Table of Contents
Advertisement
Buffer Tank Sensors:
Included with this buffer tank controller are two sensors. One buffer tank sensor (BT) and one outdoor sensor
(OT). The Outdoor Sensor (OT) and the buffer tank temperature (BT) sensor are wired into a common
connection plug. Below is instruction and a description of each:
Outdoor Sensor (OT)
Extend OT 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.
Buffer Tank Temperature (BT) Sensor
Install the Buffer Tank Temperature (BT) Sensor in the buffer tank. To obtain an accurate temperature sample,
the sensor should be placed in the center of the tank. If the temperature sensor is being installed in an Electro
Industries buffer tank, the location of the tank fittings ensure the sensor is properly located. For easy sensor
cable disconnect and reconnect, the control board is equipped with a plug-in 4-place terminal block.
Temperature Sensor Plug
Before disconnecting the temperature sensor wires from the sensor plug, you will notice two red wires are under
the red screw and two white wires is under the COM screw. The black wire carries data information from each
sensor and must be connected to the appropriate OT (Outdoor Temperature) or ST (Buffer Tank Temperature)
screw. The sensor has a specific polarity and is sensitive to incorrect voltage, so it must be protected from
incorrect voltages. Do not cross connect or inadvertently short out sensor wires with power on. Permanent
sensor damage may result. If the installation requires you to disassemble and reassemble the wiring to the plug,
take great care duplicate the original wiring exactly.
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) wire length.
• 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.
Controller Setup
02/22/2012
5
HI114
Advertisement
Table of Contents
