46
EconoMi$er
R
2 —
The RTU Open controller is used with EconoMi$er2 (option
or accessory) for outdoor air management. The damper
position is controlled directly by the RTU Open controller;
the EconoMi$er2 unit has no internal logic device.
Outdoor air management functions can be enhanced with
field--installation of these accessory control devices:
Enthalpy control (outdoor air or differential sensors)
Space CO
2
sensor
Outdoor air CO
2
sensor
Field Connections
Field connections for accessory sensors and input devices
are made to the RTU Open controller at plugs J1, J2, J4,
J5, J11 and J20. All field control wiring that connects to
the RTU Open controller must be routed through the
raceway built into the corner post as shown in Fig. 31.
The raceway provides the UL required clearance between
high and low--voltage wiring. Pass the control wires
through the hole provided in the corner post, then feed the
wires thorough the raceway to the RTU Open controller.
Connect to the wires to the removable PCB connectors
and then reconnect the connectors to the board.
Space Temperature (SPT) Sensors —
SPT sensors available from Bryant are resistive input
non-communicating (T55, T56, and T59) sensors. These
sensors have a variety of options consisting of: timed
override button, set point adjustment, and a LCD screen.
Space temperature can be also be written to from a
building network or zoning system. However, it is still
recommended that return air duct sensor be installed to
allow stand-alone operation for back-up. Refer to the
configuration
section
for
details
on
controller
configurations associated with space sensors.
S
33ZCT55SPT, space temperature sensor with override
button (T--55)
S
33ZCT56SPT, space temperature sensor with override
button and setpoint adjustment (T--56)
S
33ZCT59SPT, space temperature sensor with LCD
(liquid crystal display) screen, override button, and
setpoint adjustment (T--59)
Use 20 gauge wire to connect the sensor to the controller.
The wire is suitable for distances of up to 500 ft. Use a
three--conductor shielded cable for the sensor and setpoint
adjustment connections. If the setpoint adjustment
(slidebar) is not required, then an unshielded, 18 or 20
gauge, two--conductor, twisted pair cable may be used.
Connect T--55:
See Fig. 46 for typical T--55 internal
connections. Connect the T--55 SEN terminals to RTU
Open J20--1 and J20--2. See Fig. 47.
2
3
4
5
6
1
SW1
SEN
BRN (GND)
BLU (SPT)
RED(+)
WHT(GND)
BLK(-)
CCN COM
SENSOR WIRING
C08201
Fig. 46 -- T--55 Space Temperature Sensor Wiring
SEN
SEN
J20-1
J20-2
C08460
Fig. 47 -- RTU Open T--55 Sensor Connections
Connect T--56:
See Fig. 48 for T--56 internal connections.
Install a jumper between SEN and SET terminals as
illustrated. Connect T--56 terminals to the RTU Open
controller at J20--1, J20--2 and J20--3 per Fig. 49.
2
3
4
5
6
1
SW1
SEN
SET
Cool
Warm
BRN (GND)
BLU (SPT)
RED(+)
WHT(GND)
BLK(-)
CCN COM
SENSOR WIRING
JUMPER
TERMINALS
AS SHOWN
BLK
(T56)
C08202
Fig. 48 -- T--56 Internal Connections
SEN
J20-1
J20-2
SEN
SET
Jumper
J20-3
SET
C08461
Fig. 49 -- RTU Open T--56 Sensor Connections
Summary of Contents for 548J*17 D Series
Page 4: ...4 a548J 015 Fig 2 Unit Dimensional Drawing Size 17 Units ...
Page 5: ...5 a548J 016 Fig 2 Unit Dimensional Drawing Size 17 Units cont ...
Page 6: ...6 a548J 017 Fig 2 Unit Dimensional Drawing Size 17 Units cont ...
Page 7: ...7 a548J 018 Fig 3 Unit Dimensional Drawing Size 24 Units ...
Page 8: ...8 a548J 019 Fig 3 Unit Dimensional Drawing Size 24 Units cont ...
Page 9: ...9 a548J 020 Fig 3 Unit Dimensional Drawing Size 24 Units cont ...
Page 13: ...13 C10139 Fig 7 Roof Curb Details Size 17 Units ...
Page 14: ...14 C10140 Fig 8 Roof Curb Details Size 24 Units ...
Page 19: ...19 a50 9696 Fig 20 548J 17 24 Control Wiring Diagram with VFD Option ...
Page 20: ...20 a50 9697 Fig 21 Typical 548J 17 24 Power Wiring Diagram 208 230V 3 Phase 60Hz unit shown ...
Page 44: ...44 a50 9699 Fig 44 RTU Open System Control Wiring Diagram ...
