Airedale OnRak 3kW 35kW - Manual (Page 10)

LogiCool
™ OnRak
Active Cabinet Exhaust
IT Cooling
10
IT Cooling
Technical, Installation and Maintenance Manual :6912497 V1.5.0 02_2013
Lon BMS Connection The Airedale controllers, using special serial cards, shall be integrated into LonWorks®
networks. The RS485 and the FTT10 standards shall be supported by the LonWorks®
serial cards.
The two types of LonWorks® serial cards shall differ by the type of interface on the
LonWorks® network side:-
FTT-10A 78 kbs (TP/FT-10)
RS485 39 kbs (TP/485-39)
pCOWeb pCOWeb is a new generation of Airedale supervisory plug-in cards which make
communicating with an Airedale unit simply a matter of logging onto the office Intranet or
via the web.
Based on Ethernet TCP/IP secure technology, pCOWeb shall require no proprietary
cabling. It shall have little or no set-up on site and can be pre-programmed with an IP
address prior to dispatch from airedale.
BacNet Protocol The BACnet protocol option shall be supplied either with a pCOWeb (Ethernet) or
pCONet (RS485) interface card.
Programming Smart Key A smart key shall be supplied to offer software back-up of the control strategy. The key
shall feature simple plug in operation and allow transfer of software programs from the
key to the microprocessor and vice versa. The use of a service laptop shall not be
necessary.
Water Pipework
Connections Various water side connections shall be available. 1” BSP (British Standard Pipe) and
1 “self seal fittings, with 1” BSP connections.
Flexible Connections Stainless steel flexible connections shall be supplied with the unit. They shall be
supplied either 1.5m or 3m long. Longer lengths can be provided. Please contact
Airedale.
Isolating Solenoid Valves Isolating solenoid valves shall be fitted to the inlet and outlet connections. This shall
control the water flow to and from the cooling module in the event of fault or power
failure. The valves have a low pressure drop and are fast acting. The valves shall be
Normally Closed (NC) operation and are supplied loose.
Rack Pressure Management The OnRak shall be fitted with rack pressure management, which allows the differential
pressure across the IT equipment to be monitored and controlled to achieve:

Positive air pressure at the server inlet.

Negative air pressure in the rear of the cabinet at the server outlet, to prevent
backwash of hot air (behind OnRak coil guard).
 Controlled differential pressure across the IT hardware so that air is not ‘forced’
through the IT equipment.
Room Mounted
Temperature and Humidity
Sensor A room mounted temperature and humidity sensor shall be supplied loose for onsite
fitment.