Specifications

55
MECHANICAL STARTER
1. Check all field wiring connections for tightness, clear-
ance from moving parts, and correct connection.
2. Check the contactor(s) to ensure they move freely. Check
the mechanical interlock between contactors to ensure
that 1S and 2M contactors cannot be closed at the same
time. Check all other electro-mechanical devices, such as
relays, for free movement. If the devices do not move
freely, contact the starter manufacturer for replacement
components.
3. Reapply starter control power (not main chiller power) to
check the electrical functions.
Ensure the starter (with relay 1CR closed) goes through a
complete and proper start cycle.
BENSHAW, INC. RediStart MICRO™ SOLID-STATE
STARTER
1. Ensure all wiring connections are properly terminated to
the starter.
2. Verify the ground wire to the starter is installed properly
and is sufficient size.
3. Verify the motors are properly grounded to the starter.
4. Verify the proper ac input voltage is brought into the start-
er according to the certified drawings.
5. Apply power to the starter.
Oil Charge —
The oil charge for the 19XR compressor de-
pends on the compressor Frame size:
• Frame 2 compressor — 5 gal (18.9 L)
• Frame 3 compressor — 8 gal (30 L)
• Frame 4 compressor — 10 gal (37.8 L)
• Frame 5 compressor — 18 gal (67.8 L)
The chiller is shipped with oil in the compressor. When the
sump is full, the oil level should be no higher than the middle
of the upper sight glass, and minimum level is the bottom
of the lower sight glass (Fig. 2). If oil is added, it must meet
Carrier’s specification for centrifugal compressor use as de-
scribed in the Oil Specification section. Charge the oil through
the oil charging valve located near the bottom of the transmis-
sion housing (Fig. 2). The oil must be pumped from the oil
container through the charging valve due to higher refrigerant
pressure. The pumping device must be able to lift from 0 to
200 psig (0 to 1380 kPa) or above unit pressure. Oil should
only be charged or removed when the chiller is shut down.
Power Up the Controls and Check the Oil
Heater —
Ensure that an oil level is visible in the compres-
sor before energizing the controls. A circuit breaker in the start-
er energizes the oil heater and the control circuit. When first
powered, the CVC should display the default screen within a
short period of time.
The oil heater is energized by powering the control circuit.
This should be done several hours before start-up to minimize
oil-refrigerant migration. The oil heater is controlled by the
PIC II and is powered through a contactor in the power panel.
Starters contain a separate circuit breaker to power the heater
and the control circuit. This arrangement allows the heater to
energize when the main motor circuit breaker is off for service
work or extended shutdowns. The oil heater relay status (OIL
HEATER RELAY) can be viewed on the COMPRESS table on
the CVC. Oil sump temperature can be viewed on the CVC
default screen.
SOFTWARE VERSION — The software part number is la-
beled on the backside of the CVC module. The software ver-
sion also appears on the CVC configuration screen as the last
two digits of the software part number.
Software Configuration
As the 19XR unit is configured, all configuration settings
should be written down. A log, such as the one shown on pages
CL-1 to CL-14, provides a convenient list for configuration
values.
Input the Design Set Points —
Access the CVC set
point screen and view/modify the base demand limit set point,
and either the LCW set point or the ECW set point. The PIC II
can control a set point to either the leaving or entering chilled
water. This control method is set in the EQUIPMENT SER-
VICE (TEMP_CTL) table.
Input the Local Occupied Schedule (OCCPC01S) —
Access the schedule OCCPC01S screen on the CVC and set up
the occupied time schedule according to the customer’s re-
quirements. If no schedule is available, the default is factory set
for 24 hours occupied, 7 days per week including holidays.
For more information about how to set up a time schedule,
see the Controls section, page 10.
The CCN Occupied Schedule (OCCPC03S) should be con-
figured if a CCN system is being installed or if a secondary
time schedule is needed.
NOTE: The default CCN Occupied Schedule OCCPC03S is
configured to be unoccupied.
Input Service Configurations —
The following con-
figurations require the CVC screen to be in the SERVICE por-
tion of the menu.
• password
• input time and date
• CVC configuration
• service parameters
• equipment configuration
• automated control test
PASSWORD — When accessing the SERVICE tables, a pass-
word must be entered. All CVC are initially set for a password
of 1-1-1-1.
INPUT TIME AND DATE — Access the TIME AND DATE
table on the SERVICE menu. Input the present time of day,
date, and day of the week. The HOLIDAY TODAY parameter
should only be configured to YES if the present day is a
holiday.
NOTE: Because a schedule is integral to the chiller control
sequence, the chiller will not start until the time and date have
been set.
This equipment is at line voltage when AC power is con-
nected. Pressing the STOP button does not remove voltage.
Do not operate the chiller before the control configurations
have been checked and a Control Test has been
satisfactorily completed. Protection by safety controls can-
not be assumed until all control configurations have been
confirmed.