Connection diagram for pressure switch rm 5 3w. Correct connection of the water pressure switch to the submersible water intake pump. Connecting the pump to the network

18.10.2019

The pressure switch PM/5-3W is made in Italy. It is used to create automatic water supply systems both in the private sector and small industrial enterprises. It has excellent performance characteristics and a number of innovations that allow this device to be successfully used to control the water pressure in the system.

Peculiarities
- Applicable for single-phase pumps.
- Long service life
- Durable plastic body
- Built-in pressure gauge
- The presence of three 1 inch outlets allows you to connect a pump, a hydraulic accumulator and a water outlet.

Specifications

Mains voltage - 230 V, 50 Hz.
Maximum power - 1500 watts.
The maximum switched current is 12A.
The maximum working pressure is 5 bar.
Switching pressure regulation range – 1 - 2.5 bar.
Cut-off pressure regulation range –1.8 - 4.5 bar.
Hydraulic connection - 1" male x 1" female x 1" female.

Wiring diagram

This pressure switch is in great demand due to its high quality and good design - the ability to connect three fittings and the presence of a pressure gauge. The maximum effect of the device is achieved in the presence of a hydraulic accumulator. Which avoids sudden pressure drops.
Recommended to use to create automatic system water supply at home or cottage.

How to buy pressure switch PM/5-3W

You can buy a pressure switch by making a purchase directly on the website of the online store, or by calling by phone in the Contacts section. Our manager will contact you and arrange delivery or reserve the goods for pickup.

If you need a pressure switch in Moscow, we offer delivery within the city and the nearest suburbs. For buyers from other regions of Russia - delivery by any transport company or postal service as agreed.

Payment for goods is carried out in the following ways:

1. Payment in cash.

When picking up from the store, or upon receipt of the goods by the courier.

2.Bank transfer - payment according to the invoice for payment as for legal, and for physical persons.

When placing an order, select the payment method: "Bank Transfer".

After confirming the order, our specialist will contact you and after agreeing on all organizational issues, you will be sent an invoice by e-mail which you can pay in any bank or through an internet client.

1. Pickup.

Pickup times and times:

PVZ m. Sokol: you can pick up the order the next day after the order from 10 to 18 on weekdays. The order is stored at the point of issue for 3 working days.

Pickup cost:free of charge when ordering from 1,000 rubles. (when ordering less than 1,000 rubles - pickup cost - 80 rubles)

Attention! In the point of issue of orders are only pre-reserved goods!

The employee of the point of issue does not give any advice on the goods!

The route map to the pickup point is located on the page CONTACTS

2. Delivery in Moscow within the Moscow Ring Road

The following items are delivered free of charge:

Kerosene heaters trademark"Sengoku"

Cost of delivery:

If your order weighs more than 20 kg - the manager will calculate and inform you the cost of delivery additionally!

Time of delivery:

Delivery is carried out on weekdays from 10:00 to 20:00.

Behind 30-90 minutes, the courier calls you and agrees on the exact time of arrival.

Exact delivery address (city, street, house number, apartment or office number, intercom code)

The contact person

Contact phone numbers

3. Delivery outside the Moscow Ring Road and further in the Moscow region

Cost of delivery:

If the WEIGHT is not indicated in the product card, you can check it with the manager.

If your order weighs more than 20 kg - the manager will calculate and inform you the cost of delivery additionally!

Time of delivery:

Delivery is carried out within 1-3 working days from 10:00 to 20:00 no reference to noon.

Behind 1-2 hours before delivery, the courier will call you and agree on the exact time of arrival.

What is important to specify when ordering:

Exact delivery address ( city, district, locality, street, house number, apartment or office number, intercom code)

The contact person

Contact phone numbers

4. Delivery to the regions of the Russian Federation

We can send you the goods of any of the following companies.

CDEK - www.cdek.ru

First Forwarding Company (PEC) - www.pecom.ru

The estimated cost of delivery of goods can be found on the websites of these companies or contact our specialist.

What is important to specify when ordering:

Passport series and number, date of issue

Full Name

City of receipt

If none of the above methods suits you, we will send the goods to your address in another way - as agreed with you.

You can pick up the purchased goods yourself or use the delivery service in Moscow and the Moscow region. Having placed an order today, tomorrow you will receive it at your disposal. If necessary, you can use the service of prompt delivery and receive products today.

Delivery to the entrance (check with the manager about the possibility of raising to the floor)

Delivery is made daily from 9 am to 9 pm including weekends and holidays.

Goods worth up to 6,000 rubles can be picked up by yourself.

Pickup points

For orders worth more than 6000 rubles:

Within the Moscow Ring Road - from 0 to 500 rubles, (Individual shipping cost is indicated in the product card)
Outside the Moscow Ring Road up to 10 km - 700 rubles,
Outside the Moscow Ring Road further 10 km - 700 rubles + 30 rubles for each kilometer.
In the regions, delivery by a transport company (calculated individually).

Shipping cost for

km from MKAD

700 rub.

Unloading of bulky goods is carried out by the forces and means of the customer.

Money is transferred directly to the courier upon receipt of the goods. This method is the most popular among buyers due to its simplicity and convenience of calculation.

Payment bank card courier upon receipt

Couriers have a portable bank terminal available, which allows Teplovod-Service customers to pay for goods with bank plastic cards (check with the manager about the possibility of paying with a bank card).

Payment by credit card on the site

To select payment by bank card on the "Cart" page, select the item "Payment by bank card on the site".

Payment is made through PJSC SBERBANK using Bank cards of the following payment systems:

After clicking on the "ONLINE PAYMENT" button, you will be redirected to the payment gateway of Sberbank of Russia OJSC to enter your card details.

Please prepare your plastic card in advance. Additionally, you need to enter the full name, email, contact phone number, as well as the reservation number to identify the payer. The connection with the payment gateway and the transfer of information is carried out in a secure mode using the SSL encryption protocol.

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This site supports 256-bit encryption. Privacy Reported personal information provided by OJSC "Sberbank of Russia". The entered information will not be provided to third parties, except as provided by the legislation of the Russian Federation. Payments by bank cards are carried out in strict accordance with the requirements of Visa Int payment systems. and MasterCard Europe Sprl.

When paying by credit card, interest is not charged.

Payment is a transfer of funds from the buyer's current account to the seller's account, we work on a common taxation system with VAT. Delivery of goods is carried out after the receipt of funds to the account of the company "Teplovod-Service". This method is used in the calculations of legal entities.

Our details

Limited Liability Company "Teplovod-Service"

OGRN: 1105003006162

TIN: 5003088884

Checkpoint: 500301001

BIC: 044525225

Bank: PJSC Sberbank of Russia

R/s: 40702810838060011732

K/s: 30101810400000000225

Jur. the address: 142718, Moscow region, Leninsky district, Bulatnikovskoe rural settlement, Varshavskoye highway, 21 km., office B-6

Special conditions

For goods with the status "On order" worth up to 100,000 rubles. no prepayment required.

For goods with the status "On order" over 100,000 rubles. a 30% deposit is required.

For any goods sent by a transport company, 100% payment is required.

More circuit diagram connection of the pressure switch and everything connected with it, we have considered.

So, as you can see from the diagram, a three-core power cable of a single-phase network is connected to the pressure switch(phase, zero and ground), and a similar cable is already coming out of the relay to the pump that pumps water into the system. There are, of course, three-phase appliances and a water pressure switch used appropriately, but in everyday life a single-phase one is usually enough.

In the water supply of a private house, single-phase surface or submersible pumps are most often used, pumping water from a well or well. The electrical power of pumps varies greatly depending on the required performance of a particular device in specific working conditions.

Usually, the power of such a household pump does not exceed 1.5-2 kW, respectively, to connect it, a cable with a core cross section of 1.5 sq. Mm is required. and 10 amp line circuit breaker.

Connecting the pressure switch to the mains is usually accepted in one of two ways., each with its own strengths and weaknesses:

1. Near the installation site of the pressure switch, on the wall, an electrical outlet is mounted for it. A cable is connected to the relay itself with electrical plug at the end.

This is a universal, most often the most convenient, connection option. The main disadvantages of this method are the need for extra costs for the outlet device itself, as well as possible problems at the junction, in the vicinity of the house's water supply system.

2. The second option is the simplest and therefore the most reliable. At the installation site of the pressure switch, a power cable is removed from the wall, with which the relay is connected to the network. In this way, maximum connection reliability is achieved, since The housing of the pressure switch, as well as the cable entry into it, are usually sealed and they reliably protect the contact point from possible adverse effects.

The main disadvantages of this method include increased requirements for the accuracy of choosing the output location and cable length, as well as some possible difficulty in subsequent maintenance. It is always easier to unplug the appliance than to disassemble and disconnect the wires.

In our installation example, the second option is chosen - the cable coming out of the wall. Maintenance problem solved by installing a separate circuit breaker for pressure switches in electrical panel boiler room.

Before connecting the power cable to the relay, make sure that there is no voltage at the installation site!

We proceed directly to connecting the pressure switch to the network, on the example of the Italtecnica TYPE PM/5G model.

Primarily remove the protective plastic cover, for this you need a straight screwdriver (slotted), unscrew the fasteners, as shown in the image below

Then in the pressure switch, a supply cable and a cable leading to the pump are laid through the cable glands.

This model uses standard sealed cable glands that are familiar to many. To fix the cable in them, you must first unscrew the plastic nut, then insert the cable first into it, and then through the input, inside the relay and finally tighten the nut until it stops.

Then, having previously prepared - having removed the protective insulation, connect the cable cores to the relay terminals pressure, according to the following diagram.

Do not pay attention that one of the connected cables in the diagram ends with an electrical plug, in our case, a power cable is connected instead, which goes continuously to the electrical panel.

After connecting the wires and control pulling all the terminals, you should get something like this:

This completes the connection, it remains only to carefully put the protective cover back on and secure.

Now, by turning on the electricity supply, you can check the operation of the water pressure switch and adjust its operation.

As you can see, there is nothing complicated in mounting the relay, especially if you clearly understand the principle of its operation.

If you still have any questions about connecting the pressure switch to the mains, for example, you have a more powerful pump or it is three-phase, or just a different model of the relay, or you don’t know how to connect and which cable and socket to use, be sure to leave them in comments to the article, I will try to answer everyone promptly.

When organizing a water supply system at home, not only a pump is needed, but also automation to ensure its operation. One of the necessary devices is a water pressure switch. This small device turns on the pump when the pressure in the system drops and turns it off when the threshold is reached. The value of the on and off parameters can be adjusted. About how this device is arranged, how to connect it and how to regulate it - in the article.

Purpose and device

In order to maintain a constant pressure in the water supply system of a private house, two devices are needed - a hydraulic accumulator and a pressure switch. Both of these devices are connected to the pump through the pipeline - the pressure switch is located in the middle between the pump and the accumulator. Most often it is located in the immediate vicinity of this tank, but some models can be installed on the pump housing (even submersible). Let's understand the purpose of these devices and how the system works.

A hydraulic accumulator is a container divided by an elastic pear or membrane into two halves. In one, air is under some pressure, in the second, water is pumped. The water pressure in the accumulator and the amount of water that can be pumped there is regulated by the amount of air pumped. The more air, the higher the pressure maintained in the system. But at the same time, less water can be pumped into the tank. Usually it is possible to pump no more than half of the volume into the container. That is, it will be possible to pump no more than 40-50 liters into a hydraulic accumulator with a volume of 100 liters.

For normal operation of household appliances, a range of 1.4 atm - 2.8 atm is required. To support such a framework, a pressure switch is required. It has two operation limits - upper and lower. Upon reaching lower limit the relay starts the pump, it pumps water into the accumulator, while pressure increases in it (and in the system). When the pressure in the system reaches the upper limit, the relay turns off the pump.

In a circuit with a hydroaccumulator, for some time water is consumed from the tank. When enough flows out so that the pressure drops to the lower threshold, the pump will turn on. That's how this system works.

Pressure switch device

This device consists of two parts - electrical and hydraulic. The electrical part is a group of contacts that closes and opens on / off the pump. The hydraulic part is a membrane that exerts pressure on the metal base and springs (large and small) with which the pump on / off pressure can be changed.

The hydraulic outlet is located on the back of the relay. It can be an outlet with an external thread or with a nut like an American. The second option is more convenient during installation - in the first case, you either need to look for an adapter with a union nut right size or twist the device itself, winding it onto the thread, and this is not always possible.

The electrical inputs are also located on the back of the case, and the terminal block itself, where the wires are connected, is hidden under the cover.

Species and varieties

There are two types of water pressure switches: mechanical and electronic. Mechanical ones are much cheaper and usually prefer them, while electronic ones are mostly brought to order.

Name	Pressure adjustment limit	Factory settings	Manufacturer/country	Device protection class	Price
RDM-5 Gileks	1- 4.6 atm	1.4 - 2.8 atm	Gilex/Russia	IP44	13-15$
Italtecnica RM/5G (m) 1/4"	1 - 5 atm	1.4 - 2.8 atm	Italy	IP44	27-30$
Italtecnica RT/12 (m)	1 - 12 atm	5 - 7 atm	Italy	IP44	27-30$
Grundfos (Condor) MDR 5-5	1.5 - 5 atm	2.8 - 4.1 atm	Germany	IP 54	55-75$
Italtecnica PM53W 1"	1.5 - 5 atm		Italy		7-11 $
Genebre 3781 1/4"	1 - 4 atm	0.4 - 2.8 atm	Spain		7-13$

The difference in prices in different stores is more than significant. Although, as usual, when buying cheap copies, there is a risk of running into a fake.

Connecting the water pressure switch

The water pressure switch for the pump is connected immediately to two systems: to electricity and plumbing. It is installed permanently, since there is no need to move the device.

Electrical part

To connect a pressure switch, a dedicated line is not required, but desirable - there are more chances that the device will work longer. A cable with a solid copper core with a cross section of at least 2.5 square meters should go from the shield. mm. It is desirable to install a bunch of automatic + RCD or difavtomat. The parameters are selected according to the current and depend more on the characteristics of the pump, since the water pressure switch consumes very little current. The circuit must have grounding - the combination of water and electricity creates a zone of increased danger.

Scheme of connecting the water pressure switch to

Cables are brought into special inputs on the back side of the case. There is a terminal block under the cover. It has three pairs of contacts:

grounding - the corresponding conductors coming from the shield and from the pump are connected;
terminals line or "line" - for connecting the phase and neutral wires from the shield;
terminals for similar wires from the pump (usually on the block located above).

The connection is standard - the conductors are stripped of insulation, inserted into the connector, tightened with a clamping bolt. Pulling on the conductor, check whether it is securely clamped. After 30-60 minutes, the bolts can be tightened, since copper - soft material and contact may be weakened.

Pipe connection

There is different ways connection of the water pressure switch to plumbing system. The most convenient option is to install a special adapter with all the required outlets - a five-pin fitting. The same system can be assembled from other fittings, just a ready-made version is always better to use.

It is screwed onto a pipe on the back of the case, a hydraulic accumulator is connected to the other outlets, a supply hose from the pump and a line that goes into the house. You can also install a mud sump and a pressure gauge.

A pressure gauge is a necessary thing - to control the pressure in the system, to monitor the settings of the relay. Mud collector is also a necessary device, but it can be installed separately on the pipeline from the pump. There, in general, a whole is desirable

With this scheme, at a high flow rate, water is supplied directly to the system - bypassing the accumulator. It begins to fill up after all the taps in the house are closed.

Water pressure switch adjustment

Consider the process of adjusting the most popular instance - RDM-5. It is produced by different factories. Adjustment limits vary, as different sizes of water pipes require different pressures. This device leaves the factory with a basic setting. Usually it is 1.4-1.5 atm - the lower threshold and 2.8-2.9 atm - the upper threshold. If some parameter does not suit you, you can reconfigure it as required. Such a procedure is usually necessary when installing a hot tub: a standard pressure of 2.5-2.9 atm is not enough for the desired effect. In most other cases, reconfiguration is not required.

The RDM-5 water pressure switch has two springs that regulate the pump off / on threshold. These springs differ in size and purpose:

large regulates the limits (immediately upper and lower);
a small one changes the delta - the gap between the upper and lower borders.

The parameters are changed when tightening or loosening the nuts on the springs. If you tighten the nuts, the pressure increases, if you loosen it, it drops. There is no need to turn the nuts strongly one turn - this is a change of about 0.6-0.8 atm, and this is usually a lot.

How to determine relay thresholds

The threshold for turning on the pump (and the lower pressure threshold on the water pressure switch) are related to the pressure in the air part of the accumulator - the minimum pressure in the system should be 0.1-0.2 atm higher. For example, if the pressure in the tank is 1.4 atm, the shutdown threshold is 1.6 atm. With these parameters, the tank membrane will last longer. But in order for the pump to work under normal conditions, look at its characteristics. It also has a lower pressure threshold. So, it should not be higher than the selected value (below or equal). Based on these three parameters, you select the switching threshold.

By the way, the pressure in the accumulator must be checked before setting - there are significant deviations from the declared parameters. Under the removable cover (in different models it looks and is located in different places) the nipple is hidden. Through it, you can connect a pressure gauge (you can use a car or the one you have) and see the actual pressure. By the way, it can be adjusted through the same nipple - increase or decrease if necessary.

The upper threshold - pump shutdown - is set automatically during adjustment. The relay in the initial state is set to some kind of pressure difference (delta). This difference is usually 1.4-1.6 atm. So if you set the inclusion, for example, to 1.6 atm, the shutdown threshold will be automatically set to 3.0-3.2 atm (depending on the relay settings). If you need more high pressure(raise water to the second floor, for example, or the system has many draw-off points), you can increase the shutdown threshold. But there are limitations:

The parameters of the relay itself. The upper limit is fixed and in household models usually does not exceed 4 atm. It just won't work anymore.
The upper limit of the pump pressure. This parameter is also fixed and the pump must be turned off at least 0.2-0.4 atm before the declared characteristic. For example, the upper pressure threshold of the pump is 3.8 atm, the shutdown threshold on the water pressure switch should not be higher than 3.6 atm. But in order for the pump to work for a long time and without overloads, it is better to make a larger difference - overloads have a too bad effect on the life.

That's all for choosing the settings of the water pressure switch. In practice, when setting up the system, you have to adjust the selected parameters in one direction or another, because you need to choose everything so that all draw-off points work normally, including household appliances. Therefore, it is often said that the parameters are chosen by the “scientific poke” method.

Setting the water pressure switch for a pump or pumping station

To set up the system, you will need a reliable pressure gauge, the readings of which can be trusted. It is connected to the system near the pressure switch.

The adjustment process consists in twisting two springs: large and small. If you need to raise or lower the lower threshold (turn on the pump), turn the nut on the large spring. If you turn it clockwise, the pressure rises, counter-clockwise - it falls. Turn by a very small value - half a turn or so.

The sequence of actions is as follows:

The system is started, the pressure gauge monitors at what pressure the pump turned on and turned off.
Press or release the large spring.
They turn on and check the parameters (at what pressure it turned on, at what pressure it turned off). Both values are shifted by the same amount.
If necessary, make adjustments (adjust the large spring again).
After the lower threshold is set as you want to see it, proceed to adjust the pump shutdown threshold. To do this, press or lower a small spring. Do not turn the nut on it too much - half a turn is usually enough.
Turn the system back on and look at the results. If everything suits, they stop there.

What else do you need to know about adjusting the water pressure switch? That not all models have the ability to change the delta, so look carefully when buying. There is a pressure switch for the pump in a moisture- and dust-proof housing. They can be placed in a pit, some models can be installed directly on the pump housing if it has such an outlet.

In some water pressure switches there is also an idle (dry) relay, in general this device is in a separate case, but there are also combined ones. Idling protection is necessary so that the pump does not break if suddenly there is no water in the well or well. Some pumps have built-in protection of this type, for others they buy and install relays separately.