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CONTROL PANEL OPERATING PROCEDURES
Table 3-1 Operating Controls, Indicators and Displays
ITEM
CONTROL, INDICATOR
NO.
OR DISPLAY
1
LED Status Indicators
COMM
MANUAL
REMOTE
DEMAND
OUTLET
2
TEMPERATURE
Display
3
VFD Display
4
RS-232 Port
5
FAULT Indicator
CLEAR Key
6
7
READY Indicator
ON/OFF Switch
8
9
LOW WATER LEVEL
TEST/RESET Switches
3-2
Four Status LEDs indicate the current operating status as
follows:
Lights when RS-232 communication is occurring
Lights when the unit is being controlled using the front panel
keypad.
Lights when the unit is being controlled by an external signal
from an Energy Management System
Lights when there is a demand for heat.
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.
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
Port permits a Laptop Computer or External Modem to be
connected to the boiler Control Panel.
Red FAULT LED indicator lights when a boiler alarm
condition occurs. An alarm message will appear in the VFD.
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if the alarm is no longer valid.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.
Lights when all Pre-Purge conditions have been satisfied.
Enables and disables boiler operation.
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 CLEAR resets the display.
FUNCTION
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