Nimbus Cloud Chamber

Nimbus Cloud Chamber

The Conley Cloud Chambers

Conley has over thirty years developing solutions for the IT Infrastructure industry performed extensive research developing the Conley Cloud Chambers. All aspects: structural strength and construction, size and capacity, airflow, cooling, power, fire suppression, connectivity, security, monitoring and control, universal mounting and mobility have been explored. The cloud chambers’ integrates the preeminent features of each aspect, that when combined, delivers a data center environment virtually anywhere: wire closets and telecom rooms, office environment, warehouses, shipboard, on a utility pole, cell tower, in a field or on the side of a wall.

 Class A1* Data Centers

The American Society of Heating and Air – Conditioning Engineers (ASHRAE) Technical Committee 9.9 sets the standards for Mission Critical Facilities, Technology Spaces and Electronic Equipment. These standards are divided into classes. The top rated class is A1.

 “The Class A1 standard is: A data center with tightly controlled environmental parameters (dew point, temperature, and relative humidity) and mission critical operations; types of products typically designed for this environment are enterprise servers and storage products”.                                   


Structure and Strength:

All chambers are constructed of 14 gauge cold rolled steel, welded construction and textured powder painted. The chambers meet the NEMA 4 specifications:

 “Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and windblown dust); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain, sleet, snow, splashing water, and hose directed water); and that will be undamaged by the external formation of ice on the enclosure. “

The air conditioners are available in NEMA 4,  4X and 12 configurations.

“Type 12 Enclosures constructed (without knockouts) for indoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and circulating dust, lint, fibers, and flyings); and to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (dripping and light splashing).”

                                National Electrical Manufacturers Association

Sizing the Chamber

The size and capacity of a cloud chamber depends upon these major factors: the total amount of kWc, (the kWc stands for kilowatts of power to cool: 3.5 kWc equal 12,000 BTU or 1 ton of air-conditioning); the environment – inside or out, and the voltage that will be supplied to the air conditioner and equipment.

Matching power usage to cooling is capacity is critical – too little, the equipment is effected too much and the air conditioner short cycles: becoming extremely inefficient.
That is why the Conley Cloud Chambers have been designed to accept multiple sizes of air conditioners: 10 – NEMA 12, 9 – NEMA 4, and 9 – NEMA 4/4X models. The Chambers air conditioners are designed to be field upgrade able  When the power needs changes – so can the cooling. The rail systems, within the chambers, are constructed to SSI standards for 19” rack mount specifications. The Nimbus unit has 36U’s of usable racking while the Cumulus delivers 42U’s.


The Conley chambers have a specially designed airflow system. This system incorporates the best practices stated by the Uptime Institute for data center airflow. The cold air is delivered to the front of the equipment by a strategically placed plenum, streams through the equipment and the hot air exits the chamber by another separate air duct.

When used with blanking panels this arrangement provides highly efficient cooling while stopping the re-circulation of the heated air. A thermal sensor located in the front of the chamber monitor the inlet temperature. Programmable set point provides the temperature range and sends alarms and alerts via IP and/or emails when the ranges are exceeded.

This produces three major benefits: the elimination of hot spots, the equipment receives the maximum amount of cooling and increases the efficiency of the air conditioner.

 Air Conditioners

Air Conditioners

Air Conditioners

The air conditioners are available with a NEMA 4, 4/X and12 rating. When placing the Cloud Chambers outdoors it is strongly recommended that the air conditioner carries a NEMA 4 or 4X rating. For indoor use a NEMA 12 will be sufficient.

The air conditioners features include:

  • A filter free design – reduces the maintenance and filter supplies
  • Rugged, long lasting backward curve impeller fans providing twice the lifespan as conventional fans
  • Proper long internal air flow path that increase the efficiency of the unit
  • Hermetically sealed refrigeration circuit that eliminates the use of Schrader valves (the leak source on many other A/c model units)
  • Control board that manages the temperature preventing airflow short cycling
  •  Active condensation evaporation system making drainage lines unnecessary
  •  Automatic turn off control when chamber is open; this prevents condensation within the chamber
  •  Optional 900 watt heater is available


A true redundant power scenario is a prerequisite for a Class 1A rating. The Conley Cloud Chambers delivers that requirement. Each unit has it’s own power distribution system.

A load center box, mounted on the outside of the unit, accepts a maximum 125 Amp feed. This power is dedicated for powering the systems and controllers of the chambers. A stand alone junction box located below the load center is where the air conditioner is connected to a separate feed. This prevents electrical interference that may be caused by the compressor’s motor.

The Chamber has it own power distribution system. For chambers with the power requirements of 2.2 kW to 3.5 kW the layout consist of a 4 breaker distribution panel that accepts a 100 Amp feed.

The panel supplies power to two-120V 30 Amps or two-230V 30 Amps – depending on the required power, they are located in the rear of the unit. The two 30A receptacles are designated for the redundancy power of the equipment. There are also two 120V 20 Amp receptacles; one 20 Amp receptacle is for the tech service equipment. This receptacle is also located in the rear of the chamber. The three rear receptacles are monitored for status at the breaker level.  The remaining 20A circuit is reserved for the controller(s) of the chamber and is located in the front of the unit. All the receptacles have isolated grounds.

All models of the air conditioners are hardwired. There is a junction box, located below the distribution panel, for connecting to the building feed. This separation ensures that distortion created from the air conditioner compressor motor doesn’t affect the power to the equipment.

For chambers with power requirements of 4 kW to 7 kW the receptacles are replaced with junction boxes designed for hardwiring the required UPS’s. These feeds are monitored, for status at the breaker level.

All high voltage wiring in the cloud chambers are routed through conduit and all of the receptacles have isolated grounds. The chamber and doors have grounding studs.

If a different power scenario is needed the unit can be wired to accommodated it.

To complete the installation an EPO switch should be installed in the room bridging the buildings power and the UPS’s

  Fire Suppression:

Fire Suppression

Fire Suppression

The fire suppression agent is potassium based and  provide fifteen (15) minute time weighted average data from an independent United States laboratory demonstrating that the aerosol does not produce (at normal design concentrations) harmful levels of CO, CO2, and NOx based on NIOSH standards. Agent has no ozone depletion potential and no global warming potential. The agent is approved for commercial sale by the US EPA and listed/approved by CSIRO/ActivFire, ECB, MCA, and ABS.

The suppression container has a thermal actuator that has the capability to be set at 70°C (158°F), 95°C (203°F), or 123°C (253°F). The actuator has been tested to UL 33. Electrical release systems and/or VESDA fire sensors are available


Cabtite Cable Glands

Cabtite Cable Glands

Network cable enters the chamber through five set of cable glands. The glands are configurable to the type of cables entering the unit. The five glands will allow a total of 200 cat 5 cables, 190 cat 6E cables. The maximum size cable bundle per opening is 1 ¼” diameter. The glands will take a total of 10 bundles. Optional cable patch boards can be installed in place of the cable gland if desired.

  Security, Monitoring and Control:

Chamber's  Controller

Chamber’s Controller

The Chamber’s Controller controls all internal functions of the chamber: fire sensor, breaker status, air-conditioner control and fault alerts, LED lights, temperature sensors, external status lights, data logging and alerts via IP. The controller can be access via a standard web browser and the dashboard can be customized to the user needs  The level of the security of the Chambers depends on what is required. The standard configuration is a key lock swing handle. When the door(s) are open the  controller turns off the air-conditioner, this prevents condensation developing on the equipment, LED lights turn on and the entry time is logged. When the door is closed, the lights turn off and the time is also logged. The controller can be programmed to send out alerts whenever the chamber doors are open.

To comply with the Department of Energy CIP – 006-03c standards an optional HID Card reader with electrical handle and a mechanical over-ride feature is available. It is designed to integrate with a building security system or use a secure cloud service for access control and logging of entries. With this option the Conley Controllers still handles all internal chamber functions.The Conley’s Cloud Chamber line is designed to address the need of placing the network where it is needed within the same environment that is found in the data center. If you have a special requirements that our standard line can not fulfill please contact us. We have the capability to provide a custom solution at a reasonable price.



Comments are closed.