Thermon HELLFIRE 400, Installation, Operation & Maintenance Instructions Manual

Page: 15 / 56

15 15
C
on
tro
ls &
In
di
ca
tio
n
s
LED Name Description State Indication
RES FSR Reset On Controller clears DSI control module alarm.
EMS REQ EMS request
On
EMS module request for heater to run.
Heater only acts on this request if in AUTO mode.
Pulsing
Local EMS mode. Installed EMS module can request heater operation
ON or OFF.
POWER Power supply On Controller energized.
MOTOR Motor On Contactor closed, motor turned on.
HEAT
Controller request
for heat
On
DSI control module requested. Ignition sequence started or burner
operating.
RUN IND
Heater run
indication
On
Indication contact closed. Turns on after 60 seconds of normal
operation.
ALARM
Heater alarm
indication
On
Alarm indication contact closed. Heater off and locked out.
Controller must be reset manually.
FSR ALARM
Flame safety
relay/DSI alarm
On
DSI control module in ALARM, or controller is preventing its
operation.
Alternating DSI control module in ALARM. Heater failed 4 times in 5 minutes.
AIR SW
Air pressure
switch
On Contact closed. Sufficient air flow to allow burner operation.
Alternating
Air switch did not operate as intended. Air switch either did not
close with fan ON or did not open with fan OFF.
On or off with pulse FAN MODE enabled locally.
On or off with 2
pulses
FAN MODE enabled remotely by SCADA CEMS.
CYCLING
Cycling
thermostat
On Thermostat closed. Heated air temperature is BELOW set point.
Alternating Cycling thermostat open for more than 10 minutes.
HIGH LIM
High limit
thermostat
On Thermostat closed. Heated air temperature ABOVE set point.
Alternating
High limit thermostat closed momentarily indicating air
temperature exceeded set point.
MANUAL Manual operation On Selector switch in “MANUAL” position. Heater in MANUAL mode.
RAIL TH Rail thermostat
On
Thermostat open. Rail temperature is BELOW set point (normal
mode COR).
On or off with pulse Rail thermostat configured for OOR (reverse mode).
RTC
Rail traffic control
mode
On
Indicates selector switch is in “REMOTE/AUTO” position and AAR
terminals 1 and 2 are closed.
On or off with pulse
Indicates selector switch is in “REMOTE/AUTO” position and
requested by RCMS.
E.5 Terminal Blocks
The controller interconnects with the control panel by means of 8 board level headers, TB1 to TB8, which accept the various
wire harness plug connectors. The controller and EMS module connect via a ribbon cable that plugs into the 10-pin header
found on each.
Table 1 – Terminal Block Description
Name Description
JP1 Jumper. Used to configure EEPROM settings
TB1 120V power, transformer primary and motor contactor coil
output
TB2 Transformer secondary 24V power and FSR request output
TB3 RTC run and alarm indication contacts outputs
TB4 Rail thermostat, RTC request, Manual, and Enable inputs
TB5 Air switch, FSR/DSI alarm, gas valve inputs
TB6 Cycling and high limit thermostats inputs
TB7 Communication port, RS-485
TB8 FSR reset and current transformer inputs
10-pin header* EMS module power and signal connection
*Located in the upper right corner next to TB8.