Grundfos control lc 221 инструкция

Бренд: Grundfos

Категория для инструкций: Автоматика, регуляторы, модули, термостаты

Алфавит (англ.): G

Описание: Шкаф управления канализационными насосами GRUNDFOS LC 221. Паспорт, Руководство по монтажу и эксплуатации

Размер файла: 1128841 байт

Инструкция на шкаф управления канализационными насосами GRUNDFOS LC 221

Бренд	Grundfos
Тип	управления
Серия	LC 221

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Варианты товара

Цена за шт

Описание и фото товара, технические характеристики, информация о комплекте поставки, габаритах, внешнем виде и цвете, стране производства, а также сертификаты и паспорта носят справочный характер и основываются на последних доступных сведениях от производителя. Производитель оставляет за собой право изменить параметры без предварительного уведомления продавца. Предложение не является публичной офертой.

страница создана за 0.3137 с:
генерация данных 0.2169 c,
генерация шаблонов 0.0967 с (запросы в бд 0.1655 с + разбор 0.0078 c, fetch: 0.0047 c )(всего запросов 180) (память 2 Мб)

5.1.5 Non-return valve

The DN 80 non-return valve includes a drain screw to lift up the

internal flap in order to drain the discharge pipe in case of

maintenance or service. The valve is designed and tested

according to EN12050-4. See fig. 5.

Loosen the lock nut a little before turning the drain

Note

screw.

Fig. 5

Butterfly (double) non-return valve, DN 80

5.1.6 Level sensor

The piezoresistive pressure sensor placed in the controller is

connected via a hose to a pressure tube in the tank. The screw

cap where the hose is connected includes a connection for a DN

100 tube. This tube, the pressure tube, extends down into the

tank. The rising liquid level compresses the air inside the

pressure tube and hose, and the piezoresistive sensor transforms

the changing pressure into an analogue signal. The control box

uses the analogue signal to start and stop the pump and to

indicate high water-level alarm. The pressure tube is fixed

underneath the screw cap and can be taken out for maintenance,

service and for cleaning the inside of the tube. An O-ring ensures

tightness.

The hose is supplied in lengths of 4 or 10 m. The hose must be

connected to the controller.

Fig. 6

Screw cap with hose, DN 100 tube

6

The LC 221 is a level controller specially designed for controlling

and monitoring the Grundfos lifting stations, Multilift MD and

MLD. The basis for the control is the signal received continuously

from the piezoresistive, analogue level sensor.

The level controller switches the MD and MLD Multilift pumps on

and off according to the liquid level measured by the level sensor.

When the first start level is reached, the first pump will start, and

when the liquid level has been lowered to the stop level, the pump

will be stopped by the controller. If the liquid level rises up to the

second start level, the second pump will also start, and when the

liquid level has been lowered to the stop level, the pumps will be

stopped by the controller.

Starts alternate between the two pumps.

In case of pump failure in one pump, the other pump will take

over (automatic pump changeover).

An alarm will be indicated in case of high water-level in the tank,

pump failure, etc.

Furthermore, the level controller has many more functions as

described below.

Fig. 7

LC 221 level controller for Multilift MD and MLD

The LC 221 controller has the following functions:

•

on/off control of two wastewater pumps based on a continuous

signal from a piezoresistive level sensor with alternating

operation and automatic changeover in case of pump failure

•

motor protection with motor-protective circuit breaker and/or

current measurement as well as connection of thermal

switches

•

motor protection via operating-time limitation with subsequent

emergency operation. Normal operating times are max.

25 seconds (MD) and 55 seconds (MLD), and the operating

time is limited to three minutes (see section

fault

indications, fault code F011).

•

automatic test runs (2 seconds) during long periods of

inactivity (24 hours after last operation)

•

re-starting delay up to 45 seconds after returning from power

cut-off to mains operation (in order to even out the mains load

when several appliances are started up at the same time)

6.4 Description of