75
automatically after power-up. Current and Ramp Time config-
urations are entered in the CFN menu. CT Ratio configuration
is entered in the FUN menu. See Table 13 for menu structure
and Table 14 for settings.
1. Press the softkey until the desired menu is select-
ed on the display.
2. Press the softkey to access the displayed menu
items (Table 14).
3. Use the or arrow keys to scroll between menu items
until the desired item is reached on the display.
4. Press the softkey to access the value to be
changed.
5. Use the or arrow keys to adjust the new displayed
value. The key increases the value while the key
decreases the value. Holding the arrow key will progres-
sively increase the rate of change. The value will stop
changing when either the factory set minimum or maxi-
mum value is reached. To make fine adjustments press
and release the arrow key.
6. When the correct value has been selected, press
the key to store the new configuration. At this
point, there are two options. The key will return
the display to the main display. The or arrow keys
will move the display to the next menu item. When fin-
ished press the key to return to the main display.
To view other settings and troubleshooting guide consult the
Benshaw RediStart MICRO instructional manual included in
the starter.
VFD Field Setup and Verification
Table 12 — Job Site Parameters
*With variable flow systems this point may be configured to the lower end of
the range.
NOTE: Other parameters: Screens are normally left at the default settings;
they may be changed by the operator as required. The time and persistence
settings on the ISM_CONF table can be adjusted to increase or decrease the
sensitivity to a fault condition. Increasing time or persistence decreases sensi-
tivity. Decreasing time or persistence increases sensitivity to the fault
condition.
IMPORTANT: The VFD controller has been factory config-
ured for use and communications to the International Chiller
Visual Controller (ICVC). Some parameters are specific to
the chiller configuration and will need to be verified prior to
operation. Speed control and starting the drive have been
disabled at the VFD keypad. All command functions must
be initiated from the ICVC.
Fig. 35 — Benshaw RediStart
MICRO Default Display
a19-1958
PARAMETER TABLE
Starter Type
ISM_CONF — Select 0 for full voltage, 1 for
reduced voltage, or 2 for solid state or 3 for vari-
able frequency drive.
Motor Rated Line
Voltage
ISM_CONF — Motor rated voltage from chiller
information nameplate.
Volt Transformer
Ratio
ISM_CONF — Enter ratio (reduced to a ratio to
1) of power transformer wired to terminal J3 of
ISM. If no transformer is used enter 1.
Motor Rated
Load Amps
ISM_CONF — Per chiller nameplate data. RL
AMPS on compressor nameplate.
Motor Locked
Rotor Trip
ISM_CONF — Per chiller identification name-
plate.
Starter LRA
Rating
ISM_CONF — Enter value from nameplate in
starter cabinet MAXIMUM FUSE. This value
shall always be “9999” for Benshaw RediStart
MX3 wye-delta and solid-state starters.
Motor Current
CT Ratio
ISM_CONF — Enter ratio (reduced to a ratio to
1) of current transformers wired to terminal J4 of
ISM. This value shall always be “100” for Ben-
shaw RediStart MX3 wye-delta and solid-state
starters.
Current% Imbalance
ISM_CONF — Current imbalance trip threshold.
Enter up to 100% for starter type 3 (VFD).
Ground Fault
Current
Transformers
ISM_CONF — Enter 0 if no ground fault CTs are
wired to terminal J5 of ISM. Enter 1 if ground
fault CTs are used.
Ground Fault
CT Ratio
ISM_CONF — Enter ratio (reduced to a ratio to
1) of ground fault CT.
Single Cycle
Dropout
ISM_CONF — ENABLE if motor protection
required from drop in line voltage within one
cycle.
Line Frequency
ISM_CONF — Enter YES for 60 Hz or NO for
50 Hz.
Line Frequency
Faulting
ISM_CONF — ENABLE if motor
protection required for drop in line
frequency.
Surge Limit/Hot Gas
Bypass Option
OPTIONS — Enter 1 or 2 if HGBP is installed.
Enter 0 otherwise.
PARAMETER TABLE
Minimum Load
Points (Tsmin, IGVmin)
OPTIONS — Per Chiller Requisition (Tsmin,
IGVmin) if available or per job data — See mod-
ify load points section. Refer to table located in
the control panel.
Full (Maximum) Load
Points (Tsmax, IGVmax)
OPTIONS — Per Chiller Requisition (Tsmax,
IGVmax) if available or per job data — See mod-
ify load points section. Refer to table located in
the control panel.
Surge Line Shape Factor
(shapefac)
OPTIONS — Per Chiller Requisition (shapefac).
Refer to table located in the control panel.
Chilled Medium SETUP1 — Enter water or brine.
Evaporator
Refrigerant
Trippoint
SETUP1 — Usually 3° F (1.7° C) below design
refrigerant temperature.
Evaporator Flow
Delta P Cutout
SETUP1 — Per Chiller Requisition if available or
enter 50% of design pressure drop to 0.5 psi
(3.4 kPa).*
Condenser Flow
Delta P Cutout
SETUP1 — Per Chiller Requisition if available or
enter 50% of design pressure drop to 0.5 psi
(3.4 kPa).*
High Condenser Water
Delta P
SETUP1 — Enter the maximum allowable value
for condenser water pressure drop.
VFD Option
SETUP2 — ENABLE if a VFD is supplied for the
chiller.
VFD Current List
SETUP2 — Enter the value fo the full load output
amps of the VFD.
Diffuser Option
(Compressors with Split
Ring Diffusers)
VDO_SRD — ENABLE for 4 and 5 size com-
pressor with split ring diffusers. See model num-
ber nomenclature.
Diffuser Full Span mA
(Compressors with Split
Ring Diffusers)
SETUP2 VDO_SRD — Enter diffuser actuator
full span mA rating for 4 and 5 size compressor.
Value is located on label on side of diffuser actu-
ator motor.
Motor Rated
Kilowatts
RAMP_DEM — Enter value from chiller requisi-
tion form (product data submittal) if DEMAND
LIMIT SOURCE is set to kW.
To Next Page
Loading...
