Benchmark Platinum-Edge: Operation-Service Manual
SECTION 6 – MODES OF OPERATION
OMM-0137_D • GF-211
•
7/16/2019
Technical Support
•
(800) 526-0288
•
Mon-Fri, 8 am - 5 pm EST Page 76 of 146
To set the unit to
Remote Setpoint
mode:
Remote Setpoint Mode Setup Instructions
1. As a prerequisite, verify that the unit is
not
a BST Client or Manager. Go to:
Main Menu
Advanced Setup
BST Cascade
Cascade Configuration, Unit Mode
=
Off
.
2. On the Controller, go to
Main Menu
Advanced Setup
Unit
Application
Configuration
.
3. Press
SH Operating Mode
and choose
Remote Setpt
.
4. Set the
Remote Setpoint
parameter to one of the following:
•
4-20mA/1-5V
•
BST (PWM) Input
•
BAS
•
0-20mA/0-5V
•
Network
If the
Network
setting is selected for RS-485 Modbus operation, a valid Comm Address must
be entered in the
Setup
menu. Refer to the
Modbus Communication Manual
(OMM-0035, GF-
114) for additional information.
While it is possible to change the values of temperature related functions, the unit is factory
preset with values that work well in most applications. It is suggested that an AERCO
representative be contacted, prior to changing any temperature related function values.
6.4 DIRECT DRIVE MODES
The unit’s air/fuel valve position (% open) can be changed by a remote signal which is typically
sent from an Energy Management System (EMS) or from a Building Automation System (BAS).
The
Direct Drive
mode can be driven by a current or voltage signal.
The default setting for the
Direct Drive
mode is
4-20 mA/1-5 VDC
. With this setting, a 4 to 20
mA signal, sent by an EMS or BAS is used to change the unit’s valve position from 0% to 100%.
A
4 mA/1V
signal is equal to a
0%
valve position, while a
20 mA /5V
signal is equal to a
100%
valve position. When a
0-20 mA/0-5 VDC
signal is used,
zero
is equal to a
0%
valve position.
In addition to the current and voltage signals described above, the
Direct Drive
mode can also
driven by a RS-485 Modbus Network signal from an EMS or BAS. When in
Direct Drive
mode,
the unit is a slave to the EMS or BAS and does not have a role in temperature control.
Direct
Drive
can be used to drive single, or multiple units.
NOTE:
If a voltage, rather than current signal is used to control the remote setpoint, a DIP switch
adjustment must be made on the CPU Board located in the Edge Controller. Contact your
local AERCO representative for details.
To enable the
Direct Drive
mode:
Direct Drive Mode Setup Instructions
1. As a prerequisite, verify that the unit is
not
a BST Client or Manager. Go to:
Main Menu
Advanced Setup
BST Cascade
Cascade Configuration, Unit Mode
=
Off
.
2. On the Controller, go to:
Main Menu
Advanced Setup
Unit
Application
Configuration
.
