31
Cooler Pump Control (
Configuration
OPTN
PUMP
) —
The 30RB units can be configured for cooler
pump control. Cooler Pumps Sequence is the variable that
must be confirmed in the field. Proper configuration of the
cooler pump control is required to provide reliable chiller oper-
ation. The factory default setting for Cooler Pumps Sequence is
PUMP
=
0
(No Pump), for units without the factory-installed
hydronic package. For units with the hydronic package, the
factory default setting for Cooler Pumps Sequence is
PUMP
=
1
(1 pump only) for single pump units, or
PUMP
=
2
(2 pumps
auto) for dual pump units. For dual pump hydronic option
units, three control options exist. If the Cooler Pumps Se-
quence (
PUMP
) is set to 2, the control will start the pumps and
automatically alternate the operation of the pumps to even the
wear of the pumps. If a flow failure is detected, the other pump
will attempt to start. Two manual control options also exist.
When the Cooler Pumps Sequence is set to
PUMP
=3
Cooler
Pump 1 will always operate. When the Cooler Pumps Se-
quence is set to
PUMP
=4
Cooler Pump 2 will always operate.
It is recommended for all chillers that the cooler pump con-
trol be utilized unless the chilled water pump runs continuously
or the chilled water system contains a suitable concentration of
antifreeze solution. When the Cooler Pumps Sequence is config-
ured, the cooler pump output will be energized when the chiller
enters an “ON” mode. The cooler pump output is also energized
when certain alarms are generated. The cooler pump output
should be used as an override to the external pump control if
cooler pump control is not utilized. The cooler pump output is
energized if a P.01 Water Exchanger Freeze Protection alarm is
generated, which provides additional freeze protection if the sys-
tem is not protected with a suitable antifreeze solution.
For all Cooler Pumps Sequence (
PUMP
) settings (including
0), closure of both the chilled water flow switch (CWFS) and
the chilled water pump interlock contact (connected across
TB-5 terminals 1 and 2) are required. In addition, for Cooler
Pumps Sequence settings of
PUMP
= 1, 2, 3, 4,
normally open
auxiliary contacts for Pump 1 and Pump 2 (wired in parallel)
must be connected to the violet and pink wires located in the
harness from the MBB-J5C-CH18 connector. The wires in the
harness are marked “PMP1-13” and “PMP1-14.” See the field
wiring diagram in the 30RB Installation Instructions.
Regardless of the cooler pump control option selected, if
the chilled water flow switch/interlock does not close within
the
MINUTES OFF TIME
(
Configuration
OPTN
DELY
) period after the unit is enabled and in an
ON
mode,
alarm P.14 will be generated. Other conditions which will trig-
ger this alarm include:
• Cooler pump interlock is open for at least 30 seconds
during chiller operation.
• Lag chiller in Master/Slave Control pump interlock does
not close after 1 minute of the pump start command.
RUN
PRG
MON
%
Hz
MODE
Loc
Rem
ENT
RUN
STOP
1
3
1
2
3
6
7
4
5
9
10
11
14
12
8
Fig. 17 — Schnieder Altivar 21 VFD Display Panel
CALL
OUT
LED/KEY
DESCRIPTION
1
Display
RUN LED
Illuminates when a run command is applied to the drive
controller. Flashes when a speed reference is present
with the run command.
2
Display
PRG LED
Illuminates when Programming mode is active. Flashes
when -GrU menus are active.
3
Display
MON LED
Illuminates when Monitoring mode is active. Flashes in
fault record display mode.
4
Display
Unit
4 digits, 7 segments
5
Display
Unit LED
The % LED illuminates when a displayed numeric
value is a percentage. The Hz LED illuminates when a
displayed numeric value is in hertz.
6
Up/Down
arrows
Depending on the mode, use the arrows to: navigate
between the menus, change a value, or change the
speed reference when Up/Down LED (7) is lit.
7
Up/Down
LED
Illuminates when the Up/Down arrows are controlling
the speed reference.
8
Loc/Rem
LED
Illuminates when Local mode is selected.
CALL
OUT
LED/KEY
DESCRIPTION
9
MODE
Press to select the Keypad mode. Modes are: Run
mode (default on power-up), Programming mode, and
Monitoring mode. Can also be used to go back to the
previous menu.
10
Loc/Rem
Switches between Local and Remote modes.
11
ENT
Press to display a parameter’s value or to save a
changed value.
12
RUN LED
Illuminates when the Run key is enabled.
13
RUN
Pressing this key when the RUN LED is illuminated
starts the drive controller.
14
STOP
Stop/reset key. In Local mode, pressing the STOP key
causes the drive controller to stop based on the setting
of parameter F721. In Remote mode, pressing the
STOP key causes the drive controller to stop based on
the setting of parameter F603. The display will indicate
a flashing “E”. If F735 is set to 0 (default setting), press-
ing the stop key twice will reset all resettable faults if
the fault condition has been resolved.
Summary of Contents for AQUASNAP 30RBA315
Page 77: ...77 Fig 37 Control Schematic 30RB060 080 a30 4619...
Page 78: ...78 Fig 38 Control Schematic 30RB090 150 a30 4620...
Page 79: ...79 Fig 39 Control Schematic 30RB160 190 a30 4622...
Page 80: ...80 Fig 40 Control Schematic 30RB210 300 a30 4622...
Page 81: ...81 Fig 41 Heat Reclaim Control Schematic a30 4622...