30XA080-500
Air-Cooled Liquid Chillers
60 Hz
Controls, Start-Up, Operation, Service
and Troubleshooting
CONTENTS
Page
SAFETY
CONSIDERATIONS
......................
2
GENERAL
......................................
2-4
Conventions
Used in This
Manual
................
2
Display
Module
Usage
...........................
3
•
NAVIGATOR
TM
DISPLAY
MODULE
CONTROLS
...................................
4-41
General
..........................................
4
Main Base Board (MBB)
..........................
4
Compressor
Protection
Module
(CPM)
...........
6
Electronic
Expansion
Valve (EXV)
Board
.........
9
Fan Boards ......................................
11
Enable-Off-Remote
Contact
Switch
(SWl)
.......
13
Emergency
On/Off
Switch
(SW2) ................
13
Energy
Management
Module
(EMM) .............
13
Local Equipment
Network
.......................
14
Board Addresses
................................
14
Control
Module
Communication
.................
14
•
RED LED
•
GREEN LED
•
YELLOW
LED
Carrier
Comfort
Network®
(CCN)
Interface
......
15
Configuration
Options
..........................
15
•
RAMP LOADING
•
MINUTES
OFF TIME
Dual Chiller
Control
.............................
15
•
DUAL CHILLER
PUMP CONTROL
FOR PARALLEL
APPLICATIONS
•
DUAL CHILLER
PUMP CONTROL
FOR SERIES
CHILLER
APPLICATIONS
Capacity
Control
................................
16
•
EQUAL
LOADING
•
STAGE LOADING
•
CAPACITY
CONTROL
OVERRIDES
Head
Pressure
Control
..........................
22
•
LOW AMBIENT
TEMPERATURE
HEAD PRESSURE
CONTROL
OFf'ION
•
LOW AMBIENT
TEMPERATURE
HEAD PRESSURE
CONTROL
OPERATING
INSTRUCTIONS
Machine
Control
Methods
.......................
29
•
SWITCH
CONTROL
•
TIME SCHEDULE
•
CCN CONTROL
•
UNITRUN
STATUS
Cooling
Set Point Selection
.....................
3O
•
SET POINT
1
•
SET POINT
2
•
4 TO 20 mA INPUT
•
DUAL SWITCH
•
ICE MODE
•
SET POINT
OCCUPANCY
Temperature
Reset
..............................
31
Demand
Limit ...................................
32
•
I-STEP
SWITCH
CONTROLLED
•
2-STEP
SWITCH
CONTROLLED
Page
• EXTERNALLY POWERED (4 to 20 mA Controlled)
• CCN LOADSHED CONTROLLED
Remote
Alarm and Alert Relays
.................
4O
PRE-START-UP
..................................
41
System
Check ...................................
41
START-UP ....................................
42-48
Actual Start-Up ..................................
42
Operating
Limitations
...........................
42
• TEMPERATURES
• VOLTAGE
• MINIMUM FLUID LOOP VOLUME
• FLOW RATE REQUIREMENTS
OPERATION ..................................
48-55
Sequence
of Operation
..........................
48
• ACTUATED BALL VALVE (ABV)
Dual Chiller Sequence
of Operation
.............
49
• PARALLEL PUMP OPERATION
Operating Modes ................................
49
Sensors .........................................
52
• THERMISTORS
• TRANSDUCERS
SERVICE .....................................
56-66
Economizer
Assembly
..........................
56
Electronic
Expansion
Valve (EXV) ...............
56
• MAIN EXV CONTROL
• ECONOMIZER EXV CONTROL
• EXV TROUBLESHOOTING
PROCEDURE
Compressor
Assembly
..........................
59
• COMPRESSOR
OIL SYSTEM
Cooler ...........................................
61
• SUCTION SERVICE VALVE
• FREEZE PROTECTION
• LOW FLUID TEMPERATURE
• LOSS OF FLUID FLOW PROTECTION
• TUBE PLUGGING
• RETUBING
• TIGHTENING COOLER HEAD BOLTS
• INSPECTING/CLEANING
HEAT EXHANGERS
• WATER TREATMENT
• CHILLED WATER FLOW SWITCH
Condenser
Coil Maintenance and Cleaning
Recommendations
............................
64
• REMOVE SURFACE LOADED FIBERS
• PERIODIC CLEAN WATER RINSE
• ROUTINE CLEANING OF COIL SURFACES
Condenser
Fans
................................
65
Refrigerant
Circuit
..............................
65
• LEAK TESTING
• REFRIGERANT CHARGE
Safety
Devices
..................................
66
• COMPRESSOR
PROTECTION
• OIL SEPARATOR HEATERS
• COOLER PROTECTION
Relief Devices ...................................
66
• PRESSURE RELIEF VALVES
Manufacturer
reserves the right to discontinue, or change at any time, specifications
or designs
without notice and without incurring obligations.
Catalog No. 533-00069
Printed in U,S.A,
Form 30XA-1T
Pg 1
12-05
Replaces:
New