APC INROOM ACPSC3000 Provozní pokyny stáhnout pdf (Strana 71)

71InRoom Controller - Operating Instructions

∧

∨

∧

∨

∧

Gen. setting

Control/Parameter (Part 3)

Cooling priority

The cooling priority determines the overriding cooling

circuit for units with two different cooling systems. The

parameters 0, 1, and 2 can be adjusted.

0 - no priority, this is the adjustment for GE-systems,

where a mixed operation of both systems is possib

le.

1 - CW- means that chilled water cooling has priority at

ACW/GCW-units.

2 - DX- means that compressor cooling has priority at

ACW/GCW-units.

Malfunction change-over

CW –> DX

Malfunction change-over

DX –> CW

The diagram below displays the conditions for a mal

function change-over at Dual-Fluid-units (units with two

different cooling systems).

WT > TGEoff

cooling priority = 1 CW-off = 1

CW-off = 0

cooling priority = 2

LP-alarm 1

compressor-

failure 1*

*HP-alarm or com-

pressor failure

LP-alarm 2

compressor-

failure 2*

∧ - logic operation AND

∨ - logic operation OR

WT - water temperature 1

TGEoff - upper water temperature limit for GE-operation

CW-off - digital input (pre-set DIN16) to enable DX-opera-

tion or to disable CW-operation(see page 80)

For a better understanding:

The OR-operations are horizontally located.

The AND-operations are vertically located.

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