WIC Valve Frequently Asked Questions
1. Remove the Philip screw from the plastic housing protector.
2. Unplug the plastic housing from the DIN coil.
3. Remove the terminal block from the plastic housing. Use the Philip screw to push the terminal block out from the plastic housing.
4. On the back of the terminal block, it makes 1, 2 and Ground.
For the DC DIN coil, connect 1 to positive, and 2 to negative. For the AC DIN coil, connect 1 to Hot wire, 2 to Neutral wire, and Ground to Ground wire if required.
Instead of using the Grommet lead wires, the coil has the prongs or pins to connect a standard DIN connector. Therefore, the coil will have a male connection and the plug connecting to the coil is a female connector. The advantages of the DIN Connector is that it allows a quick valve or coil exchange. Yet it is a excellent insulation properties and good for water tightness.
Cv = Flow coefficient or flow capacity rating of valve. The flow coefficient Cv is the volume (in US gallons) of water at 60°F that will flow per minute through a valve with a pressure drop of 1 psi across the valve.
Mathematically the flow coefficient can be expressed as:
Cv = Flow coefficient or flow capacity rating of valve.
F = Rate of flow (US gallons per minute).
SG = Specific gravity of fluid (Water = 1).
ΔP = Pressure drop across valve (psi).
ED 100% indicates suitability of the coil to operate in “continuous service”, in other words it is good for constantly energized.
Ingress Protection (IP) ratings are developed by the European Committee for Electro Technical Standardization (CENELEC) (NEMA IEC 60529 Degrees of Protection Provided by Enclosures – IP Code), specifying the environmental protection the enclosure provides.
The IP rating normally has two (or three) numbers:
1) Protection from solid objects or materials
2) Protection from liquids (water)
3) Protection against mechanical impacts (commonly omitted, the third number is not a part of IEC 60529)
IP FIRST NUMBER – PROTECTION AGAINST SOLID OBJECTS
|0||No special protection|
|1||Protected against solid objects over 50 mm, e.g. accidental touch by persons hands.|
|2||Protected against solid objects over 12 mm, e.g. persons fingers.|
|3||Protected against solid objects over 2.5 mm (tools and wires).|
|4||Protected against solid objects over 1 mm (tools, wires, and small wires).|
|5||Protected against dust limited ingress (no harmful deposit).|
|6||Totally protected against dust.|
IP SECOND NUMBER – PROTECTION AGAINST LIQUIDS
|1||Protection against vertically falling drops of water e.g. condensation.|
|2||Protection against direct sprays of water up to 15o from the vertical.|
|3||Protected against direct sprays of water up to 60o from the vertical.|
|4||Protection against water sprayed from all directions – limited ingress permitted.|
|5||Protected against low pressure jets of water from all directions – limited ingress.|
|6||Protected against temporary flooding of water, e.g. for use on ship decks – limited ingress permitted.|
|7||Protected against the effect of immersion between 15 cm and 1 m.|
|8||Protects against long periods of immersion under pressure.|