Orion System VCM Component - Manual (Page 34)

Component & System Wiring 34
VCM Controller Wiring Detail
OA, SA and RA Temperature Sensors
GND
INPUTS
GND
AOUT1
AOUT2
GND
+VDC
AIN1
AIN2
AIN3
AIN4
AIN5
AIN7
Mount In HVAC
Unit Supply
Air Duct
Mount In HVAC
Unit Return
Air Duct OE331-21-VCM
VCM Controller Board
OE231
Supply Air Temperature Sensor
(See Caution Note Below Regarding
Connection Location)
OE231
Return Air Temperature Sensor
FILENAME
DATE: B. Crews
DESCRIPTION: PAGE
DRAWN BY:
JOB NAME
OVCM-OA-SA-RASnsr-Wr-1A.CDR
1 of 2
Caution:
If your HVAC unit is supplied with the MODGAS II controller with or without an MHGRV II controller, the Supply Air Temperature
Sensor must always be wired to the MODGAS II controller. If your HVAC unit is supplied with only the MHGRV II controller, the
Supply Air Temperature Sensor must be connected to the MHGRV II controller.
If you have either of these controllers on your HVAC unit and connect a Supply Air Temperature Sensor to the VCM controller,
your controls will not function correctly. Only one Supply Air Temperature Sensor can be used on each HVAC unit.
See the Miscellaneous Diagrams & Technical
Information section in the back of this manual for detailed connection diagrams when using MODGAS II or MHGRV II controllers.
02/28/06
OE250
Outdoor Air
Temperature Sensor
Make Splice Connections
Inside Sensor Enclosure
As Shown. Seal All Conduit
Fittings With Silicone Sealant.
Mount Sensor Outdoors
In Shaded Protected
Area & In Upright
Position As Shown
Outdoor Air, Return Air & Supply Air Temperature Sensor Wiring