Systems overview – WattMaster VAV User Manual

Page 12

Component & System Wiring

General Information

The WattMaster VAV system components can be configured into dif-
ferent types of systems depending on the type and number of control-
lers required. It is a good idea to become familiar with the types of
systems and their architecture by reading the information in this section
and looking at the configuration diagrams in the System Configura-
tions Installation & Commissioning section of this manual. The infor-
mation below is designed to help you understand how the system com-
ponents integrate with each other and the available configuration op-
tions.

System Types

Two different system configurations are available depending on the type
and number of controllers that you have on your system.

Networked Single Loop
(See Pages 6 Through 8 For Connection Diagrams)

Networked Multiple Loop
(See Pages 9 Through 11 For Connection Diagrams)

System Type Definitions

Networked Single Loop
The Networked Single Loop system, as its name implies, consists of a
single communications loop. The system can consist of the following
controllers and devices.

A single WMVAV controller used as a VAV controller and
it’s associated VAVBOXcontrollers. Other WMVAV
controllers used for constant volume units and/or and Add-
on Devices may also be connected as long as the total of all
controllers on the loop does not exceed 59. Only one VAV
controller with it’s VAVBOX controllers can be installed
per loop. If more than one VAV controller with VAVBOX
controllers is required, you must have a separate loop for
each.

This system requires one CommLink communications interface and
one MiniLink Polling Device. Programming and status monitoring are
accomplished by the following methods.

By using an operators interface. This can be either a
Modular System Manager, a Modular Service Tool or both
devices. The System Manager or Modular Service Tool
can connect to any controller on the local loop.

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. The PC connects to the CommLink
via a supplied cable.

Networked Multiple Loop
This Networked Multiple Loop System consists of two or more loops,
each being called ‘Local Loops’, with one ‘Network Loop’ that ties the
“Local Loops” together. Each of these local loops can consist of the
following controllers and devices.

A series of WMVAV controllers for constant volume units
and/or Add-on devices without any VAVBOX controllers.
Up to 59 controllers may be connected on the loop in this
manner.

A single WMVAV controller used as a VAV controller and
its associated VAVBOX controllers. Other WMVAV
controllers used for constant volume units and/or and Add-
on Devices may also be connected as long as the total of all
controllers on the loop does not exceed 59. Only one VAV
controller with its VAVBOX controllers can be installed
per local loop.

To form the Networked Multiple Loop System the following network
devices are required.

A MiniLink Polling Device is required per loop (Local
Loop). This allows the controllers to share information that
is broadcast from one controller to all controllers on that
local loop and also provides alarming and trend logging
capabilities.

One CommLink is required for the entire system. It resides
on the Network Loop and allows for communications
between all the local loops and provides for global
broadcasts to all controllers on the entire system.

Programming and status monitoring are accomplished by one or more
of the following methods.

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 can
connect to any controller on any “Local Loop” on the
entire system.

Network Communications Devices

MiniLink Polling Device

This device is required for all Networked Single loop
systems.

One of these device is required on each local loop of all
Networked Multiple Loop systems

CommLink

One CommLink is required on all Networked Single Loop
or Multiple Loop Systems

Up to 60 local loops can be connected to the CommLink

Installation Procedures

The installation procedures that follow are based on recommended meth-
ods of wiring connection and controller installation. Installation proce-
dures vary depending on the which Networked system you are install-
ing. The system you are installing could be “Networked Single Loop”
or a “Networked Multiple Loop” system. The Networked Systems
also have installation variations based on the type of components you
are installing for that system. The following information explains the
procedures for all of these systems. Please find the system and compo-
nents that closely match your system and follow the outlined proce-
dures.

Systems Overview