How to use - Solenoid valves
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Installation guide How to use solenoid valves Making it easy to be efficient

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...

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

Identification Choosing the correct solenoid valve 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: The coil type (BQ024CS) is printed on the front of the coil as well as voltage (V) and frequency...

Identification Option 2 (2011 →) Printing on armature tube replaces silver labels and date / code no. stamping for identification of the valve. Type Designation = Valve type = 15 mm orifice = Brass body material = ISO 228/1, ½ inch connection = EPDM seal material = Normally closed = Options = Coil Production Time 380 = Week 38 2010 032U711531 = Code Number Note down following information Valve code no: ______________ Sparepart no.: ______________ Plug

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)?

Installation Flow direction 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 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....

Installation The pipes on both sides of the valve must be securely fastened. Test pressure 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,...

Installation 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.

Installation Installing the coil 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. Servo-operated and assisted lift servo-operated valves

Direct-operated valves

Installation Coil Spare part no. Tambient 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...

Installation Cable 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. 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 disconnec­ ed, otherwise the coil will burn out. t

How to choose Product selection made easy for installers With only a few clicks Danfoss Product Selector can help you find the right product for stan­dard applications. The tool is developed to help wholesalers, retailers, installers and the end user to clarify their needs within solenoid valves. With Danfoss’ web based tool, you can access anywhere; from your laptop or smartphone, as long as you have internet acces. In the solenoid valve selector you only need to know 5 things: 1 Medium 2 System 3 Function 4 Connection size 5 Coil voltage The Danfoss selector then presents a result for you...