Orion System VCM Component - Manual (Page 21)

Component & System Wiring 21
Programming and status monitoring are accomplished by one or more of
the following methods.
1. By using an operator interface. This can be either a
Modular System Manager, a Modular Service Tool or both
devices. The System Manager or Modular Service Tool
connect to any “Local Loop” on the system.
2. A computer interface can also be used in conjunction with
the other operators interfaces listed above, or by itself. This
requires a personal computer with the Prism computer front
end software installed.
Network Communications Devices
MiniLink Polling Device
The MiniLink Polling device is used in the following applications.
1. This device is required on all Zoning applications. It is
optional on single loop VAV systems.
2. This device is required on each local loop of all Networked
Multiple Loop systems
This device is responsible for local loop broadcasts only. It always re-
sides on the local loop.
For a Networked Single Loop VCM system, this device can be used for
tenant logging and alarm reporting to a Modular System Manager. It can
be used to broadcast information like outside air temperature or outside
air humidity to all devices on the local loop. It can also be used to
broadcast space temperature from a GPC Plus or GPC-17 controller to
any controllers on this loop that do not have their own space tempera-
ture sensor.
For a Networked Single Loop VAV system, the MiniLink Polling De-
vice can be used for tenant logging and alarm reporting to a Modular
System Manager. It must be used to broadcast information such as, in-
ternal schedule, supply air temperature, fan and heat status, unoccupied
calls for heating and cooling from the VAV/Zone controllers, and forced
modes of operation.
For a Networked Single Loop Zoning system, this device must be used
for zone voting, because it calculates the heating and cooling totals on
the loop and broadcasts cooling, venting, and heating modes to the VAV
controller. It can also be used for tenant logging and alarm reporting to
the Modular System Manager.
CommLink
The CommLink device is used in the following applications.
1. A CommLink is required on all Networked Multiple Loop
Systems
2. A CommLink is optional on all Networked Single Loop
Systems
3. A CommLink is required on any system when a computer
interface is desired
The CommLink is responsible for local loop broadcasts on a Networked
Single Loop system, and on this type of system, the on board jumper
must be set to “Single”. This device is responsible for network broad-
casts on Networked Multiple Loop systems. On this type of system, the
on board jumper must be set to “Multi”.
For a Networked Single Loop VCM system, this device can be used for
tenant logging and alarm reporting to a Modular System Manager. It can
also be used to broadcast information like outside air temperature or
outside air humidity to all local loops on the entire networked system.
It may also be used to broadcast space temperature from a GPC Plus or
GPC-17 controller to any controllers on the local loop that do not
contain their own space temperature sensor.
On a Networked Single Loop VAV/Zone system, the CommLink can be
used to broadcast information such as, internal schedule, supply air tem-
perature, fan and heat status, unoccupied calls for heating and cooling
and forced modes of operation to and from the VAV/Zone controllers.
System Installation
Wiring Considerations
Before beginning installation, please study the wiring diagrams for the
controllers you are using with your particular application. These dia-
grams appear in this Component & System Wiring Technical Guide and
can also be found in the technical guide supplied with your specific
controllers. Wire and transformer sizing instructions and examples are
located on page 28 through 29 of this manual.
Most of the Orion controllers are equipped with modular connections,
and in some cases are equipped with both modular and wiring terminal
blocks. We recommend (when possible) using modular cables instead
of hard wiring to wiring terminal blocks, to save installation time and
eliminate wiring errors. In some cases, however, hard wiring is un-
avoidable. The table below lists the various Orion devices/controllers
and their available termination type(s) for communications and power
wiring.
Communications And Power Wiring
Terminations For Orion Products
Available Power
And Communications
Connections Orion
Controller Or
Device
Modular
Connectors
Only
Wire
Terminals
Only
Both
Modular
Connectors
And Wire
Terminals
VCM 9
VAV/Zone 9
Power/Comm Board 9
MiniLink PD 9
CommLink II 9
*System Manager 9
GPC Plus 9
GPC-17 9
Lighting Controller 9
* The System Manager is supplied with a pigtail connector that has a modular
plug on one end and stripped wires on the other end. The pigtail is used to
allow wiring connection to the HVAC unit controller wire terminals and to a
24 VAC power transformer on systems that do not use Power/Comm boards.