Overview of Primary Product

12
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Extended Features
High to Low Fire Purge Modulation Capability with High to Low Fire Position Switch Inter-
locks
The modulation feature incorporates a high fire purge time and a low fire start check into the purge
sequence. This feature allows the Multi-Burner Control to sequence internal dry contacts which can
be used by the customer requiring a high fire purge of the combustion chamber before ignition.
The high fire purge time is selectable by means of S2 DIP switches on the logic board (see “S2 DIP
Switch Settings” on page 7):
The modulation terminals on J3 terminal strip will sequence as follows:
Sequence Step Internal Contact Connections - see page 19
High Fire Purge......................... J3,T1 (COMMON) to J3, T3 (HI FIRE)
Low Fire Start............................J3,T1 (COMMON) to J3,T4 (LOW FIRE)
Automatic...................................J3,T1 (COMMON) to J3,T2 (AUTO)
Power Off...................................J3,T1 (COMMON) to J3,T2 (AUTO)
Power On/Limits Off................J3,T1 (COMMON) to J3,T4 (LOW FIRE)
Alarm............................................J3,T1 (COMMON) to J3,T4 (LOW FIRE)
The Automatic step occurs when the burners are operating and allows the burner firing rate to be
controlled by an automatic temperature controller.
Auxiliary Inputs with History Log
This feature provides four auxiliary inputs which are monitored by the Multi-Burner Control as
alarm interlocks. This means that when the input voltage is interrupted, the system locks out and will
annunciate on the optional remote display unit.
Once activated, a voltage of 120 VAC must be present at the input for the Multi-Burner Control Sys-
tem to operate. If an auxiliary input loses its voltage for more than one second while the interlocks
and limits input is powered, then a lockout condition will occur. If the Multi- Flame is equipped with
an optional remote display unit, then the following message will occur:
Unused auxiliary inputs should be connected to 120 VAC.
Valve Leak Sensing Device (VLSD) Interface
The Multi-Burner Control Valve Leak Sensing Device (VLSD) interface is designed for use with a
FIREYE MECHANICAL FMTC410, FMTC310, or FMTC210 Valve Leak Detection device (and is
suitable for use with other, third party Valve Leak Sensing devices) by providing a 120 VAC output
which triggers the start of the test period. An input is also provided which receives a 120 VAC signal
from the VLSD.
If the signal is received within the test period (40 seconds), then the test has been successfully com-
pleted. This option includes the required sequential software to initiate the valve leak test on startup
and shutdown of the burners.
When the limits close to the Multi-Burner Control, the 120 VAC output to the VLSD is activated. If
an optional remote display is connected, the following message will appear:
VALVE LEAKAGE
UNDER TEST XX (where X is the remaining seconds of the test)
AUX. INPUT #1 AUX. INPUT #2 AUX. INPUT #3 AUX. INPUT #4
AUX.LIM#1 FAIL
HH:MM:SS LOCKOUT
AUX.LIM#2 FAIL
HH:MM:SS LOCKOUT
AUX.LIM#3 FAIL
HH:MM:SS LOCKOUT
AUX.LIM#4 FAIL
HH:MM:SS LOCKOUT