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Mini-Mate2 MMD24E
Liebert Mini-Mate2 MMD24E User Manual
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Precision Cooling
For
Bu
siness-Criti
cal C
ontinuity™
Li
eb
er
t M
i
n
i
-
M
ate
2
™
Us
er Man
ual - 2 & 3 T
ons, 50 & 60Hz
2
Table of Contents
Default Chapter
3
Table of Contents
3
Important Safety Instructions
9
Save These Instructions
9
Figure 1 Model Number Nomenclature-Evaporator Units
11
Figure 2 Model Number Nomenclature-Air-Cooled, Indoor Condensing Units
11
Product Number Nomenclature
11
Figure 3 Model Number Nomenclature-Outdoor Air-Cooled Prop Fan Condensing Units
12
Figure 4 Model Number Nomenclature-Water/Glycol-Cooled Condensing Units
12
Figure 5 Model Number Nomenclature-Chilled Water Units
13
1 Introduction
14
Designed to Match Computer and Electronic Equipment Needs-From Installation
14
To Operation
14
2 Standard Features -2 & 3 Ton Systems
15
Evaporator Section - Split Systems
15
Condensing Unit Section-Split Systems
15
Indoor Centrifugal Fan Condensing Units
15
Outdoor Prop Fan Condensing Units
15
Indoor Water/Glycol Condensing Units
15
Chilled Water Units
15
System Controls
16
Other Standard Control Features
16
Figure 6 Wall-Box
16
3 Optional Factory-Installed Features-Evaporator/Chilled Water Units
17
Reheat
17
Humidifier
17
Sensors
17
Switches and Motors
17
Free-Cooling
18
Optional Configurations-Prop Fan Condensing Units
18
Optional Configurations-Water/Glycol Condensing Units
18
Optional Configurations-Chilled Water Units
18
Figure 7 Free-Cooling Arrangement
18
4 Ship -Loose Accessories -Field -Installed
19
Remote Monitoring, Autochangeover and Leak Detection Equipment
20
5 Site Preparation and Installation
21
Installation Considerations
21
System Configurations
21
Table 1 System Configurations - 60Hz
21
Table 2 System Configurations - 50Hz
21
Table 3 Application Limits, Evaporator and Chilled Water Units
21
Table 4 Application Limits, Indoor and Outdoor Air-Cooled Condensing Units
21
Table 5 Application Limits, Indoor Water/Glycol-Cooled Condensing Units
21
Room Preparation
22
Location Considerations
22
Figure 8 Air-Cooled Systems, 2 and 3 Tons
23
Figure 9 Water/Glycol-Cooled Systems, 2 and 3 Tons
23
Figure 10 Chilled Water Systems, 3 Tons
23
Ceiling Unit Weights
24
Equipment Inspection-Upon Receipt
24
Packaging Material
24
Installing the Ceiling Units
24
Table 6 Ceiling Unit Weights
24
Close-Coupled Installations
25
Evaporator Air Distribution
25
Figure 11 Threaded Rod and Hardware Kit Installation
25
Piping Connections and Coolant Requirements
26
Table 7 Cooling Unit Air Flow at 0.3 IWG (75PA) ESP
26
Figure 12 Refrigerant Piping Diagram
29
Table 10 Line Charges - Refrigerant Per 100 Ft. (30M) of Type L Copper Tube
30
Table 11 Refrigerant Charge in Liebert Pre-Charged R-407C Line Sets
30
Table 12 Equivalent Lengths for Various Pipe Fittings, Ft (M)
30
Table 8 Recommended Refrigerant Line Sizes
30
Table 9 Pipe Length and Condenser Elevation Relative to Evaporator
30
Table 13 Refrigerant Charge
31
Table 14 Connection Sizes and Torque
31
Figure 13 Dimensions, Evaporator and Chilled Water Units with Direct Drive Blower
32
Table 15 Net Weights-Evaporator and Chilled Water Units
32
Figure 14 Dimensions, Evaporator Units with Optional Belt Drive Blower Assembly
33
Table 16 Net Weight, High Static Blower Module
33
Figure 15 Evaporator and Chilled Water Unit Piping Data
34
Condensate Pump Kit Installation-All Units
35
Electrical Connections
35
Figure 16 Evaporator and Chilled Water Unit Electrical Connections
37
Indoor Air-Cooled Centrifugal Fan Condensing Unit Installation
38
Location Considerations
38
Electrical Connections
38
Figure 17 Close-Coupled Installation
38
Piping Connections
39
Ducting
39
Table 17 Indoor Condensing Unit Airflow, CFM at 0.5 Iwg Esp
39
Figure 18 Indoor Air-Cooled Centrifugal Condenser Dimensions and Pipe Connections
40
Table 18 Centrifugal Condenser Dimensions, Weights
40
Figure 19 Centrifugal Condenser Electrical Connections
41
Outdoor Air Cooled Condensing Unit Installation
42
Location Considerations
42
Figure 20 Cabinet and Floor Planning Dimensional Data, Outdoor Condensing Unit
42
Piping Connections
43
Electrical Connections
43
Table 19 Dimensions and Net Weights-Air-Cooled Outdoor Condensing Units
43
Water and Glycol Cooled Condensing Unit
44
Location Considerations
44
Figure 21 General Arrangement (Air- Cooled Condensing Unit)
44
Figure 22 Cabinet Dimensions and Piping Data, Water/Glycol Indoor Condensing Module
45
Table 20 Net Weight, Indoor Water/Glycol-Cooled Condensing Unit
45
Electrical Connections
46
Piping Connections
46
Figure 23 General Arrangement, Water/Glycol Split Systems
47
Optional Equipment Piping
48
Free-Cooling Coil
48
Figure 24 Optional Free-Cooling Coil (3-Way Valve) on Water/Glycol Units
48
Hot Water Reheat Coil
49
Figure 25 Optional Hot Water Reheat (Two-Way Valve)
49
Checklist for Completed Installation
50
6 Microprocessor Control
51
Feature Overview
51
Figure 26 Control Key Locations-All-Mounted Display Box
51
Main Menu <Menu
52
Setpoints
52
Table 21 View Default Setpoints and Allowable Ranges
52
Status
53
Active Alarms
53
Time
53
Date
53
Setback
53
Table 22 Microprocessor Night and Weekend Setback
53
Setup Operation
54
Restart Time Delay
54
C/F Degrees
54
Humidity Control Method
54
Change Passwords
54
Table 23 Setup Functions, Default Values and Allowable Ranges
54
Calibrate Sensors
55
Alarm Enable
55
Alarm Time Delay
55
Common Alarm Enable
55
Table 24 Alarm Default Time Delays
55
Custom Alarms
56
6.15.1 Standard Custom Alarm Messages
56
Custom Text
56
Table 25 Switch Settings (Wall Box Board)
57
Table 26 Equipment Switch Settings (Unit Control Board)
57
Run Diagnostics (Available on Rev 1.001.0 and Higher)
58
Figure 27 Control Menu
59
Figure 28 Control Board (Inside Evaporator)
60
Figure 29 Wall Box Board
60
7 System Performance Microprocessor Controls
61
Temperature Control
61
Cooling/Heating Required
61
Cooling Operation (Cooling, Compressorized Direct Expansion and Chilled Water)
61
Table 27 Cooling and Dehumidification Load Response of Hot Gas Bypass
61
Heating Operation
62
Figure 30 Ground Current Detector
62
Humidity Control
63
Dehumidification/Humidification Required
63
Dehumidification Operation, Compressorized Direct Expansion (DX) Systems
63
Humidification Operation
63
Load Control Features
63
Communication
63
8 Alarms
64
Standard Alarms: Definitions and Troubleshooting
64
Custom Alarms
64
High Head Pressure
64
Humidity Level
65
Temperature
65
Humidifier Problem Alarm
65
High Water Alarm
65
Loss of Power
65
Short Cycle
66
Optional/Custom Alarms
66
Change Filter
66
High Temperature Sensor
66
Smoke Detected
66
9 System Testing and Maintenance
67
System Testing
67
Environmental Control Functions
67
Cooling
67
Heating
67
Humidification
67
Dehumidification
67
High Temperature Sensor-Optional
67
Smoke Detector Sensor
67
Remote Shutdown
67
Maintenance
68
Electric Panel
68
Filters
68
Direct Drive Blower Package
68
High Static Belt Drive Blower Package (Option)
69
Refrigeration System
69
Table 28 External Static Pressure Available
69
Table 29 Typical Discharge Pressure
69
Figure 31 Hot Gas Bypass
71
Humidifier Circuit Board Adjustments
72
Replacement Procedures
73
Compressor Replacement
73
Table 30 DIP Switch Settings for Humidifier Control Board
73
Electrical Failure
74
Replacing the Humidifier Canister
75
10 Maintenance Inspection Checklist
76
11 Troubleshooting
77
Table 31 Troubleshooting
77
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Liebert Mini-Mate2 MMD24E Specifications
General
Brand
Liebert
Model
Mini-Mate2 MMD24E
Category
Air Conditioner
Language
English
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