Operation - Honeywell 7800 Series Manual

WARNING
The user of the RM7888A is responsible for pro-
viding an effective purge that meets the approval
of the authority having jurisdiction for a particular
installation. Failure to provide an effective purge
can result in a fire or explosion that can cause dam-
age, serious injury or death.
Sequences of Operation
The RM7888A has five user selectable operating se-
quences: Pilot—PV Return; Pilot—MV Lo Fire; Direct
Spark Ignition (DSI) Normal Operating Sequence; DSI
High/Low Stepfire Operating Sequence and DSI Off/On
Stepfire Operating Sequence. Each operating sequence will
be discussed in detail.
CAUTION
The user selects the appropriate control sequence
by clipping configuration jumpers. Sequence se-
lection must be done correctly. Failure to select
the sequence correctly can be hazardous. Follow
instructions in this specification.
Jumper
J1 J2
Intact Intact
Intact Clipped
Clipped Intact
Clipped Clipped
Intact Intact
Intact Clipped
Clipped Intact
Clipped Clipped
1
Each operating sequence is described individually in the Operation section of this specification. Read the appropriate
operating sequence section carefully before clipping jumpers. The sequence selection cannot be reversed.
TABLE 4—SITE-CONFIGURABLE JUMPER OPTIONS.
J3
Intact Default, selects the Pilot Configuration Burner Sequence,
including the Pilot Relight Function.(PV Return)
Clipped Selects DSI Normal Burner Sequence.
Clipped Selects DSI High/Low Stepfire Burner Sequence.
Intact Selects DSI Off/On Stepfire Burner Sequence.
Clipped Selects Pilot Configuration Burner Sequence, but excludes the
Pilot Relight Function.(MV Lo Fire)
Intact Illegal; will result in a lockout.
Intact Illegal; will result in a lockout.
Clipped Illegal; will result in a lockout.
SELECTABLE SITE-CONFIGURABLE JUMPERS
The RM7888A has five site-configurable jumper options
and three options that will result in a lockout, see Fig. 19 and
Table 4. The site-configurable jumpers should be clipped
with side cutters and the resistor removed from the Relay
Module.
Fig. 19—Selectable site-configurable jumpers.
SELECTABLE CONFIGURATION JUMPERS
RM7888A Action
19
RM7888A

OPERATION

Operation
M7861
1
1
1
1
1
.
65-0175