Outdoor Sensor Installation - York ARTTP001S User Manual

INSTALLING an ALSOS001S (SL-ODT) Outdoor tempe-
rature sensor
Introduction :
The ALSOS001S is designed to sense outdoor air tempe-
rature and send this information by digital communications
to the thermostat. The outdoor temperature can then be dis-
played on the thermostat. In heat pump applications with
the ARTTP002S thermostat, it can also be used to control
the balance point and the auxiliary heat lockout tempera-
tures.
Installation of outdoor sensor only :
1 - Install the thermostat according to the instruction
manual. Check that the thermostat is operating. (Display
shows the correct temperature.)
2 - Select a location for the outdoor probe that will give accu-
rate readings. Do not locate the probe where it will be influen-
ced by sunlight. The north side of the building or under the
shadow of the eaves are often good locations. Avoid loca-
tions such as near dryer vents or other sources of heat.
3 - Mount the probe on the outside of the building using the
screw and wall anchor provided so that the tip is well away
from the surface of the wall. The cable may be routed direct-
ly through the wall or bent at the probe and routed along the
surface to enter at a more convenient place.
4 - Locate the sensor box indoor in a controlled air space
near the probe. The cable with the probe is about 1.8 mt
long. Additional 2-conductor cable may be spliced on if
necessary to increase the length.
5 - Open the sensor case by depressing the button on the
bottom edge of the case until the latch releases. Remove
the cover by pulling it out and up at the bottom.
6 - Remove the board from the subbase by pulling back the
latch that holds it at the centre bottom.
7 - Mount the subbase over the wires coming out of the wall
using the two screws and anchors provided. Drill size for the
wall anchors is 1/4 inch. The angled corner on the subbase
should be in the bottom right.
8 - Snap the board back into the subbase. Check to be sure
that the latch holds the board properly.
9 - Strip 6 mm of insulation from the two wires coming from
the probe to the sensor box. Connect the wires to terminals
1 and 2. Polarity is not important on the probe.
10 - Install three-wire cable from the thermostat to the out-
door sensor box. CAUTION : Remove the thermostat from
the subbase while wiring the sensor to prevent damage
from live wires.
11 - Strip 6 mm of insulation from the three wires coming from
the thermostat. Install the wires in the terminals labelled RS2,
RS+V and RS1. Push any extra wire back into the wall cavity.
12 - Note the wire on the thermostat going to each terminal.
13 - Connect the wires on the thermostat subbase to the ter-
minals labelled RS2, RS1 and RS+V. Make sure that each
terminal on the sensor is wired to the terminal with the same
name on the thermostat.
14 - Mount the thermostat on the subbase and check to be sure
that it is showing the temperature. It may take a few seconds to
s t a b i l i z e .
15 - Press the Outdoor button on the thermostat. The out-
14
6 - Remote sensors (cont'd)
door temperature should be displayed with the tree and
thermometer symbol.
16 - Re-install the cover on the outdoor sensor by hooking
it on the top and snapping the bottom into place.
Using multiple sensors :
Only one outdoor sensor may be installed with a thermo-
stat. However, any number from one to six indoor sensors
may also be connected for indoor remote sensing and tem-
perature averaging.
Refer to the instructions with the indoor sensor for connec-
tiong multiple sensors. The outdoor sensor may be connec-
ted with one or more indoor sensors in the same way that
an indoor sensor is wired. The only difference in wiring is
the additional two wires from the probe which go to terminal
1 and 2.
Heat pump applications:
If the sensor is being used with an ARTTP002S thermostat
with auxiliary heat, the thermostat can be configured to
disable the use of auxiliary heat during warm weather and
to lock out the compressor when the outdoor temperature is
too cold. This can make the most efficient use of energy.
At warmer temperatures, a heat pump will operate much
more efficiently than the auxiliary heat. It can save energy
to disable auxiliary heat in some cases; for example, when
returning from setback on a mild day. The temperature
above which auxiliary heat is disabled is the auxiliary lock-
out temperature or high balance point.
Air-to-air heat pumps become less efficient as the outdoor
temperature drops. The temperature at which it becomes
more efficient to use auxiliary heat instead of the heat pump
is the balance point or low balance point.
To display the high and low balance points, while holding
down the outdoor button, press the mode button. The dis-
play will indicate the high or low balance point and the
selected temperature. Press outdoor again to toggle bet-
ween the two settings.
The factory settings allow the use of the heat pump and
auxiliary heat over the entire temperature range of the out-
door sensor.
Adjust either setting using the up and down arrow keys.
Consult a qualified installer or the heat pump manufacturers
instructions for appropriate settings.
CAUTION : Do not set the high balance point below the low
balance point as this will create a 'dead band' with no tem-
perature control.
Troubleshooting :
Display shows two dashes when outdoor button is pressed :
Sensor not connected properly. Check wiring between ther-
mostat and sensor. Check that sensor is not an indoor sen-
sor. Indoor sensor has a thermistor sticking out from the bot-
tom right corner of the board.)