Orion System VCM-X Modular E-BUS - Manual (Page 21)

VCM-X Modular E-BUS Controller Technical Guide
INSTALLATION & WIRING
21
Suction Pressure Transducer Wiring
Suction Pressure Transducer Without
Copeland Digital Scroll™ Compressor
The OE275-01 Suction Pressure Transducer is required for any VCM-X
application with DX Cooling that requires Dehumidifi cation.
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 VCM-
X E-BUS Controller. This temperature is used by the VCM-X E-BUS
Controller to accurately control the compressors and reheat cycle
components to provide optimum performance from the system during
Dehumidifi cation operation.
When used in dehumidifi cation applications on HVAC units without
Copeland Digital Scroll™ Compressors, the Suction Pressure Transducer
wires to the VCM-X Expansion Module as shown in Figure 18 below.
In this application, the Suction Pressure Transducer connects to the
VCM-X Expansion Module plus V, SIG, and GND terminals through
a cable. The cable is supplied with a 3-pin Packard mating connector
for attachment to the sensor on one end and has 3 color-coded stripped
wires on the other end. The stripped wire ends can be spliced to other
wires to extend the wiring length when required.
Figure 18: OE275-01 – Suction Pressure Transducer Wiring (Units Without Copeland Digital Scroll™
Compressors)
Modular Cable
Connect To VCM-X E-BUS
Controller
Modular Cable
Connect To Next Expansion
Board(When Used)
24 VAC
GND
10 VA Minimum Power Required
For VCM-X Expansion Module
Connect PR
OUT To AI5 &
GND To GND
On VCM-X
Controller
When The
Suction
Pressure
Transducer Is
Used
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 Modules must be wired in
such a way that the expansion modules 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.
BK
RD
WH
OE275-01
Suction Pressure
Note:
1.) If Unit Has Dehumidification
Option And Copeland Digital
Compressor
, Wire
Suction Pressure Transducer
Is Not Used
Directly
To VCM-X Expansion Module As Shown.
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.
Note:
1.) If Unit Has Dehumidification Option
And Copeland Digital Compressor Is Used,
Wire Suction Pressure Transducer To
Copeland Controller As Shown On
Following Page.
2.) AO3 Output Voltage Must Be
Configured For 1.5 - 5 VDC Operation
When You Are Setting Up The VCM-X
Controller Operating Parameters For A
Copeland Digital Compressor.
GND
PR OUT
+V
SIG
GND
VCM-X Expansion
Module
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
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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
VCM
WA
RN
IN
G
OB
SE
RV
E
POLAR
IT
Y
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
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
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-A
Rev.: 1L
NOTE:
ALL BINARY INPUTS MUST BE 24 VAC ONLY.
+V
SIG
GND
PR OUT
GND
SUCTION PRESSURE
TRANSDUCER CONNECTION
FOR HVAC UNITS WITHOUT
DIGITAL COMPRESSOR
TO VCM-X INPUT
TERMINALS AI5 & GND
BI1 = EMERGENCY SHUTDOWN - N.C. INPUT
= 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
= HOOD ON - N.O. INPUT
= REMOTE DEHUMIDIFICATION - N.O. INPUT BI2
BI3
BI4
BI5
BI6
BI7
BI8
www.aaon.com
www.orioncontrols.com
VCM-X Expansion Module
Orion No.:OE333-23-EM
AAON No.:
R69190
AI1 = OUTDOOR AIR RH SENSOR (0-5 VDC)
AI2
A3
AI4
GND
GND
= INDOOR AIR RH SENSOR (0-5 VDC)
= ECONOMIZER FEEDBACK
= BUILDING STATIC PRESSURE (0-5 VDC)
= GROUND FOR ANALOG INPUTS
= GROUND FOR ANALOG INPUTS
I