Carrier 19XR,XRV Hermetic Centrifugal Liquid Chillers User Manual

Page 21

7. Press

to register the values and to move hori-

zontally (left to right) within a period.

8. Press

to leave the period or override.

9. Either return to Step 4 to select another period or over-

ride, or press

again to leave the current time

schedule screen and save the changes.

10. The Holiday Designation (HOLIDEF table) may be

found in the Service Operation section, page 45. The
month, day, and duration for the holiday must be
assigned. The Broadcast function in the BRODEF
table also must be enabled for holiday periods to
function.

TO VIEW AND CHANGE SET POINTS (Fig. 20)

1. To view the SETPOINT table, from the MENU screen

press .

2. There are 5 set points on this screen: BASE DEMAND

LIMIT, LCW SETPOINT (leaving chilled water set
point), ECW SETPOINT (entering chilled water set
point), ICE BUILD SETPOINT, and TOWER FAN
HIGH SETPOINT. Only one of the chilled water set
points can be active at one time. The set point that is
active is determined from the SERVICE menu. See the
Service Operation section, page 45. The ice build (ICE
BUILD) function is also activated and configured from
the SERVICE menu.

3. Press

to highlight the desired

set point entry.

4. Press

to modify the highlighted set point.

5. Press

to change the select-

ed set point value.

6. Press

to save the changes and return to the pre-

vious screen.

SERVICE OPERATION — To view the menu-driven pro-
grams available for Service Operation, see Service Operation
section, page 45. For examples of CVC/ICVC display screens,
see Table 2.

ENTER

EXIT

SETPOINT

SELECT

INCREASE

DECREASE

ENTER

19XR_II

SETPOINT SELECT

SETPOINT

Base Demand Limit

Control Point
LCW Setpoint
ECW Setpoint
ICE BUILD Setpoint
Tower Fan High Setpoint

100%

50.0 F
60.0 F
40.0 F
85.0 F

Fig. 20 — Example of Set Point Screen