tekmar 512 Programmable Thermostat Installation User Manual

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D 512 - 09/09

STEP FIVE

WIRING THE THERMOSTAT

(Refer to the examples on the following pages.)

24 V (ac) power

Connect the 24 V (ac) power to the R and C terminals (1 and 2) of the thermostat. This
connection provides power to the microprocessor and display of the thermostat.

Auxiliary Sensors (S1 and S2)

Either an indoor, slab, or remote sensor may be connected to the S1 input. Connect the
two wires from the auxiliary sensor to the Com and S1 terminals (3 and 4).

Either an indoor, slab, or outdoor sensor may be connected to the S2 input. Connect the
two wires from the auxiliary sensor to the Com and S2 terminals (3 and 5).

Heat 1

The Heat terminals (6 and 7) are an isolated output. There is no power available on
these terminals from the thermostat. These terminals are to be used as a switch for a
24 V (ac) circuit. This circuit can operate a low current 24 V (ac) device directly or an
external relay to enable a line voltage 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 current 24 V (ac)
device directly or an external relay to enable a line voltage or high current device.

STEP SIX

INSTALLING THE FRONT COVER

Align the hinges on the bottom of the front cover with the bottom of the thermostat mounting
base. Pivot the front cover around the bottom hinges and push the top against the mounting
base until it snaps firmly in place.

Pivot front

cover around

bottom hinges

Align hinges

on bottom

of front cover

Item

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.