AERCO BMK 1000 - Manual (Page 39)

Benchmark 750/1000 Boiler Installation, Operation & Maintenance Manual
CHAPTER 3 – OPERATION
OMM-0082_0J AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 39 of 192
GF-130
Ph.: 800-526-0288 05/21/2014
Table 3-1: Operating Controls, Indicators and Displays
ITEM FEATURE FUNCTION
1
LED Status Indicators
Four (4) Status LEDs indicate the current operating status as follows:
COMM Lights when RS-232 communication is occurring
MANUAL
Lights when the valve position (fire rate) is being controlled
using the front panel keypad. This mode of operation is for
service technician use only.
REMOTE
Lights when the unit is being controlled by an external signal
from an Energy Management System
DEMAND Lights when there is a demand for heat.
2
OUTLET
TEMPERATURE
Display
3–Digit, 7–Segment LED display continuously displays the
outlet water temperature. The °F or °C LED next to the display
lights to indicate whether the displayed temperature is in
degrees Fahrenheit or degrees Celsius. The °F or °C blinks
when operating in the Deadband Mode.
On a BST Master, display flashes & shows header temperature.
3 VFD Display
Vacuum Fluorescent Display (VFD) consists of 2 lines each
capable of displaying up to 16 alphanumeric characters. The
information displayed includes:
• Startup Messages
• Fault Messages
• Operating Status Messages
• Menu Selection
• BST Messages
4 RS-232 Port
Port permits a Laptop Computer or External Modem to be
connected to the unit’s Control Panel. AERCO offers for
purchase the RS232 Adaptor Cable (P/N 124675), which is
designed to work with this port. This cable features a DB9
connector for connection to older computers with serial ports or
can be used with a Serial-to-USB adaptor for use in modern
computer USB ports.
5 FAULT Indicator
Red FAULT LED indicator lights when a boiler alarm condition
occurs. An alarm message will appear in the VFD.
6 CLEAR Key
Turns off the FAULT indicator and clears the alarm message if
the alarm is no longer valid. Lockout type alarms will be latched
and cannot be cleared by simply pressing this key.
Troubleshooting may be required to clear these types of alarms.
7 READY Indicator
Lights ON/OFF switch is set to ON and all Pre-Purge conditions
have been satisfied.
8 ON/OFF Switch Enables and disables boiler operation.
9
LOW WATER LEVEL
TEST/RESET
Switches
Allows operator to test operation of the water level monitor.
Pressing TEST opens the water level probe circuit and
simulates a Low Water Level alarm.
Pressing RESET resets the water level monitor circuit.
Pressing the CLEAR key (item 6) resets the display.