Site Preparation and Installation
13
Liebert
®
Mini-Mate2
™
5.0
S
ITE
P
REPARATION
AND
I
NSTALLATION
5.1
Installation Considerations
The evaporator unit is usually mounted above the suspended ceiling of the space to be conditioned.
Ducted systems may be installed in a different room.
5.1.1 System Configurations
The typical system configuration has a separate evaporator or cooling unit and a condensing unit.
Chilled water systems are self-contained units. Refer to
Tables 1
and
2
and to
Figures 8
,
9
and
10
for different system combinations and unit configurations that are possible.
NOTE
Before installing unit, determine whether any building alterations are required to run piping,
wiring and ductwork. Carefully follow all unit dimensional drawings and refer to the
submittal engineering dimensional drawings of individual units for proper clearances.
Table 1
System configurations - 60Hz
Nominal
Capacity
Cooling
Unit
Condensing Unit
Indoor Air-Cooled
Centrifugal fan
Outdoor Air-Cooled
Propeller Fan
Indoor
Water/Glycol
2 Tons
MM_24E
MC_24A
PFH_27A
MC_26W
3 Tons
MM_36E
MC_36A
PFH_37A
MC_38W
MM_40C
Self-Contained - Chilled Water
Table 2
System configurations - 50Hz
Nominal
Capacity
Cooling
Unit
Condensing Unit
Indoor Air-Cooled
Centrifugal fan
Outdoor Air-Cooled
Propeller Fan
Indoor Remote
Water/Glycol-Cooled
3 Tons
MM_35E
MC_35A
PFH_36A
MC_37W
MM_39C
Self-Contained - Chilled Water
Table 3
Application limits, evaporator and chilled water units*
Input Voltage
Range of Return Air Conditions to Unit
Minimum
Maximum
Dry Bulb Temperature
Relative Humidity
-5%
+10%
65°F to 85°F (18°C to 29°C)
20% to 80%
* Unit will operate at these conditions but will not control to these extremes of conditions.
Table 4
Application limits, indoor and outdoor air-cooled condensing units
Input Voltage
Condensing
Units
Entering Dry Bulb Air Temperature
Minimum
Maximum
Minimum
Maximum
-5%
+10%
Outdoor Prop Fan
Condensing Unit
-30°F (-34°C)
115°F (46°C) standard unit*
125°F (52°C) high ambient unit*
Indoor Air-Cooled
Condensing Unit
115°F (46°C)*
* Unit capacity ratings are stated for 95°F (35°C) for standard units and 105°F (41°C) for high ambient PFH units only.
Exceeding these rating points by 20°F (11°C) will result in lower cooling capacities, but will not damage the equipment.
Table 5
Application limits, indoor water/glycol-cooled condensing units
Input Voltage
Entering Fluid Temperature
Minimum
Maximum
Minimum
Maximum
-5%
+10%
65°F (18.3°C) *
115°F (46°C)
* Operation below 65°F (18°C) may result in reduced valve life and fluid noise.
