Danfoss EV210B Operating instructions

IC.PS.600.A4.02 / 520B2809
how to use
solenoid valves
I N D U S T R I A L A U T O M AT I O N
MAKING MODERN LIVING POSSIBLE

IC.PS.600.A4.02 / 520B2809
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 exibility and
availability. If a coil does need to be replaced
then it can be done without stopping or
draining any system.
The solenoid valves are also available as
assembled units if required.
One call and
you’re in control
One call to Danfoss gives you access to an entire range of high-quality industrial controls. The Danfoss line encompasses
components for industial monitoring and control systems based on the principles of pressure and temperature
measurement, electrical power, and uid control, and includes:
• Electro-mechanical contactors
• Electronic contactors and motor controllers
• Pressure and temperature switches
• Pressure transmitters
• Temperature sensors and transmitters
• Solenoid valves
• Externally operated valves
• Thermostatically operated valves
Given their important monitoring and control functions, Danfoss components are designed for accuracy, reliabillity
and long life. And our determination to guarantee a high-quality product is matched by an equally strong commitment
to customer service. A specialist in the Danfoss industrial controls group can advise you on product selection and
conguration, based on long experience in your industry.You’ll nd that with sales and service centers in over 100
countries, Danfoss is usually only a local call away.

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© Danfoss A/S (IA-MC/mhe) 05-2007 / 520B2809IC.PS.600.A4.02 / 520B2809
This booklet has been compiled to help in the instal-
lation of compact and high performance solenoid
valves and in locating faults in systems with solenoid
valves.
The booklet also contains an overview of solenoid
valves with dimensions to help in sizing valves for new
installations and the modernisation of existing plant.
The compact range has small physical dimensions for
control of ow where space is limited.
The high performance range is a sturdy and universal
valve program for control of ow in industrial plants
and within heating and sanitary systems.
solenoid valves
how to use
Contents Identication 3
Installation 5
How to choose 12
Valve overview 16
Seal material 20
Coils 21
Opening and closing times 23
Fault location 25
Spare parts high performance (blue) range 30
Spare parts compact (black) range 38
Tools 40

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Choosing the correct
solenoid valve
Symbolise valves used in
a closed circuit system,
typically with low
dierential pressures.
Symbolise valves
used in an open sys-
tem. Used typically
for drinking water.
Dierential pressure
higher than 0,5 bar.
Note that this booklet describes only brass
solenoid valves.
For other types, please contact Danfoss.
Solenoid valves
Note !
For more details see page 11.

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© Danfoss A/S (IA-MC/mhe) 05-2007 / 520B2809IC.PS.600.A4.02 / 520B2809
Ο
Identication of Danfoss solenoid valves:
Illustration 1 shows the label with relevant informa-
tion that is attached to the coil.
The example here is from an EV220B solenoid
valve:
15: 15 mm orice
B: Brass body material
G 12: ISO 228/1, 1/2 inch connection
E: EPDM seal material
NC: Normally closed
Identication
Danfoss
solenoid valves
The coil type (BB230AS) is printed on the front of
the coil as well as voltage (V) and frequency (Hz)
- see illustration 2.
After identication, see the rst section of this
handbook.
1
2
B - Valve
High performance

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Ο
If no code is stamped in the valve, the following
information will be of great help when ordering
Danfoss solenoid valves as replacements:
• Application (closed circuit, open
system or drain application)?
• Function (de-energised open or
closed)?
• End connection?
• Medium (water, oil, air, etc.)?
• kvvalue?
• Coil voltage?
• Alternating (ac) or direct current (dc)?
Valve identication
missing
Identication
If the the coil label cannot be read, the valve can be identied from the letter/
number combination stamped in the valve body.
Example:
506U4042
A - Valve
Compact
Week 50 2006 042U4042

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IC.PS.600.A4.02 / 520B2809
© Danfoss A/S (IA-MC/mhe) 05-2007 / 520B2809IC.PS.600.A4.02 / 520B2809
Installation
Flow direction
Water hammer is a typical result of high liquid
velocity (high pressure and high ow velocity
through small pipe diameters).
There are several reasonable solutions to the
problem:
A: Reduce the pressure by installing a pressure
reduction valve ahead of the solenoid valve. If pos-
sible, increase the pipe diameter.
B: Damp the water hammer by installing a exible
hose or exible buer ahead of the solenoid valve.
C: Use a solenoid valve of the type EV220B 15-50.
The equalising orice can be replaced by a version
with smaller diameter. This gives a longer closing
time (see“Spare parts”and“Opening and closing
times”).
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 ow.
Equalising orice

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Installation
Test pressure
Tightening up
Pipe 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 tted)
3. By connecting the Danfoss permanent mag-
net (see Tools, page 40)
Note that the manual opening unit is not supplied
as standard, but as an accessory for EV220B 15-50
valves (see page 31).
Remember to screw the opening unit back
(CLOCKWISE) before starting up the system, other-
wise 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).

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© Danfoss A/S (IA-MC/mhe) 05-2007 / 520B2809IC.PS.600.A4.02 / 520B2809
Installation
Always ush out piping before installing a solenoid
valve. If there is dirt in the medium, a lter should
be installed ahead of the valve.
Dirt in the system

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Installation
Servo-operated and
assisted lift
servo-operated valves
Installing the coil Danfoss recommends that the solenoid valve be in-
stalled with coil upwards. This minimises the risk of dirt
collecting in the armature tube.
If “clean”media is used, i.e. media containing no dirtpar-
ticles, the solenoid valve will operate when installed in
the orientation as shown below.

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Direct-operated valves
Installation

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The cable must be installed as shown in the
illistration to avoid water running into the
terminal box.
Installation
Cable connection
Coil 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 o 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.
When mounting the clip-on coil, simply press it
gently onto the armature, until it clicks into place.
An O-ring should normally be tted over the
armature tube before tting the coil.
Cable entries must always be screwed in correctly.
Please note for high performance range!

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© Danfoss A/S (IA-MC/mhe) 05-2007 / 520B2809IC.PS.600.A4.02 / 520B2809
Installation
Cable
Coil replacement 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
disconnected, otherwise the coil will burn out.
Note the colours on the cable leads. Yellow/green
is always earth. The other leads should be for the
phase and neutral supply.
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 eectively
sealed.

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How to Choose
It is important to indentify all relevant parameters when selecting a solenoid
valve.
This includes:
• Capacity / kv- value
• Pressure conditions
• Media conditions
• Other conditions
Pressure conditions:
Open system (system with drain)
In an open system the pressure conditions are well-dened.
This enables clarication as to whether there is sucient pressure dierential to
be able to open a servo-operated valve. The following types of valves are
well-suited for use in open systems:
EV210B, EV210A, EV310B and EV310A direct -operated solenoid valves
EV220B, EV220A and EV225B servo-operated solenoid valves
Capacity / kv- value:
– Species how many m3/hour (capacity) water is passing through the valve at a
dierential pressure at 1 bar.
– Is a result of all the dierent constants coming from shape of orices, units etc.
which are reduced to one new constant, the kv - value.
– Is used to calculate capacity:
– ρ = density (kg / m3)
– P = P1- P2
Q = k √∆P m3 / h
Vρ
Closed circuit (cirulating system)
In a closed circuit system the pressure conditions are undened. Therefor a
solenoid valve capable of opening without pressure dierential is required.
EV250B assisted lift servo-operated valve
EV210B, EV210A, EV310B and EV310A direct-operated solenoid valves

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© Danfoss A/S (IA-MC/mhe) 05-2007 / 520B2809IC.PS.600.A4.02 / 520B2809
How to Choose
Media conditions:
The valves are designed to resist the temperatures normally found in industrial
applications.
If the temperature is outside these limits, there is a risk of the valve not
functioning correctly because of, for example, rubber materials becoming hard.
Exceeding the temperature rating can also result in the shortening of valve life.
If the valve is to be used in a special application, with a temperature in excess of
the rated limits, there are valves available in the product range which have been
designed for use in higher temperature systems.
Operating pressure
Valves in the standard range are designed for pressure of max 6-30 bar - the
actual gure depends on the type of valve.
The product range includes valves for special application, designed for pressures
of up to 80 bar. The large standard range combined with these valves enable the
use of Danfoss solenoid valves for all types of systems, wether with normal or
more extreme inlet pressures.
Dierential pressure/ MOPD
- Dierence between inlet pressure and outlet pressure (∆P = P1 - P2).
- Max. permissible dierential pressure against which the valve can open
- Also specied as MOPD: Maximum Opening Pressure Dierential
- MOPD species the dierential pressure value in worst case:
• 100 % duty rate
• Maximum medium and ambient temperature
•Nominel voltage, typically -10%
- Specied pressure is often limited by endurance demands more than MOPD

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The characteristics of the medium
The valve have been designed for use with dierent media.
In general the following is valid:
Valves containing EPDM-rubber are suitable for water and steam*.
Valves containing FKM-/NBR-rubber are suitable for oil and air.
Incorrect use of valve types
1) If a valve containing EPDM-rubber is used for a medium containing oil
(compressed air normally contains particles of oil from the compressor)
the rubber will expand and the valve will not be able to function optimally.
2) A valve containing FKM-/NBR-rubber can be used for water. However for
servo-operated valves, the water temperature must be kept below 60°C for FKM,
90°C for NBR. If this temperature is exceeded it will have a negative eect on the
life of the valve.
Other media
For slightly aggressive media (e.g. demineralised water) dezincicationresistant
brass valves must be used. Stainless steel valves are used for more aggressive
media.
*For steam temperatures above 120°C there is a type of valve especially designed for
steam
Other conditions:
Ambient temperature
The ambient temperature must be within certain limits for the coil to function
optimally.
How to Choose

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Filter
In systems with contaminated media there is a risk of moving parts in a valve
not working as intended. Dirt is the most common cause of function failure in
solenoid valves. To help avoid this problem we suggest the tting of a lter on
the upstream side of the valve.
Coil voltage and power
It is necessary to know which voltage (Volt a.c./d.c. nominel ± 10%) is available
within an application to select the correct coil. The maximum permissible
dierential pressure can also be increased by tting a more powerful coil.
The coil power depends on the type of coil (BA,BB,AC,AM etc.)
Other environmental factors
In wet or very humid environments, coils with IP 67 enclosure classication must
be used.
Valve function
Most industrial systems operate with a de-energised closed valve (NC = normally
closed). Our valve range also oers de-energised open valves (NO = normally
open) for applications requiring this feature.
How to Choose
Water hammer
All piping systems with relatively high ow rates are susceptible to water ham-
mer when a valve is opened or closed. A damped solenoid valve ( eg. EV220B
15-50) should be used if there is a risk of water hammer. After installation the
valve can be adjusted for water hammer by changing a replaceable equalising
orice. See "Spare parts"

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EV210B
EV225B
XX X
X X X
X X X
X X X
X
X
X
EV250B
EV220B
EV310B
X X X
Valve overview - High performance (blue) range
Air and
neutral
gases
Medium
Water Oil Steam

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G 1/4" - G 1"
G 1/2" - G 2"
G 3/8" - G 1"
G 1/4" - G 1"
NC/NO
NC/NO
NC/NO
NC
NC
NC/NO
G 1/8" - G 3/8"
G 3/8" - G 1"
Medium
EV210B covers a wide range of direct-ope-
rated 2/2-way solenoid valves for universal
use. EV210B is a real robust valve program
with high performance and can be used in
all kind of tough working conditions.
EV220B 6-22 is a direct servo-operated
2/2-way solenoid valve program. This
program is especially for OEM applications
demanding a robust solution and moderate
ow rates.
EV220B 15-50 is a universal indirect servo-
operated 2/2-way solenoid valve program.
Valve body in brass, dezincication resistant
brass and stainless steel ensures that
a broad variety of applications can be
covered.
EV250B with assisted lift is especially to use
in closed circuits with low dierential pres-
sure, but demanding moderate ow rates.
Valve body in DZR brass ensures a long life,
even in connection with aggressive steam
media.
The EV225B design is based on a PTFE
diaphragm and valve body in dezincica-
tion resistant brass, ensuring high reliable
function and long life even in connection
with contaminated steam.
Characteristics
Connection
[ISO 228/1]
Function
Description
For other characteristics please see the valve selection guide
Valve overview - High performance (blue) range
EV310B is a direct-operated 3/2- way
solenoid valve.
The valve is especially used in connection
with air-operated valves to allow air supply
and air relief for the air actuator.

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EV210A
EV310A
EV220A
X X X
X X X
X X X
Valve overview - Compact (black) range
Air and
neutral
gases
Water Oil Steam
Medium