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Name (Abbreviation)
Alarm (ALR)
a
High Fire (HFP)
a
Low Fire (LFP)
Limit/Ctrl OUT (LCO)
A-1
A-2
F1-1
F1-2
F2-1
F2-2
FG-1
FG-2
a
HFP and LFP are not fail-safe outputs. Authorities having jurisdiction may require additional contacts on the air damper to prove
HFP and LFP.
OPERATION
The R7999 ControLinks™ Controller provides communication
capabilities similar to those found in the 7800 SERIES
equipment. Fault annunciation is available through a
connection to the communication data output (DDL). Operating
history is kept in nonvolatile memory as is the current lockout
status.
The ZM7999 ControLinks™ Commissioning Software tool or
S7999B Display is necessary for the field commissioning prior
to operation. Refer to the configuration software help screens
for commissioning procedures.
The R7999 ControLinks™ Controller tracks the firing rate input
value and drives the ML7999 Actuators according to the
commissioned profile and maintains the relative programmed
positions.
WARNING
Explosion Hazard.
Improper configuration can cause fuel buildup and
explosion.
The ZM7999 ControLinks™ Commissioning Software
is to be used only by experienced and/or licensed
burner-boiler operators and mechanics.
Operators of this software may move fuel and/or air
actuators to positions that can create hazardous burner
conditions. Improper user operation can result in prop-
erty loss, physical injury or death.
Table 2. R7999 Output Terminal Description.
Terminal
Number
7
Alarm Output.
8
High Fire Proved normally open contact is activated when the HF input terminal has been
energized and the R7999 has successfully moved the air/fuel damper (and FGR, if so
configured) to the programmed Purge Position.
9
Low Fire Proved normally open contact is activated when the LF input terminal has been
energized and the R7999 has successfully moved the Air, selected fuel, and FGR damper to
the programmed Light-Off Position.
14
Line voltage output that signals limits are satisfied and that a demand exists to run the burner
and R7999 is operational. Provides power to energize Burner Control.
15
A-1: Output when combined with A-2 is used to modulate the Air damper. The resultant push-
pull current flow of the two outputs causes the motor to advance, reverse, or hold.
16
A-2: Output when combined with A-1 is used to modulate the Air damper. The resultant push-
pull current flow of the two outputs causes the motor to advance, reverse, or hold.
20
F1-1: Output when combined with F1-2 is used to modulate the Fuel 1 valve. The resultant
push-pull current flow of the two outputs causes the motor to advance, reverse, or hold.
21
F1-2: Output when combined with F1-1 is used to modulate the Fuel 1 valve. The resultant
push-pull current flow of the two outputs causes the motor to advance, reverse, or hold.
25
F2-1: Output when combined with F2-2 is used to modulate the Fuel 2 valve. The resultant
push-pull current flow of the two outputs causes the motor to advance, reverse, or hold.
26
F2-2: Output when combined with F2-1 is used to modulate the Fuel 2 valve. The resultant
push-pull current flow of the two outputs causes the motor to advance, reverse, or hold.
30
FG-1: Output when combined with FG-2 is used to modulate the FGR damper. The resultant
push-pull current flow of the two outputs causes the motor to advance, reverse, or hold.
31
FG-2: Output when combined with FG-1 is used to modulate the FGR damper. The resultant
push-pull current flow of the two outputs causes the motor to advance, reverse, or hold.
R7999A,B CONTROLINKS™ CONTROLLER
Description
The R7999 must go through an Initiate state whenever the fuel
select switch is changed.
The R7999 has the following operating states:
1. Non-Configured State. The controller is shipped from the
factory in this condition and will not respond to any input
other than the DDL port (configuration tool port).
2. Commissioning State. The controller enters this state
once communications with a configuration tool is
established. Actuators are placed in pseudo-manual
control mode during this state. Commands from the
configuration software increment or decrement motor
positions. The R7999 write the values for the valve
and damper positions, as a function of firing rate, during
this state.
3. Initiate State. This state exists for a minimum of ten
seconds after an internally- or externally-initiated reset.
The R7999 performs internal checks during this state.
4. Standby State. This state occurs whenever the LCI input
(terminal 13) is not active. All actuators move to the
Programmed Standby Stop Position (PSTP) or return to
the light-off position, except for the FGR actuator, which
moves to the closed position.
5. Processing Demand State. The R7999 enters this state
when the LCI has just become active. The R7999 makes
sure the firing rate command inputs are valid before
advancing to the next state.
6. Run State. The R7999 enters this state when the LCI
input is active. The high fire or low fire command from the
burner control causes the air actuator and the FGR
actuator (if configured) to drive to the purge or light-off
positions, respectively. The selected fuel, air and FGR
5
65-0238—10
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