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Set Up Machine Control Configuration
Do not operate the machine before the control configu-
rations have been checked and a Control Test has been
satisfactorily completed. Protection by safety controls
cannot be assumed until all control configurations have
been confirmed.
As configuration of the 17/19EX unit is performed, write
down all configuration settings. A log, such as the one shown
on pages CL-1 to CL-12, provides a convenient list for con-
figuration values.
Input the Design Set Points —
Access the LID 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
can control a set point to either the leaving or entering chilled
water. This control method is set in the Equipment Configu-
ration table, Config table.
Input the Local Occupied Schedule (OCCPC01S)
—
Access the schedule OCCPC01S screen on the LID and
set up the occupied time schedule per 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 sched-
ule, see the Controls section, page 12.
The CCN Occupied Schedule (OCCPC03S) should be con-
figured if a CCN system is being installed or if a secondary
time schedule is needed.
The Ice Build Occupied Schedule (OCCPC02S) should
be configured for Ice Build applications.
Input Service Configurations —
The following con-
figurations require the LID screen to be in the Service por-
tion of the menu.
• password
• input time and date
• LID configuration
• controller identification
• service parameters
• equipment configuration
• automated control test
PASSWORD — When accessing the Service tables, a pass-
word must be entered. All LIDs are initially set for a pass-
word of 1-1-1-1. This password may be changed in the LID
configuration screen, if desired.
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. ‘‘Holiday Today’’ should only be
configured to ‘‘Yes’’ if the present day is a holiday.
CHANGE LID CONFIGURATION IF NECESSARY — The
LID Configuration screen is used to view or modify the LID
CCN address, change to English or SI units, and to change
the password. If there is more than one machine at the job-
site, change the LID address on each machine so that each
machine has its own address. Note and record the new ad-
dress. Change the screen to SI units as required, and change
the password if desired. A copy of the password should be
retained for future reference.
MODIFY CONTROLLER IDENTIFICATION IF NECES-
SARY — The controller identification screen is used to change
the PSIO module address. Change this address for each ma-
chine if there is more than one machine at the job-
site. Write the new address on the PSIO module for future
reference.
INPUT EQUIPMENT SERVICE PARAMETERS IF NEC-
ESSARY — The Equipment Service table has 3 service tables:
Service1, Service2, and Service3.
Configure SERVICE1 Table — Access Service1 table to
modify/view the following to jobsite parameters:
Chilled Medium
Water or Brine?
Brine Refrigerant Trippoint Usually 3° F (1.7° C) below design
refrigerant temperature
Surge Limiting or
Hot Gas Bypass Option
Is HGBP installed?
Minimum Load Points
(T1/P1)
Per job data — See Modify Load
Points section
Maximum Load Points
(T2/P2)
Per job data — See Modify Load
Points section
Motor Rated Load Amps
Per job data
Motor Rated Line Voltage
Per job data
Motor Rated Line kW
Per job data (if kW meter installed)
Line Frequency
50 or 60 Hz
Compressor Starter Type
Reduced voltage or full?
Stop-to-Start Time*
Follow motor vendor recommenda-
tion for time between starts. See
certified prints for correct value.
*Open-drive machines only.
NOTE: Other values are left at the default values. These may be changed
by the operator as required. Service2 and Service3 tables can be modi-
fied by the owner/operator as required.
Modify Minimum and Maximum Load Points (
D
T1/P1;
D
T2/P2) If Necessary —These pairs of machine load points,
located on the Service1 table, determine when to limit guide
vane travel or to open the hot gas bypass valve when surge
prevention is needed. These points should be set based on
individual machine operating conditions.
If, after configuring a value for these points, surge pre-
vention is operating too soon or too late for conditions, these
parameters should be changed by the operator.
Example of configuration: Machine operating parameters
Refrigerant used: HFC-134a
Estimated Minimum Load Conditions:
44 F (6.7 C) LCW
45.5 F (7.5 C) EWC
43 F (6.1 C) Suction Temperature
70 F (21.1 C) Condensing Temperature
Estimated Maximum Load Conditions:
44 F (6.7 C) LCW
54 F (12.2 C) ECW
42 F (5.6 C) Suction Temperature
98 F (36.7 C) Condensing Temperature
Calculate Maximum Load — To calculate maximum load
points, use design load condition data. If the machine full
load cooler temperature difference is more than 15° F
(8.3° C), estimate the refrigerant suction and condensing tem-
peratures at this difference. Use the proper saturated pres-
sure and temperature for the particular refrigerant used.
Suction Temperature:
42 F (5.6 C) = 37 psig (255 kPa) saturated
refrigerant pressure (HFC-134a)
Condensing Temperature:
98 F (36.7 C) = 120 psig (1827 kPa) saturated
refrigerant pressure (HFC-134a)
Maximum Load
D
T2:
54 – 44 = 10° F (12.2 – 6.7 = 5.5° C)
Maximum Load
D
P2:
120 – 37 = 83 psid (827 – 255 = 572 kPad)
55
Содержание 17
Страница 13: ...Fig 6 Open Drive 17 Series Lubrication Cycle 13 ...
Страница 15: ...Fig 7 17EX Controls and Sensor Locations 15 ...
Страница 16: ...Fig 7 17EX Controls and Sensor Locations cont 16 ...
Страница 17: ...Fig 7 17EX Controls and Sensor Locations cont 17 ...
Страница 19: ...Fig 8 19EX Controls and Sensor Locations cont 19 ...
Страница 23: ...Fig 16 17 19EX LID Menu Structure 23 ...
Страница 24: ...Fig 17 17 19EX Service Menu Structure 24 ...
Страница 50: ...Fig 28 17 19EX Leak Test Procedures 50 ...