York MILLENNIUM YB Series, Operating & Maintenance

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YORK INTERNATIONAL
QUICK REFERENCE TO FIGURES
FIG. NO. DESCRIPTION PAGE NO.
1 YG Gas Engine Drive Chiller ................................................................................... 10
1A YB Gas Engine Drive Chiller ................................................................................... 10
2 Engine Speed Control Block Diagram ..................................................................... 11
2A Engine Control Panel .............................................................................................. 15
3 Engine Control Panel .............................................................................................. 16
4 MicroComputer Control Center and Keypad ............................................................ 17
5 System Parameters – Out of Range Readings ........................................................ 19
6 Manifold Pressure vs. Engine Speed ....................................................................... 21-23
7 Keypad – Programming System Setpoints ............................................................. 27
8 Keypad – Programming “Leaving Chilled Water Temp” Setpoint .............................. 28
9 Keypad – Programming “Engine Load Limit” Setpoint ............................................. 28
10 Keypad – Programming “Pulldown Demand” Setpoint ............................................. 29
11 Keypad – Programming “Clock” Setpoint ................................................................ 29
12 Keypad – Programming “Daily Schedule” Setpoint .................................................. 30
13 Keypad – Programming “Holiday” Setpoint .............................................................. 31
14 Keypad – Programming “Remote Reset” Temp Range............................................. 31
15 Keypad – Service Keys Location ............................................................................ 32
16 MicroComputer Control Center – Location of Real Time Clock U16 ......................... 43
17 Chiller Start Sequence & Shutdown Sequence Timing Diagram ............................. 50
18 YG Chiller System Components ............................................................................. 55
18A YB Chiller System Components ............................................................................. 56
19 Saturation Curve ..................................................................................................... 67
QUICK REFERENCE TO TABLES
TABLE NO. DESCRIPTION PAGE NO.
1 Operational Thresholds Chart .................................................................................. 51
2 Causes of Normal & Safety System Shutdowns in Accordance
with the MicroComputer Control Center ................................................................. 62-63
3 Operating Analysis Chart ........................................................................................ 64-65
4 System Pressures .................................................................................................. 67
5 Refrigerant Charge YB / YG Models ........................................................................ 68