 60 Hz 3 VA 24 V (ac) 2 A Switch Settings: Installer/User 2 Stage/Heat-Cool Cooling 512 938-02 512 Made in Canada Meets Class B: Canadian ICES FCC Part 15 T T 24 V ± 10% 60 Hz 3 VA 24 V (ac) 2 A Zone Pump Switch Settings: Installer/User 2 Stage/Heat-Cool Made in C
© 2009 2 1 8 7 Stage 1 Zone Pump D 512 - 09/09 Unpowered Relay Stage 2 Zone Valve M 24 V (ac) Class 2 Transformer 16 of 20 24 V ± 10% 60 Hz 3 VA 24 V (ac) 2 A Switch Settings: Installer/User 2 Stage/Heat-Cool M Power: Relay: Class 2 512 938-02 L N 512 938-02 Stage 1 Zone Pump 24 V ± 10% 60 Hz 3 VA 24 V (ac) 2 A Stage 2 Zone Valve Switch Settings: Installer/User 2 Stage/Heat-Cool 3 4 5 6 Made in Canada Meets Class B: Canadian ICES FCC Part 15 T T Power: Relay: Class 2 1 2 Made in Can
Stage 1 Zone Pump Typical Powered Relay T T 1 2 L N Typical Powered Relay T T L N Stage 2 Zone Pump 17 of 20 © 2009 24 V ± 10% 60 Hz 3 VA 24 V (ac) 2 A Switch Settings: Installer/User 2 Stage/Heat-Cool Stage 2 Zone Pump 512 Stage 1 Zone Pump 938-02 512 Made in Canada Meets Class B: Canadian ICES FCC Part 15 2 1 8 7 Power: Relay: Class 2 3 4 5 6 938-02 1 2 Unpowered Relay 24 V ± 10% 60 Hz 3 VA 24 V (ac) 2 A 2 1 8 7 Switch Settings: Installer/User 2 Stage/Heat-Cool 3 4 5 6 Power: R
Notes © 2009 D 512 - 09/09 18 of 20
Notes 19 of 20 © 2009 D 512 - 09/09
Technical Data PROGRAMMABLE THERMOSTAT 512 Two Stage Heat / Heat-Cool Literature Control Packaged weight Dimensions Approvals Ambient conditions Power Supply Relay Sensors Included Optional D 512, U 512 Microprocessor PI control; This is not a safety (limit) control. 0.46 lb. (210 g), Enclosure J, white PVC plastic 2-7/8” H x 2-7/8” W x 13/16” D (73 x 73 x 21 mm) CSA C US, CSA 22.2 No 24 and UL 873, meets class B: ICES & FCC Part 15. Indoor use only, 32 to 122°F (0 to 50°C), < 90% RH non-condensing.
