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1. Install the product to a place where check and handle can be done easily in aim of tightening the
elbow cap when leakage happens.
*Leakage of liquid result in burns for high-temperature fluid or cause bodily injury or damage to the
property when valve leakage happens.
2. Install the product vertically to a place where air is easy to accumulate.
*Failure to follow this notice may prevent the product from functioning properly.
3. Before installing the product, remove foreign substance and scale
*Failure to follow this notice may prevent the product from functioning properly.
4. Tighten the product by hand into piping. Install the product by proper tool like wrench by hexagonal
place on the body. And do not tighten the product excessively.
*Failure to follow this notice may cause deformation of the body and malfunction.
5. Install the product to a place where maintenance and inspection easily.
Prevent the product from excess of the pressure e.g. water hammer.
6.
When test operation for hot water generator, check there is no leakage by means of inspection of
connection and float vent etc.
7.
When leakage of liquid happens because of foreign substance like dust on the valve disc and seat,
please clean the valve seat (see 6.3 Troubleshooting). As immediate action, remove top pf the cap and
tighten the elbow cap to stop the leakage. (Fic.2)
Tighten the elbow cap after removing hose. After tightening please clean valve seat and disc.
Because elbow cap is made of plastic, it's consumable parts.
The elbow cap will be damaged if it is tightened with excessive force(Tightening torque：0.5 N・m more).
8.
Install the product vertically(tolerance angle 5°) to a place where air is easy to accumulate.
* Failure to follow this notice may prevent the product from functioning properly.
9.
If there is a possibility of freezing or the product is not used for an extended period,completely
discharge fluid from the product and pipes, and close the stop valve.
* Failure to follow this notice may cause malfunction of the product due to rusting inside the product and
the pipes or damaged by freezing.
10. If the piping is under negative pressure, it draw in outside air.
11. Install a stop valve(valve cock or gate valve) at the inlet of the air vent valve for maintenance and
inspection.
12. At brass parts, corrosion can be generated depending on the water quality and it cause malfunction.
For the place where corrosion can be expected, select the product made of suitable material like
stainless steel.
13. In case ingredient giving negative influence to internal parts is contained in the liquid and environment,
deterioration of internal parts can be speeded and it cause leakage and malfunction.
14. In case liquid is accumulated in the product for long-term, moving parts can be sticky and cause
malfunction.
15. Nominal size selection chart shows reference value. Suitable size differ according to piping and
environment, so around 20% safety factor is necessary for the selection of the size.
16. To avoid potential difference, do to connection different metal parts otherwise corrosion product or parts
can happen.
Caution
（
5
seal material ect.)from the piping.
■EPDT-273b■
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