Specifications

61
OCCDEFCS — The OCCDEFCS screen contains the Local
and CCN time schedules, which can be modified here or on the
SCHEDULE screen as described previously.
HOLIDAYS — From the HOLIDAYS screen, the days of the
year that holidays are in effect can be configured. See the
holiday paragraphs in the Controls section for more details.
BRODEF — The BRODEF screen defines the start and end of
daylight savings time. By default this feature is enabled. Enter
the dates for the start and end of daylight savings if required
for your location. Note that for DAY OF WEEK, 1 represents
Monday. START WEEK and STOP WEEK refer to the instance
of the selected DAY OF WEEK during the selected START
MONTH and year. To disable the feature, change START
ADVANCE and STOP BACK times to 0 (minutes). In the
BRODEF table the user may also identify a chiller as the time
broadcaster for a CCN network with TIME BROADCAST
ENABLE. There should be only one device on a CCN network
which is designated as the time broadcaster.
ALARM ROUTING (Fig. 38) — ALARM ROUTING is in
the table SERVICE/EQUIPMENT CONFIGURATION/
NET_OPT under the heading Alarm Configuration. ALARM
ROUTING consists of an 8-bit binary number. Only bits 1, 2,
and 4 (counting from the left) are used. The bits can be set by
any device which can access and change configuration tables.
If any of these 3 bits is set to 1, the ICVC will broadcast any
alarms which occur.
Bit 1: Indicates that the alarm should be read and processed by
a front end device, such as a ComfortWORKS
®
device.
Bit 2: Indicates that the alarm should be read and processed by
a TeLINK or Autodial Gateway module.
Bit 4: Indicates that the alarm should be read and processed by
an alarm printer interface (an optional module), ServiceLink,
or a DataLINK™ device.
The RE-ALARM TIME is a time period after which, if a
preexisting and previously broadcast alarm has not been
cleared, it will be rebroadcast on the CCN network.
Other Tables — The CONSUME, NET_OPT, and RUN-
TIME screens contain parameters used with a CCN system.
See the applicable CCN manual for more information on these
screens. These tables can only be defined from a CCN
Building Supervisor.
Perform a Control Test — Check the safety controls
status by performing an automated control test. Access the
CONTROL TEST table and select a test to be performed func-
tion (see Tables 11 and 12).
The Automated Control Test checks all outputs and inputs
for function. The compressor must be in the OFF mode to
operate the controls test. The compressor can be put in OFF
mode by pressing the STOP push-button on the ICVC. Each
test asks the operator 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 proceed to the next test.
When the control test is finished or the softkey is
pressed, the test stops, and the CONTROL TEST menu dis-
plays. If a specific automated test procedure is not completed,
access the particular control test to test the function when
ready. The CONTROL TEST menu is described in Table 11.
Table 11 — Control Tests
NOTE: During any of the tests, an out-of-range reading will have an asterisk
(*) next to the reading and a message will be displayed.
The EVAPORATOR PRESSURE, CONDENSER PRES-
SURE, DISCHARGE PRESSURE, and OIL PRESSURE
DELTA P pressure transducers should be calibrated prior to
start-up. If pressure transducers are installed on the waterbox
nozzles, CHILLED LIQUID DELTA P and CONDENSER
LIQUID DELTA P transducers should also be calibrated.
Pressure Transducer and Optional Flow
Device Calibration —
Transducers measuring single
pressure values (such as CONDENSER PRESSURE and
EVAPORATOR PRESSURE) are calibrated individually, while
a pair of transducers measuring a pressure differential (OIL
PRESSURE DELTA P, CHILLED LIQUID DELTA P, or
CONDENSER LIQUID DELTA P) are calibrated together as a
differential. Transducers for sensing liquid side flow are not
provided as standard. Oil pressure, refrigerant pressure and
liquid delta P readings can be viewed and calibrated from the
COMPRESS and HEAT_EX screens on the ICVC controller.
Each transducer or transducer pair can be calibrated at two
points: “zero” (0 psig or 0 kPa) and “high end” (between 25
and 250 psig, or between 173 and 1724 kPa). It is good prac-
tice to calibrate at initial start-up. Calibration is particularly
important at high altitudes to ensure the proper refrigerant
temperature-pressure relationship.
ZERO POINT CALIBRATION — Shut down the compres-
sor, and cooler and condenser pumps. There must be no water
flow through the heat exchangers, but these systems must be
filled. For differential pairs, leave the transducers installed. For
single value transducers, disconnect the transducer’s electrical
cable, remove the sensor from its Schrader fitting, then recon-
nect the cable.
NOTE: If the cooler or condenser vessels are at 0 psig (0 kPa)
or are open to atmospheric pressure, the transducers can be
calibrated for the zero point without removal.
1
1
0
1
0
0
0
0
Alarm Printer Interface Module
Autodial Gateway
Local Building Supervisors(s)
or ComfortWORKS
unused
ALARM CONTROL
ALARM ROUTING
Alarm routing settings should be left at default settings and only be
changed by technicians trained in CCN. These settings determine
which CCN system elements will receive and process alarms sent
by the ICVC. Input for the decision consists of eight digits, each of
which can be set to either 0 or 1. Setting a digit to 1 specifies that
alarms will be sent to the system element that corresponds to that
digit. Setting all digits to 0 disables alarm processing. Digits in
this decision correspond to CCN system elements in the following
manner:
NOTE: If your CCN does not contain ComfortWORKS
®
controls or a
Building Supervisor or Autodial Gateway to serve as an alarm
acknowledger, set all digits in this decision to 0 in order to prevent
unnecessary activity on the CCN Communication Bus.
Allowable Entries 00000000 to 11111111
0 = Disabled, 1 = Enabled
Default Value 10000000
Fig. 38 — Alarm Control and Alarm Routing
a19-1627
CCM Thermistors Check of all thermistors.
CCM Pressure
Transducers
Check of all transducers.
Pumps
Checks operation of pump outputs; pumps are activated.
Also tests associated inputs such as flow or pressure.
Discrete Outputs Activation of all on/off outputs individually.
Oil Reclaim
Output
Checks CCM 4-20mA oil reclaim output with
power removed from oil reclaim actuator.
Head Pressure
Output
Manually varies the head pressure output
from low voltage field wiring terminal strip.
Pumpdown/
Lockout
Pumpdown prevents the low refrigerant alarm during
evacuation so refrigerant can be removed form the unit.
Also locks the compressor off and starts the liquid
pumps.
Terminate
Lockout
To charge refrigerant and enable the chiller
to run after pumpdown lockout.
EXIT