FORM 160.54-M1(503)
149
YORK INTERNATIONAL
23
View the Setpoint changes as follows:
1. At the Keypad, login at SERVICE Access Level
us ing access code 1 3 8 0.
2. From the HISTORY Screen, select SECURITY
LOG Screen to view the complete list of setpoint
chang es.
3. To view the details of a particular setpoint change,
select it with the LOG ENTRY key, then press
VIEW DETAILS key. This causes a jump to the
SECURITY LOG DETAILS Screen where the
setpoint change details are displayed.
CHILLER STYLE/COMPRESSOR
(Flash Memory Card version C.MLM.01.07.xxx and
later)
If equipped with Flash memory Card version
C.MLM.01.07.xxx and later, the Chiller Style/
Compressor combination must be entered.
The various YK chiller style/compressor combinations
are equipped differently and have different control re-
quirements. Variables include the following:
• High Speed Thrust bearing proximity sensing
– Proximity Probe input at Microboard J8-15 or
Limit Switch input at I/O Board TB3-81.
• Flow Sensor – Paddle type or Factory Mounted
Thermal Type. The paddle type applies 115Vac to
the I/O Board DIGITAL inputs TB4-12 (evapora-
tor) and TB4-11 (condenser). The factory mounted
thermal type (available with style F chillers), ap-
plies +5Vdc to the microboard ANALOG inputs
at J7-14 (evaporator) and J7-16 (condenser). Flash
Memory Card version C.MLM.01.07.xxx and
C.MLM.01.07A.xxx automatically selects the
Flow Sensor input, either Analog or Digital per the
Chiller Style/Compressor Setpoint selection. Flash
Memory Card version C.MLM.01.08.xxx (and
later), allows the use of either the Thermal type
(Analog) or Paddle-type (Digital) fl ow sensors in
the style F chillers. With these versions, the actual
Flow Sensor type present must be entered using the
Flow Switch Setpoint.
• Oil Heater Outputs – Either TB1-34 or TB1-64 on
I/O Board
• Refrigerant Level Control Default Period – Either
3.5 seconds or 10.0 seconds
• “Oil – Variable Speed Pump-Pressure Setpoint Not
Achieved” safety shutdown threshold – Either 25
PSID or 35 PSID
Flash Memory Card version C.MLM.01.07.xxx and
later are applicable and backward compatible to all
YK chiller style/compressor combinations. They
contain all control variables for all combinations. For
correct chiller control, the correct CHILLER STYLE/
COMPRESSOR combination must be entered. Once the
applicable Chiller/Compressor combination is entered,
the program automatically bundles the functionality and
chiller control per the tables below.
For example, if equipped with C.MLM.01.08.105A
(or later):
Example 1:
If the chiller is a style F and equipped with a J or H3
compressor, enter “Style F/J,H3 Compr”. The program
will read the Proximity Probe input at Microboard J8-
15, control the Oil Heater from TB1-64, make the Level
Control Period Default 3.5 seconds, the Oil Pressure
safety threshold below is 35 PSID and will read the
Flow Sensor inputs at either I/O Board TB4-11/12 or
Microboard J7-14/16 as programmed with the FLOW
SWITCH Setpoint.
Example 2:
If the chiller is a style E and equipped with a P compres-
sor, enter “Style E/P Compr”. The program then reads the
Proximity Limit Switch at I/O Board TB3-81, controls
the Oil Heater from TB1-64, makes the Level Control
Period Default 10.0 seconds, the Oil Pressure safety
threshold below would be 25 PSID and reads the Flow
Sensor input at I/O Board TB4-11/12.
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