Table of Contents
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P
N
RODUCT
UMBER
Figure 1
Model number nomenclature—Evaporator units
MM = Liebert Mini-Mate2
D = Disconnect Switch
0 = No Disconnect Switch
MM
D
Refrigerant
7 = R-407C
Figure 2
Model number nomenclature—Air-cooled, indoor condensing units
MC = Liebert Mini-Mate2 indoor condensing units
MC
D
N
OMENCLATURE
Nominal Capacity
Unit Type
E = Split Evaporator
K = Split Evaporator with Free-Cooling
36
E
Supply Power
P = 208/230V - 1 ph - 60Hz
X = 277V - 1 ph - 60Hz
S = 220V - 1 ph - 50Hz (3-ton only)
A = 460V - 3 ph - 60Hz (3-ton only)
Y = 208/230V - 3 ph - 60Hz (3-ton only)
M = 380/415V - 3ph - 50Hz (3-ton only)
D = Disconnect Switch
0 = No Disconnect Switch
Nominal Capacity
24 = 2-ton, 60Hz
35 = 3-ton, 50Hz
36 = 3-ton, 60Hz
36
A
Head Pressure Controls
L = Liebert Lee-Temp
Blower Type
D = Direct Drive
B = Belt Drive
7
A
H
Humidification
H = Canister Humidifier
0 = No Humidifier
R = Remote Humidifier Contact
J = Canister Humidifier and Remote
Humidifier Contact
Sensor Packages
0 = None
A = Filter Clog
B = Smoke Sensor
C = High-Temperature Sensor
D = Filter Clog & Smoke Sensor
E = Filter Clog & High-Temperature Sensor
F = Smoke Sensor & High-Temperature Sensor
G = Filter Clog, Smoke Sensor & High-Temperature Sensor
Cooling Method
A = Air-Cooled
L
™
Receiver
3
Product Number Nomenclature
Internal Blower
External Blower
E
D
Reheat Type
0 = No Reheat
E = Electric Reheat
S = SCR Reheat (not available
with free-cooling)
Supply Power
P = 208/230V - 1 ph - 60Hz
X = 277V - 1 ph - 60Hz
S = 220V - 1 ph - 50Hz (3-ton only)
A = 460V - 3 ph - 60Hz (3-ton only)
Y = 208/230V - 3 ph - 60Hz (3-ton only)
M = 380/415V - 3ph - 50Hz (3-ton only)
Refrigerant
7 = R-407C
A
H
Liebert
A
7
H = Hot Gas
Bypass
®
™
Mini-Mate2
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Table of Contents
Troubleshooting
Need help?
Do you have a question about the Mini-Mate2 MMD24E and is the answer not in the manual?
Questions and answers
Low suction & head pressure w/ glycol system & free cooling. Inlet cooling water 56 degrees, 10# diff. press, recovered refrigerant & weighed in proper charge 96oz.
Low suction and head pressure in a Liebert Mini-Mate2 MMD24E with a glycol system and free cooling could be caused by:
1. Low Glycol Solution Level – Insufficient glycol in the system can reduce heat transfer efficiency.
2. Improper Glycol Concentration – Incorrect glycol mixture can affect system performance.
3. Low Water/Glycol Temperature – If the temperature is too low, the free-cooling coil may take over, reducing suction and head pressure.
4. Restricted Flow in the System – Blockages or closed valves in the glycol piping can limit circulation.
5. Malfunctioning Three-Way Valve – If the free-cooling valve does not function correctly, it may divert flow improperly.
6. Dirty or Clogged Coil – A buildup of debris on the free-cooling coil can restrict heat exchange.
7. Air in the System – Entrapped air can reduce efficiency and cause pressure issues.
8. Pump Issues – A faulty or improperly sized pump may not circulate glycol effectively.
Checking glycol levels, valve operation, and system cleanliness can help diagnose the issue.
This answer is automatically generated