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in the cabinet. The sensor is connected to the unit controller as
indicated in the wiring diagram with 18 AWG (American Wire
Gage) shielded wire. Do not run the sensor wiring in the same
conduit as high voltage wiring.
A zone temperature sensor (ZS) may be provided as an ac-
cessory with units that have ordered the space temperature
override control function. The ZS should be installed in the
space and connected to the unit controller at the Rnet connec-
tion as shown in the wiring diagram. See Tables 8 and 9 for
Rnet wiring specifications.
Use the specified type of wire and cable for maximum sig-
nal integrity. See Table 8.
To wire the sensor to the controller:
1. Partially cut, then bend and pull off the outer jacket of the
Rnet cable(s), being careful not to nick inner insulation.
2. Strip about
1
/
in. of the inner insulation from each wire.
4
See Fig. 11.
3. Wire each terminal on the sensor to the same terminal on
the controller. Table 9 shows the recommended Rnet wir-
ing scheme.
.25 IN.
INNER INSULATION
Fig. 11 — Rnet Cable Wire
Table 8 — Rnet Wiring Specifications
RNET WIRING SPECIFICATIONS
DESCRIPTION
CONDUCTOR
MAXIMUM LENGTH
RECOMMENDED COLORING
UL TEMPERATURE
VOLTAGE
LISTING
LEGEND
AWG — American Wire Gage
CMP
— Communications Plenum Cable
NEC
— National Electrical Code
UL
— Underwriters Laboratories
Table 9 — Rnet Wiring
WIRE
RED
BLACK
WHITE
GREEN
NOTE: The wire should be connected to the terminal shown.
Step 9 — Open Exhaust Damper (Units with
Optional Exhaust or Energy Conservation
The optional exhaust damper is secured to
Wheel Only) —
the exhaust assembly for shipping. Remove the two screws
holding the damper to the panel. Damper should be free to
swing open during operation. See Fig. 12.
OUTER JACKET
a50-8443
4 conductor, unshielded, CMP,
plenum rated cable
18 AWG
500 ft
Jacket: white
Wiring: black, white, green, red
32 to 167 F
300-vac, power limited
UL: NEC CL2P, or better
TERMINAL
+12-v
Rnet–
Rnet+
Gnd
Fig. 12 — Optional Exhaust Damper
Step 10 — Install all Accessories —
the factory-installed options have been adjusted, install all of
the field-installed accessories. Refer to the accessory installa-
tion instructions included with each accessory.
Step 11 — Configure Controls —
troller is pre-configured with default set points as detailed be-
low. If changes to the set points are desired, this may be accom-
plished via Equipment Touch™ device. See Fig. 13. The pass-
word is 1111. See the Controls and Troubleshooting Book.
SEQUENCE OF OPERATION
100% OUTDOOR AIR UNITS — 62X — The 62X unit is
designed to condition 100% outdoor air to room neutral condi-
tions for ventilation purposes. As such, the 62X unit is not de-
signed to, nor will the 62X unit maintain space cooling, heating
or relative humidity conditions. A separate ancillary device
must be installed to provide primary space heating, cooling,
and humidity control.
The controller is turned on by a switch located on its front,
upper left corner. Several Occupancy Control options are avail-
able for starting the unit. These can be selected from the Equip-
ment Touch display pad on the Controls screen (requires user
password). The Resident Program has an adjustable scheduler
that uses the internal time clock to allow for separate Sequenc-
es for Occupied and Unoccupied periods. This can be accessed
from the Equipment Touch display pad on the Schedules
screen (requires user password).
NOTE: All temperature-related events have an additional 10-
second (fixed) "delay on make" to allow temperatures to settle.
OCCUPIED MODE — When the Equipment Touch Sched-
ule calls for the start of the Occupied mode, and the controller
has verified that there are no fault or shutdown conditions, after
a 30-second (fixed) delay the unit goes into Occupied mode.
Outdoor Air Damper (OD) — After the unit goes into Occu-
pied mode, the Outdoor Air (OA) damper will open. As the
OA damper opens, the Outdoor Air Damper Actuator (OADA)
auxiliary switches close. The OA damper stays open until the
system reaches the end of the Occupied mode period. It will re-
main open until the supply fan turns off. After the supply fan
turns off, the OA damper will close.
Supply Fan (SF) — The SF Air Monitoring Station (SF-AMS)
is included to monitor the SF air flow only. As the OA damper
opens, the OADA auxiliary switch (adjustable) will close and
the SF will turn on. The SF shall operate continuously while
the unit is in the Occupied mode. When the system reaches the
end of the Occupied mode period, the SF will continue to run
for an additional 2 minutes before turning off.
27
A62-788
A62-788
After all of
The unit con-
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