3
®
OPERATION
The E300 Expansion Module is designed to expand the capability of the FLAME-MONITOR
System by allowing the operator to individually track the operation of three additional recycling
interlocks and thirteen running interlocks. The recycling interlocks are wired between the L1-13
terminals on the FLAME-MONITOR wiring base and the non-recycling interlocks are in the 3-P
circuit.
Referring to the wiring diagram found on page 5, the auxiliary limits 1, 2 and 3 will act as an operat-
ing control to recycle the burner. Whenever one is open and the other limits and operating control are
closed, the message on the display of the FLAME-MONITOR control will say:
STANDBY
AUX LIMIT #1 (or #2, or #3) OPEN (or the appropriate modified message)
Similarly, the interlocks in the 3-P circuit will change the standard running interlock message on the
display from: LOCKOUT 3-P RUN INTERLOCK OPEN to be one which will individually identify
the thirteen interlocks now being monitored by the E300, such as, LOCKOUT 3-P LOW OIL TEM-
PERATURE (or the appropriate modified message). The interlock switch chosen will be selected on
a “first out” basis. The first switch which opens in the string to cause the condition will be displayed.
The 3-P circuit is monitored after ten seconds on a burner start-up.
When a “lockout” condition is manually reset, the display on the FLAME-MONITOR and the
Expansion Module is ready to begin a new burner sequence. Note the section Lockouts in the Bulle-
tin E-1101.
Whenever more than one interlock switch in the L1-13 circuit is open on a start-up, the open inter-
lock switch wired in the sequence closest to the L1 terminal will be displayed.Whenever more than
one interlock switch in the 3-P circuit is open on a startup, the open interlock switch closest to termi-
nal 3 will be displayed.
CAUTION: The E300 messages are stored in the EP Programmer of the FLAME-MONI-
TOR control. The E300 messages shown on page 4, and on the wiring diagram on page 5 rep-
resent the default messages that are shipped with each programmer module. Unless these
default messages are modified via the ED510 display module (Refer to Bulletin ED-5101) or
customized via an IBM PC (Refer to CUSTOMIZING E300 MESSAGES in this bulletin), the
E300 must be wired EXACTLY AS SHOWN, in the sequence as shown in the wiring diagram
on page 5 to ensure proper operation.
The E300 must be connected to the FLAME-MONITOR control to provide access to the additional
lockout messages associated with the E300 Expansion Module.
In operation, the 3 to P and L1 to 13 circuits are checked each half cycle (8 milliseconds) by separate
photo optical couplers in the FLAME-MONITOR system to determine if any interlock is open.
Upon detecting an open interlock, the microprocessor in the FLAME-MONITOR control initiates a
LOCKOUT or HOLD message, then scans its inputs corresponding to terminals 23 through 35 and
20 through 22 (on E300) to determine which of the interlocks closest to terminal 3 (3-P circuit) or
closest to terminal L1 (L1-13 circuit) is open. The microprocessor then selects the corresponding
message from the stored message list and displays it. The E300 messages then become a part of the
historical data which is stored in the FLAME-MONITOR system memory.
Any interlock in the 3-P or in the L1-13 circuit that opens for at least 33-50 ms while the burner is
ON, or for at least 170 ms while the unit is in PURGE will cause the E300 and the FLAME-MONI-
TOR control to respond with the proper message. Interlock contacts that temporarily open for shorter
time periods will be ignored. Refer to the REQUIRED WIRING DIAGRAM on Page 5.
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