Page 12: Figure 1 liebert icom components, Peration, With, Com c, Ontrol, Features, Liebert icom components
Liebert vNSA Network Switch for Liebert iCOM Controls. Connects multiple cooling units equipped with Liebert iCOM unit controls, allowing them to communicate and function as a team, and also supports lead/lag operation. Liebert vNSA Quick Installation Guide SL-18838 NA; Warranties. Limited 13 Month Warranty for Monitoring Products. 1 LIEBERT VNSA Installation Sheet Description The Liebert vnsa network switch is designed for connecting multiple Ethernet-ready devices and comes in various models. The unit may have: A Liebert icom display mounted on the front, as shown at right. Download Liebert technical manuals from our knowledge center. Manuals on Liebert NX models are available with us. Get a quote within 24 hours! GET YOUR QUOTE. Liebert® iCOM® User Manual -Intelligent Communications & Monitoring for Liebert Challenger 3000™, Liebert CW™ and Liebert DS™ with Software Version PA2.01.48R.
Operation with iCOM Control
6
Instruction Manual
3.0
O
PERATION
WITH
I
COM C
ONTROL
The Liebert iCOM
™
control offers the highest capabilities in unit control, communication and moni-
toring of Liebert mission-critical cooling units.
Liebert iCOM may be used to combine multiple cooling units into a team that operates as a single
entity, enhancing the already-high performance and efficiency of Liebert’s units.
3.1
Features
Large and Small Displays
The Liebert iCOM control is available with either a large or small liquid crystal display.
• The Liebert iCOM with small display has a 128 x 64 dot matrix screen that shows text and
icons. This display is capable of controlling only the unit it is directly connected to.
• The Liebert iCOM with large display has a 320 x 240 dot matrix screen that shows text and
icons of 32 connected units (see Figure 4). This display can be used to control a single cooling unit
or any cooling unit within a connected group over a network.
Liebert Vnsa User Manual Sl-18840 Instructions
Liebert iCOM’s menu-driven display is used for all programming functions. The Status menu shows
the temperature of the return or supply air and the and humidity of the return air.
Figure 1
Liebert iCOM components
Wall Mount Large Display
Unit Panel Mount
Small Display and Bezel
Liebert Vnsa User Manual Sl-18840 System
Unit Panel Mount Large Display
and Bezel
Liebert iCOM Input/Output Board
Liebert vNSA Network Switch
Figure 15 Digital scroll capacity modulation, 10-100% variable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 16 Single and dual digital scroll compressor activation points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 17 Three-point actuator control (example: cooling) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 18 Second cooling source and compressorized cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 19 Three-stage heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 20 Two single-step compressors with SCR reheat set to Tight mode . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 21 Two single-step compressors with SCR reheat set to Standard mode. . . . . . . . . . . . . . . . . . . . . . 26
Figure 22 Humidity proportional band. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 23 Teamwork Mode 1 with two cooling units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 24 Connecting two cooling units, each with a small display using a crossover Ethernet cable . . . . 44
Figure 25 Wiring a small display for stand-alone operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 26 Wiring a small display for U2U network operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 27 Wiring a large display for stand-alone operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 28 Wiring a large display for U2U network operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 29 Liebert iCOM input-output control board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Figure 30 Liebert vNSA with optional remote large display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 31 Liebert iCOM display dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50