Benchmark 750 – 1000 Boiler User Manual - INTERNATIONAL
CHAPTER 3 – OPERATION
OMM-0119_0A
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
37
of
170
GF-130-I
Ph.: 800-526-0288
11/03
/2016
Table 3-1: Operating Controls, Indicators and Displays
ITEM
CONTROL,
INDICATOR OR
DISPLAY
FUNCTION
1
LED Status Indicators
Four Status LEDs indicate the current operating status as follows:
COMM
Lights when RS232 communication is occurring – see Item 4
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
RS232
Port
This port is used only by factory-trained personnel to monitor
OnAER communications, in combination with the RS232 Adaptor
Cable (P/N
124675
).
5
FAULT
Indicator
Red
FAULT
LED indicator lights when a Heating 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the alarm is no longer valid.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 Heating 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.
