T Therm Geo TST-***, Инструкция по установке и эксплуатации

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12/03/2012
32 GI301
Field Setup Overview
Thermostat
Connect all the standard heat pump connections. This will require 10 conductor thermostat cable.
This thermostat wire should be routed through the knockout on the left side of the cabinet by the box containing
the GEO Logic controller using the proper strain relief.
Terminals are as follows:
E – emergency/auxiliary heat
R – 24 volt ac power from TTERM GEO heat pump
G – constant fan
O – Activates the reversing valve for cooling mode
Y – 1
st
stage compressor
W2- starts the auxiliary heat sequence of operation
Y2 – 2
nd
stage compressor
C/X – 24 volt ac common from TTHERM GEO heat pump
L – Hard Lockout signal from TTHERM GEO heat pump
HUM – stat terminal relating to a thermostat with humidistat function (not functional on TST models).
T2-TT-INT-1 – (dual fuel/utility control
this is a separately mounted box with pigtail cable that plugs into
the main GEO Logic controller.
Applies to dual heat/dual fuel application and Split models. The enclosure is 6”W x 10”L x 3”D with 8-
foot cable for plugging into GeoLogic board (J4, top center). In addition to the traditional Utility
Receiver 2 blue wires, there are 5 LED’s (R, status-LMC/-L/-E, backup heat, blower-Y, stat-W2). This
module also has the basic 6-position gas/oil furnace terminal block (R, W, G, C, Y, Y2). This design
includes proper 24-volt isolation from the gas furnace transformer R.
See T2-TT-INT-1 installation instructions in the box placed inside cabinet.
1. The electrical diagram in the back of this manual is very self-explanatory.
2. This interface module will not operate without 24 volts from the furnace or fan coil.
3. Pay close attention to the color of the wires and where each one is connected.
4. The wires and connector to connect the interface module to the GEO Logic controller are located inside the
interface module cabinet.
5. Thermostat wire containing 6 wires is needed to connect the interface module to a furnace or fan coil.
6. The utility load control is connected across the Blue & Blue/White wires. These wires are connected together
with a wire nut. The utility control relay will take the place of the wire nut.
NOTE
Temperature Sensors
Temperature sensors installed in TTHERM GEO heat pumps
are NOT thermisters
. They are digital devices
calibrated at the manufacturer. They are polarity sensitive. Be sure to connect the red and white wires in their
correct shared terminals. The black wire is the data stream wire and will have its own screw terminal.
WARNING
THE DUCT SENSOR (ST)
MUST BE INSTALLED ON ALL FORCED AIR MODELS.
Duct Sensor (ST) –
install in the furnace supply air plenum, at least 24 inches (61cm) above the top of the
furnace (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 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.
 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” (30.5cm) away from any line voltage wiring, romex, etc.
 If you must cross line voltage, the lines must cross at a 90

angle.