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NG-IOM-ATT Release 1.2
July 12, 2019
Chapter 3 Mechanical Installation
3.1 Control Enclosure
The NextGen CoolLinks™ enclosure can be mounted directly on the wall in any suitable location on the inside of the
shelter; the enclosure does not have to be mounted on the same wall as the DAC/WAC or HVAC units. However, there
are some physical constraints that should first be considered prior to mounting:
•
DAC/WAC Unit: one, 50ft. Ethernet cable is provided for connection to the DAC/WAC unit. The enclosure
should be mounted to ensure that the distance from the electrical box inside each DAC/WAC unit to the
enclosure does not exceed 50ft. including all necessary conduit routing.
•
Inside Sensor: one, 40ft. communications cable is provided for connection to the inside sensor. The
distance between the enclosure and the sensor should not exceed the length of the communications
cable, which must also be run in conduit.
•
The two-line LCD message display provides the local interface to the system and should be installed at a
height where a technician can comfortably see the system while standing in front of the enclosure.
Ideally this would be at a height of 5ft. from the floor.
•
The enclosure has a depth of just over 5 inches. It is important to ensure that the enclosure does not
extend into a walkway and does not impede access to other shelter equipment.
The enclosure is mounted to the shelter wall with four brackets attached the back of the enclosure. At a minimum,
screws should be 1
¼
” x
¼
” wall anchors and must be installed in each hole to fully support the 20lbs weight of the
enclosure. If necessary, washers may be installed behind the heads of the screws. All cables or wires entering or leaving
the control enclosure should be installed in either fixed or flexible conduit. For this purpose two conduit knockouts are
provided on the top and one conduit knockout each on the bottom and sides of the enclosure.
3.2 Inside Temperature & Humidity Sensor
The inside temperature sensor measures the internal shelter temperature which in turn is used to operate the cooling and
heating functions of the controller. The sensor mounts on a standard 4” x 2” Handy box and can be installed anywhere
within 40ft. of the controller (including conduit routing). The ideal location is on the wall adjacent to the exhaust damper,
provided that this location is not behind any equipment or a grounding bar. The sensor requires a nominal flow of air
over the sensor element but should not be placed directly in front of the supply air vents or adjacent to the shelter entry
door. The sensor should also not be installed behind equipment racks or close to local heat sources such as rectifiers,
radio cabinets, or battery chargers.
