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Installation & wiring, Suction pressure transducer wiring, Sa e-bus controller technical guide 22 – Orion System SA E-BUS Controller User Manual

Page 22: Suction pressure transducer, Zone, Sa expansion module, Warning

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Zone

Zone

Installation & Wiring

SA E-BUS Controller Technical Guide

22

Figure 18: OE275-01 – Suction Pressure Transducer Wiring

Suction Pressure Transducer

The OE275-01 Suction Pressure Transducer always wires directly to
the Digital Scroll Compressor Controller. See Figure 18 below for
wiring details.

The Suction Pressure Transducer is used to measure suction pressure
at the HVAC unit’s DX evaporator coil suction line. This suction line
pressure is converted to saturated refrigerant temperature by the SA E-
BUS Controller. This temperature is used by the SA E-BUS Controller
to accurately control the compressors and reheat cycle components to
provide optimum performance from the system during Dehumidifi ca-
tion operation.

Suction Pressure Transducer Wiring

Note:
1.) Suction Pressure Transducer(s) Are Only Required
For Installations With The Dehumidification Option
Installed.

2.) Modulating Cooling Output Voltage Must Be
Configured For 1.5 - 5 VDC Operation When You Are
Setting Up The SA Controller Operating Parameters
For A Copeland Digital Compressor.

Caution:
1.) The Schraeder Port Used For
Installation Of The Suction Pressure
Transducer Should Be Located In A
Vertical Portion Of The Suction Line To
Prevent Refrigerant Oil From
Accumulating In The Sensor.

Modular Cable

Connect To SA E-BUS

Controller

Modular Cable

Connect To Expansion

Module (When Used)

24 VAC

GND

10 VA Minimum Power Required

For SA Expansion Module

WARNING!!

Observe Polarity! All boards must be wired with GND-to-GND and 24VAC-to-24VAC.
Failure to observe polarity will result in damage to one or more of the boards. Expansion
Module must be wired in such a way that the expansion module and the controller are
always powered together. Loss of power to the expansion module will cause the
controller to become inoperative until power is restored to the expansion module.

SA Expansion

Module

Splice Wire As Required To Reach
From Transducer Location To
Expansion Module Location

BK

BK

RD

RD

WH

WH

OE275-01

Suction Pressure Transducer

OE275-01

Suction Pressure Transducer

Wiring For Single
Cabinet Unit

Additional Wiring
For Dual Cabinet
Units

RELAY CONTACT
RATING IS 1 AMP
MAX @ 24 VAC

RELAY 2

RELAY 1

RELAY 3

RELAY 4

RELAY
COMMON

I2C

EXPANSION

I2C

EXPANSION

AO1 = BUILDING PRESSURE CONTROL VFD OR

DAMPER ACTUATOR (0-10 OR 2-10 VDC)

= MODULATING HEATING SIGNAL

(0-10 VDC OR 2-10 VDC)

= MODULATING COOLING/DIGITAL SCROLL

SIGNAL (0-10 VDC, 2-10 VDC OR 1.5-5 VDC)

= RETURN AIR DAMPER ACTUATOR

(0-10 VDC)

= RETURN AIR BYPASS DAMPER ACTUATOR

(0-10 VDC)

= GROUND FOR ANALOG OUTPUTS
= GROUND FOR ANALOG OUTPUTS

AO2

AO3

AO4

AO5

GND

GND

BI1 = HOOD ON - N.O. INPUT

BI2

BI3

BI4

BI5

BI6

BI7

BI8

= DIRTY FILTER - N.O. INPUT
= PROOF OF FLOW - N.O. INPUT
= REMOTE FORCED OCCUPIED - N.O. INPUT
= REMOTE FORCED HEATING - N.O. INPUT
= REMOTE FORCED COOLING - N.O. INPUT
= SMOKE DETECTOR - N.C. INPUT
= REMOTE DEHUMIDIFICATION - N.O. INPUT

ANALOG INPUT

JUMPER SETTINGS

MUST BE SET AS

SHOWN FOR

PROPER

OPERATION

24 VAC POWER ONLY

WARNING! POLARITY MUST BE

OBSERVED OR THE BOARD

WILL BE DAMAGED

www.orioncontrols.com

AI1

AI2

AI3

AI4

THERM

THERM

THERM

THERM

4-20mA

4-20mA

4-20mA

4-20mA

0-10V

0-10V

0-10V

0-10V

0-5V

0-5V

0-5V

0-5V

ANALOG INPUT

JUMPER

SETTINGS

RELAY 1 =

RELAY 3 =

RELAY 2 =

RELAY 4 =

IT IS SUGGESTED
THAT YOU WRITE THE
DESCRIPTION OF
THE RELAY OUTPUTS
YOU ARE USING IN
THE BOXES
PROVIDED ABOVE
WITH A PERMANENT
MARKER (SHARPIE®)

WattMaster Label

#LB102034-01

NOTE:
ALL BINARY INPUTS MUST BE 24 VAC ONLY.

AI1 = OUTDOOR AIR RH SENSOR (0-5 VDC)

AI2

AI3

AI4

GND

GND

= INDOOR AIR RH SENSOR (0-5 VDC)
= CO2 (0-10 VDC)
= BUILDING STATIC PRESSURE (0-5 VDC)

= GROUND FOR ANALOG INPUTS
= GROUND FOR ANALOG INPUTS

+V

SIG

GND

PR OUT

GND

SUCTION PRESSURE
TRANSDUCER CONNECTION
FOR HVAC UNITS WITHOUT
DIGITAL COMPRESSOR

TO VCM-X INPUT
TERMINALS AI5 & GND

OE333-23-EM-A VCM-X EXPANSION MODULE

WA

RN

IN

G

OB

SE

RV

E

POLAR

IT

Y

SA

AI1 = ENTERING AIR RH SENSOR (0-5 VDC)

AI2

AI3

AI4

GND

GND

= INDOOR AIR RH SENSOR (0-5 VDC)
= SUCTION PRESSURE A (0-5 VDC)
= SUCTION PRESSURE B (0-5 VDC)

= GROUND FOR ANALOG INPUTS
= GROUND FOR ANALOG INPUTS

AO1 = MODULATING HEATING SIGNAL

(0-10 VDC OR 2-10 VDC)

= MODULATING COOLING STAGE 1 SIGNAL

(0-10 VDC, 2-10 VDC OR 1.5-5 VDC)

= MODULATING COOLING STAGE 2 SIGNAL

(DIGITAL COMPRESSOR ONLY 1.5-5 VDC)

= WSE BYPASS 2A SIGNAL

(0-10 VDC)

= WSE BYPASS 2B SIGNAL

(0-10 VDC)

= GROUND FOR ANALOG OUTPUTS
= GROUND FOR ANALOG OUTPUTS

AO2

AO3

AO4

AO5

GND

GND

ANALOG INPUT

JUMPER SETTINGS

MUST BE SET AS

SHOWN FOR

PROPER

OPERATION

AI1

AI2

AI3

AI4

THERM

THERM

THERM

THERM

4-20mA

4-20mA

4-20mA

4-20mA

0-10V

0-10V

0-10V

0-10V

0-5V

0-5V

0-5V

0-5V

ANALOG INPUT

JUMPER

SETTINGS

RELAY 1 =

RELAY 3 =

RELAY 2 =

RELAY 4 =

IT IS SUGGESTED
THAT YOU WRITE THE
DESCRIPTION OF
THE RELAY OUTPUTS
YOU ARE USING IN
THE BOXES
PROVIDED ABOVE
WITH A PERMANENT
MARKER (SHARPIE®)

NOTE:
ALL BINARY INPUTS MUST BE 24 VAC ONLY.

BI1 = WATER PROOF OF FLOW - A - N.O. INPUT

= WATER PROOF OF FLOW - B - N.O. INPUT
= AIR PROOF OF FLOW - N.O. INPUT
= REMOTE FORCED OCCUPIED - N.O. INPUT
= EMERGENCY SHUTDOWN - N.C. INPUT
= DRAIN PAN OVERFLOW - A - N.O. INPUT
= DRAIN PAN OVERFLOW - B - N.O. INPUT
= DIRTY FILTER - N.O. INPUT

BI2

BI3

BI4

BI5

BI6

BI7

BI8

RELAY CONTACT
RATING IS 1 AMP
MAX @ 24 VAC

RELAY 2

RELAY 1

RELAY 3

RELAY 4

RELAY
COMMON

I2C

EXPANSION

I2C

EXPANSION

24 VAC
POWER ONLY

WARNING!

POLARITY

MUST BE

OBSERVED OR

THE BOARD

WILL BE

DAMAGED

WattMaster Label

#LB102061-A

Rev.: 1C

SA Expansion Module

Orion No.:OE333-23-SA

AAON No.:

R96180