Perform A Controls Test (Quick Test/Quick Calibration); Charge Refrigerant Into Chiller - Carrier AquaEdge 19XR Start-Up, Operation And Maintenance Instructions Manual

MODIFY EQUIPMENT CONFIGURATION IF NECESSARY
The EQUIPMENT SERVICE table has screens to select, view,
or modify parameters. Carrier's certified drawings have the
configuration values required for the jobsite. Modify these val-
ues only if requested. Modifications can include:
• Chilled water reset
• Entering chilled water control (Enable/Disable)
• 4 to 20 mA demand limit
• Auto restart option (Enable/Disable)
• Remote contact option (Enable/Disable)
See the 19XR with PIC 5 Controls Operation and Trouble-
shooting guide for more details about these functions.
Perform a Controls Test (Quick Test/
Quick Calibration)
Check the safety controls status by performing an automated
controls test. Actuators with feedback like inlet guide vane ac-
tuator need to be calibrated using the Quick Calibration menu
prior to unit startup. Other controls tests can be done using the
Quick Test Menu. The Quick Test or Quick Calibration menu
can be accessed from the MAIN MENU. (The QUICK TEST
screen can only be accessed when the chiller is in STOP
mode.) On the QUICK TEST table screen, select a test to be
performed.
The Quick Test checks all outputs and inputs for function. In
order to successfully proceed with the controls test, the com-
pressor should be off, no alarms showing, and voltage should
be within ±10% of rating plate value. Each test asks the opera-
tor to confirm the operation is occurring and whether or not to
continue. If an error occurs, the operator can try to address the
problem as the test is being done or note the problem and pro-
ceed to the next test.
NOTE: If during the controls test the guide vanes do not open,
verify the low pressure alarm is not active. (An active low
pressure alarm causes the guide vanes to close.)
NOTE: The oil pump test will not energize the oil pump if
cooler pressure is below –5 psig (–35 kPa).
When the controls test is finished, the test stops and the
QUICK TEST menu displays. If a specific automated test pro-
cedure is not completed, access the particular control test to
test the function when ready. For information about calibration,
see the sections Checking Pressure Transducers, page 47, and
High Altitude Locations, page 47.

Charge Refrigerant into Chiller

CAUTION
The transfer, addition, or removal of refrigerant in spring
isolated chillers may place severe stress on and damage ex-
ternal piping if springs have not been blocked in both up
and down directions.
CAUTION
Always operate the condenser and chilled water pumps
during charging operations to prevent freeze-ups.
The standard 19XR chiller is shipped with the refrigerant al-
ready charged in the vessels. However, the 19XR chiller may
be ordered with a nitrogen holding charge of 15 psig (103 kPa).
Evacuate the nitrogen from the entire chiller, and charge the
chiller from refrigerant cylinders.
CHILLER EQUALIZATION WITHOUT A PUMPOUT UNIT
When equalizing refrigerant pressure on the 19XR chiller
after service work or during the initial chiller start-up, do
not use the discharge isolation valve to equalize. A
charging hose (connected between the charging valves on
top of the cooler and condenser) should be used as the
equalization valve. Failure to follow this procedure may
damage equipment.
To equalize the pressure differential on a refrigerant isolated 19XR
chiller, use the terminate lockout function PUMPDOWN/LOCK-
OUT (located in the Maintenance Menu). This helps to turn on
pumps and advises the operator on proper procedures.
The following steps describe how to equalize refrigerant pres-
sure in an isolated 19XR chiller without a pumpout unit.
1. Access terminate lockout function on the Maintenance
Menu. (Alternatively, the Quick Test provides a means for
cooler and condenser pump control.)
IMPORTANT: Turn on the chilled water and condenser
water pumps to prevent freezing.
2. Slowly open the refrigerant charging valves. The chiller
cooler and condenser pressures will gradually equalize.
This process takes approximately 15 minutes.
3. Once the pressures have equalized, the cooler isolation
valve, the condenser isolation valve, and the hot gas isola-
tion valve may now be opened. Refer to Fig. 23 and 24 for
the location of the valves.
Whenever turning the discharge isolation valve, be sure to
reattach the valve locking device. This prevents the valve
from opening or closing during service work or during
chiller operation. Failure to follow this procedure may
damage equipment and result in bodily injury.
CHILLER EQUALIZATION WITH
PUMPOUT UNIT
The following steps describe how to equalize refrigerant pres-
sure on an isolated 19XR chiller using the pumpout unit.
1. Access the terminate lockout function on the PUMP-
DOWN/LOCKOUT screen (located in the Maintenance
Menu).
IMPORTANT: Turn on the chilled water and condenser
water pumps to prevent freezing.
2. Open valve 4 on the pumpout unit and open valves 1a and
1b on the chiller cooler and condenser, Fig. 23 and 24.
Slowly open valve 2 on the pumpout unit to equalize the
pressure. This process takes approximately 15 minutes.
3. Once the pressures have equalized, the discharge isolation
valve, cooler isolation valve, optional hot gas bypass isola-
tion valve, and refrigerant isolation valve can be opened.
Close valves 1a and 1b, and all pumpout unit valves.
24
CAUTION
WARNING
FREE-STANDING