Daikin EWTP400MBYN — функциональное описание цифрового контроллера для больших охладителей [321/452]

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ESIE 05-07 The Digital Controller For Large chillers

Part 2 – Functional Description 2–125

Screen 7 This screens allows to set the pump lead and lag times. It is also in this screen that the "pump daily

on" function can be activated.

The user will get the choice to perform a pump start every day to prevent obstruction of the pump and

to increase the lifetime of the pump. Every day at pump start time, which can be chosen, the pump will

be started automatically for a short time period (5s) when the unit is not on.

Remark: The default value for the PUMPLAGTIME is 0 sec, but it is recommend setting the lag time

to 120s. This is to prevent the evaporator from freezing up when there is no flow.

For more info about this function refer to the corresponding chapter.

Screen 8 This screen allows you to enable or disable the schedule timer and the holiday period timer.

This screen is only visible if the unit is operating as a standalone unit or if the unit is the master in a

DICN setup.

Remark: New screens will be available if one or both timer possibilities are set to Yes.

For more info and all the sceens about these schedule and holiday timers refer to the

schedule timer managment chapter on page 2–56.

Line n° Display Description Default

Lower

limit

Upper

limit

1 PUMPCONTROL screen title

2 PUMPLEAD-

TIME

Time to run the water pump

before starting up the chiller

020 sec 020 sec 180 sec

3 PUMPLAGTIME Time to keep the pump on, after

stopping the chiller

000 sec 000 sec 180 sec

4.1 DAILY ON To activate a daily pump start up N N Y

4.2 AT Pump start time 12h00 00h00 24h00

Line n° Display Description

Possible

settings

1 SCHEDULE TIMER screen title

2 ENABLE TIMER To enable the programmable schedule timer N/Y

3 ENABLE HOLIDAY

PER

To enable the programmable holiday period timer N/Y

ESIE05-07.book Page 125 Wednesday, October 11, 2006 10:42 AM