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© 2009
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
1
2
Menu
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.
Summary of Contents for D 512
Page 18: ...2009 D512 09 09 18 of 20 Notes...
Page 19: ...19 of 20 2009 D512 09 09 Notes...
