WattMaster VAV Systems - Manual (Page 6)

Technical Guide
Systems 6
Networked Multiple Loop System
The Networked Multiple Loop system is used when you have more
than 59 WMVAV controllers and/or Add-on Device controllers or are
using multiple WMVAV controllers that are connected to VAVBOX
controllers. These groups of controllers are broken up into multiple
“Local Loops” which connect to each other via the “Network Loop”.
Each individual MiniLink PD handles its specific local loop’s commu-
nications requirements. The CommLink communications interface
handles all the communications between the individual MiniLink PDs
to form the network loop. Up to 60 local loops can connected together
with this configuration. This provides the capability for over 3500 con-
trollers to be networked together.
If you have more than 59 WMVAV and or Add-on Device controllers or
multiple WMVAV controllers that have VAVBOX controllers you must
split them into separate local loops with no more than 59 controllers
total on each local loop and only 1 WMVAV with VAVBOX controllers
on each loop. Each loop must have its own MiniLink PD. To create this
system simply connect the controllers together on each local loop in a
daisy chain fashion using WattMaster communications wire or 18 gauge
2 conductor twisted pair with shield wire (Belden #82760 or equiva-
lent). These loops are then connected to the system communication
devices. The Networked Multiple Loop systems require that 1
CommLink and 1 MiniLink Polling Device per local loop are pur-
chased and wired into the communications loop. The required
CommLink and 1 MiniLink Polling Device are available as a kit by
ordering the OE715-VAV WMVAV System Package. The other
MiniLink PDs for each local loop are ordered individually. The
MiniLink PDs on the system are connected together in daisy chain fash-
ion between their network loop terminals by using WattMaster commu-
nications wire or 18 gauge 2 conductor twisted pair with shield wire
(Belden #82760 or equivalent). The first MiniLink PD on the network
loop also connects to the CommLink using 18 gauge 2 conductor twisted
pair with shield wire. Programming and status monitoring are accom-
plished by selecting and installing an operators interface. For most
controllers, any one of the operators interfaces can be used for system
programming and monitoring or two or all three can be used together if
desired. The exception to this is when any Add-on Devices are used.
The Add-on Devices must be programmed with a PC using the Watt-
Master VAV Prism software, they cannot be programmed with the Sys-
tem Manager or the Modular Service Tool. See the section titled “Op-
erators Interface Options” below for a list and block connection dia-
grams of the operators interface options available along with their capa-
bilities and limitations. For actual detailed wiring and connection dia-
grams of the Networked Multiple Loop systems see pages 13, 14 and
15.
Operators Interface Options
Service Tool
The Service Tool provides complete programming and monitoring ca-
pabilities for the controllers. It can be connected to any controller on
the loop. The Service Tool connects to the controller by means of a
modular cable with DIN connectors. It is normally used to program and
service the unit and then is removed by the service person upon comple-
tion of these tasks. The Service Tool is not designed for permanent in-
stallation. Generally the service person would only connect it when ser-
vicing or reprogramming the controller. For this reason if continuous
monitoring of the controllers is required, it is better to select a System
Manager or an on site PC for programming and monitoring. The Ser-
vice Tool can be used in conjunction with the other operators interfaces
if desired.
System Manager
The System Manager provides programming and monitoring of the con-
trollers in a package that is designed for permanent wall mounting in
the space or an equipment room. It is housed in an off white plastic
housing that is suitable for most decors. The System Manager is also
provided with alarm and override LED indicators on its faceplate.
.
Personal Computer With Prism Software
A computer interface can also be used in conjunction with the other
operators interfaces listed above, or by itself. The PC used can be a
laptop or desktop computer. WattMaster VAV Prism software must be
installed on the PC. WattMaster VAV Prism Software is available free
of charge at our website, www.wattmaster.com. If remote connection
via a phone line is required you must also purchase and install a Remote
Link. For remote computer connection via an intranet or Internet you
would purchase and install the IP-Link instead of the Remote Link.
Both an on-site and remote PC can be used together if desired.
The personal computer to be used with the Orion Prism software must
meet or exceed the following specifications:
• IBM™ Compatible Computer
• Pentium 200 MHz or Faster Microprocessor
• 64 Meg RAM
•
Windows 95 / 98 / ME / XP / 2000/ NT
• Super VGA Monitor w/ 1024 x 768 Resolution Minimum
• Available Serial Port for On Site Installations
• Internal or External Modem for Remote Installations
• Network Card for TCP/IP Communications
A PC with Prism installed provides features not available with the other
operators interfaces:
• Trend logs can be exported for easy use into any standard
spreadsheet/database program
•
Automatic installation
• Alarm logs are maintained on disk
• E-mailing of alarms
• History logs of user interactions with the system
• On site or remote modem or TCP/IP communications
• User programmable descriptions for every piece of
equipment
• User definable passcode levels for setpoints
• Current status printouts
• User defined custom screens for floor plans, etc.
•
Tenant log creation for tenant override Billing
• Automatic retrieval of trend logs
Communication Device Options
All Networked Multiple Loop systems require that you have
1CommLink per system and 1MiniLink PD for each local loop installed
on the system for correct operation. Other optional communication de-