Johnson Controls YORK OPTIVIEW YK Series Service Instructions Manual page 255

FORM 160.54-M1
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).
JOHNSON CONTROLS
SECTION 32 - SYSTEM CALIBRATION, SERVICE SETPOINTS AND RESET PROCEDURES
1. At the keypad, log in at SERVICE access level
2. Select REFRIGERANT LEVEL CONTROL
3. On the REFRIGERANT LEVEL CONTROL
4. Using the numeric keypad keys, enter desired
5. Press ENTER () key.
Software version C.MLM.01.14.xxx (and later) or
C.OPT.01.14.306(and later)
Rate Limit
Period (seconds)
Level Setpoint
(30% software version C.OPT.01.18.307 (and earlier))
Valve Preset Time (setpoint) (seconds)
Ramp Up Time (setpoint) (minutes)
Proportion Error Deadband - +0%
Rate Error Deadband – +0%
1. At the keypad, login at SERVICE access level
2. Select the REFRIGERANT LEVEL CONTROL
3. Press the appropriate key to select the setpoint to
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).
using access code 1 3 8 0.
Screen from the CONDENSER Screen.
Screen, select the setpoint to be programmed or
press the SETPOINTS key for more setpoints.
value.
Zone 1
3% to 15%
Default 7
8 to 22
default 15
Zone 1 and Zone 2
using access code 1 3 8 0.
Screen from the CONDENSER Screen.
be programmed.
Zone 2
3% to 15%
Default 5
2.5 to 10
Default 2.5
20% to 80%
Default 50%.
0 to 100
Default 50
3 to 15
Default 8
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