Honeywell 7800 SERIES Product Data page 10

7800 SERIES S7830 EXPANDED ANNUNCIATOR
NOTE: Not all 7800 SERIES devices lock out for an open
interlock. Annunciation is available as hold
messages but an alarm will not be generated.
First-Out Annunciation
The S7830 does not cause burner lockouts. Only the 7800
SERIES Relay Modules with the lockout feature (RM78X0L,
RM7838B, C or RM7895, 6, 7, 8 with configuration resistor
feature, JR2 clipped) can cause a burner lockout (safety
shutdown) for abnormal interlock conditions. From the time a
lockout occurs, the expanded first-out annunciation is
communicated as follows:
1. The 7800 SERIES Relay Module causes a lockout due
to, for example, the opening of the Lockout Interlock
circuit.
2. The 7800 SERIES Relay Module communicates the
lockout status, including the time when the fault
occurred, to any modules connected to the RS-485
ControlBus communication network.
3. The S7830 recognizes the lockout status of the 7800
SERIES Relay Module and the time when the fault
occurred.
4. The S7830 begins to review the status of all switched
inputs on a grouping of several line cycles time duration.
When identifying a normal status of all switched inputs,
the S7830 will advance one line cycle grouping to
identify the first switched input that opened after the
normal status. This switch point, for example, air flow
switch, is identified as the first-out annunciation point.
5. This first-out information is communicated by the S7830
to:
a. The 7800 SERIES Relay Module to enhance the
lockout display message, for example from Lockout
Interlock fault to Airflow Switch fault.
b. The array of 26 status LED on the face of the S7830
that are latched to the lockout mode to visually
indicate which switch is the first-out point. For the
example being used:
(1) All LED electrically upstream from the airflow
switch will be illuminated constantly.
(2) The airflow switch LED will flash on and off to
indicate that this switch was the first-out cause of
the lockout condition.
(3) Any LED electrically downstream from the
first-out point will remain dark because the circuit
upstream of that point has been broken.
(4) The first-out LED will be latched to indicate the
mode of the 26-led array.
6. When the lockout is cleared by resetting the 7800
SERIES Relay Module, the S7830 is automatically
changed from first-out to current.
Current Status
The S7830 provides current status information, through the
RS-485 ControlBus, defining which switch point is causing a
hold condition. The 7800 SERIES Relay Module places the
burner in Standby when the control input, terminal 6, opens
(terminal 17 on VP devices: RM7898, RM7840G/L and
RM7800L). The exact switch causing the burner to enter
Standby may be one of several controls, limits or interlocks.
The S7830, through the RS-485 ControlBus, communicates
the current status of the 21 monitored digital contacts points
65-0101—03
twice each second. For example, if the Standby hold is being
caused by the Burner Switch being open, the Standby hold
message will be enhanced to identify the Burner Switch,
providing information that identifies the reason for the hold.
S7830 User Interface
LED States
The array of 26 LED can have the following states:
1. Digital Points:
a. The digital contact switch points can have one of
three states:
(1) LED ON indicates power is present at the S7830
terminal monitoring that switch.
(2) LED OFF indicates power is absent at the S7830
terminal monitoring that switch.
(3) LED FLASHING indicates the switch that is the
cause of the lockout, first-out point.
b. Digital Points LED:
(1) Main Valve Proof of Closure
(2) Burner Switch
(3) Operating Control
(4) Auxiliary Limit # 1
(5) Auxiliary Limit # 2
(6) Low Water Cutoff
(7) High Limit
(8) Auxiliary Limit # 3
(9) Oil Select Switch
(10)High Oil Pressure
(11)Low Oil Pressure
(12)High Oil Temperature
(13)Low Oil Temperature
(14)Gas Select Switch
(15)High Gas Pressure
(16)Low Gas Pressure or Atomizing Switch
(17)Air Flow Switch
(18)Auxiliary Interlock # 4
(19)Auxiliary Interlock # 5
(20)Other Preignition Interlock
(21)Other Lockout Interlock
2. Power LED
a. The Power LED can have one of three states:
(1) LED ON indicates an abnormal condition that
shows power is present at the S7830, but the
device is inoperative (reset the S7830).
(2) LED OFF indicates:
(a)Power is absent at the S7830.
(b)Power is present at the S7830, but the Power
LED is defective.
(c)Power is present at the S7830, the Power
LED is not burned out, but the device is
inoperative. (Reset the S7830.)
(3) LED FLASHING (OFF briefly every four
seconds) indicates power is present at the
S7830 and the device is operating properly.
3. System Lockout LED
a. The System Lockout LED can have one of two
states:
(1) LED ON indicates the 7800 SERIES Relay Mod-
ule is in a lockout state.
(2) LED OFF indicates the 7800 SERIES Relay
Module is in a normal operating status, power is
off, or the LED is defective.
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