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SECTION 33 - SYSTEM CALIBRATION, SERVICE SETPOINTS, AND RESET PROCEDURES
FORM 160.54-M1
ISSUE DATE: 10/25/2019
JOHNSON CONTROLS
JCI COMPANY CONFIDENTIAL
33
The refrigerant Level Sensor, located in the Condenser,
must be properly calibrated to accurately detect the re-
frigerant level in the Condenser. The procedure below
is used to perform this calibration.
Enable/Disable
If the chiller is equipped with the Refrigerant Level
Control, Level control operation must be ENABLED.
Otherwise, it must be DISABLED. Use following pro-
cedure:
1. At the keypad, log in at SERVICE access level,
using access code 1 3 8 0.
2. Select SETPOINTS Screen. From SETPOINTS
Screen select SETUP Screen. From SETUP
Screen select OPERATIONS Screen.
3.
Use ◄
and
►
keys to select Enable or Disable.
4. Press ENTER (
) key.
Setpoints
The following are the setpoints and range of program-
mable values. The DEFAULT value is shown in pa-
renthesis. The DEFAULT value is the recommended
value and should provide proper operation in most ap-
plications. However, the setpoint can be programmed
to other values to compensate for local operating con-
ditions. There are two different setpoint sets used de-
pending upon the software vintage. Select the appro-
priate procedure per the installed software as follows:
Software version C.MLM.01.11.xxx (and earlier) or
C.OPT.01.11.xxx (and earlier).
a. Level setpoint - 20% to 80% (50%).
b. Level Control Period - 1.0 to 5.0 seconds. 3.5
to 30 seconds (Flash memory card version
C.MLM.01.06.xxx and later and P compres-
sors with C.MLM.04.02.xxx).
The Default value varies depending upon
the Flash memory card version and com-
pressor application: versions C.MLM.01.06.
xxx (and earlier) (3.5 seconds); version
C.MLM.01.07.xxx and later (10.0 seconds P
compressors; 3.5 seconds all other compres-
sors).
c. Proportion Limit Open - 10% to 50% (15%).
d. Proportion Limit Close - 10% to 50% (45%).
e. Rate Limit Open - 10% to 50% (10%)
5% to 50% (10%) (Flash memory card
version C.MLM.01.06.xxx and later or
C.MLM.04.02.xxx).
f. Rate Limit Close - 10% to 50% (10%).
5% to 50% (10%) (Flash memory card
version C.MLM.01.06.xxx and later or
C.MLM.04.02.xxx).
g. Valve Preset Time - 0 to 100 seconds (50
seconds) (Flash memory card version
C.MLM.01.07.xxx and later).
h. Ramp-up Time - 3 to 15 minutes (8 minutes)
(Flash memory card version C.MLM.01.07.
xxx and later).
1. At the keypad, log in at SERVICE access level
using access code 1 3 8 0.
2. Select REFRIGERANT LEVEL CONTROL
Screen from the CONDENSER Screen.
3. On the REFRIGERANT LEVEL CONTROL
Screen, select the setpoint to be programmed or
press the SETPOINTS key for more setpoints.
4. Using the numeric keypad keys, enter desired
value.
5. Press ENTER (
) key.
Software version C.MLM.01.14.xxx (and later) or
C.OPT.01.14.306(and later)
Zone 1
Zone 2
Rate Limit
3% to 15%
3% to 15%
Default 7
Default 5
Period (seconds)
8 to 22
2.5 to 10
default 15
Default 2.5
Zone 1 and Zone 2
Level Setpoint
20% to 80%
Default 50%.
(30% software version C.OPT.01.18.307 (and earlier))
Valve Preset Time (setpoint) (seconds) 0 to 100
Default 50
Ramp Up Time (setpoint) (minutes)
3 to 15
Default 8
Proportion Error Deadband - +0%
Rate Error Deadband – +0%
