Danfoss How to use solenoid valves User guide

Installation guide

How to use solenoid valves Making it easy to be eﬃcient

ia.danfoss.com

How to use

solenoid valves

This booklet has been compiled to help in the installation of compact and high performance solenoid valves and in locating faults in systems with solenoid valves.

The compact range has small physical dimensions for control of ﬂow where space is limited. The high performance range is a sturdy and universal valve program for control of ﬂow in industrial plants and within heating and sanitary systems.

Note that this booklet describes only brass solenoid valves. For other types, please contact Danfoss.

If you need help choosing a solenoid valve, visit the online valve selector at valveselector.danfoss.com

Flexible and user-friendly

Danfoss solenoid valve bodies and electrical coils are normally supplied separately and then combined together. They are assembled quickly and simply without any tools. This provides optimum product ﬂexibility and availability. If a coil needs replacement it can be done without stopping or draining any system.

The solenoid valves are also available as assembled units if required.

IC.PS.600.A8.02

Contents

Identiﬁcation .........................................................................................................3

Installation...............................................................................................................6

How to choose ..................................................................................................13

Valve overview ..................................................................................................18

Seal material .......................................................................................................22

Coils ..........................................................................................................................23

Opening and closing times .......................................................................25

Fault location ......................................................................................................27

Spare parts high performance range

......................................................

Spare parts compact range.......................................................................41

Tools .........................................................................................................................42

IC.PS.600.A8.02 | 1

Solenoid valves

Choosing the correct solenoid valve

Symbolise valves used in a closed circuit system, typically with low diﬀerential pressures.

Symbolise valves used in an open system. Used typically for drinking water. Diﬀerential pressure higher than 0.5 bar.

Symbolise valves used in a drain system.

Note ! For more details see How to choose on page 13

IC.PS.600.A8.02 | 2

Identiﬁcation

Choosing the correct solenoid valve

Illustration 1

MADE IN DENMARK

018F4517

Spare part no.

-40T40 °C

Tambient

24V 60Hz 8.5W 14VA

24V 50Hz 10.5W 16VA

Illustration 2

F4507

BQ024CS

Option 1: Identiﬁcation using silver label (← 2011)

Illustration 1 shows the label with relevant information that is attached to the coil.

The example here is from an EV220B solenoid valve: 15: 15 mm oriﬁce B: Brass body material G 12: ISO 228/1, 1/2 inch connection E: EPDM seal material NC: Normally closed

If the the coil label cannot be read, the valve can be identiﬁed from the letter/number combination stamped in the valve body.

Example:

506U4042

Week 50 2006 042U4042

The coil type (BQ024CS) is printed on the front of the coil as well as voltage (V) and frequency (Hz) - see illustration 2.

IC.PS.600.A8.02 | 3

Identiﬁcation

Option 2 (2011 →)

Printing on armature tube replaces silver labels and date / code no. stamping for identiﬁcation of the valve.

Type Designation

EV220B = Valve type 15 = 15 mm oriﬁce B = Brass body material G 12 = ISO 228/1, ½ inch connection E = EPDM seal material NC = Normally closed 667 = Options BB230A = Coil

Production Time

380 = Week 38 2010 032U711531 = Code Number

Note down following information

Valve code no: ______________

Sparepart no.: ______________

Plug

042N0156018Z0081

IC.PS.600.A8.02 | 4

Identiﬁcation

Valve identiﬁcation problem

If above mentioned method is not possible, state the following when ordering Danfoss solenoid valves as replacements:

• Application (closed circuit, open system or drain application)?

• Function (Normally open or normally closed)?

• End connection?

• Medium (water, oil, air, etc.)?

• Kv value?

• Coil voltage?

• Alternating (AC) or direct current (DC)?

IC.PS.600.A8.02 | 5

32U1171.11

Installation

Flow direction

Water hammer

To be able to operate correctly, all solenoid valves must be installed with the arrow cast on the body pointing in the direction of ﬂow.

Water hammer is a typical result of high liquid velocity (high pressure and high ﬂow velocity through small pipe diameters).

There are several reasonable solutions to the problem:

1. Reduce the pressure by installing a pressure reduction valve ahead of the solenoid valve. If possible, increase the pipe diameter.

2. Damp the water hammer by installing a ﬂexible hose or ﬂexible buﬀer ahead of the solenoid valve.

3. Use a solenoid valve of the type EV220B 15 – EV220B 50. The equalizing oriﬁce can be replaced by a version with smaller diameter. This gives a longer closing time (see

Danfoss

“Spare parts” and “Opening and closing times”).

Equalizing oriﬁce

IC.PS.600.A8.02 | 6

Danf

32U1521.11

Installation

Pipe

Test pressure

Tightening up

Danfoss

A32U1175.11

The pipes on both sides of the valve must be securely fastened.

When applying test pressure: All valves in the system must be open. There are three ways of doing this:

1. By applying voltage to the coil

2. By opening the valves manually(when the manual override accessory is ﬁtted)

3. By connecting the Danfoss permanent magnet (see "Tools", page 42)

Note that the manual opening unit is not supplied as standard, but as an accessory for EV220B 15 – EV220B 50 valves (see page 33).

Remember to screw the opening unit back (CLOCKWISE) before starting up the system, otherwise the valve cannot close.

Always use counter-force when tightening up pipe connections, i.e. use a spanner on both the valve body as well as on the pipe connector (as shown).

oss

IC.PS.600.A8.02 | 7

Danfoss

Installation

Dirt in the system

32U1715.11

Always ﬂush out piping before installing a solenoid valve. If there is dirt in the medium, a ﬁlter should be installed ahead of the valve.

IC.PS.600.A8.02 | 8

Danf

32U1744.11

32U1743.11

Installation

Installing the coil

Servo-operated and assisted lift servo-operated valves

Danfoss recommends that the solenoid valve be installed with coil upwards. This minimises the risk of dirt collecting in the armature tube. If “clean” media is used, i.e. media containing no dirt particles, the solenoid valve will operate when installed in the orientation as shown below.

EV245B

EV251B

EV222B

Danfoss

EV245B

EV251B

EV222B

oss

IC.PS.600.A8.02 | 9

Installation

Direct-operated valves

Danfoss

32U1745.11

EV310A

EV210A

IC.PS.600.A8.02 | 10

Danfoss

32U1746.11

Installation

Coil

MADE IN DENMARK

018F4517

Spare part no.

-40T40 °C

Tambient

24V 60Hz 8.5W 14VA

24V 50Hz 10.5W 16VA

F4507

BQ024CS

Cable connection

Check to ensure that the coil operating voltage is correct (see text on coil, in “Volt”). Also ensure that the data is correct (voltage and frequency) and matches the supply. If the two sets of data do not correspond, the coil might burn out. As far as possible, always choose single-frequency coils; they give oﬀ less heat than double-frequency versions.

The coil has three pins. The middle pin is marked according to the illustration (left) and must be used for earthing. The two other pins are coil terminals and either can be used for the phase or neutral supply. The terminals can be used respectively for phase and neutral as required.

Please note for high performance range! When mounting the clip-on coil, simply press it gently onto the armature, until it clicks into place. An O-ring should be ﬁtted over the armature tube before ﬁtting the coil.

Cable entries must always be screwed in correctly.

The cable must be installed as shown in the illustration to avoid water running into the terminal box.

IC.PS.600.A8.02 | 11

Installation

Cable

Coil replacement

To avoid moisture penetrating in the terminal box, the whole cable diameter must be secured in the entry. For this reason, always use round cables as they are the only type that can be eﬀectively sealed.

Note the colours on the cable leads. Yellow/green is always earth. The other leads should be for the phase and neutral supply.

Please note for clip-on coils: When replacing a coil, use a screwdriver to lever it from the armature.

Caution: Before removing a coil, voltage must be disconnec ted, otherwise the coil will burn out.

OFF

IC.PS.600.A8.02 | 12

+ 32 hidden pages

Danfoss How to use solenoid valves User guide

Specifications and Main Features

Frequently Asked Questions

User Manual