High-country-tek HFS-2Q Manual de usuario descargar pdf (Pagina 8)

Hydraulic Fan System Controller : HFS - 2

Thermistor Requirements:

The controller operation is based on input from up to three temperature measured

zones.

One, two or all three inputs can be used depending on the system requirements with

all three thermistor inputs able to be enabled or disabled independently within the

set-up software.

Two wire NTC thermistors sensors with both wires brought back to the unit are

required for each zone being monitored.

DO NOT use

hermistors with one lead grounded as

he sensor and

he measuring

The inputs can be from NTC ( Negative Temperature Coefficient ) Thermistors or Bi-

Metallic temperature switches and the choice can be made in the set-up software.

accuracy will be severely degraded !

The controller is compatible with most automotive type thermistors with Borg

Warner, Delphi and Ford IAT sensors being pre-configured and selectable on a drop

down menu.

Other transducers not pre-set may have their profiles added and stored under user

selectable names for future use b

HCT factor

ersonnel.

Ifotherthermistorsaretobeadded,theacceptableOhmicrangeis50ohmsatthe

maximum temperature that can occur in the system to 2Mohm at the minimum

temperature that can occur in the system.

Open(>2Mohm)orshorted(<50ohms)thermistorinputswillbedetectedand

cause full fan speed output and indicate with the appropriate alarm response and

error

code

aide

diagnosis

the

problem

error

code

aide

diagnosis

the

problem

Each thermistor input can also be configured and used as simple contact closure

switch inputs.

Fan ‘ON’ Delay:

The fan ‘ON’ delay feature is intended to hold the fan at no rotation to avoid unnecessary windage forces and

allow the ( hot ) engine to start with minimum loading possible.

This ‘Start Up Delay ‘ is programmable by the user via the software set-up program and can be set from zero (0) to

sixty ( 60 ) seconds in one second increments.

This delay is activated every time the main power supply input is removed and re-applied to the controller.

In the case of a normally acting proportional valve, the current is held at zero output for the delay time.

If a reverse acting valve is used, the output current is held at the maximum set in the software to ensure the fan is

fully OFF.

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High-country-tek HFS-2Q Manual de usuario Pagina 8

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