AUX EL Series Instruções de Operação descarregar pdf (Página 26)

09/11/2014 24 NI401

Temperature Sensors

WARNING

BOTH MUST BE INSTALLED ON ALL MODELS.

Duct Sensor (ST) – install in the Geo supply air plenum, at least 24” (61 cm) above the strip heat element

(airflow inches). The ST sensor does not have an end cap; the small black electronic part just within the tube

end is the actual temperature sensor. It is desirable for the air coming out of the coil to pass as close as possible

to the black tip without warm-up or dampening delay. For best results, the sensor should be positioned in the

maximum warm air stream.

Other Sensor Related Comments

If additional cable length is required, you must use the following rules for extending the cable.

 Use unshielded (low capacitance, preferred twisted) 3 or 4-wire low voltage cable.

 50 (15 meters) feet is maximum (total).

 Do not, under any circumstances, use leftover wires within the normal thermostat cable.

 Route the sensor cable making sure you do not crimp, cut, staple, or damage the cable in any way.

 Keep sensor cables at least 12” (30 cm) away from any line voltage wiring, romex, etc.

For easy sensor cable disconnect and reconnect, the WarmFlo board has a plug-in 4-place terminal block.

Before disconnecting, you will notice two red wires are under the red screw and two white wires is under the

COM screw. The black wire represents the data information from each sensor and must be connected to the

appropriate OT or ST screw.

The sensor has polarity, is sensitive to incorrect voltage, and must be protected from static voltage. Do not cross

connect or inadvertently short out sensor wires with power on. Permanent sensor damage may result.

Gas furnace – if this is a “dual fuel” installation including a gas or oil backup furnace, only two wires are

required between this controller and the gas furnace terminal block. It is assumed the gas furnace will take care

of its own blower based upon a gas-W heat call and the Geo unit blower is off when this controller is in standby

or gas mode.

EZGEO Gas Furnace

W W

C Common

Comment: The “G” wire between this controller and the Geo unit may or may not be the correct connection. If

the Geo unit blower is in continuous air with gas furnace running that may not be desirable. At the top of the

EZGEO board are three tabs relating to standby/electric mode. If there is a desire to interrupt this “G” wire

during standby, route this wire through the COM and EL tabs.

Outdoor Sensor (OT) – extend sensor to an outdoor location properly sampling

the outdoor temperature. Select a location away from direct sunlight and where

the sensor will not pick up false temperature from the heat pump outdoor unit,

refrigerant line sets, dryer vent, reflection off of steel siding, etc. Do not install

the sensor in any type of enclosure, as this will falsely trap and pick up radiant

sun temperature. Mount the sensor horizontally on the structure using the

screws provided.

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AUX EL Series Instruções de Operação Página 26