Emerson PFH020A-L, User Manual

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Site Preparation and Installation
15 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 in the space to be conditioned.
Ducted systems may be located in a different room. Refer to Figures 8 - 10 for possible configurations.
The system may be:
• Self-contained air-cooled with centrifugal condenser fan attached to the evaporator box.
• Split system air-cooled with outdoor propeller fan condensing units.
• Self-contained chiller water, requiring connection to building chilled water loop.
• Self-contained water/glycol-cooled, requiring water or glycol loop connection.
5.1.1 Room Preparation
The room should be well insulated and must have a sealed vapor barrier. The vapor barrier in the
ceiling and walls can be a polyethylene film. Paint on concrete walls and floors should contain either
rubber or plastic.
Outside or fresh air should be kept to a minimum when tight temperature and humidity control is
required. Outside air adds to the site’s cooling, heating, dehumidifying and humidifying loads. Doors
should be properly sealed to minimize leaks and should not contain ventilation grilles.
NOTE
Before installing unit, determine whether any building alterations are required to run piping,
wiring and ductwork. Follow all unit dimensional drawings and refer to the submittal
engineering dimensional drawings of individual units for proper clearances.
Table 1 Application limits - evaporator and chilled water units*
Input Voltage Range of Return Air Conditions to Unit
Minimum Maximum Dry Bulb Temp Relative Humidity
-5% +10% 65 to 85°F (10 to 29°C) 20 to 80%
* Unit will operate at these conditions but will not control to these extremes of conditions.
Table 2 Application limits - outdoor air-cooled condensing unit
Input Voltage Entering Dry Bulb Air Temperature
Minimum Maximum Minimum Maximum
-5% +10%
-30°F (34°C)
(units with Lee-Temp
receiver)
115°F (46°C)
Table 3 Application limits - water/glycol-cooled condenser
Input Voltage Entering Fluid Temperature
Minimum Maximum Minimum Maximum
-5% +10% 45°F (7°C)* 115°F (46°C)
* Operation below 65°F (18°C) may result in reduced valve life and fluid noise.
NOTE
The vapor barrier is the single most important requirement for maintaining environmental
control in the conditioned area.
NOTE
Temperature and humidity sensors are located in the wall box. Proper and efficient cooling
requires placing the wall box where discharge air does not directly blow on the sensors.