Room Preparation; Location Considerations - Liebert Mini-Mate2 MMD24E User Manual

5.1.2

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.
NOTE
The single most important requirement for maintaining environmental control in the
conditioned room is the vapor barrier.
Outside or fresh air should be kept to a minimum when tight temperature and humidity control is
required. Outside air adds to the cooling, heating, dehumidifying and humidifying loads of the site.
Doors should be properly sealed to minimize leaks and should not contain ventilation grilles.
5.1.3

Location Considerations

CAUTION
!
Risk of leaking water/glycol. Can cause building and equipment damage.
Do not mount units over equipment and furniture that can be damaged by leaking
water/glycol. Install a watertight drain pan with a drain connection under the cooling unit
and water/glycol condenser unit. Route the drain to a frequently used maintenance sink so
that running water can be observed and reported in a timely manner. Post a sign to alert
people to report water flowing from the secondary drain pan.
NOTE
Do not mount units in areas where normal unit operating sound may disturb the working
environment.
Install the evaporator unit over an unobstructed floor space if possible. This will allow easy access for
routine maintenance or service. Do not attach additional devices (such as smoke detectors, etc.) to the
housing, as they could interfere with the maintenance or service.
NOTE
Temperature and humidity sensors are in the wall box. Install the wall box where discharge
air DOES NOT blow directly on the sensors.
When using the optional air distribution plenum, avoid locating the evaporator unit in confined areas
that affect the air flow pattern. Such locations could cause short cycles, downdrafts and air noise.
Avoid locating the unit in an alcove or at the extreme end of a long, narrow room. Avoid installing
multiple units close to each other. This could result in crossing air patterns, uneven loads and
competing operating modes.
When installing an air-cooled or water/glycol-cooled unit inside a space, ensure that national and
local codes are met for refrigerant concentration limits that might vary with building type and use.
® ™
Liebert Mini-Mate2 14
Site Preparation and Installation