82
SS-SVX11K-EN
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ppoowweerr iiss pprreesseenntt wwiitthh aa vvoollttmmeetteerr..
Wire the sensor in accordance with field connection
diagram, numbers 2307-9122 (for 20-60) and 2307-9144
(for 80-120). As shipped from the factory, a resistor
(7R1) is installed on terminal board 1TB8 terminals 5 &
6). Remove this resistor when the sensor is installed.
Shielded cable (Belden 8760 or equivalent) must be
used when wiring the sensor to the terminal board
inside the unit’s control panel.
When the sensor is installed, it serves two functions;
• It sends the supply air temperature to the master
energy controller (MEC), in the form of an analog
input, to assist in the rate at which the system
changes the space temperature. By offsetting the
actual zone thermostat setpoint, up or down, the
MEC can closer control the zone comfort level.
• It serves as a low limit for the system when the
supply air temperature reaches too high a delta tee
between the actual supply air temperature and the
zone temperature to help prevent overshooting of
the zone thermostat setpoint.
EVP Chiller Control
Each unit ordered for EVP Chiller applications (digit 9 in
the model number), is shipped with the following
controls:
• EVP Remote Panel w/ W7100G Controller
• Freezestat (6S12)
• Chiller Water Temperature Sensor (6RT2)
• Freezestat Bulb well
• Chilled Water Temperature Sensor Well
The installation of the freezestat bulb well, freezestat
bulb, and the chilled water temperature sensor was
discussed in the “Chilled Water Piping” section. Refer
to that section for their installation locations and
dimensional data.
The chiller control (located in the remote panel)
controls the system operation by responding to the
leaving water temperature. The remote panel must be
mounted indoors and within 20 feet of the chiller.
Figure below illustrates the remote panel dimensional
data, the component locations, the locations for the
ship-with items, grounding lugs, and the field
connection terminal board 6TB9. Refer to the field
connection diagram illustrated in Figure 57, p. 83 (20 to
60 ton units) and Figure 58, p. 84 (80 to 120 ton units)
for the interconnecting points between the remote
panel and the unit’s control panel.
Figure 56. EVP chiller remote panel
19.4”1” 1”
1.25”
12.5”
1.25”
Freezestat
BulbwellTemperature
Sensor
15.000
REF
RESISTORS
21.4”
6
U11
6S12
6T2
LOAD
LINE
6TB9
8
7
6
GND
TR
TR
12
1
IInnssttaallllaattiioonn EElleeccttrriiccaall
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