Chiltrix AC series Heating & Cooling series CX30, Инструкция по установке и эксплуатации

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Chiltrix Inc. www.Chiltrix.com
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G2 Valve Wiring “Free Cooling “ CX30SE Model
Main CX30 Free Cooling Unit
G2 Valve and C5 cooling water pump are preinstalled in the CX30SE. To enable the free cooling function
dipswitch SW1-5 must be set to ON. The main CX30 C5 port is connected to the Free Cooling Units C5 port,
the CX30 G2 is connected to the FCU 3-way valve G2 port. Parameters P29 and P31 have a factory default
of 5°C, differential = 2°C. P29 must be changed to 3°C, and P31 must remain 5°C. The unit will operate as
follows: When outdoor temperatures drop below 38F, the CX30SE glycol-water loop is automatically
extended through the water-to-air heat exchanger to harvest outdoor cold ambient conditions to pre-cool
the glycol-water loop so that the CX30 variable speed compressor can drop to a very slow speed and
consume less power. At and below 28F, the CX30SE server room chiller will turn off the compressor
entirely and still be able to maintain its rated cooling capacity using only the variable speed pump and fan
motors.