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6 .15 Controller overview

The pressurisation unit controller is designed to be intuitive to use and allows

functions and alarms to be set by the installer/user . It also allows faults to be

monitored and logged to enable easier system fault diagnosis .

The functions are set using the 4 buttons (A, B, C & D) on the front of the

controller and with the help of on screen prompts via the back lit LCD display .

On the front of the APU a green 'power on' light will be displayed whilst the

unit is powered . If an alarm or error is raised the red 'Error' light will be

displayed .

A number of pressure set points can be set using the menus, these set points are

detailed below, 1 to 4 and in the description of the function .

HIGH ALARM SET VALUE (1)

SYSTEM PRESSURE SET VALUE (2)

DIFFERENTIAL SET VALUE (3)

LOW ALARM SET VALUE (4)

Fig. 20

SYSTEM FILL MODE

Fig. 21

Button A Scrolls up through menus or increases set values .

Button B Enters menus or selects values .

Button C Scrolls down through menus or reduces set values .

Button D Returns to previous menu

PUMP 'OFF'

PUMP 'ON'

TIME

NORMAL OPERATION

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6 .16 Function list & explanation

The functions are contained within an initial display and 3 menus:-

Setting menu (pass code protected) see Section 6 .18 .

Advanced setting menu (pass code protected) see Section 6 .19 .

Test menu (pass code protected) see Section 6 .20 .

6 .17 Initial display

On start up, and during operation, if the APU has had no button inputs for

1 minute, a home screen (see Section 7 .11) will be displayed with system

pressure, tank water level, any active alarm and any pump that is operating at

the time . By using buttons A & C to scroll up or down the following screens will be

displayed:-

System pressure

Active errors

System fill status

Pump activity

Pump run time

Alarm reset

6 .18 Setting menu

(Pass code protected, if set)

The following functions can be set and modified:-

Sets the required system pressure.

System pressure (2)

to the maximum set value for the pressurisation unit model - Midi 130

see Fig . 20

& 230 - 3 .5 bar max; Midi 150 & 250 - 4 .1 bar max .

Sets the pressure at which the pressurisation unit will turn

Differential pressure (3)

on at as the system pressure falls. Relative to the system

see Fig . 20

pressure.

cannot be set above 0 .1 bar below the System pressure (2) .

Sets high system pressure alarm.

Hi Alarm (1)

above the System pressure (2) . Cannot be set below System pressure

see Fig . 20

+ 00 .5 bar . Alarm auto resets when system pressure is reduced below

alarm level .

Sets low system pressure alarm.

Lo Alarm (4)

below the System pressure (2) - Differential pressure (3) - 0 . 0 5 bar .

see Fig . 20

Alarm auto resets when system pressure is increased above alarm

level

Turns on system fill option

the System pressure (2) has been reached or a period of 24 hours has

System fill

passed since it was set to 'on' . Lo alarm and Max runtime functions

are disabled whilst System fill is turned on . Pumps will stop if the

System pressure (2) or Hi alarm pressure (1) is reached .

Alarm triggered if the APU starts more than the preset

Start Activity High

limit in 24 Hours.

Set to minimum of 100 starts per 24 hrs . Set in increments of 100 .

Set in 0 .1 bar increments up

Set in 0 . 0 5 bar increments below the System pressure (2),

Set in 0 . 0 5 bar increments

. System fill option will turn off once

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