Notes For Open Circuit Applications; Notes For Closed Circuit Applications; Chilled Water Connections Chilled Water (C) Units - (Fig. K) - Emerson Liebert CRV User Manual

5.3.1

Notes for open circuit applications

S Use the unit with mains or well water.
DO NOT USE WATER FROM AN EVAPORATIVE COOLING TOWER UNLESS THE
FILLING WATER HARDNESS IS CONTROLLED.
S The water pressure must be 2 - 10 bar (if this is not so, contact the Technical Support Depart-
ment).
S The required water flow at different temperatures is given in our catalogues or on request.
S If necessary (very low water temperature) insulate both pipes using Armaflex insulation.
5.3.2

Notes for closed circuit applications

The installation in Fig. f is indicative only; for individual installations follow the project diagram.
S Install a pump system calculated on the basis of the flow and total head of the system (see project data),
and controlled by the compressor running (see label on the unit).
S Insulate both pipes using Armaflex insulation.
S VERY IMPORTANT: Add water and ethylene glycol to the circuit, when the ambient temper-
ature is below zero (referring also to para. 5.5). Do not exceed the nominal operating pressure
of the circuit components.
S Bleed air out of the circuit.
5.4

Chilled water connections Chilled water (C) units - (Fig. k)

Top chilled water connections
S Use copper or steel (Mannesmann) tubing.
S Place the tubing on supporting saddles (1).
S Insulate both tubes using Armaflex insulation (2).
S Place shut-off ball valves (3) at the conditioner inlet and outlet to allow easy maintenance.
S It is useful to install a thermometer (4) and a manometer (5) at the conditioner inlet and outlet.
S Install a water drain tap (6) at the lowest point in the circuit.
S Fill the circuit with water/glycol (see Fig. k).
Fig. k - Chilled water circuit
2
1 6
Air
conditioner
4 5
3
Rear bottom chilled water connections
27
Water Connections