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IM 743
McQuay IM 743 User Manual
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OM 780-2
Page 75
Figure 37. Example of Pump Sequenc
e Order Table (Main > Configuration > Load Flow Control)
An ex
ample of the pu
mp sequence order table is s
hown in
Figure 37. Notice that this sy
stem
has fi
ve pumps an
d five
stages. By
comparing row
s, you
can see that this sequ
ence order is as follow
s:
1.
Pum
p #2
2.
Pum
p #1
3.
Pum
p #3
4.
Pum
p #5
5.
Pum
p #4
74
76
Table of Contents
Default Chapter
2
Table of Contents
2
Figures
4
Tables
5
Limited Warranty
6
Notice
6
Reference Documents
7
Revision History
7
CSM Software ID
7
Figure 1. Key to Software Identification
7
Chiller Unit Controller Software Compatibility
8
Table 1. Chiller Unit Controller Program Code Software Compatibility
8
Introduction
9
Figure 2. System Architecture
9
Getting Started
11
Connecting to the CSM
11
PC Requirements
11
Connecting Your PC to the CSM
11
Changing the Csm's IP Address and Date/Time
13
Figure 3. Enter Network Password
14
Figure 4. Niagara Web Administration
15
Connecting to the Csm's User Interface
16
Figure 5. Csm's User Interface Main Screen (Http://<Ip Address>)
17
Connecting to the Csm's User Interface Remotely Using a Modem
18
Using the Csm's User Interface
18
Figure 6. Example of a Configuration Screen (Main > Configuration > System Control)
19
Password Protection
20
Configuring User Accounts
20
Figure 7. User Admin Screen (Main > Configuration > BAS Config > USER ADMIN-Button)
20
User Account Categories
21
Table 2. Default Passwords
21
Table 3. User Admin (Main > Configuration > BAS Config > USER ADMIN-Button)
21
Connecting Chillers and Remote I/O to the CSM
22
On Works
22
Figure 8. Device Addressing (Main > Configuration > Device Addressing)
22
Commissioning a Chiller to a CSM Chiller Number
23
Table 4. Device Addressing (Main > Configuration > Device Addressing)
23
Commissioning a Remote I/O Module to a CSM Remote I/O Letter
24
Figure 9. Service Pin Location on the Microtech II Chiller LON WORKS Communication Module
24
Setting up the Csm's Chiller Data
25
Table 5. Chiller Setup (Main > Configuration > Chiller Setup)
25
Communication Loss Control at the Chiller
26
Setting up the Csm's I/O
27
Table 6. I/O Config (Main > Configuration > I/O Config)
27
Chiller Unit Controller Settings
30
Table 7. Chiller Unit Controller Setup Variables
31
Configuring the Chiller System Manager
32
System Control
32
CSM Control Mode
32
Table 8. System Control (Main > Configuration > System Control)
32
Rapid Restart
33
Low Ambient Lockout
33
Chiller Sequencing Control
34
Sequence Order
34
Figure 10. Chiller Sequence Order Table (Main > Configuration > Chiller Seq)
34
Table 9. Chiller Seq - Chiller Sequencing Order (Main > Configuration > Chiller Seq)
34
Sequencing Logic
36
Table 10. Chiller Seq - Chiller Sequencing Logic (Main > Configuration > Chiller Seq)
36
Figure 11. Typical Primary-Only System
38
Figure 12. Typical Primary-Secondary System
39
Special Sequencing Logic
40
Designating a Standby Chiller
42
Sequencing Chillers with Series-Piped Evaporators
42
Figure 13. Chiller System with Evaporators Piped in the Series/Parallel Configuration
43
Table 11. Example of a Typical Sequence Order with Series-Piped Chillers
43
Stage-Up Inhibiting
44
Load Limiting Control
45
Demand Limiting
45
Table 12. Load Limiting (Main > Configuration > Load Limiting)
45
Figure 14. Screw Chiller Demand Limiting
46
Load Balancing
47
Figure 15. External Signal Demand Limiting Function
47
Soft Loading
48
Figure 16. Soft Load Limit Function
48
Chilled Water Temperature Control
49
Table 13. Chilled Water Supply Temp (Main > Configuration > Chilled Water Supply Temp)
49
Temperature Control
50
Figure 17. CSM Leaving Evaporator Water Temperature Setpoint Flow Chart
51
Figure 18. Typical System with Isolated Chillers
52
Setpoint Reset
52
Figure 19. Return Water or Outdoor Air Reset (English)
53
Figure 20. Return Water or Outdoor Air Reset (SI)
54
Figure 21. External Reset (English)
55
Figure 22. External Reset (SI)
55
Cooling Tower Control
56
Table 14. Clg Tower Control (Main > Configuration > Clg Tower Control)
56
Figure 23. Typical Condenser Water Loop
59
Tower Staging Logic
59
Figure 24. Tower Stage Table (Main>Configuration>Clg Tower Control>Tower Stage Table)
60
Table 15. Actual Cooling Tower Staging
60
Figure 25. Tower Staging Only
62
Figure 26. Tower Staging with Low-Limit Controlled Bypass Valve
63
Figure 27. Tower Staging with Intrastage Controlled Bypass Valve
63
Tower Bypass Valve Control
65
Figure 28. Initial Tower Bypass Valve Position (English)
66
Figure 29. Initial Tower Bypass Valve Position (SI)
66
Chilled Water Flow Control
67
Table 16. Load Flow Control (Main > Configuration > Load Flow Control)
67
Figure 30. Configuration 1: Constant-Speed Single Pump
69
Figure 31. Configuration 2: Constant-Speed Lead/Standby Pump Set
70
Figure 32. Configuration 3: Constant-Speed Sequenced Pumps
70
Figure 33. Configuration 4: Variable-Speed Single Pump
70
Figure 34. Configuration 5: Variable-Speed Lead/Standby Pump Set
71
Figure 35. Configuration 6: Multiple Variable-Speed Pumps
71
Figure 36. Configuration 7: Primary-Only System
71
Pump Logic: Lead/Standby (Auto Lead, Pump 1 Lead, Pump 2 Lead)
72
Pump Logic: Single Pump
72
Pump Logic: Sequenced Constant-Speed Pumps
74
Figure 37. Example of Pump Sequence Order Table (Main > Configuration > Load Flow Control)
75
Pump Logic: Multiple Variable-Speed Pumps
77
Pump Speed Control
79
Loop Bypass Valve Control
80
Scheduling
80
Table 17. Sched (Main > Configuration > Sched)
81
Figure 38. Menu of Schedules (Main > Configuration > Sched > Schedule Icon)
82
Weekly Scheduling
82
Figure 39. Weekly Schedule (Main > Configuration > Sched > Schedule Icon > Weekly)
83
Holiday Scheduling
83
Figure 40. Calendar (Main > Configuration > Sched > Schedule Icon > Calendar)
84
Special-Event Scheduling
84
Figure 41. Special Event Schedule (Main>Configuration>Sched>Schedule Icon>Special Events)
85
Timed Override
85
Bacnet Scheduling
86
External Time Clock
86
Modbus Scheduling
86
Optimal Start
86
Table 18. Optimal Start (Main > Configuration > Optimal Start)
87
Figure 42. Optimal Start Time Line
88
Table 19. Optimal Start Time Increments (in Minutes)
88
BAS Communication
90
Bacnet Settings
90
Table 20. BAS Config - Bacnet (Main > Configuration > BAS Config)
90
Modbus Settings
91
Alarm Notification
91
Table 21. BAS Config - Modbus (Main > Configuration > BAS Config)
91
Physical Alarm Outputs
92
Table 22. Configuring Physical Alarm Outputs (Main > Configuration > Alarms)
92
Table 23. Configuring E-Mail Alarm Notification (Main > Configuration > Alarms)
92
E-Mail Alarm Notifications
93
Table 24. Configuring Bacnet Alarm Notification (Main > Configuration > Alarms)
94
Bacnet Alarm Notifications
95
Saving Your CSM Database Configuration
95
Saving the Database on the CSM
95
Saving the Csm's Configured Database Externally
95
Operator's Guide
97
Chiller System Status
97
CSM Operating State
98
Figure 43. System Status (Main > System Status)
98
Stage-Up Status
101
Stage-Down Status
101
System Capacity
102
Temperatures
102
Figure 44. Chilled Water Temperature Sensor Locations
102
Monitoring Chiller Status
103
Figure 45. Condenser Water Temperature Sensor Locations
103
Figure 46. Chiller Status (Main > System Status > Chiller Status)
104
Status (Chiller Run Mode)
104
Alarm
105
Chiller Run Time (Op Hours)
105
Clear Alarm
105
Chiller Data
106
Comp
106
Load Limiting Status
106
Chilled Water Distribution System Status
107
Cooling Tower Status
107
Override of the Chiller System Manager's Control
107
Local Override of a Chiller
107
Free Cooling BAS Network Override
108
Alarm Monitoring and Control
108
Acknowledging Alarms on the CSM
108
Figure 47. Acknowledging Alarms (Main > View Alarms)
108
Clearing CSM Alarms
109
Clearing Chiller Alarms
109
CSM Alarms and Their Effect on System Control
109
Table 25. CSM Alarms
109
Fault Alarms
111
Problem Alarms
112
Warning Alarms
116
Troubleshooting
118
Using Status Leds
118
Figure 48. Main Board Layout
118
Ethernet Port
119
Heartbeat
119
Lon Port
119
Serial Ports
119
Troubleshooting the Pc's Connection to the CSM
119
Checking the IP Address and Subnet Mask of Your Computer
120
Determining the Csm's IP Address and Subnet Mask
120
Figure 49. Performing the "Ipconfig" Command at the DOS Prompt
120
Figure 50. IP Address Read from a Hyperterminal Boot Sequence
122
Table 26. DB-9 to RJ-45 Null Modem Adapter Pin Assignments
122
Pinging the CSM from Your Computer
123
Checking Internet Explorer Settings
124
Figure 51. Performing the "Ping" Command at the DOS Prompt
124
Figure 52. Important Microsoft Internet Explorer Options
125
Appendix A: Hardwired Chiller Control
126
Setting up the Csm's Additional Chiller Data for a Hardwired Chiller
126
Table 27. Hardwired Chiller Config (Main > Configuration > Chiller Setup)
126
Chiller % RLA from a Hardwired Chiller
127
Figure 53. External Demand Limiting Function Signal
128
Hardwired Chiller - Chilled Water Temperature Control
128
Hardwired Chiller - Load Limiting Control
128
Hardwired Chiller Unit Controller Settings
129
Figure 54. Hardwired Chiller Leaving Water Temperature Setpoint Reset (English)
129
Figure 55. Hardwired Chiller Leaving Water Temperature Setpoint Reset (SI)
129
Hardwired Chiller Sequence of Operation
130
Unavailable and Available Hardwired Chillers
130
Chiller Startup
130
Table 28. Chiller Unit Controller Setup Variables
130
Chiller Shutdown
131
Hardwired Chiller Alarms
131
Chiller Fault Alarms
131
Chiller Problem Alarms
132
CSM Alarms Available for Hardwired Chillers
132
Table 29. CSM Alarms Available for Hardwired Chillers
132
Chiller Data
133
Hardwired Chiller - Communication Loss Control at the Chiller
133
Index
134
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McQuay IM 743 Specifications
General
Brand
McQuay
Model
IM 743
Category
Controller
Language
English
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