Danfoss VLT HVAC Basic Drive FC 101 Specifications download pdf (Page 23)

2.6.18 Condenser Pumps

Condenser water pumps are primarily used to circulate

water through the condenser section of water cooled

chillers and their associated cooling tower. The condenser

water absorbs the heat from the chiller's condenser section

and releases it into the atmosphere in the cooling tower.

These systems are used to provide the most efficient

means of creating chilled water, they are as much as 20%

more efficient than air cooled chillers.

2.6.19 The VLT Solution

Frequency converters can be added to condenser water

pumps instead of balancing the pumps with a throttling

valve or trimming the pump impeller.

Using a frequency converter instead of a throttling valve

simply saves the energy that would have been absorbed

by the valve. This can amount to savings of 15-20% or

more. Trimming the pump impeller is irreversible, thus if

the conditions change and higher flow is required the

impeller must be replaced.

Frequency

converter

Water

Inlet

Water

Outlet

BASIN

Flow or pressure sensor

Condenser

Water pump

Throttling

valve

Supply

CHILLER

130BB452.10

Illustration 2.14 Condenser Pumps

Product Overview

VLT

HVAC Basic Drive FC 101 Design Guide

MG18C502 - Rev. 2013-09-06 21

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Danfoss VLT HVAC Basic Drive FC 101 Specifications Page 23