Bryant PURON 581J User Manual download pdf (Page 27)

EconoMi$er2 —

The RTU Open control is used with EconoMi$er2 (option

or accessory) for outdoor air management. The damper

position is controlled directly by the RTU Open control;

EconoMi$er2 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

sensor

Outdoor air CO

sensor

Field Connections

Field connections for accessory sensors and input devices

are made the RTU Open, at plugs J1, J2, J4, J5, J11 and

J20. All field control wiring that connects to the RTU

Open must be routed through the raceway built into the

corner post as shown in Fig. 30. 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. Connect to the wires to the removable

Phoenix connectors and then reconnect the connectors to

the board.

Space Temperature (SPT) Sensors —

There are 2 types of SPT sensors available from Bryant,

resistive input non-communicating (T55, T56, and T59)

and Rnet communicating (SPS, SPPL, SPP, and SPPF)

sensors. Each type has a variety of options consisting of:

timed override button, set point adjustment, a LCD

screen, and communication tie in. 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. 38 for typical T--55 internal

connections. Connect the T--55 SEN terminals to RTU

Open J20--1 and J20--2. See Fig. 39.

SW1

SEN

BRN (GND)

BLU (SPT)

RED(+)

WHT(GND)

BLK(-)

CCN COM

SENSOR WIRING

C08201

Fig. 38 -- T--55 Space Temperature Sensor Wiring

SEN

J20-1

J20-2

C08460

Fig. 39 -- RTU Open T--55 Sensor Connections

Connect T--56: See Fig. 40 for T--56 internal connections.

Install a jumper between SEN and SET terminals as

illustrated. Connect T--56 terminals to RTU Open J20--1,

J20--2 and J20--3 per Fig. 41.

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. 40 -- T--56 Internal Connections

SEN J20-1

J20-2

SEN

SET

Jumper

J20-3

SET

C08461

Fig. 41 -- RTU Open T--56 Sensor Connections

581J

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Bryant PURON 581J User Manual Page 27

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