AERCO BMK 1.5 LN Dual Fuel Feb 2013 - Manual (Page 65)

CHAPTER 5: MODE OF OPERATION
PR2: 05/09/12 Page 65 of 162
Benchmark 1.5LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0041_0C
GF-121
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
TAG-0050 (ACS).
Combination Control System Field Wiring 5.7.1
Wiring for this system is between the BMS Model 168 panel, the CCP and the B.M.S.
(PWM) IN terminals in the I/O Box. For ACS applications, the wiring is between the ACS
panel, the ACS Replay Panel (optional, depending on application), and the RS485 Comm
terminals in the I/O box. Wire the units using a shielded twisted pair of 18 to 22 AWG wire.
When wiring multiple units, each unit’s wiring must conform to the above. For a complete
CCP system-wiring diagram see the AERCO CCP-1 literature (BMS 168 applications) and
TAG-0050 (ACS).
Combination Control System Setup and Startup 5.7.2
Setup for the Combination Mode requires entries to be made in the Configuration Menu for
boiler mode, remote signal type and setpoint. The setpoint is adjustable from 40°F to
240°F.
Enter the following settings in the Configuration Menu:
MENU
OPTION
SETTINGS
BMS 168
Applications
ACS Applications
Boiler Mode Combination Combination
Remote
Signal
BMS (PWM Input) Network (RS485)
Internal Setpt 40°F to 240°F 40°F to 240°F
Refer to paragraph 3.3 for instructions on changing menu options.
While it is possible to change other temperature-related functions for combination mode,
thes functions are preset to their factory default values. These default settings work well in
most applications. It is suggested that AERCO be contacted prior to changing settings other
than the unit’s setpoint. For a complete listing of temperature related function defaults, see
Appendix E.
To set the unit to the manual mode, press the
AUTO/MAN switch. The MANUAL LED will
light.
To set the unit back to the auto mode, press the
AUTO/MAN switch. The MANUAL LED
will go off and the REMOTE LED will light.
When the boiler is switched to BMS mode, the AERCO BMS controls the valve position.
There are no setup requirements to the boiler(s) in this mode.