Armstrong The Brain DRV80R User Manual

38
Armstrong International
221 Armstrong Blvd., Three Rivers, Michigan, 49093 - USA
Ph. (269) 279-3602 Toll Free (888) 468-4673 Fax (269) 279-3130
Connectivity
The integral RS485 Serial Port (CN2 on the DRV80 PCB) can be used to connect to either SAGE
®
BS or directly
to Building Automation Systems (BAS) which operates on a Modbus RTU protocol.
See Options screen on page 36 for details on how to switch DRV80 for either SAGE
®
BS or Modbus.
SAGE
®
BS
SAGE
®
BS is an optionally selected control module from Armstrong which enables an interface with Building
Automation Systems (BAS) which utilize Modbus, Bacnet™ or LonWorks™ protocols via the use of specic
ProtoCessor cards.
SAGE
®
BS also has an ethernet port and operates as a web server for remote network access.
SAGE
®
BS includes remote hot water supply, cold / recirculation water supply, blended water outlet temperature
outputs and is supplied with a system graphic, memory card for data storage and web based software.
SAGE
®
BS includes terminals for additional installer supplied RTDs, pressure transducers and pulse type ow
meters and this data can be forwarded via the SAGE
®
BS interface.
A separate SAGE
®
BS specic Installation, Operation and Maintenance (IOM) Guide is available upon
request. Please consult factory or visit:
www.armstronginternational.com/sites/default/les/resources/documents/IOM-690.pdf
Modbus
Modbus – DRV80 can be congured to communicate directly with BAS which utilize Modbus RTU.
When congured for Modbus the DRV80 becomes a Remote Terminal Unit (RTU).
When connected directly to a BAS using Modbus RTU, the DRV80 will be assigned a unique network address
which is programmed via the integral DB9 external port.
A separate Modbus specic Installation, Operation and Maintenance (IOM) Guide is available upon request.
Please consult factory or visit:
www.armstronginternational.com/sites/default/les/resources/documents/IOM-776.pdf
System Performance
For e󰀨ective DRV80 performance, the DRV must be able to experience a minimum ow and a minimum temperature
di󰀨erential between its inlet and outlet supplies when the system is in zero demand.
Zero demand is dened as periods when there is no mixed water outlet usage on the system.
Pre-installation calculations should have already determined the system heat loss characteristics. For optimum
performance the DRV80 requires a minimum of 2°F (1°C) di󰀨erential between the digital display on the unit (the
outlet temperature) and the thermometer which is installed on the system return line.
When there is no system draw-o󰀨, the DRV80 reverts to a zero demand. The recirculation temperature is continuously
monitored and adjusted appropriately by the DRV80. The circulating pump must operate continuously, the DRV80
requires a minimum ow of 10 gpm (37.8 lpm).

Armstrong The Brain DRV80R Specifications

General

Brand	Armstrong
Model	The Brain DRV80R
Category	Control Unit
Language	English